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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 | */ | |
faa29718 RR |
276 | static u8 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 | |
faa29718 | 290 | return MAX_TID_COUNT; |
0c11b4de RR |
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; | |
faa29718 | 303 | return MAX_TID_COUNT; |
0c11b4de RR |
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; | |
faa29718 RR |
320 | |
321 | return tid; | |
0c11b4de RR |
322 | } |
323 | ||
324 | /* | |
325 | get the traffic load value for tid | |
326 | */ | |
327 | static u32 rs_tl_get_load(struct iwl4965_lq_sta *lq_data, u8 tid) | |
328 | { | |
329 | u32 curr_time = jiffies_to_msecs(jiffies); | |
330 | u32 time_diff; | |
331 | s32 index; | |
332 | struct iwl4965_traffic_load *tl = NULL; | |
333 | ||
334 | if (tid >= TID_MAX_LOAD_COUNT) | |
335 | return 0; | |
336 | ||
337 | tl = &(lq_data->load[tid]); | |
338 | ||
339 | curr_time -= curr_time % TID_ROUND_VALUE; | |
340 | ||
341 | if (!(tl->queue_count)) | |
342 | return 0; | |
343 | ||
344 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
345 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
346 | ||
347 | /* The history is too long: remove data that is older than */ | |
348 | /* TID_MAX_TIME_DIFF */ | |
349 | if (index >= TID_QUEUE_MAX_SIZE) | |
350 | rs_tl_rm_old_stats(tl, curr_time); | |
351 | ||
352 | return tl->total; | |
353 | } | |
354 | ||
c79dd5b5 | 355 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
0c11b4de RR |
356 | struct iwl4965_lq_sta *lq_data, u8 tid, |
357 | struct sta_info *sta) | |
358 | { | |
359 | unsigned long state; | |
360 | DECLARE_MAC_BUF(mac); | |
361 | ||
07346f81 | 362 | spin_lock_bh(&sta->lock); |
cee24a3e | 363 | state = sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 364 | spin_unlock_bh(&sta->lock); |
0c11b4de RR |
365 | |
366 | if (state == HT_AGG_STATE_IDLE && | |
367 | rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { | |
368 | IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n", | |
369 | print_mac(mac, sta->addr), tid); | |
370 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); | |
371 | } | |
372 | } | |
373 | ||
c79dd5b5 | 374 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
0c11b4de RR |
375 | struct iwl4965_lq_sta *lq_data, |
376 | struct sta_info *sta) | |
377 | { | |
378 | if ((tid < TID_MAX_LOAD_COUNT)) | |
379 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
380 | else if (tid == IWL_AGG_ALL_TID) | |
381 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
382 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
383 | } | |
384 | ||
39e88504 | 385 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 386 | { |
39e88504 GC |
387 | return (!!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
388 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
389 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK)); | |
fde0db31 GC |
390 | } |
391 | ||
77626355 BC |
392 | /** |
393 | * rs_collect_tx_data - Update the success/failure sliding window | |
394 | * | |
395 | * We keep a sliding window of the last 62 packets transmitted | |
396 | * at this rate. window->data contains the bitmask of successful | |
397 | * packets. | |
398 | */ | |
bb8c093b | 399 | static int rs_collect_tx_data(struct iwl4965_rate_scale_data *windows, |
99556438 RR |
400 | int scale_index, s32 tpt, int retries, |
401 | int successes) | |
b481de9c | 402 | { |
bb8c093b | 403 | struct iwl4965_rate_scale_data *window = NULL; |
39e88504 | 404 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
405 | s32 fail_count; |
406 | ||
dc2453ae TW |
407 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
408 | return -EINVAL; | |
b481de9c | 409 | |
77626355 | 410 | /* Select data for current tx bit rate */ |
b481de9c ZY |
411 | window = &(windows[scale_index]); |
412 | ||
77626355 BC |
413 | /* |
414 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
415 | * history window; anything older isn't really relevant any more. | |
416 | * If we have filled up the sliding window, drop the oldest attempt; | |
417 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
418 | * subtract "1" from the success counter (this is the main reason | |
419 | * we keep these bitmaps!). | |
420 | */ | |
99556438 | 421 | while (retries > 0) { |
39e88504 GC |
422 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
423 | ||
424 | /* remove earliest */ | |
425 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
426 | ||
99556438 RR |
427 | if (window->data & mask) { |
428 | window->data &= ~mask; | |
39e88504 | 429 | window->success_counter--; |
99556438 | 430 | } |
b481de9c | 431 | } |
b481de9c | 432 | |
99556438 RR |
433 | /* Increment frames-attempted counter */ |
434 | window->counter++; | |
435 | ||
436 | /* Shift bitmap by one frame (throw away oldest history), | |
437 | * OR in "1", and increment "success" if this | |
438 | * frame was successful. */ | |
39e88504 | 439 | window->data <<= 1;; |
99556438 | 440 | if (successes > 0) { |
39e88504 | 441 | window->success_counter++; |
99556438 RR |
442 | window->data |= 0x1; |
443 | successes--; | |
444 | } | |
77626355 | 445 | |
99556438 | 446 | retries--; |
b481de9c ZY |
447 | } |
448 | ||
77626355 | 449 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
450 | if (window->counter > 0) |
451 | window->success_ratio = 128 * (100 * window->success_counter) | |
452 | / window->counter; | |
453 | else | |
454 | window->success_ratio = IWL_INVALID_VALUE; | |
455 | ||
456 | fail_count = window->counter - window->success_counter; | |
457 | ||
77626355 | 458 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
459 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
460 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
461 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
462 | else | |
463 | window->average_tpt = IWL_INVALID_VALUE; | |
464 | ||
77626355 | 465 | /* Tag this window as having been updated */ |
b481de9c ZY |
466 | window->stamp = jiffies; |
467 | ||
dc2453ae | 468 | return 0; |
b481de9c ZY |
469 | } |
470 | ||
77626355 BC |
471 | /* |
472 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
473 | */ | |
39e88504 GC |
474 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
475 | static u32 rate_n_flags_from_tbl(struct iwl4965_scale_tbl_info *tbl, | |
476 | int index, u8 use_green) | |
b481de9c | 477 | { |
39e88504 GC |
478 | u32 rate_n_flags = 0; |
479 | ||
b481de9c | 480 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 481 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 482 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 483 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 484 | |
fde0db31 GC |
485 | } else if (is_Ht(tbl->lq_type)) { |
486 | if (index > IWL_LAST_OFDM_RATE) { | |
487 | IWL_ERROR("invalid HT rate index %d\n", index); | |
b481de9c | 488 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 489 | } |
39e88504 | 490 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
491 | |
492 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 493 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 494 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 495 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 496 | else |
1826dcc0 | 497 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 498 | } else { |
fde0db31 | 499 | IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
500 | } |
501 | ||
39e88504 | 502 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 503 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 504 | |
39e88504 GC |
505 | if (is_Ht(tbl->lq_type)) { |
506 | if (tbl->is_fat) { | |
507 | if (tbl->is_dup) | |
508 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
509 | else | |
510 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
511 | } | |
512 | if (tbl->is_SGI) | |
513 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
514 | ||
515 | if (use_green) { | |
516 | rate_n_flags |= RATE_MCS_GF_MSK; | |
517 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
518 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
519 | IWL_ERROR("GF was set with SGI:SISO\n"); | |
520 | } | |
521 | } | |
b481de9c | 522 | } |
39e88504 | 523 | return rate_n_flags; |
b481de9c ZY |
524 | } |
525 | ||
77626355 BC |
526 | /* |
527 | * Interpret uCode API's rate_n_flags format, | |
528 | * fill "search" or "active" tx mode table. | |
529 | */ | |
39e88504 | 530 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a JB |
531 | enum ieee80211_band band, |
532 | struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
533 | int *rate_idx) |
534 | { | |
39e88504 GC |
535 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
536 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
537 | u8 mcs; | |
b481de9c | 538 | |
39e88504 | 539 | *rate_idx = iwl4965_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 540 | |
fde0db31 | 541 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 542 | *rate_idx = -1; |
dc2453ae | 543 | return -EINVAL; |
b481de9c | 544 | } |
77626355 | 545 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
546 | tbl->is_fat = 0; |
547 | tbl->is_dup = 0; | |
fde0db31 GC |
548 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
549 | tbl->lq_type = LQ_NONE; | |
b481de9c | 550 | |
77626355 | 551 | /* legacy rate format */ |
39e88504 | 552 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 553 | if (num_of_ant == 1) { |
8318d78a | 554 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
555 | tbl->lq_type = LQ_A; |
556 | else | |
557 | tbl->lq_type = LQ_G; | |
b481de9c | 558 | } |
fde0db31 | 559 | /* HT rate format */ |
b481de9c | 560 | } else { |
39e88504 | 561 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
562 | tbl->is_SGI = 1; |
563 | ||
39e88504 GC |
564 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
565 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
566 | tbl->is_fat = 1; |
567 | ||
39e88504 | 568 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 569 | tbl->is_dup = 1; |
fde0db31 | 570 | |
39e88504 | 571 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 572 | |
39e88504 GC |
573 | /* SISO */ |
574 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
575 | if (num_of_ant == 1) |
