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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
eb7ae89c | 3 | * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved. |
b481de9c ZY |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * James P. Ketrenos <ipw2100-admin@linux.intel.com> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/wireless.h> | |
30 | #include <net/mac80211.h> | |
b481de9c ZY |
31 | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
2c8dccc7 | 38 | #include "../net/mac80211/rate.h" |
b481de9c | 39 | |
3e0d4cb1 | 40 | #include "iwl-dev.h" |
857485c0 | 41 | #include "iwl-core.h" |
b481de9c ZY |
42 | #include "iwl-helpers.h" |
43 | ||
44 | #define RS_NAME "iwl-4965-rs" | |
45 | ||
aade00ce | 46 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
47 | #define IWL_NUMBER_TRY 1 |
48 | #define IWL_HT_NUMBER_TRY 3 | |
49 | ||
77626355 BC |
50 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
51 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
52 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
53 | ||
54 | /* max time to accum history 2 seconds */ | |
55 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) | |
b481de9c ZY |
56 | |
57 | static u8 rs_ht_to_legacy[] = { | |
58 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
62 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
63 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
64 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
65 | }; | |
66 | ||
aade00ce GC |
67 | static const u8 ant_toggle_lookup[] = { |
68 | /*ANT_NONE -> */ ANT_NONE, | |
69 | /*ANT_A -> */ ANT_B, | |
70 | /*ANT_B -> */ ANT_C, | |
71 | /*ANT_AB -> */ ANT_BC, | |
72 | /*ANT_C -> */ ANT_A, | |
73 | /*ANT_AC -> */ ANT_AB, | |
74 | /*ANT_BC -> */ ANT_AC, | |
75 | /*ANT_ABC -> */ ANT_ABC, | |
76 | }; | |
77 | ||
77626355 BC |
78 | /** |
79 | * struct iwl4965_rate_scale_data -- tx success history for one rate | |
80 | */ | |
bb8c093b | 81 | struct iwl4965_rate_scale_data { |
77626355 BC |
82 | u64 data; /* bitmap of successful frames */ |
83 | s32 success_counter; /* number of frames successful */ | |
84 | s32 success_ratio; /* per-cent * 128 */ | |
85 | s32 counter; /* number of frames attempted */ | |
86 | s32 average_tpt; /* success ratio * expected throughput */ | |
b481de9c ZY |
87 | unsigned long stamp; |
88 | }; | |
89 | ||
77626355 BC |
90 | /** |
91 | * struct iwl4965_scale_tbl_info -- tx params and success history for all rates | |
92 | * | |
0c11b4de | 93 | * There are two of these in struct iwl4965_lq_sta, |
77626355 BC |
94 | * one for "active", and one for "search". |
95 | */ | |
bb8c093b | 96 | struct iwl4965_scale_tbl_info { |
fde0db31 GC |
97 | enum iwl_table_type lq_type; |
98 | u8 ant_type; | |
77626355 BC |
99 | u8 is_SGI; /* 1 = short guard interval */ |
100 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
101 | u8 is_dup; /* 1 = duplicated data streams */ | |
102 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
103 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
39e88504 | 104 | u32 current_rate; /* rate_n_flags, uCode API format */ |
77626355 | 105 | struct iwl4965_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
106 | }; |
107 | ||
0c11b4de RR |
108 | struct iwl4965_traffic_load { |
109 | unsigned long time_stamp; /* age of the oldest statistics */ | |
110 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
111 | * slice */ | |
112 | u32 total; /* total num of packets during the | |
113 | * last TID_MAX_TIME_DIFF */ | |
114 | u8 queue_count; /* number of queues that has | |
115 | * been used since the last cleanup */ | |
116 | u8 head; /* start of the circular buffer */ | |
117 | }; | |
118 | ||
77626355 | 119 | /** |
0c11b4de | 120 | * struct iwl4965_lq_sta -- driver's rate scaling private structure |
77626355 BC |
121 | * |
122 | * Pointer to this gets passed back and forth between driver and mac80211. | |
123 | */ | |
c33104f0 | 124 | struct iwl4965_lq_sta { |
77626355 BC |
125 | u8 active_tbl; /* index of active table, range 0-1 */ |
126 | u8 enable_counter; /* indicates HT mode */ | |
127 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
128 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 129 | s32 last_tpt; |
77626355 BC |
130 | |
131 | /* The following determine when to search for a new mode */ | |
b481de9c | 132 | u32 table_count_limit; |
77626355 BC |
133 | u32 max_failure_limit; /* # failed frames before new search */ |
134 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 135 | u32 table_count; |
77626355 BC |
136 | u32 total_failed; /* total failed frames, any/all rates */ |
137 | u32 total_success; /* total successful frames, any/all rates */ | |
138 | u32 flush_timer; /* time staying in mode before new search */ | |
139 | ||
140 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
141 | u8 is_green; |
142 | u8 is_dup; | |
8318d78a | 143 | enum ieee80211_band band; |
b481de9c | 144 | u8 ibss_sta_added; |
77626355 BC |
145 | |
146 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 147 | u32 supp_rates; |
39e88504 | 148 | u16 active_legacy_rate; |
b481de9c | 149 | u16 active_siso_rate; |
fde0db31 GC |
150 | u16 active_mimo2_rate; |
151 | u16 active_mimo3_rate; | |
b481de9c | 152 | u16 active_rate_basic; |
77626355 | 153 | |
66c73db7 | 154 | struct iwl_link_quality_cmd lq; |
77626355 | 155 | struct iwl4965_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
0c11b4de RR |
156 | struct iwl4965_traffic_load load[TID_MAX_LOAD_COUNT]; |
157 | u8 tx_agg_tid_en; | |
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 | 161 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; |
39e88504 | 162 | u32 dbg_fixed_rate; |
5ae212c9 | 163 | #endif |
6243065d | 164 | struct iwl_priv *drv; |
b481de9c ZY |
165 | }; |
166 | ||
c79dd5b5 | 167 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
168 | struct net_device *dev, |
169 | struct ieee80211_hdr *hdr, | |
170 | struct sta_info *sta); | |
fde0db31 GC |
171 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
172 | struct iwl4965_lq_sta *lq_sta, | |
07bc28ed | 173 | u32 rate_n_flags); |
b481de9c ZY |
174 | |
175 | ||
98d7e09a | 176 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 177 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 178 | u32 *rate_n_flags, int index); |
98d7e09a | 179 | #else |
c33104f0 | 180 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 181 | u32 *rate_n_flags, int index) |
98d7e09a ZY |
182 | {} |
183 | #endif | |
77626355 BC |
184 | |
185 | /* | |
186 | * Expected throughput metrics for following rates: | |
187 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
188 | * "G" is the only table that supports CCK (the first 4 rates). | |
189 | */ | |
fde0db31 | 190 | /*FIXME:RS:need to spearate tables for MIMO2/MIMO3*/ |
b481de9c ZY |
191 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
192 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
193 | }; | |
194 | ||
195 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
196 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
197 | }; | |
198 | ||
199 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
200 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
201 | }; | |
202 | ||
203 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
204 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
205 | }; | |
206 | ||
207 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
208 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
209 | }; | |
210 | ||
211 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
212 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
213 | }; | |
214 | ||
215 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
216 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
217 | }; | |
218 | ||
219 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
220 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
221 | }; | |
222 | ||
223 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
224 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
225 | }; | |
226 | ||
227 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
228 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
229 | }; | |
230 | ||
39e88504 | 231 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
232 | { |
233 | return (u8)(rate_n_flags & 0xFF); | |
234 | } | |
235 | ||
bb8c093b | 236 | static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window) |
b481de9c ZY |
237 | { |
238 | window->data = 0; | |
239 | window->success_counter = 0; | |
240 | window->success_ratio = IWL_INVALID_VALUE; | |
241 | window->counter = 0; | |
242 | window->average_tpt = IWL_INVALID_VALUE; | |
243 | window->stamp = 0; | |
b481de9c ZY |
244 | } |
245 | ||
aade00ce GC |
246 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
247 | { | |
248 | return ((ant_type & valid_antenna) == ant_type); | |
249 | } | |
250 | ||
0c11b4de RR |
251 | /* |
252 | * removes the old data from the statistics. All data that is older than | |
253 | * TID_MAX_TIME_DIFF, will be deleted. | |
254 | */ | |
255 | static void rs_tl_rm_old_stats(struct iwl4965_traffic_load *tl, u32 curr_time) | |
256 | { | |
257 | /* The oldest age we want to keep */ | |
258 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
259 | ||
260 | while (tl->queue_count && | |
261 | (tl->time_stamp < oldest_time)) { | |
262 | tl->total -= tl->packet_count[tl->head]; | |
263 | tl->packet_count[tl->head] = 0; | |
264 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
265 | tl->queue_count--; | |
266 | tl->head++; | |
267 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
268 | tl->head = 0; | |
269 | } | |
270 | } | |
271 | ||
272 | /* | |
273 | * increment traffic load value for tid and also remove | |
274 | * any old values if passed the certain time period | |
275 | */ | |
54dbb525 TW |
276 | static void rs_tl_add_packet(struct iwl4965_lq_sta *lq_data, |
277 | struct ieee80211_hdr *hdr) | |
0c11b4de RR |
278 | { |
279 | u32 curr_time = jiffies_to_msecs(jiffies); | |
280 | u32 time_diff; | |
281 | s32 index; | |
282 | struct iwl4965_traffic_load *tl = NULL; | |
54dbb525 TW |
283 | u16 fc = le16_to_cpu(hdr->frame_control); |
284 | u8 tid; | |
0c11b4de | 285 | |
54dbb525 TW |
286 | if (ieee80211_is_qos_data(fc)) { |
287 | u8 *qc = ieee80211_get_qos_ctrl(hdr, ieee80211_get_hdrlen(fc)); | |
288 | tid = qc[0] & 0xf; | |
289 | } else | |
0c11b4de RR |
290 | return; |
291 | ||
292 | tl = &lq_data->load[tid]; | |
293 | ||
294 | curr_time -= curr_time % TID_ROUND_VALUE; | |
295 | ||
296 | /* Happens only for the first packet. Initialize the data */ | |
297 | if (!(tl->queue_count)) { | |
298 | tl->total = 1; | |
299 | tl->time_stamp = curr_time; | |
300 | tl->queue_count = 1; | |
301 | tl->head = 0; | |
302 | tl->packet_count[0] = 1; | |
303 | return; | |
304 | } | |
305 | ||
306 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
307 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
308 | ||
309 | /* The history is too long: remove data that is older than */ | |
310 | /* TID_MAX_TIME_DIFF */ | |
311 | if (index >= TID_QUEUE_MAX_SIZE) | |
312 | rs_tl_rm_old_stats(tl, curr_time); | |
313 | ||
314 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
315 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
316 | tl->total = tl->total + 1; | |
317 | ||
318 | if ((index + 1) > tl->queue_count) | |
319 | tl->queue_count = index + 1; | |
320 | } | |
321 | ||
322 | /* | |
323 | get the traffic load value for tid | |
324 | */ | |
325 | static u32 rs_tl_get_load(struct iwl4965_lq_sta *lq_data, u8 tid) | |
326 | { | |
327 | u32 curr_time = jiffies_to_msecs(jiffies); | |
328 | u32 time_diff; | |
329 | s32 index; | |
330 | struct iwl4965_traffic_load *tl = NULL; | |
331 | ||
332 | if (tid >= TID_MAX_LOAD_COUNT) | |
333 | return 0; | |
334 | ||
335 | tl = &(lq_data->load[tid]); | |
336 | ||
337 | curr_time -= curr_time % TID_ROUND_VALUE; | |
338 | ||
339 | if (!(tl->queue_count)) | |
340 | return 0; | |
341 | ||
342 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
343 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
344 | ||
345 | /* The history is too long: remove data that is older than */ | |
346 | /* TID_MAX_TIME_DIFF */ | |
347 | if (index >= TID_QUEUE_MAX_SIZE) | |
348 | rs_tl_rm_old_stats(tl, curr_time); | |
349 | ||
350 | return tl->total; | |
351 | } | |
352 | ||
c79dd5b5 | 353 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
0c11b4de RR |
354 | struct iwl4965_lq_sta *lq_data, u8 tid, |
355 | struct sta_info *sta) | |
356 | { | |
357 | unsigned long state; | |
358 | DECLARE_MAC_BUF(mac); | |
359 | ||
07346f81 | 360 | spin_lock_bh(&sta->lock); |
cee24a3e | 361 | state = sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 362 | spin_unlock_bh(&sta->lock); |
0c11b4de RR |
363 | |
364 | if (state == HT_AGG_STATE_IDLE && | |
365 | rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { | |
366 | IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n", | |
367 | print_mac(mac, sta->addr), tid); | |
368 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); | |
369 | } | |
370 | } | |
371 | ||
c79dd5b5 | 372 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
0c11b4de RR |
373 | struct iwl4965_lq_sta *lq_data, |
374 | struct sta_info *sta) | |
375 | { | |
376 | if ((tid < TID_MAX_LOAD_COUNT)) | |
377 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
378 | else if (tid == IWL_AGG_ALL_TID) | |
379 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
380 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
381 | } | |
382 | ||
39e88504 | 383 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 384 | { |
39e88504 GC |
