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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> | |
31 | #include <net/ieee80211.h> | |
32 | ||
33 | #include <linux/netdevice.h> | |
34 | #include <linux/etherdevice.h> | |
35 | #include <linux/delay.h> | |
36 | ||
37 | #include <linux/workqueue.h> | |
38 | ||
b481de9c ZY |
39 | #include "../net/mac80211/ieee80211_rate.h" |
40 | ||
5d08cd1d | 41 | #include "iwl-4965.h" |
b481de9c ZY |
42 | #include "iwl-helpers.h" |
43 | ||
44 | #define RS_NAME "iwl-4965-rs" | |
45 | ||
46 | #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1 | |
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 | ||
bb8c093b | 67 | struct iwl4965_rate { |
b481de9c ZY |
68 | u32 rate_n_flags; |
69 | } __attribute__ ((packed)); | |
70 | ||
77626355 BC |
71 | /** |
72 | * struct iwl4965_rate_scale_data -- tx success history for one rate | |
73 | */ | |
bb8c093b | 74 | struct iwl4965_rate_scale_data { |
77626355 BC |
75 | u64 data; /* bitmap of successful frames */ |
76 | s32 success_counter; /* number of frames successful */ | |
77 | s32 success_ratio; /* per-cent * 128 */ | |
78 | s32 counter; /* number of frames attempted */ | |
79 | s32 average_tpt; /* success ratio * expected throughput */ | |
b481de9c ZY |
80 | unsigned long stamp; |
81 | }; | |
82 | ||
77626355 BC |
83 | /** |
84 | * struct iwl4965_scale_tbl_info -- tx params and success history for all rates | |
85 | * | |
0c11b4de | 86 | * There are two of these in struct iwl4965_lq_sta, |
77626355 BC |
87 | * one for "active", and one for "search". |
88 | */ | |
bb8c093b CH |
89 | struct iwl4965_scale_tbl_info { |
90 | enum iwl4965_table_type lq_type; | |
91 | enum iwl4965_antenna_type antenna_type; | |
77626355 BC |
92 | u8 is_SGI; /* 1 = short guard interval */ |
93 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
94 | u8 is_dup; /* 1 = duplicated data streams */ | |
95 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
96 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
97 | struct iwl4965_rate current_rate; /* rate_n_flags, uCode API format */ | |
98 | struct iwl4965_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ | |
b481de9c ZY |
99 | }; |
100 | ||
0c11b4de RR |
101 | #ifdef CONFIG_IWL4965_HT |
102 | ||
103 | struct iwl4965_traffic_load { | |
104 | unsigned long time_stamp; /* age of the oldest statistics */ | |
105 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
106 | * slice */ | |
107 | u32 total; /* total num of packets during the | |
108 | * last TID_MAX_TIME_DIFF */ | |
109 | u8 queue_count; /* number of queues that has | |
110 | * been used since the last cleanup */ | |
111 | u8 head; /* start of the circular buffer */ | |
112 | }; | |
113 | ||
114 | #endif /* CONFIG_IWL4965_HT */ | |
115 | ||
77626355 | 116 | /** |
0c11b4de | 117 | * struct iwl4965_lq_sta -- driver's rate scaling private structure |
77626355 BC |
118 | * |
119 | * Pointer to this gets passed back and forth between driver and mac80211. | |
120 | */ | |
c33104f0 | 121 | struct iwl4965_lq_sta { |
77626355 BC |
122 | u8 active_tbl; /* index of active table, range 0-1 */ |
123 | u8 enable_counter; /* indicates HT mode */ | |
124 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
125 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 126 | s32 last_tpt; |
77626355 BC |
127 | |
128 | /* The following determine when to search for a new mode */ | |
b481de9c | 129 | u32 table_count_limit; |
77626355 BC |
130 | u32 max_failure_limit; /* # failed frames before new search */ |
131 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 132 | u32 table_count; |
77626355 BC |
133 | u32 total_failed; /* total failed frames, any/all rates */ |
134 | u32 total_success; /* total successful frames, any/all rates */ | |
135 | u32 flush_timer; /* time staying in mode before new search */ | |
136 | ||
137 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
138 | u8 antenna; |
139 | u8 valid_antenna; | |
140 | u8 is_green; | |
141 | u8 is_dup; | |
8318d78a | 142 | enum ieee80211_band band; |
b481de9c | 143 | u8 ibss_sta_added; |
77626355 BC |
144 | |
145 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 146 | u32 supp_rates; |
b481de9c ZY |
147 | u16 active_rate; |
148 | u16 active_siso_rate; | |
149 | u16 active_mimo_rate; | |
150 | u16 active_rate_basic; | |
77626355 | 151 | |
bb8c093b | 152 | struct iwl4965_link_quality_cmd lq; |
77626355 | 153 | struct iwl4965_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
0c11b4de RR |
154 | #ifdef CONFIG_IWL4965_HT |
155 | struct iwl4965_traffic_load load[TID_MAX_LOAD_COUNT]; | |
156 | u8 tx_agg_tid_en; | |
157 | #endif | |
5ae212c9 | 158 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 159 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 160 | struct dentry *rs_sta_dbgfs_stats_table_file; |
0c11b4de RR |
161 | #ifdef CONFIG_IWL4965_HT |
162 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; | |
163 | #endif | |
bb8c093b CH |
164 | struct iwl4965_rate dbg_fixed; |
165 | struct iwl4965_priv *drv; | |
5ae212c9 | 166 | #endif |
b481de9c ZY |
167 | }; |
168 | ||
bb8c093b | 169 | static void rs_rate_scale_perform(struct iwl4965_priv *priv, |
b481de9c ZY |
170 | struct net_device *dev, |
171 | struct ieee80211_hdr *hdr, | |
172 | struct sta_info *sta); | |
c33104f0 | 173 | static void rs_fill_link_cmd(struct iwl4965_lq_sta *lq_sta, |
bb8c093b CH |
174 | struct iwl4965_rate *tx_mcs, |
175 | struct iwl4965_link_quality_cmd *tbl); | |
b481de9c ZY |
176 | |
177 | ||
98d7e09a | 178 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 179 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 180 | struct iwl4965_rate *mcs, int index); |
98d7e09a | 181 | #else |
c33104f0 | 182 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 183 | struct iwl4965_rate *mcs, int index) |
98d7e09a ZY |
184 | {} |
185 | #endif | |
77626355 BC |
186 | |
187 | /* | |
188 | * Expected throughput metrics for following rates: | |
189 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
190 | * "G" is the only table that supports CCK (the first 4 rates). | |
191 | */ | |
b481de9c ZY |
192 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
193 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
194 | }; | |
195 | ||
196 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
197 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
198 | }; | |
199 | ||
200 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
201 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
202 | }; | |
203 | ||
204 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
205 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
206 | }; | |
207 | ||
208 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
209 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
210 | }; | |
211 | ||
212 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
213 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
214 | }; | |
215 | ||
216 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
217 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
218 | }; | |
219 | ||
220 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
221 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
222 | }; | |
223 | ||
224 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
225 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
226 | }; | |
227 | ||
228 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
229 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
230 | }; | |
231 | ||
bb8c093b CH |
232 | static int iwl4965_lq_sync_callback(struct iwl4965_priv *priv, |
233 | struct iwl4965_cmd *cmd, struct sk_buff *skb) | |
b481de9c ZY |
234 | { |
235 | /*We didn't cache the SKB; let the caller free it */ | |
236 | return 1; | |
237 | } | |
238 | ||
bb8c093b | 239 | static inline u8 iwl4965_rate_get_rate(u32 rate_n_flags) |
b481de9c ZY |
240 | { |
241 | return (u8)(rate_n_flags & 0xFF); | |
242 | } | |
243 | ||
bb8c093b CH |
244 | static int rs_send_lq_cmd(struct iwl4965_priv *priv, |
245 | struct iwl4965_link_quality_cmd *lq, u8 flags) | |
b481de9c | 246 | { |
0a6857e7 | 247 | #ifdef CONFIG_IWLWIFI_DEBUG |
b481de9c ZY |
248 | int i; |
249 | #endif | |
bb8c093b | 250 | struct iwl4965_host_cmd cmd = { |
b481de9c | 251 | .id = REPLY_TX_LINK_QUALITY_CMD, |
bb8c093b | 252 | .len = sizeof(struct iwl4965_link_quality_cmd), |
b481de9c ZY |
253 | .meta.flags = flags, |
254 | .data = lq, | |
255 | }; | |
256 | ||
257 | if ((lq->sta_id == 0xFF) && | |
258 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
dc2453ae | 259 | return -EINVAL; |
b481de9c ZY |
260 | |
261 | if (lq->sta_id == 0xFF) | |
262 | lq->sta_id = IWL_AP_ID; | |
263 | ||
264 | IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id); | |
265 | IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n", | |
266 | lq->general_params.single_stream_ant_msk, | |
267 | lq->general_params.dual_stream_ant_msk); | |
0a6857e7 | 268 | #ifdef CONFIG_IWLWIFI_DEBUG |
b481de9c ZY |
269 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) |
270 | IWL_DEBUG_RATE("lq index %d 0x%X\n", | |
271 | i, lq->rs_table[i].rate_n_flags); | |
272 | #endif | |
273 | ||
274 | if (flags & CMD_ASYNC) | |
bb8c093b | 275 | cmd.meta.u.callback = iwl4965_lq_sync_callback; |
b481de9c | 276 | |
bb8c093b | 277 | if (iwl4965_is_associated(priv) && priv->assoc_station_added && |
b481de9c | 278 | priv->lq_mngr.lq_ready) |
bb8c093b | 279 | return iwl4965_send_cmd(priv, &cmd); |
b481de9c | 280 | |
dc2453ae | 281 | return 0; |
b481de9c ZY |
282 | } |
283 | ||
bb8c093b | 284 | static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window) |
b481de9c ZY |
285 | { |
286 | window->data = 0; | |
287 | window->success_counter = 0; | |
288 | window->success_ratio = IWL_INVALID_VALUE; | |
289 | window->counter = 0; | |
290 | window->average_tpt = IWL_INVALID_VALUE; | |
291 | window->stamp = 0; | |
b481de9c ZY |
292 | } |
293 | ||
0c11b4de RR |
294 | #ifdef CONFIG_IWL4965_HT |
295 | /* | |
296 | * removes the old data from the statistics. All data that is older than | |
297 | * TID_MAX_TIME_DIFF, will be deleted. | |
298 | */ | |
299 | static void rs_tl_rm_old_stats(struct iwl4965_traffic_load *tl, u32 curr_time) | |
300 | { | |
301 | /* The oldest age we want to keep */ | |
302 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
303 | ||
304 | while (tl->queue_count && | |
305 | (tl->time_stamp < oldest_time)) { | |
306 | tl->total -= tl->packet_count[tl->head]; | |
307 | tl->packet_count[tl->head] = 0; | |
308 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
309 | tl->queue_count--; | |
310 | tl->head++; | |
311 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
312 | tl->head = 0; | |
313 | } | |
314 | } | |
315 | ||
316 | /* | |
317 | * increment traffic load value for tid and also remove | |
318 | * any old values if passed the certain time period | |
319 | */ | |
320 | static void rs_tl_add_packet(struct iwl4965_lq_sta *lq_data, u8 tid) | |
321 | { | |
322 | u32 curr_time = jiffies_to_msecs(jiffies); | |
323 | u32 time_diff; | |
324 | s32 index; | |
325 | struct iwl4965_traffic_load *tl = NULL; | |
326 | ||
327 | if (tid >= TID_MAX_LOAD_COUNT) | |
328 | return; | |
329 | ||
330 | tl = &lq_data->load[tid]; | |
331 | ||
332 | curr_time -= curr_time % TID_ROUND_VALUE; | |
333 | ||
334 | /* Happens only for the first packet. Initialize the data */ | |
335 | if (!(tl->queue_count)) { | |
336 | tl->total = 1; | |
337 | tl->time_stamp = curr_time; | |
338 | tl->queue_count = 1; | |
339 | tl->head = 0; | |
340 | tl->packet_count[0] = 1; | |
341 | return; | |
342 | } | |
343 | ||
344 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
345 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
346 | ||
347 | /* The history is too long: remove data that is older than */ | |
348 | /* TID_MAX_TIME_DIFF */ | |
349 | if (index >= TID_QUEUE_MAX_SIZE) | |
350 | rs_tl_rm_old_stats(tl, curr_time); | |
351 | ||
352 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
353 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
354 | tl->total = tl->total + 1; | |
355 | ||
356 | if ((index + 1) > tl->queue_count) | |
357 | tl->queue_count = index + 1; | |
358 | } | |
359 | ||
360 | /* | |
361 | get the traffic load value for tid | |
362 | */ | |
363 | static u32 rs_tl_get_load(struct iwl4965_lq_sta *lq_data, u8 tid) | |
364 | { | |
365 | u32 curr_time = jiffies_to_msecs(jiffies); | |
366 | u32 time_diff; | |
367 | s32 index; | |
368 | struct iwl4965_traffic_load *tl = NULL; | |
369 | ||
370 | if (tid >= TID_MAX_LOAD_COUNT) | |
371 | return 0; | |
372 | ||
373 | tl = &(lq_data->load[tid]); | |
374 | ||
375 | curr_time -= curr_time % TID_ROUND_VALUE; | |
376 | ||
377 | if (!(tl->queue_count)) | |
378 | return 0; | |
379 | ||
380 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
381 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
382 | ||
383 | /* The history is too long: remove data that is older than */ | |
384 | /* TID_MAX_TIME_DIFF */ | |
385 | if (index >= TID_QUEUE_MAX_SIZE) | |
386 | rs_tl_rm_old_stats(tl, curr_time); | |
387 | ||
388 | return tl->total; | |
389 | } | |
390 | ||
391 | static void rs_tl_turn_on_agg_for_tid(struct iwl4965_priv *priv, | |
392 | struct iwl4965_lq_sta *lq_data, u8 tid, | |
393 | struct sta_info *sta) | |
394 | { | |
395 | unsigned long state; | |
396 | DECLARE_MAC_BUF(mac); | |
397 | ||
398 | spin_lock_bh(&sta->ampdu_mlme.ampdu_tx); | |
399 | state = sta->ampdu_mlme.tid_tx[tid].state; | |
400 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); | |
401 | ||
402 | if (state == HT_AGG_STATE_IDLE && | |
403 | rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { | |
404 | IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n", | |
405 | print_mac(mac, sta->addr), tid); | |
406 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); | |
407 | } | |
408 | } | |
409 | ||
410 | static void rs_tl_turn_on_agg(struct iwl4965_priv *priv, u8 tid, | |
411 | struct iwl4965_lq_sta *lq_data, | |
412 | struct sta_info *sta) | |
413 | { | |
414 | if ((tid < TID_MAX_LOAD_COUNT)) | |