576 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
577 | /* MIMO2 */ | |
39e88504 | 578 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
579 | if (num_of_ant == 2) |
580 | tbl->lq_type = LQ_MIMO2; | |
581 | /* MIMO3 */ | |
582 | } else { | |
583 | if (num_of_ant == 3) | |
584 | tbl->lq_type = LQ_MIMO3; | |
585 | } | |
b481de9c ZY |
586 | } |
587 | return 0; | |
588 | } | |
aade00ce GC |
589 | |
590 | /* switch to another antenna/antennas and return 1 */ | |
591 | /* if no other valid antenna found, return 0 */ | |
592 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
593 | struct iwl4965_scale_tbl_info *tbl) | |
b481de9c | 594 | { |
aade00ce GC |
595 | u8 new_ant_type; |
596 | ||
597 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
598 | return 0; | |
599 | ||
600 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
601 | return 0; | |
602 | ||
603 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
604 | ||
605 | while ((new_ant_type != tbl->ant_type) && | |
606 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
607 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
608 | ||
609 | if (new_ant_type == tbl->ant_type) | |
610 | return 0; | |
611 | ||
612 | tbl->ant_type = new_ant_type; | |
613 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
614 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
615 | return 1; | |
b481de9c ZY |
616 | } |
617 | ||
39e88504 | 618 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 619 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
620 | #if 0 |
621 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 622 | { |
270243a5 RR |
623 | return ((conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
624 | priv->current_ht_config.is_green_field && | |
625 | !priv->current_ht_config.non_GF_STA_present); | |
f935a6da | 626 | } |
4f85f5b3 | 627 | #endif |
f935a6da GC |
628 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
629 | { | |
dc2453ae | 630 | return 0; |
b481de9c ZY |
631 | } |
632 | ||
633 | /** | |
634 | * rs_get_supported_rates - get the available rates | |
635 | * | |
636 | * if management frame or broadcast frame only return | |
637 | * basic available rates. | |
638 | * | |
639 | */ | |
eecd6e57 | 640 | static u16 rs_get_supported_rates(struct iwl4965_lq_sta *lq_sta, |
b481de9c | 641 | struct ieee80211_hdr *hdr, |
eecd6e57 | 642 | enum iwl_table_type rate_type) |
b481de9c | 643 | { |
eecd6e57 GC |
644 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
645 | lq_sta->active_rate_basic) | |
646 | return lq_sta->active_rate_basic; | |
647 | ||
648 | if (is_legacy(rate_type)) { | |
649 | return lq_sta->active_legacy_rate; | |
650 | } else { | |
b481de9c | 651 | if (is_siso(rate_type)) |
eecd6e57 | 652 | return lq_sta->active_siso_rate; |
fde0db31 | 653 | else if (is_mimo2(rate_type)) |
eecd6e57 | 654 | return lq_sta->active_mimo2_rate; |
b481de9c | 655 | else |
eecd6e57 | 656 | return lq_sta->active_mimo3_rate; |
c33104f0 | 657 | } |
b481de9c ZY |
658 | } |
659 | ||
bf403db8 EK |
660 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
661 | int rate_type) | |
b481de9c ZY |
662 | { |
663 | u8 high = IWL_RATE_INVALID; | |
664 | u8 low = IWL_RATE_INVALID; | |
665 | ||
01ebd063 | 666 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
667 | * the rate table */ |
668 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
669 | int i; | |
670 | u32 mask; | |
671 | ||
672 | /* Find the previous rate that is in the rate mask */ | |
673 | i = index - 1; | |
674 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
675 | if (rate_mask & mask) { | |
676 | low = i; | |
677 | break; | |
678 | } | |
679 | } | |
680 | ||
681 | /* Find the next rate that is in the rate mask */ | |
682 | i = index + 1; | |
683 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
684 | if (rate_mask & mask) { | |
685 | high = i; | |
686 | break; | |
687 | } | |
688 | } | |
689 | ||
690 | return (high << 8) | low; | |
691 | } | |
692 | ||
693 | low = index; | |
694 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 695 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
696 | if (low == IWL_RATE_INVALID) |
697 | break; | |
698 | if (rate_mask & (1 << low)) | |
699 | break; | |
700 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
701 | } | |
702 | ||
703 | high = index; | |
704 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 705 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
706 | if (high == IWL_RATE_INVALID) |
707 | break; | |
708 | if (rate_mask & (1 << high)) | |
709 | break; | |
710 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
711 | } | |
712 | ||
713 | return (high << 8) | low; | |
714 | } | |
715 | ||
39e88504 | 716 | static u32 rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 717 | struct iwl4965_scale_tbl_info *tbl, u8 scale_index, |
39e88504 | 718 | u8 ht_possible) |
b481de9c | 719 | { |
b481de9c ZY |
720 | s32 low; |
721 | u16 rate_mask; | |
722 | u16 high_low; | |
723 | u8 switch_to_legacy = 0; | |
c33104f0 | 724 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
725 | |
726 | /* check if we need to switch from HT to legacy rates. | |
727 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
728 | * are always supported (spec demand) */ | |
729 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
730 | switch_to_legacy = 1; | |
731 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 732 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
733 | tbl->lq_type = LQ_A; |
734 | else | |
735 | tbl->lq_type = LQ_G; | |
736 | ||
69fdb309 | 737 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 738 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
739 | |
740 | tbl->is_fat = 0; | |
741 | tbl->is_SGI = 0; | |
742 | } | |
743 | ||
eecd6e57 | 744 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 745 | |
77626355 | 746 | /* Mask with station rate restriction */ |
b481de9c | 747 | if (is_legacy(tbl->lq_type)) { |
77626355 | 748 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 749 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 750 | rate_mask = (u16)(rate_mask & |
c33104f0 | 751 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 752 | else |
c33104f0 | 753 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
754 | } |
755 | ||
77626355 | 756 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 757 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
758 | low = scale_index; |
759 | goto out; | |
b481de9c ZY |
760 | } |
761 | ||
bf403db8 EK |
762 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
763 | tbl->lq_type); | |
b481de9c ZY |
764 | low = high_low & 0xff; |
765 | ||
39e88504 GC |
766 | if (low == IWL_RATE_INVALID) |
767 | low = scale_index; | |
768 | ||
769 | out: | |
770 | return rate_n_flags_from_tbl(tbl, low, is_green); | |
b481de9c ZY |
771 | } |
772 | ||
77626355 BC |
773 | /* |
774 | * mac80211 sends us Tx status | |
775 | */ | |
c33104f0 | 776 | static void rs_tx_status(void *priv_rate, struct net_device *dev, |
e039fa4a | 777 | struct sk_buff *skb) |
b481de9c ZY |
778 | { |
779 | int status; | |
780 | u8 retries; | |
781 | int rs_index, index = 0; | |
c33104f0 | 782 | struct iwl4965_lq_sta *lq_sta; |
66c73db7 | 783 | struct iwl_link_quality_cmd *table; |
b481de9c ZY |
784 | struct sta_info *sta; |
785 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
c79dd5b5 | 786 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
b481de9c | 787 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
4c424e4c | 788 | struct ieee80211_hw *hw = local_to_hw(local); |
e039fa4a | 789 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
bb8c093b CH |
790 | struct iwl4965_rate_scale_data *window = NULL; |
791 | struct iwl4965_rate_scale_data *search_win = NULL; | |
39e88504 | 792 | u32 tx_rate; |
bb8c093b CH |
793 | struct iwl4965_scale_tbl_info tbl_type; |
794 | struct iwl4965_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c ZY |
795 | u8 active_index = 0; |
796 | u16 fc = le16_to_cpu(hdr->frame_control); | |
797 | s32 tpt = 0; | |
798 | ||
58826351 | 799 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
800 | |
801 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
802 | return; | |
803 | ||
99556438 | 804 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
805 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
806 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
807 | return; |
808 | ||
e039fa4a | 809 | retries = info->status.retry_count; |
b481de9c ZY |
810 | |
811 | if (retries > 15) | |
812 | retries = 15; | |
813 | ||
d0709a65 | 814 | rcu_read_lock(); |
b481de9c ZY |
815 | |
816 | sta = sta_info_get(local, hdr->addr1); | |
817 | ||
f4d6082d TW |
818 | if (!sta || !sta->rate_ctrl_priv) |
819 | goto out; | |
820 | ||
b481de9c | 821 | |
c33104f0 | 822 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c ZY |
823 | |
824 | if (!priv->lq_mngr.lq_ready) | |
f4d6082d | 825 | goto out; |
b481de9c | 826 | |
c33104f0 TW |
827 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
828 | !lq_sta->ibss_sta_added) | |
f4d6082d | 829 | goto out; |
b481de9c | 830 | |
c33104f0 TW |
831 | table = &lq_sta->lq; |
832 | active_index = lq_sta->active_tbl; | |
b481de9c | 833 | |
c33104f0 TW |
834 | curr_tbl = &(lq_sta->lq_info[active_index]); |
835 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
bb8c093b | 836 | window = (struct iwl4965_rate_scale_data *) |
b481de9c | 837 | &(curr_tbl->win[0]); |
bb8c093b | 838 | search_win = (struct iwl4965_rate_scale_data *) |
b481de9c ZY |
839 | &(search_tbl->win[0]); |
840 | ||
77626355 BC |
841 | /* |
842 | * Ignore this Tx frame response if its initial rate doesn't match | |
843 | * that of latest Link Quality command. There may be stragglers | |
844 | * from a previous Link Quality command, but we're no longer interested | |
845 | * in those; they're either from the "active" mode while we're trying | |
846 | * to check "search" mode, or a prior "search" mode after we've moved | |
847 | * to a new "search" mode (which might become the new "active" mode). | |
848 | */ | |
39e88504 GC |
849 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
850 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
851 | if (priv->band == IEEE80211_BAND_5GHZ) |