385 | return (!!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
386 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
387 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK)); | |
fde0db31 GC |
388 | } |
389 | ||
77626355 BC |
390 | /** |
391 | * rs_collect_tx_data - Update the success/failure sliding window | |
392 | * | |
393 | * We keep a sliding window of the last 62 packets transmitted | |
394 | * at this rate. window->data contains the bitmask of successful | |
395 | * packets. | |
396 | */ | |
bb8c093b | 397 | static int rs_collect_tx_data(struct iwl4965_rate_scale_data *windows, |
99556438 RR |
398 | int scale_index, s32 tpt, int retries, |
399 | int successes) | |
b481de9c | 400 | { |
bb8c093b | 401 | struct iwl4965_rate_scale_data *window = NULL; |
39e88504 | 402 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
403 | s32 fail_count; |
404 | ||
dc2453ae TW |
405 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
406 | return -EINVAL; | |
b481de9c | 407 | |
77626355 | 408 | /* Select data for current tx bit rate */ |
b481de9c ZY |
409 | window = &(windows[scale_index]); |
410 | ||
77626355 BC |
411 | /* |
412 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
413 | * history window; anything older isn't really relevant any more. | |
414 | * If we have filled up the sliding window, drop the oldest attempt; | |
415 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
416 | * subtract "1" from the success counter (this is the main reason | |
417 | * we keep these bitmaps!). | |
418 | */ | |
99556438 | 419 | while (retries > 0) { |
39e88504 GC |
420 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
421 | ||
422 | /* remove earliest */ | |
423 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
424 | ||
99556438 RR |
425 | if (window->data & mask) { |
426 | window->data &= ~mask; | |
39e88504 | 427 | window->success_counter--; |
99556438 | 428 | } |
b481de9c | 429 | } |
b481de9c | 430 | |
99556438 RR |
431 | /* Increment frames-attempted counter */ |
432 | window->counter++; | |
433 | ||
434 | /* Shift bitmap by one frame (throw away oldest history), | |
435 | * OR in "1", and increment "success" if this | |
436 | * frame was successful. */ | |
39e88504 | 437 | window->data <<= 1;; |
99556438 | 438 | if (successes > 0) { |
39e88504 | 439 | window->success_counter++; |
99556438 RR |
440 | window->data |= 0x1; |
441 | successes--; | |
442 | } | |
77626355 | 443 | |
99556438 | 444 | retries--; |
b481de9c ZY |
445 | } |
446 | ||
77626355 | 447 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
448 | if (window->counter > 0) |
449 | window->success_ratio = 128 * (100 * window->success_counter) | |
450 | / window->counter; | |
451 | else | |
452 | window->success_ratio = IWL_INVALID_VALUE; | |
453 | ||
454 | fail_count = window->counter - window->success_counter; | |
455 | ||
77626355 | 456 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
457 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
458 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
459 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
460 | else | |
461 | window->average_tpt = IWL_INVALID_VALUE; | |
462 | ||
77626355 | 463 | /* Tag this window as having been updated */ |
b481de9c ZY |
464 | window->stamp = jiffies; |
465 | ||
dc2453ae | 466 | return 0; |
b481de9c ZY |
467 | } |
468 | ||
77626355 BC |
469 | /* |
470 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
471 | */ | |
39e88504 GC |
472 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
473 | static u32 rate_n_flags_from_tbl(struct iwl4965_scale_tbl_info *tbl, | |
474 | int index, u8 use_green) | |
b481de9c | 475 | { |
39e88504 GC |
476 | u32 rate_n_flags = 0; |
477 | ||
b481de9c | 478 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 479 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 480 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 481 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 482 | |
fde0db31 GC |
483 | } else if (is_Ht(tbl->lq_type)) { |
484 | if (index > IWL_LAST_OFDM_RATE) { | |
485 | IWL_ERROR("invalid HT rate index %d\n", index); | |
b481de9c | 486 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 487 | } |
39e88504 | 488 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
489 | |
490 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 491 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 492 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 493 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 494 | else |
1826dcc0 | 495 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 496 | } else { |
fde0db31 | 497 | IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
498 | } |
499 | ||
39e88504 | 500 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 501 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 502 | |
39e88504 GC |
503 | if (is_Ht(tbl->lq_type)) { |
504 | if (tbl->is_fat) { | |
505 | if (tbl->is_dup) | |
506 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
507 | else | |
508 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
509 | } | |
510 | if (tbl->is_SGI) | |
511 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
512 | ||
513 | if (use_green) { | |
514 | rate_n_flags |= RATE_MCS_GF_MSK; | |
515 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
516 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
517 | IWL_ERROR("GF was set with SGI:SISO\n"); | |
518 | } | |
519 | } | |
b481de9c | 520 | } |
39e88504 | 521 | return rate_n_flags; |
b481de9c ZY |
522 | } |
523 | ||
77626355 BC |
524 | /* |
525 | * Interpret uCode API's rate_n_flags format, | |
526 | * fill "search" or "active" tx mode table. | |
527 | */ | |
39e88504 | 528 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a JB |
529 | enum ieee80211_band band, |
530 | struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
531 | int *rate_idx) |
532 | { | |
39e88504 GC |
533 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
534 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
535 | u8 mcs; | |
b481de9c | 536 | |
39e88504 | 537 | *rate_idx = iwl4965_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 538 | |
fde0db31 | 539 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 540 | *rate_idx = -1; |
dc2453ae | 541 | return -EINVAL; |
b481de9c | 542 | } |
77626355 | 543 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
544 | tbl->is_fat = 0; |
545 | tbl->is_dup = 0; | |
fde0db31 GC |
546 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
547 | tbl->lq_type = LQ_NONE; | |
b481de9c | 548 | |
77626355 | 549 | /* legacy rate format */ |
39e88504 | 550 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 551 | if (num_of_ant == 1) { |
8318d78a | 552 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
553 | tbl->lq_type = LQ_A; |
554 | else | |
555 | tbl->lq_type = LQ_G; | |
b481de9c | 556 | } |
fde0db31 | 557 | /* HT rate format */ |
b481de9c | 558 | } else { |
39e88504 | 559 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
560 | tbl->is_SGI = 1; |
561 | ||
39e88504 GC |
562 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
563 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
564 | tbl->is_fat = 1; |
565 | ||
39e88504 | 566 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 567 | tbl->is_dup = 1; |
fde0db31 | 568 | |
39e88504 | 569 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 570 | |
39e88504 GC |
571 | /* SISO */ |
572 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
573 | if (num_of_ant == 1) |
574 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
575 | /* MIMO2 */ | |
39e88504 | 576 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
577 | if (num_of_ant == 2) |
578 | tbl->lq_type = LQ_MIMO2; | |
579 | /* MIMO3 */ | |
580 | } else { | |
581 | if (num_of_ant == 3) | |
582 | tbl->lq_type = LQ_MIMO3; | |
583 | } | |
b481de9c ZY |
584 | } |
585 | return 0; | |
586 | } | |
aade00ce GC |
587 | |
588 | /* switch to another antenna/antennas and return 1 */ | |
589 | /* if no other valid antenna found, return 0 */ | |
590 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
591 | struct iwl4965_scale_tbl_info *tbl) | |
b481de9c | 592 | { |
aade00ce GC |
593 | u8 new_ant_type; |
594 | ||
595 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
596 | return 0; | |
597 | ||
598 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
599 | return 0; | |
600 | ||
601 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
602 | ||
603 | while ((new_ant_type != tbl->ant_type) && | |
604 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
605 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
606 | ||
607 | if (new_ant_type == tbl->ant_type) | |
608 | return 0; | |
609 | ||
610 | tbl->ant_type = new_ant_type; | |
611 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
612 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
613 | return 1; | |
b481de9c ZY |
614 | } |
615 | ||
39e88504 | 616 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 617 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
618 | #if 0 |
619 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 620 | { |
270243a5 RR |
621 | return ((conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
622 | priv->current_ht_config.is_green_field && | |
623 | !priv->current_ht_config.non_GF_STA_present); | |
f935a6da | 624 | } |
4f85f5b3 | 625 | #endif |
f935a6da GC |
626 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
627 | { | |
dc2453ae | 628 | return 0; |
b481de9c ZY |
629 | } |
630 | ||
631 | /** | |
632 | * rs_get_supported_rates - get the available rates | |
633 | * | |
634 | * if management frame or broadcast frame only return | |
635 | * basic available rates. | |
636 | * | |
637 | */ | |
eecd6e57 | 638 | static u16 rs_get_supported_rates(struct iwl4965_lq_sta *lq_sta, |
b481de9c | 639 | struct ieee80211_hdr *hdr, |
eecd6e57 | 640 | enum iwl_table_type rate_type) |
b481de9c | 641 | { |
eecd6e57 GC |
642 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
643 | lq_sta->active_rate_basic) | |
644 | return lq_sta->active_rate_basic; | |
645 | ||
646 | if (is_legacy(rate_type)) { | |
647 | return lq_sta->active_legacy_rate; | |
648 | } else { | |
b481de9c | 649 | if (is_siso(rate_type)) |
eecd6e57 | 650 | return lq_sta->active_siso_rate; |
fde0db31 | 651 | else if (is_mimo2(rate_type)) |
eecd6e57 | 652 | return lq_sta->active_mimo2_rate; |
b481de9c | 653 | else |
eecd6e57 | 654 | return lq_sta->active_mimo3_rate; |
c33104f0 | 655 | } |
b481de9c ZY |
656 | } |
657 | ||
bf403db8 EK |
658 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
659 | int rate_type) | |
b481de9c ZY |
660 | { |
661 | u8 high = IWL_RATE_INVALID; | |
662 | u8 low = IWL_RATE_INVALID; | |
663 | ||
01ebd063 | 664 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
665 | * the rate table */ |
666 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
667 | int i; | |
668 | u32 mask; | |
669 | ||
670 | /* Find the previous rate that is in the rate mask */ | |
671 | i = index - 1; | |
672 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
673 | if (rate_mask & mask) { | |
674 | low = i; | |
675 | break; | |
676 | } | |
677 | } | |
678 | ||
679 | /* Find the next rate that is in the rate mask */ | |
680 | i = index + 1; | |
681 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
682 | if (rate_mask & mask) { | |
683 | high = i; | |
684 | break; | |
685 | } | |
686 | } | |
687 | ||
688 | return (high << 8) | low; | |
689 | } | |
690 | ||
691 | low = index; | |
692 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 693 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
694 | if (low == IWL_RATE_INVALID) |
695 | break; | |
696 | if (rate_mask & (1 << low)) | |
697 | break; | |
698 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
699 | } | |
700 | ||
701 | high = index; | |
702 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 703 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
704 | if (high == IWL_RATE_INVALID) |
705 | break; | |
706 | if (rate_mask & (1 << high)) | |
707 | break; | |
708 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
709 | } | |
710 | ||
711 | return (high << 8) | low; | |
712 | } | |
713 | ||
39e88504 | 714 | static u32 rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 715 | struct iwl4965_scale_tbl_info *tbl, u8 scale_index, |
39e88504 | 716 | u8 ht_possible) |
b481de9c | 717 | { |
b481de9c ZY |
718 | s32 low; |
719 | u16 rate_mask; | |
720 | u16 high_low; | |
721 | u8 switch_to_legacy = 0; | |
c33104f0 | 722 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
723 | |
724 | /* check if we need to switch from HT to legacy rates. | |
725 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
726 | * are always supported (spec demand) */ | |
727 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
728 | switch_to_legacy = 1; | |
729 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 730 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
731 | tbl->lq_type = LQ_A; |
732 | else | |
733 | tbl->lq_type = LQ_G; | |
734 | ||
69fdb309 | 735 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 736 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
737 | |
738 | tbl->is_fat = 0; | |
739 | tbl->is_SGI = 0; | |
740 | } | |
741 | ||
eecd6e57 | 742 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 743 | |
77626355 | 744 | /* Mask with station rate restriction */ |
b481de9c | 745 | if (is_legacy(tbl->lq_type)) { |
77626355 | 746 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 747 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 748 | rate_mask = (u16)(rate_mask & |