415 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
416 | else if (tid == IWL_AGG_ALL_TID) | |
417 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
418 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
419 | } | |
420 | ||
421 | #endif /* CONFIG_IWLWIFI_HT */ | |
422 | ||
77626355 BC |
423 | /** |
424 | * rs_collect_tx_data - Update the success/failure sliding window | |
425 | * | |
426 | * We keep a sliding window of the last 62 packets transmitted | |
427 | * at this rate. window->data contains the bitmask of successful | |
428 | * packets. | |
429 | */ | |
bb8c093b | 430 | static int rs_collect_tx_data(struct iwl4965_rate_scale_data *windows, |
99556438 RR |
431 | int scale_index, s32 tpt, int retries, |
432 | int successes) | |
b481de9c | 433 | { |
bb8c093b | 434 | struct iwl4965_rate_scale_data *window = NULL; |
b481de9c ZY |
435 | u64 mask; |
436 | u8 win_size = IWL_RATE_MAX_WINDOW; | |
437 | s32 fail_count; | |
438 | ||
dc2453ae TW |
439 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
440 | return -EINVAL; | |
b481de9c | 441 | |
77626355 | 442 | /* Select data for current tx bit rate */ |
b481de9c ZY |
443 | window = &(windows[scale_index]); |
444 | ||
77626355 BC |
445 | /* |
446 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
447 | * history window; anything older isn't really relevant any more. | |
448 | * If we have filled up the sliding window, drop the oldest attempt; | |
449 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
450 | * subtract "1" from the success counter (this is the main reason | |
451 | * we keep these bitmaps!). | |
452 | */ | |
99556438 RR |
453 | while (retries > 0) { |
454 | if (window->counter >= win_size) { | |
455 | window->counter = win_size - 1; | |
456 | mask = 1; | |
457 | mask = (mask << (win_size - 1)); | |
458 | if (window->data & mask) { | |
459 | window->data &= ~mask; | |
460 | window->success_counter = | |
461 | window->success_counter - 1; | |
462 | } | |
b481de9c | 463 | } |
b481de9c | 464 | |
99556438 RR |
465 | /* Increment frames-attempted counter */ |
466 | window->counter++; | |
467 | ||
468 | /* Shift bitmap by one frame (throw away oldest history), | |
469 | * OR in "1", and increment "success" if this | |
470 | * frame was successful. */ | |
471 | mask = window->data; | |
472 | window->data = (mask << 1); | |
473 | if (successes > 0) { | |
474 | window->success_counter = window->success_counter + 1; | |
475 | window->data |= 0x1; | |
476 | successes--; | |
477 | } | |
77626355 | 478 | |
99556438 | 479 | retries--; |
b481de9c ZY |
480 | } |
481 | ||
77626355 | 482 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
483 | if (window->counter > 0) |
484 | window->success_ratio = 128 * (100 * window->success_counter) | |
485 | / window->counter; | |
486 | else | |
487 | window->success_ratio = IWL_INVALID_VALUE; | |
488 | ||
489 | fail_count = window->counter - window->success_counter; | |
490 | ||
77626355 | 491 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
492 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
493 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
494 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
495 | else | |
496 | window->average_tpt = IWL_INVALID_VALUE; | |
497 | ||
77626355 | 498 | /* Tag this window as having been updated */ |
b481de9c ZY |
499 | window->stamp = jiffies; |
500 | ||
dc2453ae | 501 | return 0; |
b481de9c ZY |
502 | } |
503 | ||
77626355 BC |
504 | /* |
505 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
506 | */ | |
bb8c093b CH |
507 | static void rs_mcs_from_tbl(struct iwl4965_rate *mcs_rate, |
508 | struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
509 | int index, u8 use_green) |
510 | { | |
b481de9c | 511 | if (is_legacy(tbl->lq_type)) { |
bb8c093b | 512 | mcs_rate->rate_n_flags = iwl4965_rates[index].plcp; |
b481de9c ZY |
513 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
514 | mcs_rate->rate_n_flags |= RATE_MCS_CCK_MSK; | |
515 | ||
516 | } else if (is_siso(tbl->lq_type)) { | |
517 | if (index > IWL_LAST_OFDM_RATE) | |
518 | index = IWL_LAST_OFDM_RATE; | |
bb8c093b | 519 | mcs_rate->rate_n_flags = iwl4965_rates[index].plcp_siso | |
b481de9c ZY |
520 | RATE_MCS_HT_MSK; |
521 | } else { | |
522 | if (index > IWL_LAST_OFDM_RATE) | |
523 | index = IWL_LAST_OFDM_RATE; | |
bb8c093b | 524 | mcs_rate->rate_n_flags = iwl4965_rates[index].plcp_mimo | |
b481de9c ZY |
525 | RATE_MCS_HT_MSK; |
526 | } | |
527 | ||
528 | switch (tbl->antenna_type) { | |
529 | case ANT_BOTH: | |
530 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_AB_MSK; | |
531 | break; | |
532 | case ANT_MAIN: | |
533 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
534 | break; | |
535 | case ANT_AUX: | |
536 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
537 | break; | |
538 | case ANT_NONE: | |
539 | break; | |
540 | } | |
541 | ||
542 | if (is_legacy(tbl->lq_type)) | |
dc2453ae | 543 | return; |
b481de9c ZY |
544 | |
545 | if (tbl->is_fat) { | |
546 | if (tbl->is_dup) | |
547 | mcs_rate->rate_n_flags |= RATE_MCS_DUP_MSK; | |
548 | else | |
549 | mcs_rate->rate_n_flags |= RATE_MCS_FAT_MSK; | |
550 | } | |
551 | if (tbl->is_SGI) | |
552 | mcs_rate->rate_n_flags |= RATE_MCS_SGI_MSK; | |
553 | ||
554 | if (use_green) { | |
555 | mcs_rate->rate_n_flags |= RATE_MCS_GF_MSK; | |
556 | if (is_siso(tbl->lq_type)) | |
557 | mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
558 | } | |
b481de9c ZY |
559 | } |
560 | ||
77626355 BC |
561 | /* |
562 | * Interpret uCode API's rate_n_flags format, | |
563 | * fill "search" or "active" tx mode table. | |
564 | */ | |
bb8c093b | 565 | static int rs_get_tbl_info_from_mcs(const struct iwl4965_rate *mcs_rate, |
8318d78a JB |
566 | enum ieee80211_band band, |
567 | struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
568 | int *rate_idx) |
569 | { | |
570 | int index; | |
571 | u32 ant_msk; | |
572 | ||
17744ff6 | 573 | index = iwl4965_hwrate_to_plcp_idx(mcs_rate->rate_n_flags); |
b481de9c ZY |
574 | |
575 | if (index == IWL_RATE_INVALID) { | |
576 | *rate_idx = -1; | |
dc2453ae | 577 | return -EINVAL; |
b481de9c | 578 | } |
77626355 | 579 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
580 | tbl->is_fat = 0; |
581 | tbl->is_dup = 0; | |
77626355 | 582 | tbl->antenna_type = ANT_BOTH; /* default MIMO setup */ |
b481de9c | 583 | |
77626355 | 584 | /* legacy rate format */ |
b481de9c ZY |
585 | if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { |
586 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
587 | ||
588 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
589 | tbl->lq_type = LQ_NONE; | |
590 | else { | |
591 | ||
8318d78a | 592 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
593 | tbl->lq_type = LQ_A; |
594 | else | |
595 | tbl->lq_type = LQ_G; | |
596 | ||
597 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
598 | tbl->antenna_type = ANT_MAIN; | |
599 | else | |
600 | tbl->antenna_type = ANT_AUX; | |
601 | } | |
602 | *rate_idx = index; | |
603 | ||
77626355 | 604 | /* HT rate format, SISO (might be 20 MHz legacy or 40 MHz fat width) */ |
bb8c093b | 605 | } else if (iwl4965_rate_get_rate(mcs_rate->rate_n_flags) |
b481de9c ZY |
606 | <= IWL_RATE_SISO_60M_PLCP) { |
607 | tbl->lq_type = LQ_SISO; | |
608 | ||
609 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
610 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
611 | tbl->lq_type = LQ_NONE; | |
612 | else { | |
613 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
614 | tbl->antenna_type = ANT_MAIN; | |
615 | else | |
616 | tbl->antenna_type = ANT_AUX; | |
617 | } | |
618 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
619 | tbl->is_SGI = 1; | |
620 | ||
621 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
622 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
623 | tbl->is_fat = 1; | |
624 | ||
625 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
626 | tbl->is_dup = 1; | |
627 | ||
628 | *rate_idx = index; | |
77626355 BC |
629 | |
630 | /* HT rate format, MIMO (might be 20 MHz legacy or 40 MHz fat width) */ | |
b481de9c ZY |
631 | } else { |
632 | tbl->lq_type = LQ_MIMO; | |
633 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
634 | tbl->is_SGI = 1; | |
635 | ||
636 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
637 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
638 | tbl->is_fat = 1; | |
639 | ||
640 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
641 | tbl->is_dup = 1; | |
642 | *rate_idx = index; | |
643 | } | |
644 | return 0; | |
645 | } | |
646 | ||
bb8c093b CH |
647 | static inline void rs_toggle_antenna(struct iwl4965_rate *new_rate, |
648 | struct iwl4965_scale_tbl_info *tbl) | |
b481de9c ZY |
649 | { |
650 | if (tbl->antenna_type == ANT_AUX) { | |
651 | tbl->antenna_type = ANT_MAIN; | |
652 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_B_MSK; | |
653 | new_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
654 | } else { | |
655 | tbl->antenna_type = ANT_AUX; | |
656 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
657 | new_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
658 | } | |
659 | } | |
660 | ||
270243a5 RR |
661 | static inline u8 rs_use_green(struct iwl4965_priv *priv, |
662 | struct ieee80211_conf *conf) | |
b481de9c | 663 | { |
c8b0e6e1 | 664 | #ifdef CONFIG_IWL4965_HT |
270243a5 RR |
665 | return ((conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
666 | priv->current_ht_config.is_green_field && | |
667 | !priv->current_ht_config.non_GF_STA_present); | |
668 | #endif /* CONFIG_IWL4965_HT */ | |
dc2453ae | 669 | return 0; |
b481de9c ZY |
670 | } |
671 | ||
672 | /** | |
673 | * rs_get_supported_rates - get the available rates | |
674 | * | |
675 | * if management frame or broadcast frame only return | |
676 | * basic available rates. | |
677 | * | |
678 | */ | |
c33104f0 | 679 | static void rs_get_supported_rates(struct iwl4965_lq_sta *lq_sta, |
b481de9c | 680 | struct ieee80211_hdr *hdr, |
bb8c093b | 681 | enum iwl4965_table_type rate_type, |
b481de9c ZY |
682 | u16 *data_rate) |
683 | { | |
684 | if (is_legacy(rate_type)) | |
c33104f0 | 685 | *data_rate = lq_sta->active_rate; |
b481de9c ZY |
686 | else { |
687 | if (is_siso(rate_type)) | |
c33104f0 | 688 | *data_rate = lq_sta->active_siso_rate; |
b481de9c | 689 | else |
c33104f0 | 690 | *data_rate = lq_sta->active_mimo_rate; |
b481de9c ZY |
691 | } |
692 | ||
693 | if (hdr && is_multicast_ether_addr(hdr->addr1) && | |
c33104f0 TW |
694 | lq_sta->active_rate_basic) { |
695 | *data_rate = lq_sta->active_rate_basic; | |
696 | } | |
b481de9c ZY |
697 | } |
698 | ||
699 | static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) | |
700 | { | |
701 | u8 high = IWL_RATE_INVALID; | |
702 | u8 low = IWL_RATE_INVALID; | |
703 | ||
01ebd063 | 704 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
705 | * the rate table */ |
706 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
707 | int i; | |
708 | u32 mask; | |
709 | ||
710 | /* Find the previous rate that is in the rate mask */ | |
711 | i = index - 1; | |
712 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
713 | if (rate_mask & mask) { | |
714 | low = i; | |
715 | break; | |
716 | } | |
717 | } | |
718 | ||
719 | /* Find the next rate that is in the rate mask */ | |
720 | i = index + 1; | |
721 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
722 | if (rate_mask & mask) { | |
723 | high = i; | |
724 | break; | |
725 | } | |
726 | } | |
727 | ||
728 | return (high << 8) | low; | |
729 | } | |
730 | ||
731 | low = index; | |
732 | while (low != IWL_RATE_INVALID) { | |
bb8c093b | 733 | low = iwl4965_rates[low].prev_rs; |
b481de9c ZY |
734 | if (low == IWL_RATE_INVALID) |
735 | break; | |
736 | if (rate_mask & (1 << low)) | |
737 | break; | |
738 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
739 | } | |
740 | ||
741 | high = index; | |
742 | while (high != IWL_RATE_INVALID) { | |
bb8c093b | 743 | high = iwl4965_rates[high].next_rs; |
b481de9c ZY |
744 | if (high == IWL_RATE_INVALID) |
745 | break; | |
746 | if (rate_mask & (1 << high)) | |
747 | break; | |
748 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
749 | } | |
750 | ||
751 | return (high << 8) | low; | |
752 | } | |
753 | ||
c33104f0 | 754 | static void rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta, |
bb8c093b CH |
755 | struct iwl4965_scale_tbl_info *tbl, u8 scale_index, |
756 | u8 ht_possible, struct iwl4965_rate *mcs_rate) | |
b481de9c | 757 | { |
b481de9c ZY |
758 | s32 low; |
759 | u16 rate_mask; | |
760 | u16 high_low; | |
761 | u8 switch_to_legacy = 0; | |
c33104f0 | 762 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
763 | |
764 | /* check if we need to switch from HT to legacy rates. | |
765 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
766 | * are always supported (spec demand) */ | |
767 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
768 | switch_to_legacy = 1; | |
769 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 770 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
771 | tbl->lq_type = LQ_A; |
772 | else | |
773 | tbl->lq_type = LQ_G; | |
774 | ||
775 | if ((tbl->antenna_type == ANT_BOTH) || | |
776 | (tbl->antenna_type == ANT_NONE)) | |
777 | tbl->antenna_type = ANT_MAIN; | |
778 | ||
779 | tbl->is_fat = 0; | |
780 | tbl->is_SGI = 0; | |
781 | } | |
782 | ||
c33104f0 | 783 | rs_get_supported_rates(lq_sta, NULL, tbl->lq_type, &rate_mask); |
b481de9c | 784 | |
77626355 | 785 | /* Mask with station rate restriction */ |
b481de9c | 786 | if (is_legacy(tbl->lq_type)) { |
77626355 | 787 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 788 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 789 | rate_mask = (u16)(rate_mask & |
c33104f0 | 790 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 791 | else |
c33104f0 | 792 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
793 | } |
794 | ||
77626355 | 795 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 796 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
b481de9c | 797 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); |
dc2453ae | 798 | return; |