852 | rs_index -= IWL_FIRST_OFDM_RATE; | |
853 | ||
e039fa4a | 854 | if ((info->tx_rate_idx < 0) || |
4c424e4c | 855 | (tbl_type.is_SGI ^ |
e039fa4a | 856 | !!(info->flags & IEEE80211_TX_CTL_SHORT_GI)) || |
4c424e4c | 857 | (tbl_type.is_fat ^ |
e039fa4a | 858 | !!(info->flags & IEEE80211_TX_CTL_40_MHZ_WIDTH)) || |
4c424e4c | 859 | (tbl_type.is_dup ^ |
e039fa4a JB |
860 | !!(info->flags & IEEE80211_TX_CTL_DUP_DATA)) || |
861 | (tbl_type.ant_type ^ info->antenna_sel_tx) || | |
39e88504 | 862 | (!!(tx_rate & RATE_MCS_HT_MSK) ^ |
e039fa4a | 863 | !!(info->flags & IEEE80211_TX_CTL_OFDM_HT)) || |
39e88504 | 864 | (!!(tx_rate & RATE_MCS_GF_MSK) ^ |
e039fa4a | 865 | !!(info->flags & IEEE80211_TX_CTL_GREEN_FIELD)) || |
4c424e4c | 866 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e039fa4a | 867 | hw->wiphy->bands[info->band]->bitrates[info->tx_rate_idx].bitrate)) { |
39e88504 | 868 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
f4d6082d | 869 | goto out; |
b481de9c ZY |
870 | } |
871 | ||
77626355 | 872 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 873 | while (retries) { |
77626355 BC |
874 | /* Look up the rate and other info used for each tx attempt. |
875 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
876 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
877 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
878 | &tbl_type, &rs_index); |
879 | ||
77626355 BC |
880 | /* If type matches "search" table, |
881 | * add failure to "search" history */ | |
b481de9c | 882 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 883 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
884 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
885 | if (search_tbl->expected_tpt) | |
886 | tpt = search_tbl->expected_tpt[rs_index]; | |
887 | else | |
888 | tpt = 0; | |
99556438 | 889 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
890 | |
891 | /* Else if type matches "current/active" table, | |
892 | * add failure to "current/active" history */ | |
b481de9c | 893 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 894 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
895 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
896 | if (curr_tbl->expected_tpt) | |
897 | tpt = curr_tbl->expected_tpt[rs_index]; | |
898 | else | |
899 | tpt = 0; | |
99556438 | 900 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 901 | } |
77626355 BC |
902 | |
903 | /* If not searching for a new mode, increment failed counter | |
904 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
905 | if (lq_sta->stay_in_tbl) |
906 | lq_sta->total_failed++; | |
b481de9c ZY |
907 | --retries; |
908 | index++; | |
909 | ||
910 | } | |
911 | ||
77626355 BC |
912 | /* |
913 | * Find (by rate) the history window to update with final Tx attempt; | |
914 | * if Tx was successful first try, use original rate, | |
915 | * else look up the rate that was, finally, successful. | |
916 | */ | |
39e88504 GC |
917 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
918 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 919 | |
77626355 | 920 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 921 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 922 | |
77626355 BC |
923 | /* If type matches "search" table, |
924 | * add final tx status to "search" history */ | |
b481de9c | 925 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 926 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
927 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
928 | if (search_tbl->expected_tpt) | |
929 | tpt = search_tbl->expected_tpt[rs_index]; | |
930 | else | |
931 | tpt = 0; | |
e039fa4a | 932 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 933 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
934 | info->status.ampdu_ack_len, |
935 | info->status.ampdu_ack_map); | |
99556438 RR |
936 | else |
937 | rs_collect_tx_data(search_win, rs_index, tpt, | |
938 | 1, status); | |
77626355 BC |
939 | /* Else if type matches "current/active" table, |
940 | * add final tx status to "current/active" history */ | |
b481de9c | 941 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 942 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
943 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
944 | if (curr_tbl->expected_tpt) | |
945 | tpt = curr_tbl->expected_tpt[rs_index]; | |
946 | else | |
947 | tpt = 0; | |
e039fa4a | 948 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 949 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
950 | info->status.ampdu_ack_len, |
951 | info->status.ampdu_ack_map); | |
99556438 RR |
952 | else |
953 | rs_collect_tx_data(window, rs_index, tpt, | |
954 | 1, status); | |
b481de9c ZY |
955 | } |
956 | ||
77626355 BC |
957 | /* If not searching for new mode, increment success/failed counter |
958 | * ... these help determine when to start searching again */ | |
c33104f0 | 959 | if (lq_sta->stay_in_tbl) { |
e039fa4a JB |
960 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
961 | lq_sta->total_success += info->status.ampdu_ack_map; | |
99556438 | 962 | lq_sta->total_failed += |
e039fa4a | 963 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
964 | } else { |
965 | if (status) | |
966 | lq_sta->total_success++; | |
967 | else | |
968 | lq_sta->total_failed++; | |
969 | } | |
b481de9c ZY |
970 | } |
971 | ||
77626355 | 972 | /* See if there's a better rate or modulation mode to try. */ |
b481de9c | 973 | rs_rate_scale_perform(priv, dev, hdr, sta); |
f4d6082d | 974 | out: |
d0709a65 | 975 | rcu_read_unlock(); |
b481de9c ZY |
976 | return; |
977 | } | |
978 | ||
77626355 BC |
979 | /* |
980 | * Begin a period of staying with a selected modulation mode. | |
981 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
982 | * Set frame tx success limits according to legacy vs. high-throughput, | |
983 | * and reset overall (spanning all rates) tx success history statistics. | |
984 | * These control how long we stay using same modulation mode before | |
985 | * searching for a new mode. | |
986 | */ | |
bf403db8 | 987 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
c33104f0 | 988 | struct iwl4965_lq_sta *lq_sta) |
b481de9c | 989 | { |
eecd6e57 | 990 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 991 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 992 | if (is_legacy) { |
c33104f0 TW |
993 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
994 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
995 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 996 | } else { |
c33104f0 TW |
997 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
998 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
999 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1000 | } |
c33104f0 TW |
1001 | lq_sta->table_count = 0; |
1002 | lq_sta->total_failed = 0; | |
1003 | lq_sta->total_success = 0; | |
b481de9c ZY |
1004 | } |
1005 | ||
77626355 BC |
1006 | /* |
1007 | * Find correct throughput table for given mode of modulation | |
1008 | */ | |
eecd6e57 | 1009 | static void rs_set_expected_tpt_table(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 1010 | struct iwl4965_scale_tbl_info *tbl) |
b481de9c ZY |
1011 | { |
1012 | if (is_legacy(tbl->lq_type)) { | |
1013 | if (!is_a_band(tbl->lq_type)) | |
1014 | tbl->expected_tpt = expected_tpt_G; | |
1015 | else | |
1016 | tbl->expected_tpt = expected_tpt_A; | |
1017 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1018 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1019 | if (tbl->is_SGI) |
1020 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1021 | else | |
1022 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1023 | else if (tbl->is_SGI) | |
1024 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1025 | else | |
1026 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1027 | ||
fde0db31 | 1028 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1029 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1030 | if (tbl->is_SGI) |
1031 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1032 | else | |
1033 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1034 | else if (tbl->is_SGI) | |
1035 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1036 | else | |
1037 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1038 | } else | |
1039 | tbl->expected_tpt = expected_tpt_G; | |
1040 | } | |
1041 | ||
77626355 BC |
1042 | /* |
1043 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1044 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1045 | * above the current measured throughput of "active" mode, to give new mode | |
1046 | * a fair chance to prove itself without too many challenges. | |
1047 | * | |
1048 | * This gets called when transitioning to more aggressive modulation | |
1049 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1050 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1051 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1052 | * bit rate will typically need to increase, but not if performance was bad. | |
1053 | */ | |
c79dd5b5 | 1054 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
c33104f0 | 1055 | struct iwl4965_lq_sta *lq_sta, |
77626355 | 1056 | struct iwl4965_scale_tbl_info *tbl, /* "search" */ |
f935a6da | 1057 | u16 rate_mask, s8 index) |
b481de9c | 1058 | { |
77626355 | 1059 | /* "active" values */ |
bb8c093b | 1060 | struct iwl4965_scale_tbl_info *active_tbl = |
c33104f0 | 1061 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1062 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1063 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1064 | |
1065 | /* expected "search" throughput */ | |
1066 | s32 *tpt_tbl = tbl->expected_tpt; | |
1067 | ||
1068 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1069 | u16 high_low; |
f935a6da | 1070 | s8 rate = index; |
b481de9c ZY |
1071 | |
1072 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1073 | ||
1074 | for (; ;) { | |
bf403db8 EK |
1075 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1076 | tbl->lq_type); | |
b481de9c ZY |
1077 | |
1078 | low = high_low & 0xff; | |
1079 | high = (high_low >> 8) & 0xff; | |
1080 | ||
77626355 BC |
1081 | /* |
1082 | * Lower the "search" bit rate, to give new "search" mode | |
1083 | * approximately the same throughput as "active" if: | |