c33104f0 | 749 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 750 | else |
c33104f0 | 751 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
752 | } |
753 | ||
77626355 | 754 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 755 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
756 | low = scale_index; |
757 | goto out; | |
b481de9c ZY |
758 | } |
759 | ||
bf403db8 EK |
760 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
761 | tbl->lq_type); | |
b481de9c ZY |
762 | low = high_low & 0xff; |
763 | ||
39e88504 GC |
764 | if (low == IWL_RATE_INVALID) |
765 | low = scale_index; | |
766 | ||
767 | out: | |
768 | return rate_n_flags_from_tbl(tbl, low, is_green); | |
b481de9c ZY |
769 | } |
770 | ||
77626355 BC |
771 | /* |
772 | * mac80211 sends us Tx status | |
773 | */ | |
c33104f0 | 774 | static void rs_tx_status(void *priv_rate, struct net_device *dev, |
e039fa4a | 775 | struct sk_buff *skb) |
b481de9c ZY |
776 | { |
777 | int status; | |
778 | u8 retries; | |
779 | int rs_index, index = 0; | |
c33104f0 | 780 | struct iwl4965_lq_sta *lq_sta; |
66c73db7 | 781 | struct iwl_link_quality_cmd *table; |
b481de9c ZY |
782 | struct sta_info *sta; |
783 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
c79dd5b5 | 784 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
b481de9c | 785 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
4c424e4c | 786 | struct ieee80211_hw *hw = local_to_hw(local); |
e039fa4a | 787 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
bb8c093b CH |
788 | struct iwl4965_rate_scale_data *window = NULL; |
789 | struct iwl4965_rate_scale_data *search_win = NULL; | |
39e88504 | 790 | u32 tx_rate; |
bb8c093b CH |
791 | struct iwl4965_scale_tbl_info tbl_type; |
792 | struct iwl4965_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c ZY |
793 | u8 active_index = 0; |
794 | u16 fc = le16_to_cpu(hdr->frame_control); | |
795 | s32 tpt = 0; | |
796 | ||
58826351 | 797 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
798 | |
799 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
800 | return; | |
801 | ||
99556438 | 802 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
803 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
804 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
805 | return; |
806 | ||
e039fa4a | 807 | retries = info->status.retry_count; |
b481de9c ZY |
808 | |
809 | if (retries > 15) | |
810 | retries = 15; | |
811 | ||
d0709a65 | 812 | rcu_read_lock(); |
b481de9c ZY |
813 | |
814 | sta = sta_info_get(local, hdr->addr1); | |
815 | ||
f4d6082d TW |
816 | if (!sta || !sta->rate_ctrl_priv) |
817 | goto out; | |
818 | ||
b481de9c | 819 | |
c33104f0 | 820 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c ZY |
821 | |
822 | if (!priv->lq_mngr.lq_ready) | |
f4d6082d | 823 | goto out; |
b481de9c | 824 | |
c33104f0 TW |
825 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
826 | !lq_sta->ibss_sta_added) | |
f4d6082d | 827 | goto out; |
b481de9c | 828 | |
c33104f0 TW |
829 | table = &lq_sta->lq; |
830 | active_index = lq_sta->active_tbl; | |
b481de9c | 831 | |
c33104f0 TW |
832 | curr_tbl = &(lq_sta->lq_info[active_index]); |
833 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
bb8c093b | 834 | window = (struct iwl4965_rate_scale_data *) |
b481de9c | 835 | &(curr_tbl->win[0]); |
bb8c093b | 836 | search_win = (struct iwl4965_rate_scale_data *) |
b481de9c ZY |
837 | &(search_tbl->win[0]); |
838 | ||
77626355 BC |
839 | /* |
840 | * Ignore this Tx frame response if its initial rate doesn't match | |
841 | * that of latest Link Quality command. There may be stragglers | |
842 | * from a previous Link Quality command, but we're no longer interested | |
843 | * in those; they're either from the "active" mode while we're trying | |
844 | * to check "search" mode, or a prior "search" mode after we've moved | |
845 | * to a new "search" mode (which might become the new "active" mode). | |
846 | */ | |
39e88504 GC |
847 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
848 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
849 | if (priv->band == IEEE80211_BAND_5GHZ) |
850 | rs_index -= IWL_FIRST_OFDM_RATE; | |
851 | ||
e039fa4a | 852 | if ((info->tx_rate_idx < 0) || |
4c424e4c | 853 | (tbl_type.is_SGI ^ |
e039fa4a | 854 | !!(info->flags & IEEE80211_TX_CTL_SHORT_GI)) || |
4c424e4c | 855 | (tbl_type.is_fat ^ |
e039fa4a | 856 | !!(info->flags & IEEE80211_TX_CTL_40_MHZ_WIDTH)) || |
4c424e4c | 857 | (tbl_type.is_dup ^ |
e039fa4a JB |
858 | !!(info->flags & IEEE80211_TX_CTL_DUP_DATA)) || |
859 | (tbl_type.ant_type ^ info->antenna_sel_tx) || | |
39e88504 | 860 | (!!(tx_rate & RATE_MCS_HT_MSK) ^ |
e039fa4a | 861 | !!(info->flags & IEEE80211_TX_CTL_OFDM_HT)) || |
39e88504 | 862 | (!!(tx_rate & RATE_MCS_GF_MSK) ^ |
e039fa4a | 863 | !!(info->flags & IEEE80211_TX_CTL_GREEN_FIELD)) || |
4c424e4c | 864 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e039fa4a | 865 | hw->wiphy->bands[info->band]->bitrates[info->tx_rate_idx].bitrate)) { |
39e88504 | 866 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
f4d6082d | 867 | goto out; |
b481de9c ZY |
868 | } |
869 | ||
77626355 | 870 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 871 | while (retries) { |
77626355 BC |
872 | /* Look up the rate and other info used for each tx attempt. |
873 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
874 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
875 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
876 | &tbl_type, &rs_index); |
877 | ||
77626355 BC |
878 | /* If type matches "search" table, |
879 | * add failure to "search" history */ | |
b481de9c | 880 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 881 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
882 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
883 | if (search_tbl->expected_tpt) | |
884 | tpt = search_tbl->expected_tpt[rs_index]; | |
885 | else | |
886 | tpt = 0; | |
99556438 | 887 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
888 | |
889 | /* Else if type matches "current/active" table, | |
890 | * add failure to "current/active" history */ | |
b481de9c | 891 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 892 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
893 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
894 | if (curr_tbl->expected_tpt) | |
895 | tpt = curr_tbl->expected_tpt[rs_index]; | |
896 | else | |
897 | tpt = 0; | |
99556438 | 898 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 899 | } |
77626355 BC |
900 | |
901 | /* If not searching for a new mode, increment failed counter | |
902 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
903 | if (lq_sta->stay_in_tbl) |
904 | lq_sta->total_failed++; | |
b481de9c ZY |
905 | --retries; |
906 | index++; | |
907 | ||
908 | } | |
909 | ||
77626355 BC |
910 | /* |
911 | * Find (by rate) the history window to update with final Tx attempt; | |
912 | * if Tx was successful first try, use original rate, | |
913 | * else look up the rate that was, finally, successful. | |
914 | */ | |
39e88504 GC |
915 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
916 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 917 | |
77626355 | 918 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 919 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 920 | |
77626355 BC |
921 | /* If type matches "search" table, |
922 | * add final tx status to "search" history */ | |
b481de9c | 923 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 924 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
925 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
926 | if (search_tbl->expected_tpt) | |
927 | tpt = search_tbl->expected_tpt[rs_index]; | |
928 | else | |
929 | tpt = 0; | |
e039fa4a | 930 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 931 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
932 | info->status.ampdu_ack_len, |
933 | info->status.ampdu_ack_map); | |
99556438 RR |
934 | else |
935 | rs_collect_tx_data(search_win, rs_index, tpt, | |
936 | 1, status); | |
77626355 BC |
937 | /* Else if type matches "current/active" table, |
938 | * add final tx status to "current/active" history */ | |
b481de9c | 939 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 940 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
941 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
942 | if (curr_tbl->expected_tpt) | |
943 | tpt = curr_tbl->expected_tpt[rs_index]; | |
944 | else | |
945 | tpt = 0; | |
e039fa4a | 946 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 947 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
948 | info->status.ampdu_ack_len, |
949 | info->status.ampdu_ack_map); | |
99556438 RR |
950 | else |
951 | rs_collect_tx_data(window, rs_index, tpt, | |
952 | 1, status); | |
b481de9c ZY |
953 | } |
954 | ||
77626355 BC |
955 | /* If not searching for new mode, increment success/failed counter |
956 | * ... these help determine when to start searching again */ | |
c33104f0 | 957 | if (lq_sta->stay_in_tbl) { |
e039fa4a JB |
958 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
959 | lq_sta->total_success += info->status.ampdu_ack_map; | |
99556438 | 960 | lq_sta->total_failed += |
e039fa4a | 961 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
962 | } else { |
963 | if (status) | |
964 | lq_sta->total_success++; | |
965 | else | |
966 | lq_sta->total_failed++; | |
967 | } | |
b481de9c ZY |
968 | } |
969 | ||
77626355 | 970 | /* See if there's a better rate or modulation mode to try. */ |
b481de9c | 971 | rs_rate_scale_perform(priv, dev, hdr, sta); |
f4d6082d | 972 | out: |
d0709a65 | 973 | rcu_read_unlock(); |
b481de9c ZY |
974 | return; |
975 | } | |
976 | ||
77626355 BC |
977 | /* |
978 | * Begin a period of staying with a selected modulation mode. | |
979 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
980 | * Set frame tx success limits according to legacy vs. high-throughput, | |
981 | * and reset overall (spanning all rates) tx success history statistics. | |
982 | * These control how long we stay using same modulation mode before | |
983 | * searching for a new mode. | |
984 | */ | |
bf403db8 | 985 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
c33104f0 | 986 | struct iwl4965_lq_sta *lq_sta) |
b481de9c | 987 | { |
eecd6e57 | 988 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 989 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 990 | if (is_legacy) { |
c33104f0 TW |
991 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
992 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
993 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 994 | } else { |
c33104f0 TW |
995 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
996 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
997 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 998 | } |
c33104f0 TW |
999 | lq_sta->table_count = 0; |
1000 | lq_sta->total_failed = 0; | |
1001 | lq_sta->total_success = 0; | |
b481de9c ZY |
1002 | } |
1003 | ||
77626355 BC |
1004 | /* |
1005 | * Find correct throughput table for given mode of modulation | |
1006 | */ | |
eecd6e57 | 1007 | static void rs_set_expected_tpt_table(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 1008 | struct iwl4965_scale_tbl_info *tbl) |
b481de9c ZY |
1009 | { |
1010 | if (is_legacy(tbl->lq_type)) { | |
1011 | if (!is_a_band(tbl->lq_type)) | |
1012 | tbl->expected_tpt = expected_tpt_G; | |
1013 | else | |
1014 | tbl->expected_tpt = expected_tpt_A; | |
1015 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1016 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1017 | if (tbl->is_SGI) |
1018 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1019 | else | |
1020 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1021 | else if (tbl->is_SGI) | |
1022 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1023 | else | |
1024 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1025 | ||
fde0db31 | 1026 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1027 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1028 | if (tbl->is_SGI) |
1029 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1030 | else | |
1031 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1032 | else if (tbl->is_SGI) | |
1033 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1034 | else | |
1035 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1036 | } else | |
1037 | tbl->expected_tpt = expected_tpt_G; | |
1038 | } | |
1039 | ||
77626355 BC |
1040 | /* |
1041 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1042 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1043 | * above the current measured throughput of "active" mode, to give new mode | |
1044 | * a fair chance to prove itself without too many challenges. | |
1045 | * | |
1046 | * This gets called when transitioning to more aggressive modulation | |
1047 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1048 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1049 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1050 | * bit rate will typically need to increase, but not if performance was bad. | |
1051 | */ | |
c79dd5b5 | 1052 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
c33104f0 | 1053 | struct iwl4965_lq_sta *lq_sta, |
77626355 | 1054 | struct iwl4965_scale_tbl_info *tbl, /* "search" */ |
f935a6da | 1055 | u16 rate_mask, s8 index) |
b481de9c | 1056 | { |
77626355 | 1057 | /* "active" values */ |
bb8c093b | 1058 | struct iwl4965_scale_tbl_info *active_tbl = |
c33104f0 | 1059 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1060 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1061 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1062 | |