b481de9c ZY |
799 | } |
800 | ||
801 | high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); | |
802 | low = high_low & 0xff; | |
803 | ||
804 | if (low != IWL_RATE_INVALID) | |
805 | rs_mcs_from_tbl(mcs_rate, tbl, low, is_green); | |
806 | else | |
807 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
b481de9c ZY |
808 | } |
809 | ||
77626355 BC |
810 | /* |
811 | * mac80211 sends us Tx status | |
812 | */ | |
c33104f0 | 813 | static void rs_tx_status(void *priv_rate, struct net_device *dev, |
b481de9c ZY |
814 | struct sk_buff *skb, |
815 | struct ieee80211_tx_status *tx_resp) | |
816 | { | |
817 | int status; | |
818 | u8 retries; | |
819 | int rs_index, index = 0; | |
c33104f0 | 820 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 821 | struct iwl4965_link_quality_cmd *table; |
b481de9c ZY |
822 | struct sta_info *sta; |
823 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
bb8c093b | 824 | struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; |
b481de9c | 825 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
4c424e4c | 826 | struct ieee80211_hw *hw = local_to_hw(local); |
bb8c093b CH |
827 | struct iwl4965_rate_scale_data *window = NULL; |
828 | struct iwl4965_rate_scale_data *search_win = NULL; | |
829 | struct iwl4965_rate tx_mcs; | |
830 | struct iwl4965_scale_tbl_info tbl_type; | |
831 | struct iwl4965_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c ZY |
832 | u8 active_index = 0; |
833 | u16 fc = le16_to_cpu(hdr->frame_control); | |
834 | s32 tpt = 0; | |
835 | ||
58826351 | 836 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
837 | |
838 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
839 | return; | |
840 | ||
99556438 RR |
841 | /* This packet was aggregated but doesn't carry rate scale info */ |
842 | if ((tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) && | |
843 | !(tx_resp->flags & IEEE80211_TX_STATUS_AMPDU)) | |
844 | return; | |
845 | ||
b481de9c ZY |
846 | retries = tx_resp->retry_count; |
847 | ||
848 | if (retries > 15) | |
849 | retries = 15; | |
850 | ||
d0709a65 | 851 | rcu_read_lock(); |
b481de9c ZY |
852 | |
853 | sta = sta_info_get(local, hdr->addr1); | |
854 | ||
f4d6082d TW |
855 | if (!sta || !sta->rate_ctrl_priv) |
856 | goto out; | |
857 | ||
b481de9c | 858 | |
c33104f0 | 859 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c ZY |
860 | |
861 | if (!priv->lq_mngr.lq_ready) | |
f4d6082d | 862 | goto out; |
b481de9c | 863 | |
c33104f0 TW |
864 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
865 | !lq_sta->ibss_sta_added) | |
f4d6082d | 866 | goto out; |
b481de9c | 867 | |
c33104f0 TW |
868 | table = &lq_sta->lq; |
869 | active_index = lq_sta->active_tbl; | |
b481de9c | 870 | |
77626355 | 871 | /* Get mac80211 antenna info */ |
c33104f0 TW |
872 | lq_sta->antenna = |
873 | (lq_sta->valid_antenna & local->hw.conf.antenna_sel_tx); | |
874 | if (!lq_sta->antenna) | |
875 | lq_sta->antenna = lq_sta->valid_antenna; | |
b481de9c | 876 | |
77626355 | 877 | /* Ignore mac80211 antenna info for now */ |
c33104f0 | 878 | lq_sta->antenna = lq_sta->valid_antenna; |
77626355 | 879 | |
c33104f0 TW |
880 | curr_tbl = &(lq_sta->lq_info[active_index]); |
881 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
bb8c093b | 882 | window = (struct iwl4965_rate_scale_data *) |
b481de9c | 883 | &(curr_tbl->win[0]); |
bb8c093b | 884 | search_win = (struct iwl4965_rate_scale_data *) |
b481de9c ZY |
885 | &(search_tbl->win[0]); |
886 | ||
77626355 BC |
887 | /* |
888 | * Ignore this Tx frame response if its initial rate doesn't match | |
889 | * that of latest Link Quality command. There may be stragglers | |
890 | * from a previous Link Quality command, but we're no longer interested | |
891 | * in those; they're either from the "active" mode while we're trying | |
892 | * to check "search" mode, or a prior "search" mode after we've moved | |
893 | * to a new "search" mode (which might become the new "active" mode). | |
894 | */ | |
4c424e4c RR |
895 | tx_mcs.rate_n_flags = le32_to_cpu(table->rs_table[0].rate_n_flags); |
896 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->band, &tbl_type, &rs_index); | |
897 | if (priv->band == IEEE80211_BAND_5GHZ) | |
898 | rs_index -= IWL_FIRST_OFDM_RATE; | |
899 | ||
900 | if ((tx_resp->control.tx_rate == NULL) || | |
901 | (tbl_type.is_SGI ^ | |
902 | !!(tx_resp->control.flags & IEEE80211_TXCTL_SHORT_GI)) || | |
903 | (tbl_type.is_fat ^ | |
904 | !!(tx_resp->control.flags & IEEE80211_TXCTL_40_MHZ_WIDTH)) || | |
905 | (tbl_type.is_dup ^ | |
906 | !!(tx_resp->control.flags & IEEE80211_TXCTL_DUP_DATA)) || | |
907 | (tbl_type.antenna_type ^ | |
908 | tx_resp->control.antenna_sel_tx) || | |
909 | (!!(tx_mcs.rate_n_flags & RATE_MCS_HT_MSK) ^ | |
910 | !!(tx_resp->control.flags & IEEE80211_TXCTL_OFDM_HT)) || | |
911 | (!!(tx_mcs.rate_n_flags & RATE_MCS_GF_MSK) ^ | |
912 | !!(tx_resp->control.flags & IEEE80211_TXCTL_GREEN_FIELD)) || | |
913 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != | |
914 | tx_resp->control.tx_rate->bitrate)) { | |
915 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", | |
916 | tx_mcs.rate_n_flags); | |
f4d6082d | 917 | goto out; |
b481de9c ZY |
918 | } |
919 | ||
77626355 | 920 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 921 | while (retries) { |
77626355 BC |
922 | /* Look up the rate and other info used for each tx attempt. |
923 | * Each tx attempt steps one entry deeper in the rate table. */ | |
b481de9c ZY |
924 | tx_mcs.rate_n_flags = |
925 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
8318d78a | 926 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->band, |
b481de9c ZY |
927 | &tbl_type, &rs_index); |
928 | ||
77626355 BC |
929 | /* If type matches "search" table, |
930 | * add failure to "search" history */ | |
b481de9c ZY |
931 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
932 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
933 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
934 | if (search_tbl->expected_tpt) | |
935 | tpt = search_tbl->expected_tpt[rs_index]; | |
936 | else | |
937 | tpt = 0; | |
99556438 | 938 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
939 | |
940 | /* Else if type matches "current/active" table, | |
941 | * add failure to "current/active" history */ | |
b481de9c ZY |
942 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
943 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
944 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
945 | if (curr_tbl->expected_tpt) | |
946 | tpt = curr_tbl->expected_tpt[rs_index]; | |
947 | else | |
948 | tpt = 0; | |
99556438 | 949 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 950 | } |
77626355 BC |
951 | |
952 | /* If not searching for a new mode, increment failed counter | |
953 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
954 | if (lq_sta->stay_in_tbl) |
955 | lq_sta->total_failed++; | |
b481de9c ZY |
956 | --retries; |
957 | index++; | |
958 | ||
959 | } | |
960 | ||
77626355 BC |
961 | /* |
962 | * Find (by rate) the history window to update with final Tx attempt; | |
963 | * if Tx was successful first try, use original rate, | |
964 | * else look up the rate that was, finally, successful. | |
965 | */ | |
4c424e4c RR |
966 | tx_mcs.rate_n_flags = le32_to_cpu(table->rs_table[index].rate_n_flags); |
967 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->band, &tbl_type, &rs_index); | |
b481de9c | 968 | |
77626355 | 969 | /* Update frame history window with "success" if Tx got ACKed ... */ |
b481de9c ZY |
970 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) |
971 | status = 1; | |
972 | else | |
973 | status = 0; | |
974 | ||
77626355 BC |
975 | /* If type matches "search" table, |
976 | * add final tx status to "search" history */ | |
b481de9c ZY |
977 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
978 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
979 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
980 | if (search_tbl->expected_tpt) | |
981 | tpt = search_tbl->expected_tpt[rs_index]; | |
982 | else | |
983 | tpt = 0; | |
99556438 RR |
984 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) |
985 | rs_collect_tx_data(search_win, rs_index, tpt, | |
986 | tx_resp->ampdu_ack_len, | |
987 | tx_resp->ampdu_ack_map); | |
988 | else | |
989 | rs_collect_tx_data(search_win, rs_index, tpt, | |
990 | 1, status); | |
77626355 BC |
991 | /* Else if type matches "current/active" table, |
992 | * add final tx status to "current/active" history */ | |
b481de9c ZY |
993 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
994 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
995 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
996 | if (curr_tbl->expected_tpt) | |
997 | tpt = curr_tbl->expected_tpt[rs_index]; | |
998 | else | |
999 | tpt = 0; | |
99556438 RR |
1000 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) |
1001 | rs_collect_tx_data(window, rs_index, tpt, | |
1002 | tx_resp->ampdu_ack_len, | |
1003 | tx_resp->ampdu_ack_map); | |
1004 | else | |
1005 | rs_collect_tx_data(window, rs_index, tpt, | |
1006 | 1, status); | |
b481de9c ZY |
1007 | } |
1008 | ||
77626355 BC |
1009 | /* If not searching for new mode, increment success/failed counter |
1010 | * ... these help determine when to start searching again */ | |
c33104f0 | 1011 | if (lq_sta->stay_in_tbl) { |
99556438 RR |
1012 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) { |
1013 | lq_sta->total_success += tx_resp->ampdu_ack_map; | |
1014 | lq_sta->total_failed += | |
1015 | (tx_resp->ampdu_ack_len - tx_resp->ampdu_ack_map); | |
1016 | } else { | |
1017 | if (status) | |
1018 | lq_sta->total_success++; | |
1019 | else | |
1020 | lq_sta->total_failed++; | |
1021 | } | |
b481de9c ZY |
1022 | } |
1023 | ||
77626355 | 1024 | /* See if there's a better rate or modulation mode to try. */ |
b481de9c | 1025 | rs_rate_scale_perform(priv, dev, hdr, sta); |
f4d6082d | 1026 | out: |
d0709a65 | 1027 | rcu_read_unlock(); |
b481de9c ZY |
1028 | return; |
1029 | } | |
1030 | ||
1031 | static u8 rs_is_ant_connected(u8 valid_antenna, | |
bb8c093b | 1032 | enum iwl4965_antenna_type antenna_type) |
b481de9c ZY |
1033 | { |
1034 | if (antenna_type == ANT_AUX) | |
1035 | return ((valid_antenna & 0x2) ? 1:0); | |
1036 | else if (antenna_type == ANT_MAIN) | |
1037 | return ((valid_antenna & 0x1) ? 1:0); | |
dc2453ae TW |
1038 | else if (antenna_type == ANT_BOTH) |
1039 | return ((valid_antenna & 0x3) == 0x3); | |
b481de9c ZY |
1040 | |
1041 | return 1; | |
1042 | } | |
1043 | ||
1044 | static u8 rs_is_other_ant_connected(u8 valid_antenna, | |
bb8c093b | 1045 | enum iwl4965_antenna_type antenna_type) |
b481de9c ZY |
1046 | { |
1047 | if (antenna_type == ANT_AUX) | |
dc2453ae | 1048 | return rs_is_ant_connected(valid_antenna, ANT_MAIN); |
b481de9c | 1049 | else |
dc2453ae | 1050 | return rs_is_ant_connected(valid_antenna, ANT_AUX); |
b481de9c ZY |
1051 | |
1052 | return 0; | |
1053 | } | |
1054 | ||
77626355 BC |
1055 | /* |
1056 | * Begin a period of staying with a selected modulation mode. | |
1057 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1058 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1059 | * and reset overall (spanning all rates) tx success history statistics. | |
1060 | * These control how long we stay using same modulation mode before | |
1061 | * searching for a new mode. | |
1062 | */ | |
b481de9c | 1063 | static void rs_set_stay_in_table(u8 is_legacy, |
c33104f0 | 1064 | struct iwl4965_lq_sta *lq_sta) |
b481de9c ZY |
1065 | { |
1066 | IWL_DEBUG_HT("we are staying in the same table\n"); | |
c33104f0 | 1067 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 1068 | if (is_legacy) { |
c33104f0 TW |
1069 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
1070 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
1071 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1072 | } else { |
c33104f0 TW |
1073 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
1074 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
1075 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1076 | } |
c33104f0 TW |
1077 | lq_sta->table_count = 0; |
1078 | lq_sta->total_failed = 0; | |
1079 | lq_sta->total_success = 0; | |
b481de9c ZY |
1080 | } |
1081 | ||
77626355 BC |
1082 | /* |
1083 | * Find correct throughput table for given mode of modulation | |
1084 | */ | |
c33104f0 | 1085 | static void rs_get_expected_tpt_table(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 1086 | struct iwl4965_scale_tbl_info *tbl) |
b481de9c ZY |
1087 | { |
1088 | if (is_legacy(tbl->lq_type)) { | |
1089 | if (!is_a_band(tbl->lq_type)) | |
1090 | tbl->expected_tpt = expected_tpt_G; | |
1091 | else | |
1092 | tbl->expected_tpt = expected_tpt_A; | |
1093 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1094 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1095 | if (tbl->is_SGI) |
1096 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1097 | else | |
1098 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1099 | else if (tbl->is_SGI) | |
1100 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1101 | else | |
1102 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1103 | ||
1104 | } else if (is_mimo(tbl->lq_type)) { | |
c33104f0 | 1105 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1106 | if (tbl->is_SGI) |
1107 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1108 | else | |
1109 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1110 | else if (tbl->is_SGI) | |
1111 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1112 | else | |
1113 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1114 | } else | |
1115 | tbl->expected_tpt = expected_tpt_G; | |
1116 | } | |
1117 | ||
c8b0e6e1 | 1118 | #ifdef CONFIG_IWL4965_HT |
77626355 BC |
1119 | /* |
1120 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1121 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1122 | * above the current measured throughput of "active" mode, to give new mode | |
1123 | * a fair chance to prove itself without too many challenges. | |