1084 | * | |
1085 | * 1) "Active" mode has been working modestly well (but not | |
1086 | * great), and expected "search" throughput (under perfect | |
1087 | * conditions) at candidate rate is above the actual | |
1088 | * measured "active" throughput (but less than expected | |
1089 | * "active" throughput under perfect conditions). | |
1090 | * OR | |
1091 | * 2) "Active" mode has been working perfectly or very well | |
1092 | * and expected "search" throughput (under perfect | |
1093 | * conditions) at candidate rate is above expected | |
1094 | * "active" throughput (under perfect conditions). | |
1095 | */ | |
c33104f0 | 1096 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1097 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1098 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1099 | (tpt_tbl[rate] <= active_tpt))) || | |
1100 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1101 | (tpt_tbl[rate] > active_tpt))) { | |
1102 | ||
77626355 BC |
1103 | /* (2nd or later pass) |
1104 | * If we've already tried to raise the rate, and are | |
1105 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1106 | if (start_hi != IWL_RATE_INVALID) { |
1107 | new_rate = start_hi; | |
1108 | break; | |
1109 | } | |
77626355 | 1110 | |
b481de9c | 1111 | new_rate = rate; |
77626355 BC |
1112 | |
1113 | /* Loop again with lower rate */ | |
b481de9c ZY |
1114 | if (low != IWL_RATE_INVALID) |
1115 | rate = low; | |
77626355 BC |
1116 | |
1117 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1118 | else |
1119 | break; | |
77626355 BC |
1120 | |
1121 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1122 | } else { |
77626355 BC |
1123 | /* (2nd or later pass) |
1124 | * If we've already tried to lower the rate, and are | |
1125 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1126 | if (new_rate != IWL_RATE_INVALID) |
1127 | break; | |
77626355 BC |
1128 | |
1129 | /* Loop again with higher rate */ | |
b481de9c ZY |
1130 | else if (high != IWL_RATE_INVALID) { |
1131 | start_hi = high; | |
1132 | rate = high; | |
77626355 BC |
1133 | |
1134 | /* Higher rate not available, use the original */ | |
b481de9c | 1135 | } else { |
b481de9c ZY |
1136 | break; |
1137 | } | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | return new_rate; | |
1142 | } | |
b481de9c | 1143 | |
77626355 BC |
1144 | /* |
1145 | * Set up search table for MIMO | |
1146 | */ | |
fde0db31 | 1147 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
c33104f0 | 1148 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1149 | struct ieee80211_conf *conf, |
1150 | struct sta_info *sta, | |
bb8c093b | 1151 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1152 | { |
b481de9c ZY |
1153 | u16 rate_mask; |
1154 | s32 rate; | |
c33104f0 | 1155 | s8 is_green = lq_sta->is_green; |
b481de9c | 1156 | |
270243a5 RR |
1157 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1158 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1159 | return -1; |
1160 | ||
270243a5 | 1161 | if (priv->current_ht_config.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) |
b481de9c ZY |
1162 | return -1; |
1163 | ||
77626355 | 1164 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1165 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1166 | return -1; |
1167 | ||
eecd6e57 | 1168 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1169 | |
1170 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1171 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1172 | tbl->action = 0; |
39e88504 GC |
1173 | rate_mask = lq_sta->active_mimo2_rate; |
1174 | ||
270243a5 | 1175 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1176 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1177 | tbl->is_fat = 1; |
1178 | else | |
1179 | tbl->is_fat = 0; | |
1180 | ||
39e88504 | 1181 | /* FIXME: - don't toggle SGI here |
b481de9c | 1182 | if (tbl->is_fat) { |
270243a5 | 1183 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1184 | tbl->is_SGI = 1; |
1185 | else | |
1186 | tbl->is_SGI = 0; | |
270243a5 | 1187 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1188 | tbl->is_SGI = 1; |
1189 | else | |
1190 | tbl->is_SGI = 0; | |
39e88504 | 1191 | */ |
b481de9c | 1192 | |
eecd6e57 | 1193 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1194 | |
f935a6da | 1195 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1196 | |
eecd6e57 | 1197 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1198 | |
1199 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1200 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1201 | rate, rate_mask); |
b481de9c | 1202 | return -1; |
39e88504 GC |
1203 | } |
1204 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); | |
b481de9c | 1205 | |
eecd6e57 | 1206 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1207 | tbl->current_rate, is_green); |
dc2453ae | 1208 | return 0; |
fde0db31 | 1209 | } |
b481de9c | 1210 | |
77626355 BC |
1211 | /* |
1212 | * Set up search table for SISO | |
1213 | */ | |
c79dd5b5 | 1214 | static int rs_switch_to_siso(struct iwl_priv *priv, |
c33104f0 | 1215 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1216 | struct ieee80211_conf *conf, |
1217 | struct sta_info *sta, | |
bb8c093b | 1218 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1219 | { |
b481de9c | 1220 | u16 rate_mask; |
c33104f0 | 1221 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1222 | s32 rate; |
1223 | ||
270243a5 RR |
1224 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1225 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1226 | return -1; |
1227 | ||
eecd6e57 | 1228 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1229 | |
c33104f0 | 1230 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1231 | tbl->lq_type = LQ_SISO; |
1232 | tbl->action = 0; | |
39e88504 | 1233 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1234 | |
270243a5 RR |
1235 | if (priv->current_ht_config.supported_chan_width |
1236 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1237 | tbl->is_fat = 1; |
1238 | else | |
1239 | tbl->is_fat = 0; | |
1240 | ||
39e88504 | 1241 | /* FIXME: - don't toggle SGI here |
b481de9c | 1242 | if (tbl->is_fat) { |
270243a5 | 1243 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1244 | tbl->is_SGI = 1; |
1245 | else | |
1246 | tbl->is_SGI = 0; | |
270243a5 | 1247 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1248 | tbl->is_SGI = 1; |
1249 | else | |
1250 | tbl->is_SGI = 0; | |
39e88504 | 1251 | */ |
b481de9c ZY |
1252 | |
1253 | if (is_green) | |
39e88504 | 1254 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1255 | |
eecd6e57 | 1256 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1257 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1258 | |
eecd6e57 | 1259 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1260 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1261 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1262 | rate, rate_mask); |
1263 | return -1; | |
1264 | } | |
39e88504 | 1265 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); |
eecd6e57 | 1266 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1267 | tbl->current_rate, is_green); |
403ab56b | 1268 | return 0; |
b481de9c ZY |
1269 | } |
1270 | ||
77626355 BC |
1271 | /* |
1272 | * Try to switch to new modulation mode from legacy | |
1273 | */ | |
c79dd5b5 | 1274 | static int rs_move_legacy_other(struct iwl_priv *priv, |
c33104f0 | 1275 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1276 | struct ieee80211_conf *conf, |
1277 | struct sta_info *sta, | |
b481de9c ZY |
1278 | int index) |
1279 | { | |
bb8c093b | 1280 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1281 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1282 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1283 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1284 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1285 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1286 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1287 | u8 start_action = tbl->action; |
fde0db31 GC |
1288 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1289 | int ret = 0; | |
b481de9c ZY |
1290 | |
1291 | for (; ;) { | |
1292 | switch (tbl->action) { | |
1293 | case IWL_LEGACY_SWITCH_ANTENNA: | |
f935a6da | 1294 | IWL_DEBUG_RATE("LQ: Legacy toggle Antenna\n"); |
b481de9c | 1295 | |
c33104f0 | 1296 | lq_sta->action_counter++; |
77626355 BC |
1297 | |
1298 | /* Don't change antenna if success has been great */ | |
b481de9c ZY |
1299 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1300 | break; | |
77626355 | 1301 | |
77626355 | 1302 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1303 | memcpy(search_tbl, tbl, sz); |
1304 | ||
aade00ce GC |
1305 | if (rs_toggle_antenna(valid_tx_ant, |
1306 | &search_tbl->current_rate, search_tbl)) { | |
aade00ce GC |
1307 | lq_sta->search_better_tbl = 1; |
1308 | goto out; | |
1309 | } | |
a5e8b505 | 1310 | break; |
b481de9c | 1311 | case IWL_LEGACY_SWITCH_SISO: |
eecd6e57 | 1312 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1313 | |
1314 | /* Set up search table to try SISO */ | |
b481de9c | 1315 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1316 | search_tbl->is_SGI = 0; |
c33104f0 | 1317 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1318 | search_tbl, index); |
dc2453ae | 1319 | if (!ret) { |
c33104f0 TW |
1320 | lq_sta->search_better_tbl = 1; |
1321 | lq_sta->action_counter = 0; | |
b481de9c | 1322 | goto out; |
dc2453ae | 1323 | } |
b481de9c ZY |
1324 | |
1325 | break; | |
fde0db31 | 1326 | case IWL_LEGACY_SWITCH_MIMO2: |
eecd6e57 | 1327 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1328 | |
1329 | /* Set up search table to try MIMO */ | |
b481de9c | 1330 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1331 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1332 | search_tbl->ant_type = ANT_AB;/*FIXME:RS*/ |
1333 | /*FIXME:RS:need to check ant validity*/ | |
1334 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1335 | search_tbl, index); |
dc2453ae | 1336 | if (!ret) { |
c33104f0 TW |
1337 | lq_sta->search_better_tbl = 1; |
1338 | lq_sta->action_counter = 0; | |
b481de9c | 1339 | goto out; |
dc2453ae | 1340 | } |
b481de9c ZY |