1063 | /* expected "search" throughput */ | |
1064 | s32 *tpt_tbl = tbl->expected_tpt; | |
1065 | ||
1066 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1067 | u16 high_low; |
f935a6da | 1068 | s8 rate = index; |
b481de9c ZY |
1069 | |
1070 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1071 | ||
1072 | for (; ;) { | |
bf403db8 EK |
1073 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1074 | tbl->lq_type); | |
b481de9c ZY |
1075 | |
1076 | low = high_low & 0xff; | |
1077 | high = (high_low >> 8) & 0xff; | |
1078 | ||
77626355 BC |
1079 | /* |
1080 | * Lower the "search" bit rate, to give new "search" mode | |
1081 | * approximately the same throughput as "active" if: | |
1082 | * | |
1083 | * 1) "Active" mode has been working modestly well (but not | |
1084 | * great), and expected "search" throughput (under perfect | |
1085 | * conditions) at candidate rate is above the actual | |
1086 | * measured "active" throughput (but less than expected | |
1087 | * "active" throughput under perfect conditions). | |
1088 | * OR | |
1089 | * 2) "Active" mode has been working perfectly or very well | |
1090 | * and expected "search" throughput (under perfect | |
1091 | * conditions) at candidate rate is above expected | |
1092 | * "active" throughput (under perfect conditions). | |
1093 | */ | |
c33104f0 | 1094 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1095 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1096 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1097 | (tpt_tbl[rate] <= active_tpt))) || | |
1098 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1099 | (tpt_tbl[rate] > active_tpt))) { | |
1100 | ||
77626355 BC |
1101 | /* (2nd or later pass) |
1102 | * If we've already tried to raise the rate, and are | |
1103 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1104 | if (start_hi != IWL_RATE_INVALID) { |
1105 | new_rate = start_hi; | |
1106 | break; | |
1107 | } | |
77626355 | 1108 | |
b481de9c | 1109 | new_rate = rate; |
77626355 BC |
1110 | |
1111 | /* Loop again with lower rate */ | |
b481de9c ZY |
1112 | if (low != IWL_RATE_INVALID) |
1113 | rate = low; | |
77626355 BC |
1114 | |
1115 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1116 | else |
1117 | break; | |
77626355 BC |
1118 | |
1119 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1120 | } else { |
77626355 BC |
1121 | /* (2nd or later pass) |
1122 | * If we've already tried to lower the rate, and are | |
1123 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1124 | if (new_rate != IWL_RATE_INVALID) |
1125 | break; | |
77626355 BC |
1126 | |
1127 | /* Loop again with higher rate */ | |
b481de9c ZY |
1128 | else if (high != IWL_RATE_INVALID) { |
1129 | start_hi = high; | |
1130 | rate = high; | |
77626355 BC |
1131 | |
1132 | /* Higher rate not available, use the original */ | |
b481de9c | 1133 | } else { |
b481de9c ZY |
1134 | break; |
1135 | } | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | return new_rate; | |
1140 | } | |
b481de9c | 1141 | |
77626355 BC |
1142 | /* |
1143 | * Set up search table for MIMO | |
1144 | */ | |
fde0db31 | 1145 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
c33104f0 | 1146 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1147 | struct ieee80211_conf *conf, |
1148 | struct sta_info *sta, | |
bb8c093b | 1149 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1150 | { |
b481de9c ZY |
1151 | u16 rate_mask; |
1152 | s32 rate; | |
c33104f0 | 1153 | s8 is_green = lq_sta->is_green; |
b481de9c | 1154 | |
270243a5 RR |
1155 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1156 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1157 | return -1; |
1158 | ||
270243a5 | 1159 | if (priv->current_ht_config.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) |
b481de9c ZY |
1160 | return -1; |
1161 | ||
77626355 | 1162 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1163 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1164 | return -1; |
1165 | ||
eecd6e57 | 1166 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1167 | |
1168 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1169 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1170 | tbl->action = 0; |
39e88504 GC |
1171 | rate_mask = lq_sta->active_mimo2_rate; |
1172 | ||
270243a5 | 1173 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1174 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1175 | tbl->is_fat = 1; |
1176 | else | |
1177 | tbl->is_fat = 0; | |
1178 | ||
39e88504 | 1179 | /* FIXME: - don't toggle SGI here |
b481de9c | 1180 | if (tbl->is_fat) { |
270243a5 | 1181 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1182 | tbl->is_SGI = 1; |
1183 | else | |
1184 | tbl->is_SGI = 0; | |
270243a5 | 1185 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1186 | tbl->is_SGI = 1; |
1187 | else | |
1188 | tbl->is_SGI = 0; | |
39e88504 | 1189 | */ |
b481de9c | 1190 | |
eecd6e57 | 1191 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1192 | |
f935a6da | 1193 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1194 | |
eecd6e57 | 1195 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1196 | |
1197 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1198 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1199 | rate, rate_mask); |
b481de9c | 1200 | return -1; |
39e88504 GC |
1201 | } |
1202 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); | |
b481de9c | 1203 | |
eecd6e57 | 1204 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1205 | tbl->current_rate, is_green); |
dc2453ae | 1206 | return 0; |
fde0db31 | 1207 | } |
b481de9c | 1208 | |
77626355 BC |
1209 | /* |
1210 | * Set up search table for SISO | |
1211 | */ | |
c79dd5b5 | 1212 | static int rs_switch_to_siso(struct iwl_priv *priv, |
c33104f0 | 1213 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1214 | struct ieee80211_conf *conf, |
1215 | struct sta_info *sta, | |
bb8c093b | 1216 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1217 | { |
b481de9c | 1218 | u16 rate_mask; |
c33104f0 | 1219 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1220 | s32 rate; |
1221 | ||
270243a5 RR |
1222 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1223 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1224 | return -1; |
1225 | ||
eecd6e57 | 1226 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1227 | |
c33104f0 | 1228 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1229 | tbl->lq_type = LQ_SISO; |
1230 | tbl->action = 0; | |
39e88504 | 1231 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1232 | |
270243a5 RR |
1233 | if (priv->current_ht_config.supported_chan_width |
1234 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1235 | tbl->is_fat = 1; |
1236 | else | |
1237 | tbl->is_fat = 0; | |
1238 | ||
39e88504 | 1239 | /* FIXME: - don't toggle SGI here |
b481de9c | 1240 | if (tbl->is_fat) { |
270243a5 | 1241 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1242 | tbl->is_SGI = 1; |
1243 | else | |
1244 | tbl->is_SGI = 0; | |
270243a5 | 1245 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1246 | tbl->is_SGI = 1; |
1247 | else | |
1248 | tbl->is_SGI = 0; | |
39e88504 | 1249 | */ |
b481de9c ZY |
1250 | |
1251 | if (is_green) | |
39e88504 | 1252 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1253 | |
eecd6e57 | 1254 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1255 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1256 | |
eecd6e57 | 1257 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1258 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1259 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1260 | rate, rate_mask); |
1261 | return -1; | |
1262 | } | |
39e88504 | 1263 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); |
eecd6e57 | 1264 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1265 | tbl->current_rate, is_green); |
403ab56b | 1266 | return 0; |
b481de9c ZY |
1267 | } |
1268 | ||
77626355 BC |
1269 | /* |
1270 | * Try to switch to new modulation mode from legacy | |
1271 | */ | |
c79dd5b5 | 1272 | static int rs_move_legacy_other(struct iwl_priv *priv, |
c33104f0 | 1273 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1274 | struct ieee80211_conf *conf, |
1275 | struct sta_info *sta, | |
b481de9c ZY |
1276 | int index) |
1277 | { | |
bb8c093b | 1278 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1279 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1280 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1281 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1282 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1283 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1284 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1285 | u8 start_action = tbl->action; |
fde0db31 GC |
1286 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1287 | int ret = 0; | |
b481de9c ZY |
1288 | |
1289 | for (; ;) { | |
1290 | switch (tbl->action) { | |
1291 | case IWL_LEGACY_SWITCH_ANTENNA: | |
f935a6da | 1292 | IWL_DEBUG_RATE("LQ: Legacy toggle Antenna\n"); |
b481de9c | 1293 | |
c33104f0 | 1294 | lq_sta->action_counter++; |
77626355 BC |
1295 | |
1296 | /* Don't change antenna if success has been great */ | |
b481de9c ZY |
1297 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1298 | break; | |
77626355 | 1299 | |
77626355 | 1300 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1301 | memcpy(search_tbl, tbl, sz); |
1302 | ||
aade00ce GC |
1303 | if (rs_toggle_antenna(valid_tx_ant, |
1304 | &search_tbl->current_rate, search_tbl)) { | |
aade00ce GC |
1305 | lq_sta->search_better_tbl = 1; |
1306 | goto out; | |
1307 | } | |
a5e8b505 | 1308 | break; |
b481de9c | 1309 | case IWL_LEGACY_SWITCH_SISO: |
eecd6e57 | 1310 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1311 | |
1312 | /* Set up search table to try SISO */ | |
b481de9c | 1313 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1314 | search_tbl->is_SGI = 0; |
c33104f0 | 1315 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1316 | search_tbl, index); |
dc2453ae | 1317 | if (!ret) { |
c33104f0 TW |
1318 | lq_sta->search_better_tbl = 1; |
1319 | lq_sta->action_counter = 0; | |
b481de9c | 1320 | goto out; |
dc2453ae | 1321 | } |
b481de9c ZY |
1322 | |
1323 | break; | |
fde0db31 | 1324 | case IWL_LEGACY_SWITCH_MIMO2: |
eecd6e57 | 1325 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1326 | |
1327 | /* Set up search table to try MIMO */ | |
b481de9c | 1328 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1329 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1330 | search_tbl->ant_type = ANT_AB;/*FIXME:RS*/ |
1331 | /*FIXME:RS:need to check ant validity*/ | |
1332 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1333 | search_tbl, index); |
dc2453ae | 1334 | if (!ret) { |
c33104f0 TW |
1335 | lq_sta->search_better_tbl = 1; |
1336 | lq_sta->action_counter = 0; | |
b481de9c | 1337 | goto out; |
dc2453ae | 1338 | } |
b481de9c ZY |
1339 | break; |
1340 | } | |
1341 | tbl->action++; | |
fde0db31 | 1342 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1343 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1344 | ||
1345 | if (tbl->action == start_action) | |
1346 | break; | |
1347 | ||
1348 | } | |
1349 | return 0; | |
1350 | ||
1351 | out: | |
1352 | tbl->action++; | |
fde0db31 | 1353 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1354 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1355 | return 0; | |
1356 | ||
1357 | } | |
1358 | ||
77626355 BC |
1359 | /* |
1360 | * Try to switch to new modulation mode from SISO | |
1361 | */ | |
c79dd5b5 | 1362 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
c33104f0 | 1363 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1364 | struct ieee80211_conf *conf, |
1365 | struct sta_info *sta, | |
b481de9c ZY |
1366 | int index) |
1367 | { | |
c33104f0 | 1368 | u8 is_green = lq_sta->is_green; |
bb8c093b | 1369 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1370 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1371 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1372 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1373 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1374 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1375 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1376 | u8 start_action = tbl->action; |
fde0db31 GC |
1377 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1378 | int ret; | |
b481de9c ZY |
1379 | |
1380 | for (;;) { | |
c33104f0 | 1381 | lq_sta->action_counter++; |
b481de9c ZY |
1382 | switch (tbl->action) { |
1383 | case IWL_SISO_SWITCH_ANTENNA: | |
eecd6e57 | 1384 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
b481de9c ZY |
1385 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1386 | break; | |
b481de9c ZY |
1387 | |
1388 | memcpy(search_tbl, tbl, sz); | |
aade00ce GC |
1389 | if (rs_toggle_antenna(valid_tx_ant, |
1390 | &search_tbl->current_rate, search_tbl)) { | |
1391 | lq_sta->search_better_tbl = 1; | |
1392 | goto out; | |
1393 | } | |
a5e8b505 | 1394 | break; |
fde0db31 | 1395 | case IWL_SISO_SWITCH_MIMO2: |
a5e8b505 | 1396 | IWL_DEBUG_RATE("LQ: SISO switch to MIMO2\n"); |
b481de9c | 1397 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1398 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1399 | search_tbl->ant_type = ANT_AB; /*FIXME:RS*/ |
1400 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1401 | search_tbl, index); |
dc2453ae | 1402 | if (!ret) { |
c33104f0 | 1403 | lq_sta->search_better_tbl = 1; |
b481de9c | 1404 | goto out; |
dc2453ae | 1405 | } |
b481de9c ZY |
1406 | break; |