1124 | * | |
1125 | * This gets called when transitioning to more aggressive modulation | |
1126 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1127 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1128 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1129 | * bit rate will typically need to increase, but not if performance was bad. | |
1130 | */ | |
bb8c093b | 1131 | static s32 rs_get_best_rate(struct iwl4965_priv *priv, |
c33104f0 | 1132 | struct iwl4965_lq_sta *lq_sta, |
77626355 | 1133 | struct iwl4965_scale_tbl_info *tbl, /* "search" */ |
b481de9c ZY |
1134 | u16 rate_mask, s8 index, s8 rate) |
1135 | { | |
77626355 | 1136 | /* "active" values */ |
bb8c093b | 1137 | struct iwl4965_scale_tbl_info *active_tbl = |
c33104f0 | 1138 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1139 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1140 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1141 | |
1142 | /* expected "search" throughput */ | |
1143 | s32 *tpt_tbl = tbl->expected_tpt; | |
1144 | ||
1145 | s32 new_rate, high, low, start_hi; | |
b481de9c ZY |
1146 | u16 high_low; |
1147 | ||
1148 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1149 | ||
1150 | for (; ;) { | |
1151 | high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); | |
1152 | ||
1153 | low = high_low & 0xff; | |
1154 | high = (high_low >> 8) & 0xff; | |
1155 | ||
77626355 BC |
1156 | /* |
1157 | * Lower the "search" bit rate, to give new "search" mode | |
1158 | * approximately the same throughput as "active" if: | |
1159 | * | |
1160 | * 1) "Active" mode has been working modestly well (but not | |
1161 | * great), and expected "search" throughput (under perfect | |
1162 | * conditions) at candidate rate is above the actual | |
1163 | * measured "active" throughput (but less than expected | |
1164 | * "active" throughput under perfect conditions). | |
1165 | * OR | |
1166 | * 2) "Active" mode has been working perfectly or very well | |
1167 | * and expected "search" throughput (under perfect | |
1168 | * conditions) at candidate rate is above expected | |
1169 | * "active" throughput (under perfect conditions). | |
1170 | */ | |
c33104f0 | 1171 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1172 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1173 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1174 | (tpt_tbl[rate] <= active_tpt))) || | |
1175 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1176 | (tpt_tbl[rate] > active_tpt))) { | |
1177 | ||
77626355 BC |
1178 | /* (2nd or later pass) |
1179 | * If we've already tried to raise the rate, and are | |
1180 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1181 | if (start_hi != IWL_RATE_INVALID) { |
1182 | new_rate = start_hi; | |
1183 | break; | |
1184 | } | |
77626355 | 1185 | |
b481de9c | 1186 | new_rate = rate; |
77626355 BC |
1187 | |
1188 | /* Loop again with lower rate */ | |
b481de9c ZY |
1189 | if (low != IWL_RATE_INVALID) |
1190 | rate = low; | |
77626355 BC |
1191 | |
1192 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1193 | else |
1194 | break; | |
77626355 BC |
1195 | |
1196 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1197 | } else { |
77626355 BC |
1198 | /* (2nd or later pass) |
1199 | * If we've already tried to lower the rate, and are | |
1200 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1201 | if (new_rate != IWL_RATE_INVALID) |
1202 | break; | |
77626355 BC |
1203 | |
1204 | /* Loop again with higher rate */ | |
b481de9c ZY |
1205 | else if (high != IWL_RATE_INVALID) { |
1206 | start_hi = high; | |
1207 | rate = high; | |
77626355 BC |
1208 | |
1209 | /* Higher rate not available, use the original */ | |
b481de9c ZY |
1210 | } else { |
1211 | new_rate = rate; | |
1212 | break; | |
1213 | } | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | return new_rate; | |
1218 | } | |
c8b0e6e1 | 1219 | #endif /* CONFIG_IWL4965_HT */ |
b481de9c ZY |
1220 | |
1221 | static inline u8 rs_is_both_ant_supp(u8 valid_antenna) | |
1222 | { | |
1223 | return (rs_is_ant_connected(valid_antenna, ANT_BOTH)); | |
1224 | } | |
1225 | ||
77626355 BC |
1226 | /* |
1227 | * Set up search table for MIMO | |
1228 | */ | |
bb8c093b | 1229 | static int rs_switch_to_mimo(struct iwl4965_priv *priv, |
c33104f0 | 1230 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1231 | struct ieee80211_conf *conf, |
1232 | struct sta_info *sta, | |
bb8c093b | 1233 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1234 | { |
c8b0e6e1 | 1235 | #ifdef CONFIG_IWL4965_HT |
b481de9c ZY |
1236 | u16 rate_mask; |
1237 | s32 rate; | |
c33104f0 | 1238 | s8 is_green = lq_sta->is_green; |
b481de9c | 1239 | |
270243a5 RR |
1240 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1241 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1242 | return -1; |
1243 | ||
1244 | IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); | |
1245 | tbl->lq_type = LQ_MIMO; | |
c33104f0 | 1246 | rs_get_supported_rates(lq_sta, NULL, tbl->lq_type, |
b481de9c ZY |
1247 | &rate_mask); |
1248 | ||
270243a5 | 1249 | if (priv->current_ht_config.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) |
b481de9c ZY |
1250 | return -1; |
1251 | ||
77626355 | 1252 | /* Need both Tx chains/antennas to support MIMO */ |
c33104f0 | 1253 | if (!rs_is_both_ant_supp(lq_sta->antenna)) |
b481de9c ZY |
1254 | return -1; |
1255 | ||
c33104f0 | 1256 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1257 | tbl->action = 0; |
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 | ||
1264 | if (tbl->is_fat) { | |
270243a5 | 1265 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1266 | tbl->is_SGI = 1; |
1267 | else | |
1268 | tbl->is_SGI = 0; | |
270243a5 | 1269 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1270 | tbl->is_SGI = 1; |
1271 | else | |
1272 | tbl->is_SGI = 0; | |
1273 | ||
c33104f0 | 1274 | rs_get_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1275 | |
c33104f0 | 1276 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index, index); |
b481de9c ZY |
1277 | |
1278 | IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate, rate_mask); | |
1279 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) | |
1280 | return -1; | |
1281 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
1282 | ||
1283 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
1284 | tbl->current_rate.rate_n_flags, is_green); | |
dc2453ae | 1285 | return 0; |
403ab56b MA |
1286 | #else |
1287 | return -1; | |
0c11b4de | 1288 | #endif /*CONFIG_IWL4965_HT */ |
b481de9c ZY |
1289 | } |
1290 | ||
77626355 BC |
1291 | /* |
1292 | * Set up search table for SISO | |
1293 | */ | |
bb8c093b | 1294 | static int rs_switch_to_siso(struct iwl4965_priv *priv, |
c33104f0 | 1295 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1296 | struct ieee80211_conf *conf, |
1297 | struct sta_info *sta, | |
bb8c093b | 1298 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1299 | { |
c8b0e6e1 | 1300 | #ifdef CONFIG_IWL4965_HT |
b481de9c | 1301 | u16 rate_mask; |
c33104f0 | 1302 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1303 | s32 rate; |
1304 | ||
1305 | IWL_DEBUG_HT("LQ: try to switch to SISO\n"); | |
270243a5 RR |
1306 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1307 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1308 | return -1; |
1309 | ||
c33104f0 | 1310 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1311 | tbl->lq_type = LQ_SISO; |
1312 | tbl->action = 0; | |
c33104f0 | 1313 | rs_get_supported_rates(lq_sta, NULL, tbl->lq_type, |
b481de9c ZY |
1314 | &rate_mask); |
1315 | ||
270243a5 RR |
1316 | if (priv->current_ht_config.supported_chan_width |
1317 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1318 | tbl->is_fat = 1; |
1319 | else | |
1320 | tbl->is_fat = 0; | |
1321 | ||
1322 | if (tbl->is_fat) { | |
270243a5 | 1323 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1324 | tbl->is_SGI = 1; |
1325 | else | |
1326 | tbl->is_SGI = 0; | |
270243a5 | 1327 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1328 | tbl->is_SGI = 1; |
1329 | else | |
1330 | tbl->is_SGI = 0; | |
1331 | ||
1332 | if (is_green) | |
1333 | tbl->is_SGI = 0; | |
1334 | ||
c33104f0 TW |
1335 | rs_get_expected_tpt_table(lq_sta, tbl); |
1336 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index, index); | |
b481de9c ZY |
1337 | |
1338 | IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask); | |
1339 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
1340 | IWL_DEBUG_HT("can not switch with index %d rate mask %x\n", | |
1341 | rate, rate_mask); | |
1342 | return -1; | |
1343 | } | |
1344 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
1345 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
1346 | tbl->current_rate.rate_n_flags, is_green); | |
403ab56b MA |
1347 | return 0; |
1348 | #else | |
1349 | return -1; | |
b481de9c | 1350 | |
0c11b4de | 1351 | #endif /*CONFIG_IWL4965_HT */ |
b481de9c ZY |
1352 | } |
1353 | ||
77626355 BC |
1354 | /* |
1355 | * Try to switch to new modulation mode from legacy | |
1356 | */ | |
bb8c093b | 1357 | static int rs_move_legacy_other(struct iwl4965_priv *priv, |
c33104f0 | 1358 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1359 | struct ieee80211_conf *conf, |
1360 | struct sta_info *sta, | |
b481de9c ZY |
1361 | int index) |
1362 | { | |
dc2453ae | 1363 | int ret = 0; |
bb8c093b | 1364 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1365 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1366 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1367 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1368 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1369 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1370 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c ZY |
1371 | u8 start_action = tbl->action; |
1372 | ||
1373 | for (; ;) { | |
1374 | switch (tbl->action) { | |
1375 | case IWL_LEGACY_SWITCH_ANTENNA: | |
1376 | IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); | |
1377 | ||
1378 | search_tbl->lq_type = LQ_NONE; | |
c33104f0 | 1379 | lq_sta->action_counter++; |
77626355 BC |
1380 | |
1381 | /* Don't change antenna if success has been great */ | |
b481de9c ZY |
1382 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1383 | break; | |
77626355 BC |
1384 | |
1385 | /* Don't change antenna if other one is not connected */ | |
c33104f0 | 1386 | if (!rs_is_other_ant_connected(lq_sta->antenna, |
b481de9c ZY |
1387 | tbl->antenna_type)) |
1388 | break; | |
1389 | ||
77626355 | 1390 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1391 | memcpy(search_tbl, tbl, sz); |
1392 | ||
1393 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1394 | search_tbl); | |
c33104f0 TW |
1395 | rs_get_expected_tpt_table(lq_sta, search_tbl); |
1396 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1397 | goto out; |
1398 | ||
1399 | case IWL_LEGACY_SWITCH_SISO: | |
1400 | IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); | |
77626355 BC |
1401 | |
1402 | /* Set up search table to try SISO */ | |
b481de9c ZY |
1403 | memcpy(search_tbl, tbl, sz); |
1404 | search_tbl->lq_type = LQ_SISO; | |
1405 | search_tbl->is_SGI = 0; | |
1406 | search_tbl->is_fat = 0; | |
c33104f0 | 1407 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1408 | search_tbl, index); |
dc2453ae | 1409 | if (!ret) { |
c33104f0 TW |
1410 | lq_sta->search_better_tbl = 1; |
1411 | lq_sta->action_counter = 0; | |
b481de9c | 1412 | goto out; |
dc2453ae | 1413 | } |
b481de9c ZY |
1414 | |
1415 | break; | |
1416 | case IWL_LEGACY_SWITCH_MIMO: | |
1417 | IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); | |
77626355 BC |
1418 | |
1419 | /* Set up search table to try MIMO */ | |
b481de9c ZY |
1420 | memcpy(search_tbl, tbl, sz); |
1421 | search_tbl->lq_type = LQ_MIMO; | |
1422 | search_tbl->is_SGI = 0; | |
1423 | search_tbl->is_fat = 0; | |
1424 | search_tbl->antenna_type = ANT_BOTH; | |
c33104f0 | 1425 | ret = rs_switch_to_mimo(priv, lq_sta, conf, sta, |
270243a5 | 1426 | search_tbl, index); |
dc2453ae | 1427 | if (!ret) { |
c33104f0 TW |
1428 | lq_sta->search_better_tbl = 1; |
1429 | lq_sta->action_counter = 0; | |
b481de9c | 1430 | goto out; |
dc2453ae | 1431 | } |
b481de9c ZY |
1432 | break; |
1433 | } | |
1434 | tbl->action++; | |
1435 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1436 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1437 | ||
1438 | if (tbl->action == start_action) | |
1439 | break; | |
1440 | ||
1441 | } | |
1442 | return 0; | |
1443 | ||
1444 | out: | |
1445 | tbl->action++; | |
1446 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1447 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1448 | return 0; | |
1449 | ||
1450 | } | |
1451 | ||
77626355 BC |
1452 | /* |
1453 | * Try to switch to new modulation mode from SISO | |
1454 | */ | |
bb8c093b | 1455 | static int rs_move_siso_to_other(struct iwl4965_priv *priv, |
c33104f0 | 1456 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1457 | struct ieee80211_conf *conf, |
1458 | struct sta_info *sta, | |
b481de9c ZY |
1459 | int index) |
1460 | { | |
dc2453ae | 1461 | int ret; |
c33104f0 | 1462 | u8 is_green = lq_sta->is_green; |
bb8c093b | 1463 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1464 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1465 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1466 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1467 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1468 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1469 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c ZY |
1470 | u8 start_action = tbl->action; |
1471 | ||
1472 | for (;;) { | |
c33104f0 | 1473 | lq_sta->action_counter++; |
b481de9c ZY |
1474 | switch (tbl->action) { |
1475 | case IWL_SISO_SWITCH_ANTENNA: | |
1476 | IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n"); | |
1477 | search_tbl->lq_type = LQ_NONE; | |
1478 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1479 | break; | |
c33104f0 | 1480 | if (!rs_is_other_ant_connected(lq_sta->antenna, |
b481de9c ZY |
1481 | tbl->antenna_type)) |