1341 | break; |
1342 | } | |
1343 | tbl->action++; | |
fde0db31 | 1344 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1345 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1346 | ||
1347 | if (tbl->action == start_action) | |
1348 | break; | |
1349 | ||
1350 | } | |
1351 | return 0; | |
1352 | ||
1353 | out: | |
1354 | tbl->action++; | |
fde0db31 | 1355 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1356 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1357 | return 0; | |
1358 | ||
1359 | } | |
1360 | ||
77626355 BC |
1361 | /* |
1362 | * Try to switch to new modulation mode from SISO | |
1363 | */ | |
c79dd5b5 | 1364 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
c33104f0 | 1365 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1366 | struct ieee80211_conf *conf, |
1367 | struct sta_info *sta, | |
b481de9c ZY |
1368 | int index) |
1369 | { | |
c33104f0 | 1370 | u8 is_green = lq_sta->is_green; |
bb8c093b | 1371 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1372 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1373 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1374 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1375 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1376 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1377 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1378 | u8 start_action = tbl->action; |
fde0db31 GC |
1379 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1380 | int ret; | |
b481de9c ZY |
1381 | |
1382 | for (;;) { | |
c33104f0 | 1383 | lq_sta->action_counter++; |
b481de9c ZY |
1384 | switch (tbl->action) { |
1385 | case IWL_SISO_SWITCH_ANTENNA: | |
eecd6e57 | 1386 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
b481de9c ZY |
1387 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1388 | break; | |
b481de9c ZY |
1389 | |
1390 | memcpy(search_tbl, tbl, sz); | |
aade00ce GC |
1391 | if (rs_toggle_antenna(valid_tx_ant, |
1392 | &search_tbl->current_rate, search_tbl)) { | |
1393 | lq_sta->search_better_tbl = 1; | |
1394 | goto out; | |
1395 | } | |
a5e8b505 | 1396 | break; |
fde0db31 | 1397 | case IWL_SISO_SWITCH_MIMO2: |
a5e8b505 | 1398 | IWL_DEBUG_RATE("LQ: SISO switch to MIMO2\n"); |
b481de9c | 1399 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1400 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1401 | search_tbl->ant_type = ANT_AB; /*FIXME:RS*/ |
1402 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1403 | search_tbl, index); |
dc2453ae | 1404 | if (!ret) { |
c33104f0 | 1405 | lq_sta->search_better_tbl = 1; |
b481de9c | 1406 | goto out; |
dc2453ae | 1407 | } |
b481de9c ZY |
1408 | break; |
1409 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1410 | if (!tbl->is_fat && |
1411 | !(priv->current_ht_config.sgf & | |
1412 | HT_SHORT_GI_20MHZ)) | |
1413 | break; | |
1414 | if (tbl->is_fat && | |
1415 | !(priv->current_ht_config.sgf & | |
1416 | HT_SHORT_GI_40MHZ)) | |
1417 | break; | |
1418 | ||
eecd6e57 | 1419 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1420 | |
b481de9c | 1421 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1422 | if (is_green) { |
1423 | if (!tbl->is_SGI) | |
1424 | break; | |
1425 | else | |
1426 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1427 | } |
39e88504 | 1428 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1429 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1430 | if (tbl->is_SGI) { |
1431 | s32 tpt = lq_sta->last_tpt / 100; | |
1432 | if (tpt >= search_tbl->expected_tpt[index]) | |
1433 | break; | |
1434 | } | |
1435 | search_tbl->current_rate = rate_n_flags_from_tbl( | |
1436 | search_tbl, index, is_green); | |
1437 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1438 | goto out; |
1439 | } | |
1440 | tbl->action++; | |
1441 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1442 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1443 | ||
1444 | if (tbl->action == start_action) | |
1445 | break; | |
1446 | } | |
1447 | return 0; | |
1448 | ||
1449 | out: | |
1450 | tbl->action++; | |
1451 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1452 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1453 | return 0; | |
1454 | } | |
1455 | ||
77626355 BC |
1456 | /* |
1457 | * Try to switch to new modulation mode from MIMO | |
1458 | */ | |
c79dd5b5 | 1459 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
c33104f0 | 1460 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1461 | struct ieee80211_conf *conf, |
1462 | struct sta_info *sta, | |
b481de9c ZY |
1463 | int index) |
1464 | { | |
c33104f0 | 1465 | s8 is_green = lq_sta->is_green; |
bb8c093b | 1466 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1467 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1468 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1469 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1470 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - |
1471 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1472 | u8 start_action = tbl->action; |
aade00ce GC |
1473 | /*u8 valid_tx_ant = priv->hw_params.valid_tx_ant;*/ |
1474 | int ret; | |
b481de9c ZY |
1475 | |
1476 | for (;;) { | |
c33104f0 | 1477 | lq_sta->action_counter++; |
b481de9c ZY |
1478 | switch (tbl->action) { |
1479 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1480 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
eecd6e57 | 1481 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1482 | |
77626355 | 1483 | /* Set up new search table for SISO */ |
b481de9c | 1484 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1485 | |
1486 | /*FIXME:RS:need to check ant validity + C*/ | |
b481de9c | 1487 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) |
fde0db31 | 1488 | search_tbl->ant_type = ANT_A; |
b481de9c | 1489 | else |
fde0db31 | 1490 | search_tbl->ant_type = ANT_B; |
b481de9c | 1491 | |
c33104f0 | 1492 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1493 | search_tbl, index); |
dc2453ae | 1494 | if (!ret) { |
c33104f0 | 1495 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1496 | goto out; |
1497 | } | |
1498 | break; | |
1499 | ||
1500 | case IWL_MIMO_SWITCH_GI: | |
a9841013 EG |
1501 | if (!tbl->is_fat && |
1502 | !(priv->current_ht_config.sgf & | |
1503 | HT_SHORT_GI_20MHZ)) | |
1504 | break; | |
1505 | if (tbl->is_fat && | |
1506 | !(priv->current_ht_config.sgf & | |
1507 | HT_SHORT_GI_40MHZ)) | |
1508 | break; | |
1509 | ||
eecd6e57 | 1510 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1511 | |
1512 | /* Set up new search table for MIMO */ | |
b481de9c | 1513 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1514 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1515 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1516 | /* |
1517 | * If active table already uses the fastest possible | |
1518 | * modulation (dual stream with short guard interval), | |
1519 | * and it's working well, there's no need to look | |
1520 | * for a better type of modulation! | |
1521 | */ | |
39e88504 | 1522 | if (tbl->is_SGI) { |
c33104f0 | 1523 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1524 | if (tpt >= search_tbl->expected_tpt[index]) |
1525 | break; | |
b481de9c | 1526 | } |
39e88504 GC |
1527 | search_tbl->current_rate = rate_n_flags_from_tbl( |
1528 | search_tbl, index, is_green); | |
1529 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1530 | goto out; |
1531 | ||
1532 | } | |
1533 | tbl->action++; | |
1534 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1535 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1536 | ||
1537 | if (tbl->action == start_action) | |
1538 | break; | |
1539 | } | |
1540 | ||
1541 | return 0; | |
1542 | out: | |
1543 | tbl->action++; | |
1544 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1545 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1546 | return 0; | |
1547 | ||
1548 | } | |
1549 | ||
77626355 BC |
1550 | /* |
1551 | * Check whether we should continue using same modulation mode, or | |
1552 | * begin search for a new mode, based on: | |
1553 | * 1) # tx successes or failures while using this mode | |
1554 | * 2) # times calling this function | |
1555 | * 3) elapsed time in this mode (not used, for now) | |
1556 | */ | |
c33104f0 | 1557 | static void rs_stay_in_table(struct iwl4965_lq_sta *lq_sta) |
b481de9c | 1558 | { |
bb8c093b | 1559 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c ZY |
1560 | int i; |
1561 | int active_tbl; | |
1562 | int flush_interval_passed = 0; | |
bf403db8 | 1563 | struct iwl_priv *priv; |
b481de9c | 1564 | |
bf403db8 | 1565 | priv = lq_sta->drv; |
c33104f0 | 1566 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1567 | |
c33104f0 | 1568 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1569 | |
77626355 | 1570 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1571 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1572 | |
77626355 | 1573 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1574 | if (lq_sta->flush_timer) |
b481de9c ZY |
1575 | flush_interval_passed = |
1576 | time_after(jiffies, | |
c33104f0 | 1577 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1578 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1579 | ||
77626355 BC |
1580 | /* |
1581 | * Check if we should allow search for new modulation mode. | |
1582 | * If many frames have failed or succeeded, or we've used | |
1583 | * this same modulation for a long time, allow search, and | |
1584 | * reset history stats that keep track of whether we should | |
1585 | * allow a new search. Also (below) reset all bitmaps and | |
1586 | * stats in active history. | |
1587 | */ | |
c33104f0 TW |
1588 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1589 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1590 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1591 | && (flush_interval_passed))) { |
eecd6e57 | 1592 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1593 | lq_sta->total_failed, |
1594 | lq_sta->total_success, | |
b481de9c | 1595 | flush_interval_passed); |
77626355 BC |
1596 | |
1597 | /* Allow search for new mode */ | |
c33104f0 TW |
1598 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1599 | lq_sta->total_failed = 0; | |
1600 | lq_sta->total_success = 0; | |