1407 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1408 | if (!tbl->is_fat && |
1409 | !(priv->current_ht_config.sgf & | |
1410 | HT_SHORT_GI_20MHZ)) | |
1411 | break; | |
1412 | if (tbl->is_fat && | |
1413 | !(priv->current_ht_config.sgf & | |
1414 | HT_SHORT_GI_40MHZ)) | |
1415 | break; | |
1416 | ||
eecd6e57 | 1417 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1418 | |
b481de9c | 1419 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1420 | if (is_green) { |
1421 | if (!tbl->is_SGI) | |
1422 | break; | |
1423 | else | |
1424 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1425 | } |
39e88504 | 1426 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1427 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1428 | if (tbl->is_SGI) { |
1429 | s32 tpt = lq_sta->last_tpt / 100; | |
1430 | if (tpt >= search_tbl->expected_tpt[index]) | |
1431 | break; | |
1432 | } | |
1433 | search_tbl->current_rate = rate_n_flags_from_tbl( | |
1434 | search_tbl, index, is_green); | |
1435 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1436 | goto out; |
1437 | } | |
1438 | tbl->action++; | |
1439 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1440 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1441 | ||
1442 | if (tbl->action == start_action) | |
1443 | break; | |
1444 | } | |
1445 | return 0; | |
1446 | ||
1447 | out: | |
1448 | tbl->action++; | |
1449 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1450 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1451 | return 0; | |
1452 | } | |
1453 | ||
77626355 BC |
1454 | /* |
1455 | * Try to switch to new modulation mode from MIMO | |
1456 | */ | |
c79dd5b5 | 1457 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
c33104f0 | 1458 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1459 | struct ieee80211_conf *conf, |
1460 | struct sta_info *sta, | |
b481de9c ZY |
1461 | int index) |
1462 | { | |
c33104f0 | 1463 | s8 is_green = lq_sta->is_green; |
bb8c093b | 1464 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1465 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1466 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1467 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1468 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - |
1469 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1470 | u8 start_action = tbl->action; |
aade00ce GC |
1471 | /*u8 valid_tx_ant = priv->hw_params.valid_tx_ant;*/ |
1472 | int ret; | |
b481de9c ZY |
1473 | |
1474 | for (;;) { | |
c33104f0 | 1475 | lq_sta->action_counter++; |
b481de9c ZY |
1476 | switch (tbl->action) { |
1477 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1478 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
eecd6e57 | 1479 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1480 | |
77626355 | 1481 | /* Set up new search table for SISO */ |
b481de9c | 1482 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1483 | |
1484 | /*FIXME:RS:need to check ant validity + C*/ | |
b481de9c | 1485 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) |
fde0db31 | 1486 | search_tbl->ant_type = ANT_A; |
b481de9c | 1487 | else |
fde0db31 | 1488 | search_tbl->ant_type = ANT_B; |
b481de9c | 1489 | |
c33104f0 | 1490 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1491 | search_tbl, index); |
dc2453ae | 1492 | if (!ret) { |
c33104f0 | 1493 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1494 | goto out; |
1495 | } | |
1496 | break; | |
1497 | ||
1498 | case IWL_MIMO_SWITCH_GI: | |
a9841013 EG |
1499 | if (!tbl->is_fat && |
1500 | !(priv->current_ht_config.sgf & | |
1501 | HT_SHORT_GI_20MHZ)) | |
1502 | break; | |
1503 | if (tbl->is_fat && | |
1504 | !(priv->current_ht_config.sgf & | |
1505 | HT_SHORT_GI_40MHZ)) | |
1506 | break; | |
1507 | ||
eecd6e57 | 1508 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1509 | |
1510 | /* Set up new search table for MIMO */ | |
b481de9c | 1511 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1512 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1513 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1514 | /* |
1515 | * If active table already uses the fastest possible | |
1516 | * modulation (dual stream with short guard interval), | |
1517 | * and it's working well, there's no need to look | |
1518 | * for a better type of modulation! | |
1519 | */ | |
39e88504 | 1520 | if (tbl->is_SGI) { |
c33104f0 | 1521 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1522 | if (tpt >= search_tbl->expected_tpt[index]) |
1523 | break; | |
b481de9c | 1524 | } |
39e88504 GC |
1525 | search_tbl->current_rate = rate_n_flags_from_tbl( |
1526 | search_tbl, index, is_green); | |
1527 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1528 | goto out; |
1529 | ||
1530 | } | |
1531 | tbl->action++; | |
1532 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1533 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1534 | ||
1535 | if (tbl->action == start_action) | |
1536 | break; | |
1537 | } | |
1538 | ||
1539 | return 0; | |
1540 | out: | |
1541 | tbl->action++; | |
1542 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1543 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1544 | return 0; | |
1545 | ||
1546 | } | |
1547 | ||
77626355 BC |
1548 | /* |
1549 | * Check whether we should continue using same modulation mode, or | |
1550 | * begin search for a new mode, based on: | |
1551 | * 1) # tx successes or failures while using this mode | |
1552 | * 2) # times calling this function | |
1553 | * 3) elapsed time in this mode (not used, for now) | |
1554 | */ | |
c33104f0 | 1555 | static void rs_stay_in_table(struct iwl4965_lq_sta *lq_sta) |
b481de9c | 1556 | { |
bb8c093b | 1557 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c ZY |
1558 | int i; |
1559 | int active_tbl; | |
1560 | int flush_interval_passed = 0; | |
bf403db8 | 1561 | struct iwl_priv *priv; |
b481de9c | 1562 | |
bf403db8 | 1563 | priv = lq_sta->drv; |
c33104f0 | 1564 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1565 | |
c33104f0 | 1566 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1567 | |
77626355 | 1568 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1569 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1570 | |
77626355 | 1571 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1572 | if (lq_sta->flush_timer) |
b481de9c ZY |
1573 | flush_interval_passed = |
1574 | time_after(jiffies, | |
c33104f0 | 1575 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1576 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1577 | ||
77626355 BC |
1578 | /* |
1579 | * Check if we should allow search for new modulation mode. | |
1580 | * If many frames have failed or succeeded, or we've used | |
1581 | * this same modulation for a long time, allow search, and | |
1582 | * reset history stats that keep track of whether we should | |
1583 | * allow a new search. Also (below) reset all bitmaps and | |
1584 | * stats in active history. | |
1585 | */ | |
c33104f0 TW |
1586 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1587 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1588 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1589 | && (flush_interval_passed))) { |
eecd6e57 | 1590 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1591 | lq_sta->total_failed, |
1592 | lq_sta->total_success, | |
b481de9c | 1593 | flush_interval_passed); |
77626355 BC |
1594 | |
1595 | /* Allow search for new mode */ | |
c33104f0 TW |
1596 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1597 | lq_sta->total_failed = 0; | |
1598 | lq_sta->total_success = 0; | |
1599 | lq_sta->flush_timer = 0; | |
77626355 BC |
1600 | |
1601 | /* | |
1602 | * Else if we've used this modulation mode enough repetitions | |
1603 | * (regardless of elapsed time or success/failure), reset | |
1604 | * history bitmaps and rate-specific stats for all rates in | |
1605 | * active table. | |
1606 | */ | |
403ab56b | 1607 | } else { |
c33104f0 TW |
1608 | lq_sta->table_count++; |
1609 | if (lq_sta->table_count >= | |
1610 | lq_sta->table_count_limit) { | |
1611 | lq_sta->table_count = 0; | |
b481de9c | 1612 | |
eecd6e57 | 1613 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1614 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1615 | rs_rate_scale_clear_window( | |
1616 | &(tbl->win[i])); | |
1617 | } | |
1618 | } | |
1619 | ||
77626355 BC |
1620 | /* If transitioning to allow "search", reset all history |
1621 | * bitmaps and stats in active table (this will become the new | |
1622 | * "search" table). */ | |
c33104f0 | 1623 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1624 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1625 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1626 | } | |
1627 | } | |
1628 | } | |
1629 | ||
77626355 BC |
1630 | /* |
1631 | * Do rate scaling and search for new modulation mode. | |
1632 | */ | |
c79dd5b5 | 1633 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
1634 | struct net_device *dev, |
1635 | struct ieee80211_hdr *hdr, | |
1636 | struct sta_info *sta) | |
1637 | { | |
270243a5 RR |
1638 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
1639 | struct ieee80211_hw *hw = local_to_hw(local); | |
1640 | struct ieee80211_conf *conf = &hw->conf; | |
b481de9c ZY |
1641 | int low = IWL_RATE_INVALID; |
1642 | int high = IWL_RATE_INVALID; | |
1643 | int index; | |
1644 | int i; | |
bb8c093b | 1645 | struct iwl4965_rate_scale_data *window = NULL; |
b481de9c ZY |
1646 | int current_tpt = IWL_INVALID_VALUE; |
1647 | int low_tpt = IWL_INVALID_VALUE; | |
1648 | int high_tpt = IWL_INVALID_VALUE; | |
1649 | u32 fail_count; | |
1650 | s8 scale_action = 0; | |
1651 | u16 fc, rate_mask; | |
1652 | u8 update_lq = 0; | |
c33104f0 | 1653 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 1654 | struct iwl4965_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1655 | u16 rate_scale_index_msk = 0; |
39e88504 | 1656 | u32 rate; |
b481de9c ZY |
1657 | u8 is_green = 0; |
1658 | u8 active_tbl = 0; | |
1659 | u8 done_search = 0; | |
1660 | u16 high_low; | |
a5e8b505 | 1661 | s32 sr; |
0c11b4de | 1662 | u8 tid = MAX_TID_COUNT; |
b481de9c ZY |
1663 | |
1664 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1665 | ||
1666 | fc = le16_to_cpu(hdr->frame_control); | |
1667 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1668 | /* Send management frames and broadcast/multicast data using | |
1669 | * lowest rate. */ | |
1670 | /* TODO: this could probably be improved.. */ | |
1671 | return; | |
1672 | } | |
1673 | ||
1674 | if (!sta || !sta->rate_ctrl_priv) | |
1675 | return; | |
1676 | ||
1677 | if (!priv->lq_mngr.lq_ready) { | |
1678 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1679 | return; | |
1680 | } | |
c33104f0 | 1681 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c | 1682 | |
54dbb525 | 1683 | rs_tl_add_packet(lq_sta, hdr); |
77626355 BC |
1684 | /* |
1685 | * Select rate-scale / modulation-mode table to work with in | |
1686 | * the rest of this function: "search" if searching for better | |
1687 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1688 | */ | |
c33104f0 TW |
1689 | if (!lq_sta->search_better_tbl) |
1690 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1691 | else |
c33104f0 | 1692 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1693 | |
c33104f0 TW |
1694 | tbl = &(lq_sta->lq_info[active_tbl]); |
1695 | is_green = lq_sta->is_green; | |
b481de9c | 1696 | |
77626355 | 1697 | /* current tx rate */ |
8318d78a | 1698 | index = sta->last_txrate_idx; |
b481de9c ZY |
1699 | |
1700 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1701 | tbl->lq_type); | |
1702 | ||
77626355 | 1703 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1704 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1705 | |
1706 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1707 | ||
1708 | /* mask with station rate restriction */ | |
1709 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1710 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1711 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1712 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1713 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1714 | else |
1715 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1716 | lq_sta->supp_rates); |
b481de9c ZY |
1717 | |
1718 | } else | |
1719 | rate_scale_index_msk = rate_mask; | |
1720 | ||
1721 | if (!rate_scale_index_msk) | |
1722 | rate_scale_index_msk = rate_mask; | |
1723 | ||
07bc28ed GC |
1724 | if (!((1 << index) & rate_scale_index_msk)) { |
1725 | IWL_ERROR("Current Rate is not valid\n"); | |
1726 | return; | |
b481de9c ZY |
1727 | } |
1728 | ||
77626355 | 1729 | /* Get expected throughput table and history window for current rate */ |
07bc28ed GC |
1730 | if (!tbl->expected_tpt) { |
1731 | IWL_ERROR("tbl->expected_tpt is NULL\n"); | |
1732 | return; | |
1733 | } | |
b481de9c ZY |
1734 | |
1735 | window = &(tbl->win[index]); | |
1736 | ||
77626355 BC |
1737 | /* |
1738 | * If there is not enough history to calculate actual average | |
1739 | * throughput, keep analyzing results of more tx frames, without | |
1740 | * changing rate or mode (bypass most of the rest of this function). | |
1741 | * Set up new rate table in uCode only if old rate is not supported | |
1742 | * in current association (use new rate found above). | |
1743 | */ | |
b481de9c | 1744 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1745 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1746 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1747 | IWL_DEBUG_RATE("LQ: still below TH. succ=%d total=%d " | |
b481de9c ZY |
1748 | "for index %d\n", |