1482 | break; | |
1483 | ||
1484 | memcpy(search_tbl, tbl, sz); | |
1485 | search_tbl->action = IWL_SISO_SWITCH_MIMO; | |
1486 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1487 | search_tbl); | |
c33104f0 | 1488 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1489 | |
1490 | goto out; | |
1491 | ||
1492 | case IWL_SISO_SWITCH_MIMO: | |
1493 | IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n"); | |
1494 | memcpy(search_tbl, tbl, sz); | |
1495 | search_tbl->lq_type = LQ_MIMO; | |
1496 | search_tbl->is_SGI = 0; | |
1497 | search_tbl->is_fat = 0; | |
1498 | search_tbl->antenna_type = ANT_BOTH; | |
c33104f0 | 1499 | ret = rs_switch_to_mimo(priv, lq_sta, conf, sta, |
270243a5 | 1500 | search_tbl, index); |
dc2453ae | 1501 | if (!ret) { |
c33104f0 | 1502 | lq_sta->search_better_tbl = 1; |
b481de9c | 1503 | goto out; |
dc2453ae | 1504 | } |
b481de9c ZY |
1505 | break; |
1506 | case IWL_SISO_SWITCH_GI: | |
1507 | IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); | |
0c11b4de | 1508 | |
b481de9c ZY |
1509 | memcpy(search_tbl, tbl, sz); |
1510 | search_tbl->action = 0; | |
1511 | if (search_tbl->is_SGI) | |
1512 | search_tbl->is_SGI = 0; | |
1513 | else if (!is_green) | |
1514 | search_tbl->is_SGI = 1; | |
1515 | else | |
1516 | break; | |
c33104f0 | 1517 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1518 | if ((tbl->lq_type == LQ_SISO) && |
1519 | (tbl->is_SGI)) { | |
c33104f0 | 1520 | s32 tpt = lq_sta->last_tpt / 100; |
b481de9c ZY |
1521 | if (((!tbl->is_fat) && |
1522 | (tpt >= expected_tpt_siso20MHz[index])) || | |
1523 | ((tbl->is_fat) && | |
1524 | (tpt >= expected_tpt_siso40MHz[index]))) | |
c33104f0 | 1525 | lq_sta->search_better_tbl = 0; |
b481de9c | 1526 | } |
c33104f0 | 1527 | rs_get_expected_tpt_table(lq_sta, search_tbl); |
b481de9c ZY |
1528 | rs_mcs_from_tbl(&search_tbl->current_rate, |
1529 | search_tbl, index, is_green); | |
1530 | goto out; | |
1531 | } | |
1532 | tbl->action++; | |
1533 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1534 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1535 | ||
1536 | if (tbl->action == start_action) | |
1537 | break; | |
1538 | } | |
1539 | return 0; | |
1540 | ||
1541 | out: | |
1542 | tbl->action++; | |
1543 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1544 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1545 | return 0; | |
1546 | } | |
1547 | ||
77626355 BC |
1548 | /* |
1549 | * Try to switch to new modulation mode from MIMO | |
1550 | */ | |
bb8c093b | 1551 | static int rs_move_mimo_to_other(struct iwl4965_priv *priv, |
c33104f0 | 1552 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1553 | struct ieee80211_conf *conf, |
1554 | struct sta_info *sta, | |
b481de9c ZY |
1555 | int index) |
1556 | { | |
dc2453ae | 1557 | int ret; |
c33104f0 | 1558 | s8 is_green = lq_sta->is_green; |
bb8c093b | 1559 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1560 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1561 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1562 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1563 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - |
1564 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c ZY |
1565 | u8 start_action = tbl->action; |
1566 | ||
1567 | for (;;) { | |
c33104f0 | 1568 | lq_sta->action_counter++; |
b481de9c ZY |
1569 | switch (tbl->action) { |
1570 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1571 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
1572 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n"); | |
77626355 | 1573 | |
0c11b4de | 1574 | |
77626355 | 1575 | /* Set up new search table for SISO */ |
b481de9c ZY |
1576 | memcpy(search_tbl, tbl, sz); |
1577 | search_tbl->lq_type = LQ_SISO; | |
1578 | search_tbl->is_SGI = 0; | |
1579 | search_tbl->is_fat = 0; | |
1580 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) | |
1581 | search_tbl->antenna_type = ANT_MAIN; | |
1582 | else | |
1583 | search_tbl->antenna_type = ANT_AUX; | |
1584 | ||
c33104f0 | 1585 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1586 | search_tbl, index); |
dc2453ae | 1587 | if (!ret) { |
c33104f0 | 1588 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1589 | goto out; |
1590 | } | |
1591 | break; | |
1592 | ||
1593 | case IWL_MIMO_SWITCH_GI: | |
1594 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); | |
77626355 BC |
1595 | |
1596 | /* Set up new search table for MIMO */ | |
b481de9c ZY |
1597 | memcpy(search_tbl, tbl, sz); |
1598 | search_tbl->lq_type = LQ_MIMO; | |
1599 | search_tbl->antenna_type = ANT_BOTH; | |
1600 | search_tbl->action = 0; | |
1601 | if (search_tbl->is_SGI) | |
1602 | search_tbl->is_SGI = 0; | |
1603 | else | |
1604 | search_tbl->is_SGI = 1; | |
c33104f0 | 1605 | lq_sta->search_better_tbl = 1; |
77626355 BC |
1606 | |
1607 | /* | |
1608 | * If active table already uses the fastest possible | |
1609 | * modulation (dual stream with short guard interval), | |
1610 | * and it's working well, there's no need to look | |
1611 | * for a better type of modulation! | |
1612 | */ | |
b481de9c ZY |
1613 | if ((tbl->lq_type == LQ_MIMO) && |
1614 | (tbl->is_SGI)) { | |
c33104f0 | 1615 | s32 tpt = lq_sta->last_tpt / 100; |
b481de9c ZY |
1616 | if (((!tbl->is_fat) && |
1617 | (tpt >= expected_tpt_mimo20MHz[index])) || | |
1618 | ((tbl->is_fat) && | |
1619 | (tpt >= expected_tpt_mimo40MHz[index]))) | |
c33104f0 | 1620 | lq_sta->search_better_tbl = 0; |
b481de9c | 1621 | } |
c33104f0 | 1622 | rs_get_expected_tpt_table(lq_sta, search_tbl); |
b481de9c ZY |
1623 | rs_mcs_from_tbl(&search_tbl->current_rate, |
1624 | search_tbl, index, is_green); | |
1625 | goto out; | |
1626 | ||
1627 | } | |
1628 | tbl->action++; | |
1629 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1630 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1631 | ||
1632 | if (tbl->action == start_action) | |
1633 | break; | |
1634 | } | |
1635 | ||
1636 | return 0; | |
1637 | out: | |
1638 | tbl->action++; | |
1639 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1640 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1641 | return 0; | |
1642 | ||
1643 | } | |
1644 | ||
77626355 BC |
1645 | /* |
1646 | * Check whether we should continue using same modulation mode, or | |
1647 | * begin search for a new mode, based on: | |
1648 | * 1) # tx successes or failures while using this mode | |
1649 | * 2) # times calling this function | |
1650 | * 3) elapsed time in this mode (not used, for now) | |
1651 | */ | |
c33104f0 | 1652 | static void rs_stay_in_table(struct iwl4965_lq_sta *lq_sta) |
b481de9c | 1653 | { |
bb8c093b | 1654 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c ZY |
1655 | int i; |
1656 | int active_tbl; | |
1657 | int flush_interval_passed = 0; | |
1658 | ||
c33104f0 | 1659 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1660 | |
c33104f0 | 1661 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1662 | |
77626355 | 1663 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1664 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1665 | |
77626355 | 1666 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1667 | if (lq_sta->flush_timer) |
b481de9c ZY |
1668 | flush_interval_passed = |
1669 | time_after(jiffies, | |
c33104f0 | 1670 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1671 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1672 | ||
77626355 | 1673 | /* For now, disable the elapsed time criterion */ |
b481de9c | 1674 | flush_interval_passed = 0; |
77626355 BC |
1675 | |
1676 | /* | |
1677 | * Check if we should allow search for new modulation mode. | |
1678 | * If many frames have failed or succeeded, or we've used | |
1679 | * this same modulation for a long time, allow search, and | |
1680 | * reset history stats that keep track of whether we should | |
1681 | * allow a new search. Also (below) reset all bitmaps and | |
1682 | * stats in active history. | |
1683 | */ | |
c33104f0 TW |
1684 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1685 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1686 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c ZY |
1687 | && (flush_interval_passed))) { |
1688 | IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:", | |
c33104f0 TW |
1689 | lq_sta->total_failed, |
1690 | lq_sta->total_success, | |
b481de9c | 1691 | flush_interval_passed); |
77626355 BC |
1692 | |
1693 | /* Allow search for new mode */ | |
c33104f0 TW |
1694 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1695 | lq_sta->total_failed = 0; | |
1696 | lq_sta->total_success = 0; | |
1697 | lq_sta->flush_timer = 0; | |
77626355 BC |
1698 | |
1699 | /* | |
1700 | * Else if we've used this modulation mode enough repetitions | |
1701 | * (regardless of elapsed time or success/failure), reset | |
1702 | * history bitmaps and rate-specific stats for all rates in | |
1703 | * active table. | |
1704 | */ | |
403ab56b | 1705 | } else { |
c33104f0 TW |
1706 | lq_sta->table_count++; |
1707 | if (lq_sta->table_count >= | |
1708 | lq_sta->table_count_limit) { | |
1709 | lq_sta->table_count = 0; | |
b481de9c ZY |
1710 | |
1711 | IWL_DEBUG_HT("LQ: stay in table clear win\n"); | |
1712 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1713 | rs_rate_scale_clear_window( | |
1714 | &(tbl->win[i])); | |
1715 | } | |
1716 | } | |
1717 | ||
77626355 BC |
1718 | /* If transitioning to allow "search", reset all history |
1719 | * bitmaps and stats in active table (this will become the new | |
1720 | * "search" table). */ | |
c33104f0 | 1721 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1722 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1723 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1724 | } | |
1725 | } | |
1726 | } | |
1727 | ||
77626355 BC |
1728 | /* |
1729 | * Do rate scaling and search for new modulation mode. | |
1730 | */ | |
bb8c093b | 1731 | static void rs_rate_scale_perform(struct iwl4965_priv *priv, |
b481de9c ZY |
1732 | struct net_device *dev, |
1733 | struct ieee80211_hdr *hdr, | |
1734 | struct sta_info *sta) | |
1735 | { | |
270243a5 RR |
1736 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
1737 | struct ieee80211_hw *hw = local_to_hw(local); | |
1738 | struct ieee80211_conf *conf = &hw->conf; | |
b481de9c ZY |
1739 | int low = IWL_RATE_INVALID; |
1740 | int high = IWL_RATE_INVALID; | |
1741 | int index; | |
1742 | int i; | |
bb8c093b | 1743 | struct iwl4965_rate_scale_data *window = NULL; |
b481de9c ZY |
1744 | int current_tpt = IWL_INVALID_VALUE; |
1745 | int low_tpt = IWL_INVALID_VALUE; | |
1746 | int high_tpt = IWL_INVALID_VALUE; | |
1747 | u32 fail_count; | |
1748 | s8 scale_action = 0; | |
1749 | u16 fc, rate_mask; | |
1750 | u8 update_lq = 0; | |
c33104f0 | 1751 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 1752 | struct iwl4965_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1753 | u16 rate_scale_index_msk = 0; |
bb8c093b | 1754 | struct iwl4965_rate mcs_rate; |
b481de9c ZY |
1755 | u8 is_green = 0; |
1756 | u8 active_tbl = 0; | |
1757 | u8 done_search = 0; | |
1758 | u16 high_low; | |
0c11b4de RR |
1759 | #ifdef CONFIG_IWL4965_HT |
1760 | u8 tid = MAX_TID_COUNT; | |
1761 | __le16 *qc; | |
1762 | #endif | |
b481de9c ZY |
1763 | |
1764 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1765 | ||
1766 | fc = le16_to_cpu(hdr->frame_control); | |
1767 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1768 | /* Send management frames and broadcast/multicast data using | |
1769 | * lowest rate. */ | |
1770 | /* TODO: this could probably be improved.. */ | |
1771 | return; | |
1772 | } | |
1773 | ||
1774 | if (!sta || !sta->rate_ctrl_priv) | |
1775 | return; | |
1776 | ||
1777 | if (!priv->lq_mngr.lq_ready) { | |
1778 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1779 | return; | |
1780 | } | |
c33104f0 | 1781 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c | 1782 | |
0c11b4de RR |
1783 | #ifdef CONFIG_IWL4965_HT |
1784 | qc = ieee80211_get_qos_ctrl(hdr); | |
1785 | if (qc) { | |
1786 | tid = (u8)(le16_to_cpu(*qc) & 0xf); | |
1787 | rs_tl_add_packet(lq_sta, tid); | |
1788 | } | |
1789 | #endif | |
77626355 BC |
1790 | /* |
1791 | * Select rate-scale / modulation-mode table to work with in | |
1792 | * the rest of this function: "search" if searching for better | |
1793 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1794 | */ | |
c33104f0 TW |
1795 | if (!lq_sta->search_better_tbl) |
1796 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1797 | else |
c33104f0 | 1798 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1799 | |
c33104f0 TW |
1800 | tbl = &(lq_sta->lq_info[active_tbl]); |
1801 | is_green = lq_sta->is_green; | |
b481de9c | 1802 | |
77626355 | 1803 | /* current tx rate */ |
8318d78a | 1804 | index = sta->last_txrate_idx; |
b481de9c ZY |
1805 | |
1806 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1807 | tbl->lq_type); | |
1808 | ||
77626355 | 1809 | /* rates available for this association, and for modulation mode */ |
c33104f0 | 1810 | rs_get_supported_rates(lq_sta, hdr, tbl->lq_type, |
b481de9c ZY |
1811 | &rate_mask); |
1812 | ||
1813 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1814 | ||
1815 | /* mask with station rate restriction */ | |
1816 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1817 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1818 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1819 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1820 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1821 | else |
1822 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1823 | lq_sta->supp_rates); |
b481de9c ZY |
1824 | |
1825 | } else | |
1826 | rate_scale_index_msk = rate_mask; | |
1827 | ||
1828 | if (!rate_scale_index_msk) | |
1829 | rate_scale_index_msk = rate_mask; | |
1830 | ||
77626355 BC |
1831 | /* If current rate is no longer supported on current association, |
1832 | * or user changed preferences for rates, find a new supported rate. */ | |
b481de9c ZY |
1833 | if (index < 0 || !((1 << index) & rate_scale_index_msk)) { |