1601 | lq_sta->flush_timer = 0; | |
77626355 BC |
1602 | |
1603 | /* | |
1604 | * Else if we've used this modulation mode enough repetitions | |
1605 | * (regardless of elapsed time or success/failure), reset | |
1606 | * history bitmaps and rate-specific stats for all rates in | |
1607 | * active table. | |
1608 | */ | |
403ab56b | 1609 | } else { |
c33104f0 TW |
1610 | lq_sta->table_count++; |
1611 | if (lq_sta->table_count >= | |
1612 | lq_sta->table_count_limit) { | |
1613 | lq_sta->table_count = 0; | |
b481de9c | 1614 | |
eecd6e57 | 1615 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1616 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1617 | rs_rate_scale_clear_window( | |
1618 | &(tbl->win[i])); | |
1619 | } | |
1620 | } | |
1621 | ||
77626355 BC |
1622 | /* If transitioning to allow "search", reset all history |
1623 | * bitmaps and stats in active table (this will become the new | |
1624 | * "search" table). */ | |
c33104f0 | 1625 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1626 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1627 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1628 | } | |
1629 | } | |
1630 | } | |
1631 | ||
77626355 BC |
1632 | /* |
1633 | * Do rate scaling and search for new modulation mode. | |
1634 | */ | |
c79dd5b5 | 1635 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
1636 | struct net_device *dev, |
1637 | struct ieee80211_hdr *hdr, | |
1638 | struct sta_info *sta) | |
1639 | { | |
270243a5 RR |
1640 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
1641 | struct ieee80211_hw *hw = local_to_hw(local); | |
1642 | struct ieee80211_conf *conf = &hw->conf; | |
b481de9c ZY |
1643 | int low = IWL_RATE_INVALID; |
1644 | int high = IWL_RATE_INVALID; | |
1645 | int index; | |
1646 | int i; | |
bb8c093b | 1647 | struct iwl4965_rate_scale_data *window = NULL; |
b481de9c ZY |
1648 | int current_tpt = IWL_INVALID_VALUE; |
1649 | int low_tpt = IWL_INVALID_VALUE; | |
1650 | int high_tpt = IWL_INVALID_VALUE; | |
1651 | u32 fail_count; | |
1652 | s8 scale_action = 0; | |
1653 | u16 fc, rate_mask; | |
1654 | u8 update_lq = 0; | |
c33104f0 | 1655 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 1656 | struct iwl4965_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1657 | u16 rate_scale_index_msk = 0; |
39e88504 | 1658 | u32 rate; |
b481de9c ZY |
1659 | u8 is_green = 0; |
1660 | u8 active_tbl = 0; | |
1661 | u8 done_search = 0; | |
1662 | u16 high_low; | |
a5e8b505 | 1663 | s32 sr; |
0c11b4de | 1664 | u8 tid = MAX_TID_COUNT; |
b481de9c ZY |
1665 | |
1666 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1667 | ||
1668 | fc = le16_to_cpu(hdr->frame_control); | |
1669 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1670 | /* Send management frames and broadcast/multicast data using | |
1671 | * lowest rate. */ | |
1672 | /* TODO: this could probably be improved.. */ | |
1673 | return; | |
1674 | } | |
1675 | ||
1676 | if (!sta || !sta->rate_ctrl_priv) | |
1677 | return; | |
1678 | ||
1679 | if (!priv->lq_mngr.lq_ready) { | |
1680 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1681 | return; | |
1682 | } | |
c33104f0 | 1683 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c | 1684 | |
faa29718 RR |
1685 | tid = rs_tl_add_packet(lq_sta, hdr); |
1686 | ||
77626355 BC |
1687 | /* |
1688 | * Select rate-scale / modulation-mode table to work with in | |
1689 | * the rest of this function: "search" if searching for better | |
1690 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1691 | */ | |
c33104f0 TW |
1692 | if (!lq_sta->search_better_tbl) |
1693 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1694 | else |
c33104f0 | 1695 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1696 | |
c33104f0 TW |
1697 | tbl = &(lq_sta->lq_info[active_tbl]); |
1698 | is_green = lq_sta->is_green; | |
b481de9c | 1699 | |
77626355 | 1700 | /* current tx rate */ |
8318d78a | 1701 | index = sta->last_txrate_idx; |
b481de9c ZY |
1702 | |
1703 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1704 | tbl->lq_type); | |
1705 | ||
77626355 | 1706 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1707 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1708 | |
1709 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1710 | ||
1711 | /* mask with station rate restriction */ | |
1712 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1713 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1714 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1715 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1716 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1717 | else |
1718 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1719 | lq_sta->supp_rates); |
b481de9c ZY |
1720 | |
1721 | } else | |
1722 | rate_scale_index_msk = rate_mask; | |
1723 | ||
1724 | if (!rate_scale_index_msk) | |
1725 | rate_scale_index_msk = rate_mask; | |
1726 | ||
07bc28ed GC |
1727 | if (!((1 << index) & rate_scale_index_msk)) { |
1728 | IWL_ERROR("Current Rate is not valid\n"); | |
1729 | return; | |
b481de9c ZY |
1730 | } |
1731 | ||
77626355 | 1732 | /* Get expected throughput table and history window for current rate */ |
07bc28ed GC |
1733 | if (!tbl->expected_tpt) { |
1734 | IWL_ERROR("tbl->expected_tpt is NULL\n"); | |
1735 | return; | |
1736 | } | |
b481de9c ZY |
1737 | |
1738 | window = &(tbl->win[index]); | |
1739 | ||
77626355 BC |
1740 | /* |
1741 | * If there is not enough history to calculate actual average | |
1742 | * throughput, keep analyzing results of more tx frames, without | |
1743 | * changing rate or mode (bypass most of the rest of this function). | |
1744 | * Set up new rate table in uCode only if old rate is not supported | |
1745 | * in current association (use new rate found above). | |
1746 | */ | |
b481de9c | 1747 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1748 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1749 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1750 | IWL_DEBUG_RATE("LQ: still below TH. succ=%d total=%d " | |
b481de9c ZY |
1751 | "for index %d\n", |
1752 | window->success_counter, window->counter, index); | |
77626355 BC |
1753 | |
1754 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1755 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1756 | |
1757 | /* Should we stay with this modulation mode, | |
1758 | * or search for a new one? */ | |
c33104f0 | 1759 | rs_stay_in_table(lq_sta); |
77626355 | 1760 | |
b481de9c ZY |
1761 | goto out; |
1762 | ||
77626355 BC |
1763 | /* Else we have enough samples; calculate estimate of |
1764 | * actual average throughput */ | |
07bc28ed GC |
1765 | } else { |
1766 | /*FIXME:RS remove this else if we don't get this error*/ | |
1767 | if (window->average_tpt != ((window->success_ratio * | |
1768 | tbl->expected_tpt[index] + 64) / 128)) { | |
1769 | IWL_ERROR("expected_tpt should have been calculated" | |
1770 | " by now\n"); | |
1771 | window->average_tpt = ((window->success_ratio * | |
b481de9c | 1772 | tbl->expected_tpt[index] + 64) / 128); |
07bc28ed GC |
1773 | } |
1774 | } | |
b481de9c | 1775 | |
77626355 | 1776 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1777 | if (lq_sta->search_better_tbl) { |
b481de9c | 1778 | |
77626355 BC |
1779 | /* If good success, continue using the "search" mode; |
1780 | * no need to send new link quality command, since we're | |
1781 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1782 | if (window->average_tpt > lq_sta->last_tpt) { |
1783 | ||
1784 | IWL_DEBUG_RATE("LQ: SWITCHING TO CURRENT TABLE " | |
1785 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1786 | window->success_ratio, | |
1787 | window->average_tpt, | |
1788 | lq_sta->last_tpt); | |
1789 | ||
1790 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1791 | lq_sta->enable_counter = 1; |
07bc28ed | 1792 | |
77626355 | 1793 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1794 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1795 | current_tpt = window->average_tpt; |
77626355 BC |
1796 | |
1797 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1798 | } else { |
07bc28ed GC |
1799 | |
1800 | IWL_DEBUG_RATE("LQ: GOING BACK TO THE OLD TABLE " | |
1801 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1802 | window->success_ratio, | |
1803 | window->average_tpt, | |
1804 | lq_sta->last_tpt); | |
1805 | ||
77626355 | 1806 | /* Nullify "search" table */ |
b481de9c | 1807 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1808 | |
1809 | /* Revert to "active" table */ | |
c33104f0 TW |
1810 | active_tbl = lq_sta->active_tbl; |
1811 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1812 | |
77626355 | 1813 | /* Revert to "active" rate and throughput info */ |
17744ff6 | 1814 | index = iwl4965_hwrate_to_plcp_idx( |
39e88504 | 1815 | tbl->current_rate); |
c33104f0 | 1816 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1817 | |
77626355 | 1818 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1819 | update_lq = 1; |
b481de9c | 1820 | } |
77626355 BC |
1821 | |
1822 | /* Either way, we've made a decision; modulation mode | |
1823 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1824 | lq_sta->search_better_tbl = 0; |
77626355 | 1825 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1826 | goto lq_update; |
1827 | } | |
1828 | ||
77626355 BC |
1829 | /* (Else) not in search of better modulation mode, try for better |
1830 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1831 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1832 | tbl->lq_type); |
1833 | low = high_low & 0xff; | |
1834 | high = (high_low >> 8) & 0xff; | |
1835 | ||
a5e8b505 GC |
1836 | sr = window->success_ratio; |
1837 | ||
77626355 | 1838 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1839 | current_tpt = window->average_tpt; |
b481de9c ZY |
1840 | if (low != IWL_RATE_INVALID) |
1841 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1842 | if (high != IWL_RATE_INVALID) |
1843 | high_tpt = tbl->win[high].average_tpt; | |
1844 | ||
a5e8b505 | 1845 | scale_action = 0; |
b481de9c | 1846 | |
77626355 | 1847 | /* Too many failures, decrease rate */ |
a5e8b505 | 1848 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
b481de9c ZY |
1849 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