1749 | window->success_counter, window->counter, index); | |
77626355 BC |
1750 | |
1751 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1752 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1753 | |
1754 | /* Should we stay with this modulation mode, | |
1755 | * or search for a new one? */ | |
c33104f0 | 1756 | rs_stay_in_table(lq_sta); |
77626355 | 1757 | |
b481de9c ZY |
1758 | goto out; |
1759 | ||
77626355 BC |
1760 | /* Else we have enough samples; calculate estimate of |
1761 | * actual average throughput */ | |
07bc28ed GC |
1762 | } else { |
1763 | /*FIXME:RS remove this else if we don't get this error*/ | |
1764 | if (window->average_tpt != ((window->success_ratio * | |
1765 | tbl->expected_tpt[index] + 64) / 128)) { | |
1766 | IWL_ERROR("expected_tpt should have been calculated" | |
1767 | " by now\n"); | |
1768 | window->average_tpt = ((window->success_ratio * | |
b481de9c | 1769 | tbl->expected_tpt[index] + 64) / 128); |
07bc28ed GC |
1770 | } |
1771 | } | |
b481de9c | 1772 | |
77626355 | 1773 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1774 | if (lq_sta->search_better_tbl) { |
b481de9c | 1775 | |
77626355 BC |
1776 | /* If good success, continue using the "search" mode; |
1777 | * no need to send new link quality command, since we're | |
1778 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1779 | if (window->average_tpt > lq_sta->last_tpt) { |
1780 | ||
1781 | IWL_DEBUG_RATE("LQ: SWITCHING TO CURRENT TABLE " | |
1782 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1783 | window->success_ratio, | |
1784 | window->average_tpt, | |
1785 | lq_sta->last_tpt); | |
1786 | ||
1787 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1788 | lq_sta->enable_counter = 1; |
07bc28ed | 1789 | |
77626355 | 1790 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1791 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1792 | current_tpt = window->average_tpt; |
77626355 BC |
1793 | |
1794 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1795 | } else { |
07bc28ed GC |
1796 | |
1797 | IWL_DEBUG_RATE("LQ: GOING BACK TO THE OLD TABLE " | |
1798 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1799 | window->success_ratio, | |
1800 | window->average_tpt, | |
1801 | lq_sta->last_tpt); | |
1802 | ||
77626355 | 1803 | /* Nullify "search" table */ |
b481de9c | 1804 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1805 | |
1806 | /* Revert to "active" table */ | |
c33104f0 TW |
1807 | active_tbl = lq_sta->active_tbl; |
1808 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1809 | |
77626355 | 1810 | /* Revert to "active" rate and throughput info */ |
17744ff6 | 1811 | index = iwl4965_hwrate_to_plcp_idx( |
39e88504 | 1812 | tbl->current_rate); |
c33104f0 | 1813 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1814 | |
77626355 | 1815 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1816 | update_lq = 1; |
b481de9c | 1817 | } |
77626355 BC |
1818 | |
1819 | /* Either way, we've made a decision; modulation mode | |
1820 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1821 | lq_sta->search_better_tbl = 0; |
77626355 | 1822 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1823 | goto lq_update; |
1824 | } | |
1825 | ||
77626355 BC |
1826 | /* (Else) not in search of better modulation mode, try for better |
1827 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1828 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1829 | tbl->lq_type); |
1830 | low = high_low & 0xff; | |
1831 | high = (high_low >> 8) & 0xff; | |
1832 | ||
a5e8b505 GC |
1833 | sr = window->success_ratio; |
1834 | ||
77626355 | 1835 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1836 | current_tpt = window->average_tpt; |
b481de9c ZY |
1837 | if (low != IWL_RATE_INVALID) |
1838 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1839 | if (high != IWL_RATE_INVALID) |
1840 | high_tpt = tbl->win[high].average_tpt; | |
1841 | ||
a5e8b505 | 1842 | scale_action = 0; |
b481de9c | 1843 | |
77626355 | 1844 | /* Too many failures, decrease rate */ |
a5e8b505 | 1845 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
b481de9c ZY |
1846 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
1847 | scale_action = -1; | |
77626355 BC |
1848 | |
1849 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 1850 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
1851 | (high_tpt == IWL_INVALID_VALUE)) { |
1852 | ||
1853 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
1854 | scale_action = 1; | |
1855 | else if (low != IWL_RATE_INVALID) | |
1856 | scale_action = -1; | |
1857 | } | |
77626355 BC |
1858 | |
1859 | /* Both adjacent throughputs are measured, but neither one has better | |
1860 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1861 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1862 | (high_tpt != IWL_INVALID_VALUE) && | |
1863 | (low_tpt < current_tpt) && | |
1864 | (high_tpt < current_tpt)) | |
1865 | scale_action = 0; | |
77626355 BC |
1866 | |
1867 | /* At least one adjacent rate's throughput is measured, | |
1868 | * and may have better performance. */ | |
b481de9c | 1869 | else { |
77626355 | 1870 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1871 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1872 | /* Higher rate has better throughput */ |
a5e8b505 GC |
1873 | if (high_tpt > current_tpt && |
1874 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 1875 | scale_action = 1; |
a5e8b505 | 1876 | } else { |
b481de9c ZY |
1877 | IWL_DEBUG_RATE |
1878 | ("decrease rate because of high tpt\n"); | |
1879 | scale_action = -1; | |
1880 | } | |
77626355 BC |
1881 | |
1882 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1883 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1884 | /* Lower rate has better throughput */ |
b481de9c ZY |
1885 | if (low_tpt > current_tpt) { |
1886 | IWL_DEBUG_RATE | |
1887 | ("decrease rate because of low tpt\n"); | |
1888 | scale_action = -1; | |
a5e8b505 | 1889 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 1890 | scale_action = 1; |
a5e8b505 | 1891 | } |
b481de9c ZY |
1892 | } |
1893 | } | |
1894 | ||
77626355 BC |
1895 | /* Sanity check; asked for decrease, but success rate or throughput |
1896 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
1897 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
1898 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 1899 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
1900 | scale_action = 0; |
1901 | ||
1902 | switch (scale_action) { | |
1903 | case -1: | |
77626355 | 1904 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1905 | if (low != IWL_RATE_INVALID) { |
1906 | update_lq = 1; | |
1907 | index = low; | |
1908 | } | |
1909 | break; | |
1910 | case 1: | |
77626355 | 1911 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1912 | if (high != IWL_RATE_INVALID) { |
1913 | update_lq = 1; | |
1914 | index = high; | |
1915 | } | |
1916 | ||
1917 | break; | |
1918 | case 0: | |
77626355 | 1919 | /* No change */ |
b481de9c ZY |
1920 | default: |
1921 | break; | |
1922 | } | |
1923 | ||
eecd6e57 | 1924 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1925 | "high %d type %d\n", |
1926 | index, scale_action, low, high, tbl->lq_type); | |
1927 | ||
a5e8b505 | 1928 | lq_update: |
77626355 | 1929 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1930 | if (update_lq) { |
39e88504 | 1931 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
07bc28ed | 1932 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1933 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1934 | } |
77626355 BC |
1935 | |
1936 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1937 | rs_stay_in_table(lq_sta); |
b481de9c | 1938 | |
77626355 BC |
1939 | /* |
1940 | * Search for new modulation mode if we're: | |
1941 | * 1) Not changing rates right now | |
1942 | * 2) Not just finishing up a search | |
1943 | * 3) Allowing a new search | |
1944 | */ | |
47cfd463 | 1945 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 1946 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1947 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1948 | |
77626355 BC |
1949 | /* Select a new "search" modulation mode to try. |
1950 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1951 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1952 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1953 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1954 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1955 | else |
c33104f0 | 1956 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1957 | |
77626355 | 1958 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 1959 | if (lq_sta->search_better_tbl) { |
77626355 | 1960 | /* Access the "search" table, clear its history. */ |
c33104f0 | 1961 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
1962 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1963 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1964 | ||
77626355 | 1965 | /* Use new "search" start rate */ |
17744ff6 | 1966 | index = iwl4965_hwrate_to_plcp_idx( |
39e88504 | 1967 | tbl->current_rate); |
b481de9c | 1968 | |
eecd6e57 | 1969 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 | 1970 | tbl->current_rate, index); |
07bc28ed | 1971 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 1972 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1973 | } |
b481de9c | 1974 | |
77626355 BC |
1975 | /* If the "active" (non-search) mode was legacy, |
1976 | * and we've tried switching antennas, | |
1977 | * but we haven't been able to try HT modes (not available), | |
1978 | * stay with best antenna legacy modulation for a while | |
1979 | * before next round of mode comparisons. */ | |
c33104f0 | 1980 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1981 | if (is_legacy(tbl1->lq_type) && |
270243a5 | 1982 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
c33104f0 TW |
1983 | (lq_sta->action_counter >= 1)) { |
1984 | lq_sta->action_counter = 0; | |
eecd6e57 | 1985 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
bf403db8 | 1986 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
1987 | } |
1988 | ||
77626355 BC |
1989 | /* If we're in an HT mode, and all 3 mode switch actions |
1990 | * have been tried and compared, stay in this best modulation | |
1991 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
1992 | if (lq_sta->enable_counter && |
1993 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
1994 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
1995 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
1996 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 1997 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 1998 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 1999 | } |
c33104f0 | 2000 | lq_sta->action_counter = 0; |
bf403db8 | 2001 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2002 | } |
77626355 BC |
2003 | |
2004 | /* | |
2005 | * Else, don't search for a new modulation mode. | |
2006 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2007 | * 1) Not changing rates right now | |
2008 | * 2) Not just finishing up a search | |
2009 | * 3) flush timer is empty | |
2010 | */ | |
b481de9c | 2011 | } else { |
c33104f0 TW |
2012 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2013 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2014 | } |
2015 | ||
2016 | out: | |
39e88504 | 2017 | tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green); |
b481de9c | 2018 | i = index; |
8318d78a | 2019 | sta->last_txrate_idx = i; |
b481de9c | 2020 | |
8318d78a | 2021 | /* sta->txrate_idx is an index to A mode rates which start |
b481de9c ZY |
2022 | * at IWL_FIRST_OFDM_RATE |
2023 | */ | |
8318d78a JB |
2024 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
2025 | sta->txrate_idx = i - IWL_FIRST_OFDM_RATE; | |
b481de9c | 2026 | else |
8318d78a | 2027 | sta->txrate_idx = i; |
b481de9c ZY |
2028 | |
2029 | return; | |
2030 | } | |
2031 | ||
2032 | ||
c79dd5b5 | 2033 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2034 | struct ieee80211_conf *conf, |
b481de9c ZY |
2035 | struct sta_info *sta) |
2036 | { | |
c33104f0 | 2037 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 2038 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c | 2039 | int rate_idx; |
aade00ce | 2040 | int i; |
39e88504 | 2041 | u32 rate; |
aade00ce GC |
2042 | u8 use_green = rs_use_green(priv, conf); |
2043 | u8 active_tbl = 0; | |
2044 | u8 valid_tx_ant; | |
b481de9c ZY |
2045 | |
2046 | if (!sta || !sta->rate_ctrl_priv) | |
2047 | goto out; | |
2048 | ||
c33104f0 | 2049 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2050 | i = sta->last_txrate_idx; |
b481de9c | 2051 | |
c33104f0 | 2052 | if ((lq_sta->lq.sta_id == 0xff) && |
b481de9c ZY |
2053 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
2054 | goto out; | |
2055 | ||
aade00ce GC |
2056 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2057 | ||
c33104f0 TW |
2058 | if (!lq_sta->search_better_tbl) |
2059 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2060 | else |
c33104f0 | 2061 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2062 | |
c33104f0 | 2063 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2064 | |
2065 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2066 | i = 0; | |
2067 | ||
fde0db31 | 2068 | /* FIXME:RS: This is also wrong in 4965 */ |
1826dcc0 | 2069 | rate = iwl_rates[i].plcp; |
39e88504 GC |
2070 | rate |= RATE_MCS_ANT_B_MSK; |
2071 | rate &= ~RATE_MCS_ANT_A_MSK; | |
b481de9c ZY |
2072 | |
2073 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2074 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2075 | |