1834 | index = IWL_INVALID_VALUE; | |
1835 | update_lq = 1; | |
1836 | ||
77626355 | 1837 | /* get the highest available rate */ |
b481de9c ZY |
1838 | for (i = 0; i <= IWL_RATE_COUNT; i++) { |
1839 | if ((1 << i) & rate_scale_index_msk) | |
1840 | index = i; | |
1841 | } | |
1842 | ||
1843 | if (index == IWL_INVALID_VALUE) { | |
1844 | IWL_WARNING("Can not find a suitable rate\n"); | |
1845 | return; | |
1846 | } | |
1847 | } | |
1848 | ||
77626355 | 1849 | /* Get expected throughput table and history window for current rate */ |
b481de9c | 1850 | if (!tbl->expected_tpt) |
c33104f0 | 1851 | rs_get_expected_tpt_table(lq_sta, tbl); |
b481de9c ZY |
1852 | |
1853 | window = &(tbl->win[index]); | |
1854 | ||
77626355 BC |
1855 | /* |
1856 | * If there is not enough history to calculate actual average | |
1857 | * throughput, keep analyzing results of more tx frames, without | |
1858 | * changing rate or mode (bypass most of the rest of this function). | |
1859 | * Set up new rate table in uCode only if old rate is not supported | |
1860 | * in current association (use new rate found above). | |
1861 | */ | |
b481de9c ZY |
1862 | fail_count = window->counter - window->success_counter; |
1863 | if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && | |
1864 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) | |
1865 | || (tbl->expected_tpt == NULL)) { | |
1866 | IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " | |
1867 | "for index %d\n", | |
1868 | window->success_counter, window->counter, index); | |
77626355 BC |
1869 | |
1870 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1871 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1872 | |
1873 | /* Should we stay with this modulation mode, | |
1874 | * or search for a new one? */ | |
c33104f0 | 1875 | rs_stay_in_table(lq_sta); |
77626355 BC |
1876 | |
1877 | /* Set up new rate table in uCode, if needed */ | |
b481de9c ZY |
1878 | if (update_lq) { |
1879 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
c33104f0 TW |
1880 | rs_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq); |
1881 | rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
b481de9c ZY |
1882 | } |
1883 | goto out; | |
1884 | ||
77626355 BC |
1885 | /* Else we have enough samples; calculate estimate of |
1886 | * actual average throughput */ | |
b481de9c ZY |
1887 | } else |
1888 | window->average_tpt = ((window->success_ratio * | |
1889 | tbl->expected_tpt[index] + 64) / 128); | |
1890 | ||
77626355 | 1891 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1892 | if (lq_sta->search_better_tbl) { |
b481de9c ZY |
1893 | int success_limit = IWL_RATE_SCALE_SWITCH; |
1894 | ||
77626355 BC |
1895 | /* If good success, continue using the "search" mode; |
1896 | * no need to send new link quality command, since we're | |
1897 | * continuing to use the setup that we've been trying. */ | |
b481de9c | 1898 | if ((window->success_ratio > success_limit) || |
c33104f0 | 1899 | (window->average_tpt > lq_sta->last_tpt)) { |
b481de9c ZY |
1900 | if (!is_legacy(tbl->lq_type)) { |
1901 | IWL_DEBUG_HT("LQ: we are switching to HT" | |
1902 | " rate suc %d current tpt %d" | |
1903 | " old tpt %d\n", | |
1904 | window->success_ratio, | |
1905 | window->average_tpt, | |
c33104f0 TW |
1906 | lq_sta->last_tpt); |
1907 | lq_sta->enable_counter = 1; | |
b481de9c | 1908 | } |
77626355 | 1909 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1910 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1911 | current_tpt = window->average_tpt; |
77626355 BC |
1912 | |
1913 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1914 | } else { |
77626355 | 1915 | /* Nullify "search" table */ |
b481de9c | 1916 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1917 | |
1918 | /* Revert to "active" table */ | |
c33104f0 TW |
1919 | active_tbl = lq_sta->active_tbl; |
1920 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1921 | |
77626355 | 1922 | /* Revert to "active" rate and throughput info */ |
17744ff6 | 1923 | index = iwl4965_hwrate_to_plcp_idx( |
b481de9c | 1924 | tbl->current_rate.rate_n_flags); |
c33104f0 | 1925 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1926 | |
77626355 | 1927 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1928 | update_lq = 1; |
b481de9c ZY |
1929 | IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n"); |
1930 | } | |
77626355 BC |
1931 | |
1932 | /* Either way, we've made a decision; modulation mode | |
1933 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1934 | lq_sta->search_better_tbl = 0; |
77626355 | 1935 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1936 | goto lq_update; |
1937 | } | |
1938 | ||
77626355 BC |
1939 | /* (Else) not in search of better modulation mode, try for better |
1940 | * starting rate, while staying in this mode. */ | |
b481de9c ZY |
1941 | high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, |
1942 | tbl->lq_type); | |
1943 | low = high_low & 0xff; | |
1944 | high = (high_low >> 8) & 0xff; | |
1945 | ||
77626355 | 1946 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1947 | current_tpt = window->average_tpt; |
b481de9c ZY |
1948 | if (low != IWL_RATE_INVALID) |
1949 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1950 | if (high != IWL_RATE_INVALID) |
1951 | high_tpt = tbl->win[high].average_tpt; | |
1952 | ||
77626355 | 1953 | /* Assume rate increase */ |
b481de9c ZY |
1954 | scale_action = 1; |
1955 | ||
77626355 | 1956 | /* Too many failures, decrease rate */ |
b481de9c ZY |
1957 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || |
1958 | (current_tpt == 0)) { | |
1959 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); | |
1960 | scale_action = -1; | |
77626355 BC |
1961 | |
1962 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c ZY |
1963 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
1964 | (high_tpt == IWL_INVALID_VALUE)) | |
1965 | scale_action = 1; | |
77626355 BC |
1966 | |
1967 | /* Both adjacent throughputs are measured, but neither one has better | |
1968 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1969 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1970 | (high_tpt != IWL_INVALID_VALUE) && | |
1971 | (low_tpt < current_tpt) && | |
1972 | (high_tpt < current_tpt)) | |
1973 | scale_action = 0; | |
77626355 BC |
1974 | |
1975 | /* At least one adjacent rate's throughput is measured, | |
1976 | * and may have better performance. */ | |
b481de9c | 1977 | else { |
77626355 | 1978 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1979 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1980 | /* Higher rate has better throughput */ |
b481de9c ZY |
1981 | if (high_tpt > current_tpt) |
1982 | scale_action = 1; | |
1983 | else { | |
1984 | IWL_DEBUG_RATE | |
1985 | ("decrease rate because of high tpt\n"); | |
1986 | scale_action = -1; | |
1987 | } | |
77626355 BC |
1988 | |
1989 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1990 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1991 | /* Lower rate has better throughput */ |
b481de9c ZY |
1992 | if (low_tpt > current_tpt) { |
1993 | IWL_DEBUG_RATE | |
1994 | ("decrease rate because of low tpt\n"); | |
1995 | scale_action = -1; | |
1996 | } else | |
1997 | scale_action = 1; | |
1998 | } | |
1999 | } | |
2000 | ||
77626355 BC |
2001 | /* Sanity check; asked for decrease, but success rate or throughput |
2002 | * has been good at old rate. Don't change it. */ | |
b481de9c ZY |
2003 | if (scale_action == -1) { |
2004 | if ((low != IWL_RATE_INVALID) && | |
2005 | ((window->success_ratio > IWL_RATE_HIGH_TH) || | |
2006 | (current_tpt > (100 * tbl->expected_tpt[low])))) | |
2007 | scale_action = 0; | |
77626355 BC |
2008 | |
2009 | /* Sanity check; asked for increase, but success rate has not been great | |
2010 | * even at old rate, higher rate will be worse. Don't change it. */ | |
b481de9c ZY |
2011 | } else if ((scale_action == 1) && |
2012 | (window->success_ratio < IWL_RATE_INCREASE_TH)) | |
2013 | scale_action = 0; | |
2014 | ||
2015 | switch (scale_action) { | |
2016 | case -1: | |
77626355 | 2017 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
2018 | if (low != IWL_RATE_INVALID) { |
2019 | update_lq = 1; | |
2020 | index = low; | |
2021 | } | |
2022 | break; | |
2023 | case 1: | |
77626355 | 2024 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
2025 | if (high != IWL_RATE_INVALID) { |
2026 | update_lq = 1; | |
2027 | index = high; | |
2028 | } | |
2029 | ||
2030 | break; | |
2031 | case 0: | |
77626355 | 2032 | /* No change */ |
b481de9c ZY |
2033 | default: |
2034 | break; | |
2035 | } | |
2036 | ||
2037 | IWL_DEBUG_HT("choose rate scale index %d action %d low %d " | |
2038 | "high %d type %d\n", | |
2039 | index, scale_action, low, high, tbl->lq_type); | |
2040 | ||
2041 | lq_update: | |
77626355 | 2042 | /* Replace uCode's rate table for the destination station. */ |
b481de9c ZY |
2043 | if (update_lq) { |
2044 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
c33104f0 TW |
2045 | rs_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq); |
2046 | rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
b481de9c | 2047 | } |
77626355 BC |
2048 | |
2049 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 2050 | rs_stay_in_table(lq_sta); |
b481de9c | 2051 | |
77626355 BC |
2052 | /* |
2053 | * Search for new modulation mode if we're: | |
2054 | * 1) Not changing rates right now | |
2055 | * 2) Not just finishing up a search | |
2056 | * 3) Allowing a new search | |
2057 | */ | |
c33104f0 | 2058 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl) { |
77626355 | 2059 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 2060 | lq_sta->last_tpt = current_tpt; |
b481de9c | 2061 | |
77626355 BC |
2062 | /* Select a new "search" modulation mode to try. |
2063 | * If one is found, set up the new "search" table. */ | |
b481de9c | 2064 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 2065 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2066 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 2067 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2068 | else |
c33104f0 | 2069 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2070 | |
77626355 | 2071 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2072 | if (lq_sta->search_better_tbl) { |
77626355 | 2073 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2074 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2075 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2076 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2077 | ||
77626355 | 2078 | /* Use new "search" start rate */ |
17744ff6 | 2079 | index = iwl4965_hwrate_to_plcp_idx( |
b481de9c ZY |
2080 | tbl->current_rate.rate_n_flags); |
2081 | ||
2082 | IWL_DEBUG_HT("Switch current mcs: %X index: %d\n", | |
2083 | tbl->current_rate.rate_n_flags, index); | |
c33104f0 TW |
2084 | rs_fill_link_cmd(lq_sta, &tbl->current_rate, |
2085 | &lq_sta->lq); | |
2086 | rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
b481de9c | 2087 | } |
b481de9c | 2088 | |
77626355 BC |
2089 | /* If the "active" (non-search) mode was legacy, |
2090 | * and we've tried switching antennas, | |
2091 | * but we haven't been able to try HT modes (not available), | |
2092 | * stay with best antenna legacy modulation for a while | |
2093 | * before next round of mode comparisons. */ | |
c33104f0 | 2094 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 2095 | if (is_legacy(tbl1->lq_type) && |
c8b0e6e1 | 2096 | #ifdef CONFIG_IWL4965_HT |
270243a5 | 2097 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
b481de9c | 2098 | #endif |
c33104f0 TW |
2099 | (lq_sta->action_counter >= 1)) { |
2100 | lq_sta->action_counter = 0; | |
b481de9c | 2101 | IWL_DEBUG_HT("LQ: STAY in legacy table\n"); |
c33104f0 | 2102 | rs_set_stay_in_table(1, lq_sta); |
b481de9c ZY |
2103 | } |
2104 | ||
77626355 BC |
2105 | /* If we're in an HT mode, and all 3 mode switch actions |
2106 | * have been tried and compared, stay in this best modulation | |
2107 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2108 | if (lq_sta->enable_counter && |
2109 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2110 | #ifdef CONFIG_IWL4965_HT |
2111 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && | |
2112 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2113 | (tid != MAX_TID_COUNT)) { | |
2114 | IWL_DEBUG_HT("try to aggregate tid %d\n", tid); | |
2115 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); | |
b481de9c | 2116 | } |
0c11b4de | 2117 | #endif /*CONFIG_IWL4965_HT */ |
c33104f0 TW |
2118 | lq_sta->action_counter = 0; |
2119 | rs_set_stay_in_table(0, lq_sta); | |
b481de9c | 2120 | } |
77626355 BC |
2121 | |
2122 | /* | |
2123 | * Else, don't search for a new modulation mode. | |
2124 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2125 | * 1) Not changing rates right now | |
2126 | * 2) Not just finishing up a search | |
2127 | * 3) flush timer is empty | |
2128 | */ | |
b481de9c | 2129 | } else { |
c33104f0 TW |
2130 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2131 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2132 | } |
2133 | ||
2134 | out: | |
2135 | rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green); | |
2136 | i = index; | |
8318d78a | 2137 | sta->last_txrate_idx = i; |
b481de9c | 2138 | |
8318d78a | 2139 | /* sta->txrate_idx is an index to A mode rates which start |
b481de9c ZY |
2140 | * at IWL_FIRST_OFDM_RATE |
2141 | */ | |
8318d78a JB |
2142 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
2143 | sta->txrate_idx = i - IWL_FIRST_OFDM_RATE; | |
b481de9c | 2144 | else |
8318d78a | 2145 | sta->txrate_idx = i; |
b481de9c ZY |
2146 | |
2147 | return; | |
2148 | } | |
2149 | ||
2150 | ||
bb8c093b | 2151 | static void rs_initialize_lq(struct iwl4965_priv *priv, |
270243a5 | 2152 | struct ieee80211_conf *conf, |
b481de9c ZY |
2153 | struct sta_info *sta) |
2154 | { | |
2155 | int i; | |
c33104f0 | 2156 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 2157 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c ZY |
2158 | u8 active_tbl = 0; |