1850 | scale_action = -1; | |
77626355 BC |
1851 | |
1852 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 1853 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
1854 | (high_tpt == IWL_INVALID_VALUE)) { |
1855 | ||
1856 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
1857 | scale_action = 1; | |
1858 | else if (low != IWL_RATE_INVALID) | |
1859 | scale_action = -1; | |
1860 | } | |
77626355 BC |
1861 | |
1862 | /* Both adjacent throughputs are measured, but neither one has better | |
1863 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1864 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1865 | (high_tpt != IWL_INVALID_VALUE) && | |
1866 | (low_tpt < current_tpt) && | |
1867 | (high_tpt < current_tpt)) | |
1868 | scale_action = 0; | |
77626355 BC |
1869 | |
1870 | /* At least one adjacent rate's throughput is measured, | |
1871 | * and may have better performance. */ | |
b481de9c | 1872 | else { |
77626355 | 1873 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1874 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1875 | /* Higher rate has better throughput */ |
a5e8b505 GC |
1876 | if (high_tpt > current_tpt && |
1877 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 1878 | scale_action = 1; |
a5e8b505 | 1879 | } else { |
b481de9c ZY |
1880 | IWL_DEBUG_RATE |
1881 | ("decrease rate because of high tpt\n"); | |
1882 | scale_action = -1; | |
1883 | } | |
77626355 BC |
1884 | |
1885 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1886 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1887 | /* Lower rate has better throughput */ |
b481de9c ZY |
1888 | if (low_tpt > current_tpt) { |
1889 | IWL_DEBUG_RATE | |
1890 | ("decrease rate because of low tpt\n"); | |
1891 | scale_action = -1; | |
a5e8b505 | 1892 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 1893 | scale_action = 1; |
a5e8b505 | 1894 | } |
b481de9c ZY |
1895 | } |
1896 | } | |
1897 | ||
77626355 BC |
1898 | /* Sanity check; asked for decrease, but success rate or throughput |
1899 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
1900 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
1901 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 1902 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
1903 | scale_action = 0; |
1904 | ||
1905 | switch (scale_action) { | |
1906 | case -1: | |
77626355 | 1907 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1908 | if (low != IWL_RATE_INVALID) { |
1909 | update_lq = 1; | |
1910 | index = low; | |
1911 | } | |
1912 | break; | |
1913 | case 1: | |
77626355 | 1914 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1915 | if (high != IWL_RATE_INVALID) { |
1916 | update_lq = 1; | |
1917 | index = high; | |
1918 | } | |
1919 | ||
1920 | break; | |
1921 | case 0: | |
77626355 | 1922 | /* No change */ |
b481de9c ZY |
1923 | default: |
1924 | break; | |
1925 | } | |
1926 | ||
eecd6e57 | 1927 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1928 | "high %d type %d\n", |
1929 | index, scale_action, low, high, tbl->lq_type); | |
1930 | ||
a5e8b505 | 1931 | lq_update: |
77626355 | 1932 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1933 | if (update_lq) { |
39e88504 | 1934 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
07bc28ed | 1935 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1936 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1937 | } |
77626355 BC |
1938 | |
1939 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1940 | rs_stay_in_table(lq_sta); |
b481de9c | 1941 | |
77626355 BC |
1942 | /* |
1943 | * Search for new modulation mode if we're: | |
1944 | * 1) Not changing rates right now | |
1945 | * 2) Not just finishing up a search | |
1946 | * 3) Allowing a new search | |
1947 | */ | |
47cfd463 | 1948 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 1949 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1950 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1951 | |
77626355 BC |
1952 | /* Select a new "search" modulation mode to try. |
1953 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1954 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1955 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1956 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1957 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1958 | else |
c33104f0 | 1959 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1960 | |
77626355 | 1961 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 1962 | if (lq_sta->search_better_tbl) { |
77626355 | 1963 | /* Access the "search" table, clear its history. */ |
c33104f0 | 1964 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
1965 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1966 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1967 | ||
77626355 | 1968 | /* Use new "search" start rate */ |
17744ff6 | 1969 | index = iwl4965_hwrate_to_plcp_idx( |
39e88504 | 1970 | tbl->current_rate); |
b481de9c | 1971 | |
eecd6e57 | 1972 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 | 1973 | tbl->current_rate, index); |
07bc28ed | 1974 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 1975 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1976 | } |
b481de9c | 1977 | |
77626355 BC |
1978 | /* If the "active" (non-search) mode was legacy, |
1979 | * and we've tried switching antennas, | |
1980 | * but we haven't been able to try HT modes (not available), | |
1981 | * stay with best antenna legacy modulation for a while | |
1982 | * before next round of mode comparisons. */ | |
c33104f0 | 1983 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1984 | if (is_legacy(tbl1->lq_type) && |
270243a5 | 1985 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
c33104f0 TW |
1986 | (lq_sta->action_counter >= 1)) { |
1987 | lq_sta->action_counter = 0; | |
eecd6e57 | 1988 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
bf403db8 | 1989 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
1990 | } |
1991 | ||
77626355 BC |
1992 | /* If we're in an HT mode, and all 3 mode switch actions |
1993 | * have been tried and compared, stay in this best modulation | |
1994 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
1995 | if (lq_sta->enable_counter && |
1996 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
1997 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
1998 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
1999 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 2000 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 2001 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 2002 | } |
c33104f0 | 2003 | lq_sta->action_counter = 0; |
bf403db8 | 2004 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2005 | } |
77626355 BC |
2006 | |
2007 | /* | |
2008 | * Else, don't search for a new modulation mode. | |
2009 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2010 | * 1) Not changing rates right now | |
2011 | * 2) Not just finishing up a search | |
2012 | * 3) flush timer is empty | |
2013 | */ | |
b481de9c | 2014 | } else { |
c33104f0 TW |
2015 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2016 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2017 | } |
2018 | ||
2019 | out: | |
39e88504 | 2020 | tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green); |
b481de9c | 2021 | i = index; |
8318d78a | 2022 | sta->last_txrate_idx = i; |
b481de9c | 2023 | |
8318d78a | 2024 | /* sta->txrate_idx is an index to A mode rates which start |
b481de9c ZY |
2025 | * at IWL_FIRST_OFDM_RATE |
2026 | */ | |
8318d78a JB |
2027 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
2028 | sta->txrate_idx = i - IWL_FIRST_OFDM_RATE; | |
b481de9c | 2029 | else |
8318d78a | 2030 | sta->txrate_idx = i; |
b481de9c ZY |
2031 | |
2032 | return; | |
2033 | } | |
2034 | ||
2035 | ||
c79dd5b5 | 2036 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2037 | struct ieee80211_conf *conf, |
b481de9c ZY |
2038 | struct sta_info *sta) |
2039 | { | |
c33104f0 | 2040 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 2041 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c | 2042 | int rate_idx; |
aade00ce | 2043 | int i; |
39e88504 | 2044 | u32 rate; |
aade00ce GC |
2045 | u8 use_green = rs_use_green(priv, conf); |
2046 | u8 active_tbl = 0; | |
2047 | u8 valid_tx_ant; | |
b481de9c ZY |
2048 | |
2049 | if (!sta || !sta->rate_ctrl_priv) | |
2050 | goto out; | |
2051 | ||
c33104f0 | 2052 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2053 | i = sta->last_txrate_idx; |
b481de9c | 2054 | |
c33104f0 | 2055 | if ((lq_sta->lq.sta_id == 0xff) && |
b481de9c ZY |
2056 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
2057 | goto out; | |
2058 | ||
aade00ce GC |
2059 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2060 | ||
c33104f0 TW |
2061 | if (!lq_sta->search_better_tbl) |
2062 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2063 | else |
c33104f0 | 2064 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2065 | |
c33104f0 | 2066 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2067 | |
2068 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2069 | i = 0; | |
2070 | ||
fde0db31 | 2071 | /* FIXME:RS: This is also wrong in 4965 */ |
1826dcc0 | 2072 | rate = iwl_rates[i].plcp; |
39e88504 GC |
2073 | rate |= RATE_MCS_ANT_B_MSK; |
2074 | rate &= ~RATE_MCS_ANT_A_MSK; | |
b481de9c ZY |
2075 | |
2076 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2077 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2078 | |
fde0db31 | 2079 | tbl->ant_type = ANT_B; |
39e88504 | 2080 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2081 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2082 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2083 | |
39e88504 GC |
2084 | rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green); |
2085 | tbl->current_rate = rate; | |
eecd6e57 | 2086 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2087 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2088 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2089 | out: |
2090 | return; | |
2091 | } | |
2092 | ||
1abbe498 | 2093 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
8318d78a JB |
2094 | struct ieee80211_supported_band *sband, |