fde0db31 | 2076 | tbl->ant_type = ANT_B; |
39e88504 | 2077 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2078 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2079 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2080 | |
39e88504 GC |
2081 | rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green); |
2082 | tbl->current_rate = rate; | |
eecd6e57 | 2083 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2084 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2085 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2086 | out: |
2087 | return; | |
2088 | } | |
2089 | ||
1abbe498 | 2090 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
8318d78a JB |
2091 | struct ieee80211_supported_band *sband, |
2092 | struct sk_buff *skb, | |
1abbe498 | 2093 | struct rate_selection *sel) |
b481de9c ZY |
2094 | { |
2095 | ||
2096 | int i; | |
2097 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
270243a5 | 2098 | struct ieee80211_conf *conf = &local->hw.conf; |
b481de9c ZY |
2099 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2100 | struct sta_info *sta; | |
2bc454b0 | 2101 | u16 fc; |
c79dd5b5 | 2102 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
c33104f0 | 2103 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2104 | |
58826351 | 2105 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2106 | |
d0709a65 JB |
2107 | rcu_read_lock(); |
2108 | ||
b481de9c ZY |
2109 | sta = sta_info_get(local, hdr->addr1); |
2110 | ||
2bc454b0 MW |
2111 | /* Send management frames and broadcast/multicast data using lowest |
2112 | * rate. */ | |
2113 | fc = le16_to_cpu(hdr->frame_control); | |
2114 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || | |
2115 | !sta || !sta->rate_ctrl_priv) { | |
2e92e6f2 | 2116 | sel->rate_idx = rate_lowest_index(local, sband, sta); |
f4d6082d | 2117 | goto out; |
b481de9c ZY |
2118 | } |
2119 | ||
c33104f0 | 2120 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2121 | i = sta->last_txrate_idx; |
b481de9c | 2122 | |
c33104f0 TW |
2123 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
2124 | !lq_sta->ibss_sta_added) { | |
947b13a7 | 2125 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
0795af57 | 2126 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
2127 | |
2128 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2129 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2130 | print_mac(mac, hdr->addr1)); | |
4f40e4d9 | 2131 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2132 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2133 | } |
2134 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2135 | lq_sta->lq.sta_id = sta_id; |
2136 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2137 | lq_sta->ibss_sta_added = 1; | |
270243a5 | 2138 | rs_initialize_lq(priv, conf, sta); |
b481de9c | 2139 | } |
c33104f0 | 2140 | if (!lq_sta->ibss_sta_added) |
b481de9c ZY |
2141 | goto done; |
2142 | } | |
2143 | ||
f4d6082d | 2144 | done: |
1abbe498 | 2145 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
2e92e6f2 | 2146 | sel->rate_idx = rate_lowest_index(local, sband, sta); |
f4d6082d | 2147 | goto out; |
1abbe498 | 2148 | } |
b481de9c | 2149 | |
2e92e6f2 JB |
2150 | if (sband->band == IEEE80211_BAND_5GHZ) |
2151 | i -= IWL_FIRST_OFDM_RATE; | |
2152 | sel->rate_idx = i; | |
f4d6082d TW |
2153 | out: |
2154 | rcu_read_unlock(); | |
b481de9c ZY |
2155 | } |
2156 | ||
bf403db8 | 2157 | static void *rs_alloc_sta(void *priv_rate, gfp_t gfp) |
b481de9c | 2158 | { |
c33104f0 | 2159 | struct iwl4965_lq_sta *lq_sta; |
bf403db8 | 2160 | struct iwl_priv *priv; |
b481de9c ZY |
2161 | int i, j; |
2162 | ||
bf403db8 | 2163 | priv = (struct iwl_priv *)priv_rate; |
b481de9c ZY |
2164 | IWL_DEBUG_RATE("create station rate scale window\n"); |
2165 | ||
c33104f0 | 2166 | lq_sta = kzalloc(sizeof(struct iwl4965_lq_sta), gfp); |
b481de9c | 2167 | |
c33104f0 | 2168 | if (lq_sta == NULL) |
b481de9c | 2169 | return NULL; |
c33104f0 | 2170 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2171 | |
63fddb9f | 2172 | |
b481de9c ZY |
2173 | for (j = 0; j < LQ_SIZE; j++) |
2174 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2175 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c | 2176 | |
c33104f0 | 2177 | return lq_sta; |
b481de9c ZY |
2178 | } |
2179 | ||
2180 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
2181 | struct ieee80211_local *local, | |
2182 | struct sta_info *sta) | |
2183 | { | |
2184 | int i, j; | |
270243a5 | 2185 | struct ieee80211_conf *conf = &local->hw.conf; |
8318d78a | 2186 | struct ieee80211_supported_band *sband; |
c79dd5b5 | 2187 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
c33104f0 | 2188 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
b481de9c | 2189 | |
8318d78a JB |
2190 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
2191 | ||
c33104f0 | 2192 | lq_sta->flush_timer = 0; |
8318d78a JB |
2193 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
2194 | sta->txrate_idx = 3; | |
b481de9c ZY |
2195 | for (j = 0; j < LQ_SIZE; j++) |
2196 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2197 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c | 2198 | |
07bc28ed | 2199 | IWL_DEBUG_RATE("LQ: *** rate scale global init ***\n"); |
b481de9c ZY |
2200 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2201 | * the lowest or the highest rate.. Could consider using RSSI from | |
2202 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2203 | * after assoc.. */ | |
2204 | ||
c33104f0 | 2205 | lq_sta->ibss_sta_added = 0; |
b481de9c | 2206 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { |
947b13a7 | 2207 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 JP |
2208 | DECLARE_MAC_BUF(mac); |
2209 | ||
b481de9c | 2210 | /* for IBSS the call are from tasklet */ |
eecd6e57 | 2211 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
0795af57 | 2212 | print_mac(mac, sta->addr)); |
b481de9c ZY |
2213 | |
2214 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2215 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2216 | print_mac(mac, sta->addr)); | |
4f40e4d9 | 2217 | sta_id = iwl_add_station_flags(priv, sta->addr, |
67d62035 | 2218 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2219 | } |
2220 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2221 | lq_sta->lq.sta_id = sta_id; |
2222 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2223 | } |
2224 | /* FIXME: this is w/a remove it later */ | |
2225 | priv->assoc_station_added = 1; | |
2226 | } | |
2227 | ||
77626355 | 2228 | /* Find highest tx rate supported by hardware and destination station */ |
8318d78a JB |
2229 | for (i = 0; i < sband->n_bitrates; i++) |
2230 | if (sta->supp_rates[sband->band] & BIT(i)) | |
2231 | sta->txrate_idx = i; | |
2232 | ||
2233 | sta->last_txrate_idx = sta->txrate_idx; | |
2234 | /* WTF is with this bogus comment? A doesn't have cck rates */ | |
77626355 | 2235 | /* For MODE_IEEE80211A, cck rates are at end of rate table */ |
8318d78a JB |
2236 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
2237 | sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
b481de9c | 2238 | |
c33104f0 | 2239 | lq_sta->is_dup = 0; |
c33104f0 | 2240 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2241 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2242 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2243 | lq_sta->band = priv->band; |
77626355 BC |
2244 | /* |
2245 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2246 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2247 | */ | |
263b5f5a RR |
2248 | lq_sta->active_siso_rate = conf->ht_conf.supp_mcs_set[0] << 1; |
2249 | lq_sta->active_siso_rate |= conf->ht_conf.supp_mcs_set[0] & 0x1; | |
c33104f0 | 2250 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2251 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2252 | |
77626355 | 2253 | /* Same here */ |
263b5f5a RR |
2254 | lq_sta->active_mimo2_rate = conf->ht_conf.supp_mcs_set[1] << 1; |
2255 | lq_sta->active_mimo2_rate |= conf->ht_conf.supp_mcs_set[1] & 0x1; | |
fde0db31 GC |
2256 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2257 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2258 | ||
263b5f5a RR |
2259 | lq_sta->active_mimo3_rate = conf->ht_conf.supp_mcs_set[2] << 1; |
2260 | lq_sta->active_mimo3_rate |= conf->ht_conf.supp_mcs_set[2] & 0x1; | |
fde0db31 GC |
2261 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2262 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2263 | ||
07bc28ed | 2264 | IWL_DEBUG_RATE("SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2265 | lq_sta->active_siso_rate, |
fde0db31 GC |
2266 | lq_sta->active_mimo2_rate, |
2267 | lq_sta->active_mimo3_rate); | |
2268 | ||
07bc28ed GC |
2269 | /* These values will be overriden later */ |
2270 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; | |
2271 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2272 | ||
0c11b4de RR |
2273 | /* as default allow aggregation for all tids */ |
2274 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
98d7e09a | 2275 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 2276 | lq_sta->drv = priv; |
98d7e09a | 2277 | #endif |
b481de9c ZY |
2278 | |
2279 | if (priv->assoc_station_added) | |
2280 | priv->lq_mngr.lq_ready = 1; | |
2281 | ||
270243a5 | 2282 | rs_initialize_lq(priv, conf, sta); |
b481de9c ZY |
2283 | } |
2284 | ||
fde0db31 GC |
2285 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
2286 | struct iwl4965_lq_sta *lq_sta, | |
07bc28ed | 2287 | u32 new_rate) |
b481de9c | 2288 | { |
aade00ce | 2289 | struct iwl4965_scale_tbl_info tbl_type; |
b481de9c | 2290 | int index = 0; |
b481de9c | 2291 | int rate_idx; |
1b696de2 | 2292 | int repeat_rate = 0; |
aade00ce | 2293 | u8 ant_toggle_cnt = 0; |
b481de9c | 2294 | u8 use_ht_possible = 1; |
aade00ce | 2295 | u8 valid_tx_ant = 0; |
07bc28ed | 2296 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2297 | |
77626355 | 2298 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2299 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2300 | |
39e88504 | 2301 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2302 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2303 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2304 | &tbl_type, &rate_idx); |
2305 | ||
77626355 | 2306 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2307 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2308 | ant_toggle_cnt = 1; |
1b696de2 | 2309 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2310 | } else { |
1b696de2 | 2311 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2312 | } |
b481de9c ZY |
2313 | |
2314 | lq_cmd->general_params.mimo_delimiter = | |
2315 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2316 | |
2317 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2318 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2319 | |
07bc28ed GC |
2320 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2321 | lq_cmd->general_params.single_stream_ant_msk = | |
2322 | tbl_type.ant_type; | |
2323 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2324 | lq_cmd->general_params.dual_stream_ant_msk = | |
2325 | tbl_type.ant_type; | |
2326 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2327 | |
2328 | index++; | |
1b696de2 | 2329 | repeat_rate--; |
b481de9c | 2330 | |
aade00ce GC |
2331 | if (priv) |
2332 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2333 | ||
77626355 | 2334 | /* Fill rest of rate table */ |
b481de9c | 2335 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2336 | /* Repeat initial/next rate. |
2337 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2338 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2339 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2340 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2341 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2342 | ant_toggle_cnt++; | |
2343 | else if (priv && | |
2344 | rs_toggle_antenna(valid_tx_ant, | |
2345 | &new_rate, &tbl_type)) | |
2346 | ant_toggle_cnt = 1; | |
2347 | } | |
98d7e09a | 2348 | |
77626355 | 2349 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2350 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2351 | |
2352 | /* Fill next table entry */ | |
b481de9c | 2353 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2354 | cpu_to_le32(new_rate); |
1b696de2 | 2355 | repeat_rate--; |
b481de9c ZY |
2356 | index++; |
2357 | } | |
2358 | ||
39e88504 | 2359 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2360 | &rate_idx); |
2361 | ||
77626355 BC |
2362 | /* Indicate to uCode which entries might be MIMO. |
2363 | * If initial rate was MIMO, this will finally end up | |
2364 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2365 | if (is_mimo(tbl_type.lq_type)) |
2366 | lq_cmd->general_params.mimo_delimiter = index; | |
2367 | ||
77626355 | 2368 | /* Get next rate */ |
39e88504 GC |
2369 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2370 | use_ht_possible); | |
b481de9c | 2371 | |
77626355 | 2372 | /* How many times should we repeat the next rate? */ |
b481de9c | 2373 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2374 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2375 | ant_toggle_cnt++; | |
2376 | else if (priv && | |
2377 | rs_toggle_antenna(valid_tx_ant, | |
2378 | &new_rate, &tbl_type)) | |
2379 | ant_toggle_cnt = 1; | |
2380 | ||
1b696de2 | 2381 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2382 | } else { |
1b696de2 | 2383 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2384 | } |
b481de9c | 2385 | |
77626355 BC |
2386 | /* Don't allow HT rates after next pass. |