2159 | int rate_idx; | |
270243a5 | 2160 | u8 use_green = rs_use_green(priv, conf); |
bb8c093b | 2161 | struct iwl4965_rate mcs_rate; |
b481de9c ZY |
2162 | |
2163 | if (!sta || !sta->rate_ctrl_priv) | |
2164 | goto out; | |
2165 | ||
c33104f0 | 2166 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2167 | i = sta->last_txrate_idx; |
b481de9c | 2168 | |
c33104f0 | 2169 | if ((lq_sta->lq.sta_id == 0xff) && |
b481de9c ZY |
2170 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
2171 | goto out; | |
2172 | ||
c33104f0 TW |
2173 | if (!lq_sta->search_better_tbl) |
2174 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2175 | else |
c33104f0 | 2176 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2177 | |
c33104f0 | 2178 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2179 | |
2180 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2181 | i = 0; | |
2182 | ||
bb8c093b | 2183 | mcs_rate.rate_n_flags = iwl4965_rates[i].plcp ; |
b481de9c ZY |
2184 | mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; |
2185 | mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
2186 | ||
2187 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
2188 | mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK; | |
2189 | ||
2190 | tbl->antenna_type = ANT_AUX; | |
8318d78a | 2191 | rs_get_tbl_info_from_mcs(&mcs_rate, priv->band, tbl, &rate_idx); |
b481de9c | 2192 | if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type)) |
46640a8c | 2193 | rs_toggle_antenna(&mcs_rate, tbl); |
b481de9c ZY |
2194 | |
2195 | rs_mcs_from_tbl(&mcs_rate, tbl, rate_idx, use_green); | |
2196 | tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags; | |
c33104f0 TW |
2197 | rs_get_expected_tpt_table(lq_sta, tbl); |
2198 | rs_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq); | |
2199 | rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
b481de9c ZY |
2200 | out: |
2201 | return; | |
2202 | } | |
2203 | ||
1abbe498 | 2204 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
8318d78a JB |
2205 | struct ieee80211_supported_band *sband, |
2206 | struct sk_buff *skb, | |
1abbe498 | 2207 | struct rate_selection *sel) |
b481de9c ZY |
2208 | { |
2209 | ||
2210 | int i; | |
2211 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
270243a5 | 2212 | struct ieee80211_conf *conf = &local->hw.conf; |
b481de9c ZY |
2213 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2214 | struct sta_info *sta; | |
2bc454b0 | 2215 | u16 fc; |
bb8c093b | 2216 | struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; |
c33104f0 | 2217 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2218 | |
58826351 | 2219 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2220 | |
d0709a65 JB |
2221 | rcu_read_lock(); |
2222 | ||
b481de9c ZY |
2223 | sta = sta_info_get(local, hdr->addr1); |
2224 | ||
2bc454b0 MW |
2225 | /* Send management frames and broadcast/multicast data using lowest |
2226 | * rate. */ | |
2227 | fc = le16_to_cpu(hdr->frame_control); | |
2228 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || | |
2229 | !sta || !sta->rate_ctrl_priv) { | |
8318d78a | 2230 | sel->rate = rate_lowest(local, sband, sta); |
f4d6082d | 2231 | goto out; |
b481de9c ZY |
2232 | } |
2233 | ||
c33104f0 | 2234 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2235 | i = sta->last_txrate_idx; |
b481de9c | 2236 | |
c33104f0 TW |
2237 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
2238 | !lq_sta->ibss_sta_added) { | |
bb8c093b | 2239 | u8 sta_id = iwl4965_hw_find_station(priv, hdr->addr1); |
0795af57 | 2240 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
2241 | |
2242 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2243 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2244 | print_mac(mac, hdr->addr1)); | |
67d62035 RR |
2245 | sta_id = iwl4965_add_station_flags(priv, hdr->addr1, |
2246 | 0, CMD_ASYNC, NULL); | |
b481de9c ZY |
2247 | } |
2248 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2249 | lq_sta->lq.sta_id = sta_id; |
2250 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2251 | lq_sta->ibss_sta_added = 1; | |
270243a5 | 2252 | rs_initialize_lq(priv, conf, sta); |
b481de9c | 2253 | } |
c33104f0 | 2254 | if (!lq_sta->ibss_sta_added) |
b481de9c ZY |
2255 | goto done; |
2256 | } | |
2257 | ||
f4d6082d | 2258 | done: |
1abbe498 | 2259 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
8318d78a | 2260 | sel->rate = rate_lowest(local, sband, sta); |
f4d6082d | 2261 | goto out; |
1abbe498 | 2262 | } |
b481de9c | 2263 | |
1abbe498 | 2264 | sel->rate = &priv->ieee_rates[i]; |
f4d6082d TW |
2265 | out: |
2266 | rcu_read_unlock(); | |
b481de9c ZY |
2267 | } |
2268 | ||
2269 | static void *rs_alloc_sta(void *priv, gfp_t gfp) | |
2270 | { | |
c33104f0 | 2271 | struct iwl4965_lq_sta *lq_sta; |
b481de9c ZY |
2272 | int i, j; |
2273 | ||
2274 | IWL_DEBUG_RATE("create station rate scale window\n"); | |
2275 | ||
c33104f0 | 2276 | lq_sta = kzalloc(sizeof(struct iwl4965_lq_sta), gfp); |
b481de9c | 2277 | |
c33104f0 | 2278 | if (lq_sta == NULL) |
b481de9c | 2279 | return NULL; |
c33104f0 | 2280 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2281 | |
63fddb9f | 2282 | |
b481de9c ZY |
2283 | for (j = 0; j < LQ_SIZE; j++) |
2284 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2285 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c | 2286 | |
c33104f0 | 2287 | return lq_sta; |
b481de9c ZY |
2288 | } |
2289 | ||
2290 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
2291 | struct ieee80211_local *local, | |
2292 | struct sta_info *sta) | |
2293 | { | |
2294 | int i, j; | |
270243a5 | 2295 | struct ieee80211_conf *conf = &local->hw.conf; |
8318d78a | 2296 | struct ieee80211_supported_band *sband; |
bb8c093b | 2297 | struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; |
c33104f0 | 2298 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
b481de9c | 2299 | |
8318d78a JB |
2300 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
2301 | ||
c33104f0 | 2302 | lq_sta->flush_timer = 0; |
8318d78a JB |
2303 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
2304 | sta->txrate_idx = 3; | |
b481de9c ZY |
2305 | for (j = 0; j < LQ_SIZE; j++) |
2306 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2307 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c ZY |
2308 | |
2309 | IWL_DEBUG_RATE("rate scale global init\n"); | |
2310 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
2311 | * the lowest or the highest rate.. Could consider using RSSI from | |
2312 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2313 | * after assoc.. */ | |
2314 | ||
c33104f0 | 2315 | lq_sta->ibss_sta_added = 0; |
b481de9c | 2316 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { |
bb8c093b | 2317 | u8 sta_id = iwl4965_hw_find_station(priv, sta->addr); |
0795af57 JP |
2318 | DECLARE_MAC_BUF(mac); |
2319 | ||
b481de9c | 2320 | /* for IBSS the call are from tasklet */ |
0795af57 JP |
2321 | IWL_DEBUG_HT("LQ: ADD station %s\n", |
2322 | print_mac(mac, sta->addr)); | |
b481de9c ZY |
2323 | |
2324 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2325 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2326 | print_mac(mac, sta->addr)); | |
67d62035 RR |
2327 | sta_id = iwl4965_add_station_flags(priv, sta->addr, |
2328 | 0, CMD_ASYNC, NULL); | |
b481de9c ZY |
2329 | } |
2330 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2331 | lq_sta->lq.sta_id = sta_id; |
2332 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2333 | } |
2334 | /* FIXME: this is w/a remove it later */ | |
2335 | priv->assoc_station_added = 1; | |
2336 | } | |
2337 | ||
77626355 | 2338 | /* Find highest tx rate supported by hardware and destination station */ |
8318d78a JB |
2339 | for (i = 0; i < sband->n_bitrates; i++) |
2340 | if (sta->supp_rates[sband->band] & BIT(i)) | |
2341 | sta->txrate_idx = i; | |
2342 | ||
2343 | sta->last_txrate_idx = sta->txrate_idx; | |
2344 | /* WTF is with this bogus comment? A doesn't have cck rates */ | |
77626355 | 2345 | /* For MODE_IEEE80211A, cck rates are at end of rate table */ |
8318d78a JB |
2346 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
2347 | sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
b481de9c | 2348 | |
c33104f0 TW |
2349 | lq_sta->is_dup = 0; |
2350 | lq_sta->valid_antenna = priv->valid_antenna; | |
2351 | lq_sta->antenna = priv->antenna; | |
2352 | lq_sta->is_green = rs_use_green(priv, conf); | |
2353 | lq_sta->active_rate = priv->active_rate; | |
2354 | lq_sta->active_rate &= ~(0x1000); | |
2355 | lq_sta->active_rate_basic = priv->active_rate_basic; | |
8318d78a | 2356 | lq_sta->band = priv->band; |
c8b0e6e1 | 2357 | #ifdef CONFIG_IWL4965_HT |
77626355 BC |
2358 | /* |
2359 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2360 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2361 | */ | |
c33104f0 TW |
2362 | lq_sta->active_siso_rate = (priv->current_ht_config.supp_mcs_set[0] << 1); |
2363 | lq_sta->active_siso_rate |= | |
270243a5 | 2364 | (priv->current_ht_config.supp_mcs_set[0] & 0x1); |
c33104f0 TW |
2365 | lq_sta->active_siso_rate &= ~((u16)0x2); |
2366 | lq_sta->active_siso_rate = | |
2367 | lq_sta->active_siso_rate << IWL_FIRST_OFDM_RATE; | |
b481de9c | 2368 | |
77626355 | 2369 | /* Same here */ |
c33104f0 TW |
2370 | lq_sta->active_mimo_rate = (priv->current_ht_config.supp_mcs_set[1] << 1); |
2371 | lq_sta->active_mimo_rate |= | |
270243a5 | 2372 | (priv->current_ht_config.supp_mcs_set[1] & 0x1); |
c33104f0 TW |
2373 | lq_sta->active_mimo_rate &= ~((u16)0x2); |
2374 | lq_sta->active_mimo_rate = | |
2375 | lq_sta->active_mimo_rate << IWL_FIRST_OFDM_RATE; | |
2376 | IWL_DEBUG_HT("SISO RATE 0x%X MIMO RATE 0x%X\n", | |
2377 | lq_sta->active_siso_rate, | |
2378 | lq_sta->active_mimo_rate); | |
0c11b4de RR |
2379 | /* as default allow aggregation for all tids */ |
2380 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c8b0e6e1 | 2381 | #endif /*CONFIG_IWL4965_HT*/ |
98d7e09a | 2382 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 2383 | lq_sta->drv = priv; |
98d7e09a | 2384 | #endif |
b481de9c ZY |
2385 | |
2386 | if (priv->assoc_station_added) | |
2387 | priv->lq_mngr.lq_ready = 1; | |
2388 | ||
270243a5 | 2389 | rs_initialize_lq(priv, conf, sta); |
b481de9c ZY |
2390 | } |
2391 | ||
c33104f0 | 2392 | static void rs_fill_link_cmd(struct iwl4965_lq_sta *lq_sta, |
bb8c093b CH |
2393 | struct iwl4965_rate *tx_mcs, |
2394 | struct iwl4965_link_quality_cmd *lq_cmd) | |
b481de9c ZY |
2395 | { |
2396 | int index = 0; | |
b481de9c | 2397 | int rate_idx; |
1b696de2 | 2398 | int repeat_rate = 0; |
b481de9c ZY |
2399 | u8 ant_toggle_count = 0; |
2400 | u8 use_ht_possible = 1; | |
bb8c093b CH |
2401 | struct iwl4965_rate new_rate; |
2402 | struct iwl4965_scale_tbl_info tbl_type = { 0 }; | |
b481de9c | 2403 | |
77626355 | 2404 | /* Override starting rate (index 0) if needed for debug purposes */ |
c33104f0 | 2405 | rs_dbgfs_set_mcs(lq_sta, tx_mcs, index); |
98d7e09a | 2406 | |
77626355 | 2407 | /* Interpret rate_n_flags */ |
8318d78a | 2408 | rs_get_tbl_info_from_mcs(tx_mcs, lq_sta->band, |
b481de9c ZY |
2409 | &tbl_type, &rate_idx); |
2410 | ||
77626355 | 2411 | /* How many times should we repeat the initial rate? */ |
b481de9c ZY |
2412 | if (is_legacy(tbl_type.lq_type)) { |
2413 | ant_toggle_count = 1; | |
1b696de2 | 2414 | repeat_rate = IWL_NUMBER_TRY; |
b481de9c | 2415 | } else |
1b696de2 | 2416 | repeat_rate = IWL_HT_NUMBER_TRY; |
b481de9c ZY |
2417 | |
2418 | lq_cmd->general_params.mimo_delimiter = | |
2419 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2420 | |
2421 | /* Fill 1st table entry (index 0) */ | |
b481de9c ZY |
2422 | lq_cmd->rs_table[index].rate_n_flags = |
2423 | cpu_to_le32(tx_mcs->rate_n_flags); | |
2424 | new_rate.rate_n_flags = tx_mcs->rate_n_flags; | |
2425 | ||
2426 | if (is_mimo(tbl_type.lq_type) || (tbl_type.antenna_type == ANT_MAIN)) | |
77626355 BC |
2427 | lq_cmd->general_params.single_stream_ant_msk |
2428 | = LINK_QUAL_ANT_A_MSK; | |
b481de9c | 2429 | else |
77626355 BC |
2430 | lq_cmd->general_params.single_stream_ant_msk |
2431 | = LINK_QUAL_ANT_B_MSK; | |
b481de9c ZY |
2432 | |
2433 | index++; | |
1b696de2 | 2434 | repeat_rate--; |
b481de9c | 2435 | |
77626355 | 2436 | /* Fill rest of rate table */ |
b481de9c | 2437 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2438 | /* Repeat initial/next rate. |
2439 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2440 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2441 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c ZY |
2442 | if (is_legacy(tbl_type.lq_type)) { |
2443 | if (ant_toggle_count < | |
2444 | NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
2445 | ant_toggle_count++; | |
2446 | else { | |
2447 | rs_toggle_antenna(&new_rate, &tbl_type); | |
2448 | ant_toggle_count = 1; | |
2449 | } | |
2450 | } | |
98d7e09a | 2451 | |
77626355 | 2452 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2453 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2454 | |
2455 | /* Fill next table entry */ | |
b481de9c ZY |
2456 | lq_cmd->rs_table[index].rate_n_flags = |
2457 | cpu_to_le32(new_rate.rate_n_flags); | |
1b696de2 | 2458 | repeat_rate--; |
b481de9c ZY |
2459 | index++; |
2460 | } | |
2461 | ||
8318d78a | 2462 | rs_get_tbl_info_from_mcs(&new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2463 | &rate_idx); |
2464 | ||
77626355 BC |
2465 | /* Indicate to uCode which entries might be MIMO. |
2466 | * If initial rate was MIMO, this will finally end up | |
2467 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2468 | if (is_mimo(tbl_type.lq_type)) |
2469 | lq_cmd->general_params.mimo_delimiter = index; | |
2470 | ||
77626355 | 2471 | /* Get next rate */ |
c33104f0 | 2472 | rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
02dede04 | 2473 | use_ht_possible, &new_rate); |
b481de9c | 2474 | |
77626355 | 2475 | /* How many times should we repeat the next rate? */ |
b481de9c ZY |
2476 | if (is_legacy(tbl_type.lq_type)) { |
2477 | if (ant_toggle_count < NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
2478 | ant_toggle_count++; | |
2479 | else { | |
2480 | rs_toggle_antenna(&new_rate, &tbl_type); | |
2481 | ant_toggle_count = 1; | |
2482 | } | |
1b696de2 | 2483 | repeat_rate = IWL_NUMBER_TRY; |
b481de9c | 2484 | } else |
1b696de2 | 2485 | repeat_rate = IWL_HT_NUMBER_TRY; |
b481de9c | 2486 | |
77626355 BC |
2487 | /* Don't allow HT rates after next pass. |
2488 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2489 | use_ht_possible = 0; |
2490 | ||
77626355 | 2491 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2492 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2493 | |
2494 | /* Fill next table entry */ | |
b481de9c ZY |
2495 | lq_cmd->rs_table[index].rate_n_flags = |
2496 | cpu_to_le32(new_rate.rate_n_flags); | |
b481de9c ZY |
2497 | |
2498 | index++; | |
1b696de2 | 2499 | repeat_rate--; |
b481de9c ZY |
2500 | } |
2501 | ||
b481de9c ZY |
2502 | lq_cmd->general_params.dual_stream_ant_msk = 3; |
2503 | lq_cmd->agg_params.agg_dis_start_th = 3; | |
2504 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2505 | } |
2506 | ||
2507 | static void *rs_alloc(struct ieee80211_local *local) | |
2508 | { | |
2509 | return local->hw.priv; | |
2510 | } | |
2511 | /* rate scale requires free function to be implemented */ | |
2512 | static void rs_free(void *priv_rate) | |
2513 | { | |
2514 | return; | |
2515 | } | |
2516 | ||
2517 | static void rs_clear(void *priv_rate) | |
2518 | { | |
bb8c093b | 2519 | struct iwl4965_priv *priv = (struct iwl4965_priv *) priv_rate; |
b481de9c ZY |
2520 | |
2521 | IWL_DEBUG_RATE("enter\n"); | |
2522 | ||
2523 | priv->lq_mngr.lq_ready = 0; | |
b481de9c ZY |
2524 | |
2525 | IWL_DEBUG_RATE("leave\n"); | |
2526 | } | |
2527 | ||
2528 | static void rs_free_sta(void *priv, void *priv_sta) | |
2529 | { | |
c33104f0 | 2530 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
b481de9c ZY |
2531 | |
2532 | IWL_DEBUG_RATE("enter\n"); | |
c33104f0 | 2533 | kfree(lq_sta); |
b481de9c ZY |
2534 | IWL_DEBUG_RATE("leave\n"); |
2535 | } | |
2536 | ||
2537 | ||
93dc646a | 2538 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2539 | static int open_file_generic(struct inode *inode, struct file *file) |
2540 | { | |
2541 | file->private_data = inode->i_private; | |
2542 | return 0; | |
2543 | } | |
c33104f0 | 2544 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 2545 | struct iwl4965_rate *mcs, int index) |
98d7e09a | 2546 | { |
4457e1a4 RR |
2547 | u32 base_rate; |
2548 | ||
8318d78a | 2549 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
4457e1a4 RR |
2550 | base_rate = 0x800D; |
2551 | else | |
2552 | base_rate = 0x820A; | |
2553 | ||
c33104f0 | 2554 | if (lq_sta->dbg_fixed.rate_n_flags) { |
98d7e09a | 2555 | if (index < 12) |
c33104f0 | 2556 | mcs->rate_n_flags = lq_sta->dbg_fixed.rate_n_flags; |
98d7e09a | 2557 | else |
4457e1a4 | 2558 | mcs->rate_n_flags = base_rate; |
98d7e09a ZY |
2559 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
2560 | return; | |
2561 | } | |
2562 | ||
2563 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
2564 | } | |
5ae212c9 | 2565 | |
98d7e09a ZY |
2566 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2567 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2568 | { | |
c33104f0 | 2569 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
98d7e09a ZY |
2570 | char buf[64]; |
2571 | int buf_size; | |
2572 | u32 parsed_rate; | |
2573 | ||
2574 | memset(buf, 0, sizeof(buf)); | |
2575 | buf_size = min(count, sizeof(buf) - 1); | |
2576 | if (copy_from_user(buf, user_buf, buf_size)) | |
2577 | return -EFAULT; | |
2578 | ||
2579 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
c33104f0 | 2580 | lq_sta->dbg_fixed.rate_n_flags = parsed_rate; |
98d7e09a | 2581 | else |
c33104f0 | 2582 | lq_sta->dbg_fixed.rate_n_flags = 0; |
98d7e09a | 2583 | |
c33104f0 TW |
2584 | lq_sta->active_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2585 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2586 | lq_sta->active_mimo_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2587 | |
2588 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
c33104f0 | 2589 | lq_sta->lq.sta_id, lq_sta->dbg_fixed.rate_n_flags); |
98d7e09a | 2590 | |
c33104f0 TW |
2591 | if (lq_sta->dbg_fixed.rate_n_flags) { |
2592 | rs_fill_link_cmd(lq_sta, &lq_sta->dbg_fixed, &lq_sta->lq); | |
2593 | rs_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); | |
98d7e09a ZY |
2594 | } |
2595 | ||
2596 | return count; | |
2597 | } | |
0209dc11 | 2598 | |
5ae212c9 ZY |
2599 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2600 | char __user *user_buf, size_t count, loff_t *ppos) | |
2601 | { | |
2602 | char buff[1024]; | |
2603 | int desc = 0; | |
2604 | int i = 0; | |
2605 | ||
c33104f0 | 2606 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2607 | |
c33104f0 | 2608 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2609 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 TW |
2610 | lq_sta->total_failed, lq_sta->total_success, |
2611 | lq_sta->active_rate); | |
98d7e09a | 2612 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
c33104f0 | 2613 | lq_sta->dbg_fixed.rate_n_flags); |
5ae212c9 ZY |
2614 | desc += sprintf(buff+desc, "general:" |
2615 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2616 | lq_sta->lq.general_params.flags, |
2617 | lq_sta->lq.general_params.mimo_delimiter, | |
2618 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2619 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2620 | |
2621 | desc += sprintf(buff+desc, "agg:" | |
2622 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2623 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2624 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2625 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2626 | |
2627 | desc += sprintf(buff+desc, | |
2628 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2629 | lq_sta->lq.general_params.start_rate_index[0], |
2630 | lq_sta->lq.general_params.start_rate_index[1], | |
2631 | lq_sta->lq.general_params.start_rate_index[2], | |
2632 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2633 | |
2634 | ||
2635 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2636 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2637 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2638 | |
2639 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2640 | } | |
2641 | ||
2642 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2643 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2644 | .read = rs_sta_dbgfs_scale_table_read, |
2645 | .open = open_file_generic, | |
2646 | }; | |
0209dc11 ZY |
2647 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2648 | char __user *user_buf, size_t count, loff_t *ppos) | |
2649 | { | |
2650 | char buff[1024]; | |
2651 | int desc = 0; | |
2652 | int i, j; | |
2653 | ||
c33104f0 | 2654 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2655 | for (i = 0; i < LQ_SIZE; i++) { |
2656 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2657 | "rate=0x%X\n", | |
c33104f0 TW |
2658 | lq_sta->active_tbl == i?"*":"x", |
2659 | lq_sta->lq_info[i].lq_type, | |
2660 | lq_sta->lq_info[i].is_SGI, | |
2661 | lq_sta->lq_info[i].is_fat, | |
2662 | lq_sta->lq_info[i].is_dup, | |
2663 | lq_sta->lq_info[i].current_rate.rate_n_flags); | |
0209dc11 ZY |
2664 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2665 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2666 | "counter=%d success=%d %%=%d\n", |
2667 | lq_sta->lq_info[i].win[j].counter, | |
2668 | lq_sta->lq_info[i].win[j].success_counter, | |
2669 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2670 | } |
2671 | } | |
2672 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2673 | } | |
2674 | ||
2675 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2676 | .read = rs_sta_dbgfs_stats_table_read, | |
2677 | .open = open_file_generic, | |
2678 | }; | |
5ae212c9 | 2679 | |
93dc646a ZY |
2680 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2681 | struct dentry *dir) | |
2682 | { | |
c33104f0 TW |
2683 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2684 | lq_sta->rs_sta_dbgfs_scale_table_file = | |
0209dc11 | 2685 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2686 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2687 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2688 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2689 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2690 | #ifdef CONFIG_IWL4965_HT |
2691 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = | |
2692 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2693 | &lq_sta->tx_agg_tid_en); | |
2694 | #endif | |
2695 | ||
93dc646a ZY |
2696 | } |
2697 | ||
2698 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2699 | { | |
c33104f0 TW |
2700 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2701 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); | |
2702 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de RR |
2703 | #ifdef CONFIG_IWL4965_HT |
2704 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); | |
2705 | #endif | |
93dc646a ZY |
2706 | } |
2707 | #endif | |
2708 | ||
b481de9c ZY |
2709 | static struct rate_control_ops rs_ops = { |
2710 | .module = NULL, | |
2711 | .name = RS_NAME, | |
2712 | .tx_status = rs_tx_status, | |
2713 | .get_rate = rs_get_rate, | |
2714 | .rate_init = rs_rate_init, | |
2715 | .clear = rs_clear, | |
2716 | .alloc = rs_alloc, | |
2717 | .free = rs_free, | |
2718 | .alloc_sta = rs_alloc_sta, | |
2719 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2720 | #ifdef CONFIG_MAC80211_DEBUGFS |
2721 | .add_sta_debugfs = rs_add_debugfs, | |
2722 | .remove_sta_debugfs = rs_remove_debugfs, | |
2723 | #endif | |
b481de9c ZY |
2724 | }; |
2725 | ||
bb8c093b | 2726 | int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) |
b481de9c ZY |
2727 | { |
2728 | struct ieee80211_local *local = hw_to_local(hw); | |
bb8c093b | 2729 | struct iwl4965_priv *priv = hw->priv; |
c33104f0 | 2730 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2731 | struct sta_info *sta; |
c33104f0 | 2732 | int cnt = 0, i; |
b481de9c ZY |
2733 | u32 samples = 0, success = 0, good = 0; |
2734 | unsigned long now = jiffies; | |
2735 | u32 max_time = 0; | |
2736 | u8 lq_type, antenna; | |
2737 | ||
d0709a65 JB |
2738 | rcu_read_lock(); |
2739 | ||
b481de9c ZY |
2740 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); |
2741 | if (!sta || !sta->rate_ctrl_priv) { | |
d0709a65 | 2742 | if (sta) |
b481de9c | 2743 | IWL_DEBUG_RATE("leave - no private rate data!\n"); |
d0709a65 | 2744 | else |
b481de9c | 2745 | IWL_DEBUG_RATE("leave - no station!\n"); |
d0709a65 | 2746 | rcu_read_unlock(); |
b481de9c ZY |
2747 | return sprintf(buf, "station %d not found\n", sta_id); |
2748 | } | |
2749 | ||
c33104f0 | 2750 | lq_sta = (void *)sta->rate_ctrl_priv; |
b481de9c | 2751 | |
c33104f0 TW |
2752 | lq_type = lq_sta->lq_info[lq_sta->active_tbl].lq_type; |
2753 | antenna = lq_sta->lq_info[lq_sta->active_tbl].antenna_type; | |
b481de9c ZY |
2754 | |
2755 | if (is_legacy(lq_type)) | |
2756 | i = IWL_RATE_54M_INDEX; | |
2757 | else | |
2758 | i = IWL_RATE_60M_INDEX; | |
2759 | while (1) { | |
2760 | u64 mask; | |
2761 | int j; | |
c33104f0 | 2762 | int active = lq_sta->active_tbl; |
b481de9c | 2763 | |
c33104f0 TW |
2764 | cnt += |
2765 | sprintf(&buf[cnt], " %2dMbs: ", iwl4965_rates[i].ieee / 2); | |
b481de9c ZY |
2766 | |
2767 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2768 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
c33104f0 TW |
2769 | buf[cnt++] = |
2770 | (lq_sta->lq_info[active].win[i].data & mask) | |
b481de9c ZY |
2771 | ? '1' : '0'; |
2772 | ||
c33104f0 TW |
2773 | samples += lq_sta->lq_info[active].win[i].counter; |
2774 | good += lq_sta->lq_info[active].win[i].success_counter; | |
2775 | success += lq_sta->lq_info[active].win[i].success_counter * | |
bb8c093b | 2776 | iwl4965_rates[i].ieee; |
b481de9c | 2777 | |
c33104f0 | 2778 | if (lq_sta->lq_info[active].win[i].stamp) { |
b481de9c ZY |
2779 | int delta = |
2780 | jiffies_to_msecs(now - | |
c33104f0 | 2781 | lq_sta->lq_info[active].win[i].stamp); |
b481de9c ZY |
2782 | |
2783 | if (delta > max_time) | |
2784 | max_time = delta; | |
2785 | ||
c33104f0 | 2786 | cnt += sprintf(&buf[cnt], "%5dms\n", delta); |
b481de9c | 2787 | } else |
c33104f0 | 2788 | buf[cnt++] = '\n'; |
b481de9c | 2789 | |
bb8c093b | 2790 | j = iwl4965_get_prev_ieee_rate(i); |
b481de9c ZY |
2791 | if (j == i) |
2792 | break; | |
2793 | i = j; | |
2794 | } | |
2795 | ||
2796 | /* Display the average rate of all samples taken. | |
2797 | * | |
77626355 | 2798 | * NOTE: We multiply # of samples by 2 since the IEEE measurement |
bb8c093b | 2799 | * added from iwl4965_rates is actually 2X the rate */ |
b481de9c | 2800 | if (samples) |
c33104f0 | 2801 | cnt += sprintf(&buf[cnt], |
b481de9c ZY |
2802 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" |
2803 | "%3d%% success (%d good packets over %d tries)\n", | |
2804 | success / (2 * samples), (success * 5 / samples) % 10, | |
2805 | max_time, good * 100 / samples, good, samples); | |
2806 | else | |
c33104f0 TW |
2807 | cnt += sprintf(&buf[cnt], "\nAverage rate: 0Mbs\n"); |
2808 | ||
2809 | cnt += sprintf(&buf[cnt], "\nrate scale type %d antenna %d " | |
b481de9c | 2810 | "active_search %d rate index %d\n", lq_type, antenna, |
8318d78a | 2811 | lq_sta->search_better_tbl, sta->last_txrate_idx); |
b481de9c | 2812 | |
d0709a65 | 2813 | rcu_read_unlock(); |
c33104f0 | 2814 | return cnt; |
b481de9c ZY |
2815 | } |
2816 | ||
bb8c093b | 2817 | void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) |
b481de9c | 2818 | { |
bb8c093b | 2819 | struct iwl4965_priv *priv = hw->priv; |
b481de9c ZY |
2820 | |
2821 | priv->lq_mngr.lq_ready = 1; | |
2822 | } | |
2823 | ||
bb8c093b | 2824 | void iwl4965_rate_control_register(struct ieee80211_hw *hw) |
b481de9c ZY |
2825 | { |
2826 | ieee80211_rate_control_register(&rs_ops); | |
2827 | } | |
2828 | ||
bb8c093b | 2829 | void iwl4965_rate_control_unregister(struct ieee80211_hw *hw) |
b481de9c ZY |
2830 | { |
2831 | ieee80211_rate_control_unregister(&rs_ops); | |
2832 | } | |
2833 |