2387 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2388 | use_ht_possible = 0; |
2389 | ||
77626355 | 2390 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2391 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2392 | |
2393 | /* Fill next table entry */ | |
39e88504 | 2394 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2395 | |
2396 | index++; | |
1b696de2 | 2397 | repeat_rate--; |
b481de9c ZY |
2398 | } |
2399 | ||
5e1dd8dc | 2400 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2401 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2402 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2403 | } |
2404 | ||
2405 | static void *rs_alloc(struct ieee80211_local *local) | |
2406 | { | |
2407 | return local->hw.priv; | |
2408 | } | |
2409 | /* rate scale requires free function to be implemented */ | |
2410 | static void rs_free(void *priv_rate) | |
2411 | { | |
2412 | return; | |
2413 | } | |
2414 | ||
2415 | static void rs_clear(void *priv_rate) | |
2416 | { | |
c79dd5b5 | 2417 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
b481de9c ZY |
2418 | |
2419 | IWL_DEBUG_RATE("enter\n"); | |
2420 | ||
2421 | priv->lq_mngr.lq_ready = 0; | |
b481de9c ZY |
2422 | |
2423 | IWL_DEBUG_RATE("leave\n"); | |
2424 | } | |
2425 | ||
bf403db8 | 2426 | static void rs_free_sta(void *priv_rate, void *priv_sta) |
b481de9c | 2427 | { |
c33104f0 | 2428 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
bf403db8 | 2429 | struct iwl_priv *priv; |
b481de9c | 2430 | |
bf403db8 | 2431 | priv = (struct iwl_priv *)priv_rate; |
b481de9c | 2432 | IWL_DEBUG_RATE("enter\n"); |
c33104f0 | 2433 | kfree(lq_sta); |
b481de9c ZY |
2434 | IWL_DEBUG_RATE("leave\n"); |
2435 | } | |
2436 | ||
2437 | ||
93dc646a | 2438 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2439 | static int open_file_generic(struct inode *inode, struct file *file) |
2440 | { | |
2441 | file->private_data = inode->i_private; | |
2442 | return 0; | |
2443 | } | |
c33104f0 | 2444 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 2445 | u32 *rate_n_flags, int index) |
98d7e09a | 2446 | { |
bf403db8 EK |
2447 | struct iwl_priv *priv; |
2448 | ||
2449 | priv = lq_sta->drv; | |
39e88504 GC |
2450 | if (lq_sta->dbg_fixed_rate) { |
2451 | if (index < 12) { | |
2452 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2453 | } else { | |
2454 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2455 | *rate_n_flags = 0x800D; | |
2456 | else | |
2457 | *rate_n_flags = 0x820A; | |
2458 | } | |
98d7e09a | 2459 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2460 | } else { |
2461 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2462 | } |
98d7e09a | 2463 | } |
5ae212c9 | 2464 | |
98d7e09a ZY |
2465 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2466 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2467 | { | |
c33104f0 | 2468 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2469 | struct iwl_priv *priv; |
98d7e09a ZY |
2470 | char buf[64]; |
2471 | int buf_size; | |
2472 | u32 parsed_rate; | |
2473 | ||
bf403db8 | 2474 | priv = lq_sta->drv; |
98d7e09a ZY |
2475 | memset(buf, 0, sizeof(buf)); |
2476 | buf_size = min(count, sizeof(buf) - 1); | |
2477 | if (copy_from_user(buf, user_buf, buf_size)) | |
2478 | return -EFAULT; | |
2479 | ||
2480 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2481 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2482 | else |
39e88504 | 2483 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2484 | |
39e88504 GC |
2485 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2486 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2487 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2488 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2489 | |
2490 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2491 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2492 | |
39e88504 | 2493 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2494 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2495 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2496 | } |
2497 | ||
2498 | return count; | |
2499 | } | |
0209dc11 | 2500 | |
5ae212c9 ZY |
2501 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2502 | char __user *user_buf, size_t count, loff_t *ppos) | |
2503 | { | |
2504 | char buff[1024]; | |
2505 | int desc = 0; | |
2506 | int i = 0; | |
2507 | ||
c33104f0 | 2508 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2509 | |
c33104f0 | 2510 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2511 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2512 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2513 | lq_sta->active_legacy_rate); |
98d7e09a | 2514 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2515 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2516 | desc += sprintf(buff+desc, "general:" |
2517 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2518 | lq_sta->lq.general_params.flags, |
2519 | lq_sta->lq.general_params.mimo_delimiter, | |
2520 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2521 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2522 | |
2523 | desc += sprintf(buff+desc, "agg:" | |
2524 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2525 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2526 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2527 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2528 | |
2529 | desc += sprintf(buff+desc, | |
2530 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2531 | lq_sta->lq.general_params.start_rate_index[0], |
2532 | lq_sta->lq.general_params.start_rate_index[1], | |
2533 | lq_sta->lq.general_params.start_rate_index[2], | |
2534 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2535 | |
2536 | ||
2537 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2538 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2539 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2540 | |
2541 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2542 | } | |
2543 | ||
2544 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2545 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2546 | .read = rs_sta_dbgfs_scale_table_read, |
2547 | .open = open_file_generic, | |
2548 | }; | |
0209dc11 ZY |
2549 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2550 | char __user *user_buf, size_t count, loff_t *ppos) | |
2551 | { | |
2552 | char buff[1024]; | |
2553 | int desc = 0; | |
2554 | int i, j; | |
2555 | ||
c33104f0 | 2556 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2557 | for (i = 0; i < LQ_SIZE; i++) { |
2558 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2559 | "rate=0x%X\n", | |
c33104f0 TW |
2560 | lq_sta->active_tbl == i?"*":"x", |
2561 | lq_sta->lq_info[i].lq_type, | |
2562 | lq_sta->lq_info[i].is_SGI, | |
2563 | lq_sta->lq_info[i].is_fat, | |
2564 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2565 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2566 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2567 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2568 | "counter=%d success=%d %%=%d\n", |
2569 | lq_sta->lq_info[i].win[j].counter, | |
2570 | lq_sta->lq_info[i].win[j].success_counter, | |
2571 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2572 | } |
2573 | } | |
2574 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2575 | } | |
2576 | ||
2577 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2578 | .read = rs_sta_dbgfs_stats_table_read, | |
2579 | .open = open_file_generic, | |
2580 | }; | |
5ae212c9 | 2581 | |
93dc646a ZY |
2582 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2583 | struct dentry *dir) | |
2584 | { | |
c33104f0 TW |
2585 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2586 | lq_sta->rs_sta_dbgfs_scale_table_file = | |
0209dc11 | 2587 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2588 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2589 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2590 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2591 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2592 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2593 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2594 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2595 | |
93dc646a ZY |
2596 | } |
2597 | ||
2598 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2599 | { | |
c33104f0 TW |
2600 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2601 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); | |
2602 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2603 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2604 | } |
2605 | #endif | |
2606 | ||
b481de9c ZY |
2607 | static struct rate_control_ops rs_ops = { |
2608 | .module = NULL, | |
2609 | .name = RS_NAME, | |
2610 | .tx_status = rs_tx_status, | |
2611 | .get_rate = rs_get_rate, | |
2612 | .rate_init = rs_rate_init, | |
2613 | .clear = rs_clear, | |
2614 | .alloc = rs_alloc, | |
2615 | .free = rs_free, | |
2616 | .alloc_sta = rs_alloc_sta, | |
2617 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2618 | #ifdef CONFIG_MAC80211_DEBUGFS |
2619 | .add_sta_debugfs = rs_add_debugfs, | |
2620 | .remove_sta_debugfs = rs_remove_debugfs, | |
2621 | #endif | |
b481de9c ZY |
2622 | }; |
2623 | ||
bb8c093b | 2624 | int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) |
b481de9c ZY |
2625 | { |
2626 | struct ieee80211_local *local = hw_to_local(hw); | |
c79dd5b5 | 2627 | struct iwl_priv *priv = hw->priv; |
c33104f0 | 2628 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2629 | struct sta_info *sta; |
c33104f0 | 2630 | int cnt = 0, i; |
b481de9c ZY |
2631 | u32 samples = 0, success = 0, good = 0; |
2632 | unsigned long now = jiffies; | |
2633 | u32 max_time = 0; | |
2634 | u8 lq_type, antenna; | |
2635 | ||
d0709a65 JB |
2636 | rcu_read_lock(); |
2637 | ||
b481de9c ZY |
2638 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); |
2639 | if (!sta || !sta->rate_ctrl_priv) { | |
d0709a65 | 2640 | if (sta) |
b481de9c | 2641 | IWL_DEBUG_RATE("leave - no private rate data!\n"); |
d0709a65 | 2642 | else |
b481de9c | 2643 | IWL_DEBUG_RATE("leave - no station!\n"); |
d0709a65 | 2644 | rcu_read_unlock(); |
b481de9c ZY |
2645 | return sprintf(buf, "station %d not found\n", sta_id); |
2646 | } | |
2647 | ||
c33104f0 | 2648 | lq_sta = (void *)sta->rate_ctrl_priv; |
b481de9c | 2649 | |
c33104f0 | 2650 | lq_type = lq_sta->lq_info[lq_sta->active_tbl].lq_type; |
fde0db31 | 2651 | antenna = lq_sta->lq_info[lq_sta->active_tbl].ant_type; |
b481de9c ZY |
2652 | |
2653 | if (is_legacy(lq_type)) | |
2654 | i = IWL_RATE_54M_INDEX; | |
2655 | else | |
2656 | i = IWL_RATE_60M_INDEX; | |
2657 | while (1) { | |
2658 | u64 mask; | |
2659 | int j; | |
c33104f0 | 2660 | int active = lq_sta->active_tbl; |
b481de9c | 2661 | |
c33104f0 | 2662 | cnt += |
1826dcc0 | 2663 | sprintf(&buf[cnt], " %2dMbs: ", iwl_rates[i].ieee / 2); |
b481de9c ZY |
2664 | |
2665 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2666 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
c33104f0 TW |
2667 | buf[cnt++] = |
2668 | (lq_sta->lq_info[active].win[i].data & mask) | |
b481de9c ZY |
2669 | ? '1' : '0'; |
2670 | ||
c33104f0 TW |
2671 | samples += lq_sta->lq_info[active].win[i].counter; |
2672 | good += lq_sta->lq_info[active].win[i].success_counter; | |
2673 | success += lq_sta->lq_info[active].win[i].success_counter * | |
1826dcc0 | 2674 | iwl_rates[i].ieee; |
b481de9c | 2675 | |
c33104f0 | 2676 | if (lq_sta->lq_info[active].win[i].stamp) { |
b481de9c ZY |
2677 | int delta = |
2678 | jiffies_to_msecs(now - | |
c33104f0 | 2679 | lq_sta->lq_info[active].win[i].stamp); |
b481de9c ZY |
2680 | |
2681 | if (delta > max_time) | |
2682 | max_time = delta; | |
2683 | ||
c33104f0 | 2684 | cnt += sprintf(&buf[cnt], "%5dms\n", delta); |
b481de9c | 2685 | } else |
c33104f0 | 2686 | buf[cnt++] = '\n'; |
b481de9c | 2687 | |
bb8c093b | 2688 | j = iwl4965_get_prev_ieee_rate(i); |
b481de9c ZY |
2689 | if (j == i) |
2690 | break; | |
2691 | i = j; | |
2692 | } | |
2693 | ||
1826dcc0 TW |
2694 | /* |
2695 | * Display the average rate of all samples taken. | |
2696 | * NOTE: We multiply # of samples by 2 since the IEEE measurement | |
2697 | * added from iwl_rates is actually 2X the rate. | |
2698 | */ | |
b481de9c | 2699 | if (samples) |
c33104f0 | 2700 | cnt += sprintf(&buf[cnt], |
b481de9c ZY |
2701 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" |
2702 | "%3d%% success (%d good packets over %d tries)\n", | |
2703 | success / (2 * samples), (success * 5 / samples) % 10, | |
2704 | max_time, good * 100 / samples, good, samples); | |
2705 | else | |
c33104f0 TW |
2706 | cnt += sprintf(&buf[cnt], "\nAverage rate: 0Mbs\n"); |
2707 | ||
2708 | cnt += sprintf(&buf[cnt], "\nrate scale type %d antenna %d " | |
b481de9c | 2709 | "active_search %d rate index %d\n", lq_type, antenna, |
8318d78a | 2710 | lq_sta->search_better_tbl, sta->last_txrate_idx); |
b481de9c | 2711 | |
d0709a65 | 2712 | rcu_read_unlock(); |
c33104f0 | 2713 | return cnt; |
b481de9c ZY |
2714 | } |
2715 | ||
bb8c093b | 2716 | void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) |
b481de9c | 2717 | { |
c79dd5b5 | 2718 | struct iwl_priv *priv = hw->priv; |
b481de9c ZY |
2719 | |
2720 | priv->lq_mngr.lq_ready = 1; | |
2721 | } | |
2722 | ||
897e1cf2 | 2723 | int iwl4965_rate_control_register(void) |
b481de9c | 2724 | { |
897e1cf2 | 2725 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2726 | } |
2727 | ||
897e1cf2 | 2728 | void iwl4965_rate_control_unregister(void) |
b481de9c ZY |
2729 | { |
2730 | ieee80211_rate_control_unregister(&rs_ops); | |
2731 | } | |
2732 |