2095 | struct sk_buff *skb, | |
1abbe498 | 2096 | struct rate_selection *sel) |
b481de9c ZY |
2097 | { |
2098 | ||
2099 | int i; | |
2100 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
270243a5 | 2101 | struct ieee80211_conf *conf = &local->hw.conf; |
b481de9c ZY |
2102 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2103 | struct sta_info *sta; | |
2bc454b0 | 2104 | u16 fc; |
c79dd5b5 | 2105 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
c33104f0 | 2106 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2107 | |
58826351 | 2108 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2109 | |
d0709a65 JB |
2110 | rcu_read_lock(); |
2111 | ||
b481de9c ZY |
2112 | sta = sta_info_get(local, hdr->addr1); |
2113 | ||
2bc454b0 MW |
2114 | /* Send management frames and broadcast/multicast data using lowest |
2115 | * rate. */ | |
2116 | fc = le16_to_cpu(hdr->frame_control); | |
2117 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || | |
2118 | !sta || !sta->rate_ctrl_priv) { | |
2e92e6f2 | 2119 | sel->rate_idx = rate_lowest_index(local, sband, sta); |
f4d6082d | 2120 | goto out; |
b481de9c ZY |
2121 | } |
2122 | ||
c33104f0 | 2123 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2124 | i = sta->last_txrate_idx; |
b481de9c | 2125 | |
c33104f0 TW |
2126 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
2127 | !lq_sta->ibss_sta_added) { | |
947b13a7 | 2128 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
0795af57 | 2129 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
2130 | |
2131 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2132 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2133 | print_mac(mac, hdr->addr1)); | |
4f40e4d9 | 2134 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2135 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2136 | } |
2137 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2138 | lq_sta->lq.sta_id = sta_id; |
2139 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2140 | lq_sta->ibss_sta_added = 1; | |
270243a5 | 2141 | rs_initialize_lq(priv, conf, sta); |
b481de9c | 2142 | } |
c33104f0 | 2143 | if (!lq_sta->ibss_sta_added) |
b481de9c ZY |
2144 | goto done; |
2145 | } | |
2146 | ||
f4d6082d | 2147 | done: |
1abbe498 | 2148 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
2e92e6f2 | 2149 | sel->rate_idx = rate_lowest_index(local, sband, sta); |
f4d6082d | 2150 | goto out; |
1abbe498 | 2151 | } |
b481de9c | 2152 | |
2e92e6f2 JB |
2153 | if (sband->band == IEEE80211_BAND_5GHZ) |
2154 | i -= IWL_FIRST_OFDM_RATE; | |
2155 | sel->rate_idx = i; | |
f4d6082d TW |
2156 | out: |
2157 | rcu_read_unlock(); | |
b481de9c ZY |
2158 | } |
2159 | ||
bf403db8 | 2160 | static void *rs_alloc_sta(void *priv_rate, gfp_t gfp) |
b481de9c | 2161 | { |
c33104f0 | 2162 | struct iwl4965_lq_sta *lq_sta; |
bf403db8 | 2163 | struct iwl_priv *priv; |
b481de9c ZY |
2164 | int i, j; |
2165 | ||
bf403db8 | 2166 | priv = (struct iwl_priv *)priv_rate; |
b481de9c ZY |
2167 | IWL_DEBUG_RATE("create station rate scale window\n"); |
2168 | ||
c33104f0 | 2169 | lq_sta = kzalloc(sizeof(struct iwl4965_lq_sta), gfp); |
b481de9c | 2170 | |
c33104f0 | 2171 | if (lq_sta == NULL) |
b481de9c | 2172 | return NULL; |
c33104f0 | 2173 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2174 | |
63fddb9f | 2175 | |
b481de9c ZY |
2176 | for (j = 0; j < LQ_SIZE; j++) |
2177 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2178 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c | 2179 | |
c33104f0 | 2180 | return lq_sta; |
b481de9c ZY |
2181 | } |
2182 | ||
2183 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
2184 | struct ieee80211_local *local, | |
2185 | struct sta_info *sta) | |
2186 | { | |
2187 | int i, j; | |
270243a5 | 2188 | struct ieee80211_conf *conf = &local->hw.conf; |
8318d78a | 2189 | struct ieee80211_supported_band *sband; |
c79dd5b5 | 2190 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
c33104f0 | 2191 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
b481de9c | 2192 | |
8318d78a JB |
2193 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
2194 | ||
c33104f0 | 2195 | lq_sta->flush_timer = 0; |
8318d78a JB |
2196 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
2197 | sta->txrate_idx = 3; | |
b481de9c ZY |
2198 | for (j = 0; j < LQ_SIZE; j++) |
2199 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2200 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c | 2201 | |
07bc28ed | 2202 | IWL_DEBUG_RATE("LQ: *** rate scale global init ***\n"); |
b481de9c ZY |
2203 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2204 | * the lowest or the highest rate.. Could consider using RSSI from | |
2205 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2206 | * after assoc.. */ | |
2207 | ||
c33104f0 | 2208 | lq_sta->ibss_sta_added = 0; |
b481de9c | 2209 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { |
947b13a7 | 2210 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 JP |
2211 | DECLARE_MAC_BUF(mac); |
2212 | ||
b481de9c | 2213 | /* for IBSS the call are from tasklet */ |
eecd6e57 | 2214 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
0795af57 | 2215 | print_mac(mac, sta->addr)); |
b481de9c ZY |
2216 | |
2217 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2218 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2219 | print_mac(mac, sta->addr)); | |
4f40e4d9 | 2220 | sta_id = iwl_add_station_flags(priv, sta->addr, |
67d62035 | 2221 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2222 | } |
2223 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2224 | lq_sta->lq.sta_id = sta_id; |
2225 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2226 | } |
2227 | /* FIXME: this is w/a remove it later */ | |
2228 | priv->assoc_station_added = 1; | |
2229 | } | |
2230 | ||
77626355 | 2231 | /* Find highest tx rate supported by hardware and destination station */ |
8318d78a JB |
2232 | for (i = 0; i < sband->n_bitrates; i++) |
2233 | if (sta->supp_rates[sband->band] & BIT(i)) | |
2234 | sta->txrate_idx = i; | |
2235 | ||
2236 | sta->last_txrate_idx = sta->txrate_idx; | |
2237 | /* WTF is with this bogus comment? A doesn't have cck rates */ | |
77626355 | 2238 | /* For MODE_IEEE80211A, cck rates are at end of rate table */ |
8318d78a JB |
2239 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
2240 | sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
b481de9c | 2241 | |
c33104f0 | 2242 | lq_sta->is_dup = 0; |
c33104f0 | 2243 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2244 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2245 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2246 | lq_sta->band = priv->band; |
77626355 BC |
2247 | /* |
2248 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2249 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2250 | */ | |
263b5f5a RR |
2251 | lq_sta->active_siso_rate = conf->ht_conf.supp_mcs_set[0] << 1; |
2252 | lq_sta->active_siso_rate |= conf->ht_conf.supp_mcs_set[0] & 0x1; | |
c33104f0 | 2253 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2254 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2255 | |
77626355 | 2256 | /* Same here */ |
263b5f5a RR |
2257 | lq_sta->active_mimo2_rate = conf->ht_conf.supp_mcs_set[1] << 1; |
2258 | lq_sta->active_mimo2_rate |= conf->ht_conf.supp_mcs_set[1] & 0x1; | |
fde0db31 GC |
2259 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2260 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2261 | ||
263b5f5a RR |
2262 | lq_sta->active_mimo3_rate = conf->ht_conf.supp_mcs_set[2] << 1; |
2263 | lq_sta->active_mimo3_rate |= conf->ht_conf.supp_mcs_set[2] & 0x1; | |
fde0db31 GC |
2264 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2265 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2266 | ||
07bc28ed | 2267 | IWL_DEBUG_RATE("SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2268 | lq_sta->active_siso_rate, |
fde0db31 GC |
2269 | lq_sta->active_mimo2_rate, |
2270 | lq_sta->active_mimo3_rate); | |
2271 | ||
07bc28ed GC |
2272 | /* These values will be overriden later */ |
2273 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; | |
2274 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2275 | ||
0c11b4de RR |
2276 | /* as default allow aggregation for all tids */ |
2277 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
98d7e09a | 2278 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 2279 | lq_sta->drv = priv; |
98d7e09a | 2280 | #endif |
b481de9c ZY |
2281 | |
2282 | if (priv->assoc_station_added) | |
2283 | priv->lq_mngr.lq_ready = 1; | |
2284 | ||
270243a5 | 2285 | rs_initialize_lq(priv, conf, sta); |
b481de9c ZY |
2286 | } |
2287 | ||
fde0db31 GC |
2288 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
2289 | struct iwl4965_lq_sta *lq_sta, | |
07bc28ed | 2290 | u32 new_rate) |
b481de9c | 2291 | { |
aade00ce | 2292 | struct iwl4965_scale_tbl_info tbl_type; |
b481de9c | 2293 | int index = 0; |
b481de9c | 2294 | int rate_idx; |
1b696de2 | 2295 | int repeat_rate = 0; |
aade00ce | 2296 | u8 ant_toggle_cnt = 0; |
b481de9c | 2297 | u8 use_ht_possible = 1; |
aade00ce | 2298 | u8 valid_tx_ant = 0; |
07bc28ed | 2299 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2300 | |
77626355 | 2301 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2302 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2303 | |
39e88504 | 2304 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2305 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2306 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2307 | &tbl_type, &rate_idx); |
2308 | ||
77626355 | 2309 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2310 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2311 | ant_toggle_cnt = 1; |
1b696de2 | 2312 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2313 | } else { |
1b696de2 | 2314 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2315 | } |
b481de9c ZY |
2316 | |
2317 | lq_cmd->general_params.mimo_delimiter = | |
2318 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2319 | |
2320 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2321 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2322 | |
07bc28ed GC |
2323 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2324 | lq_cmd->general_params.single_stream_ant_msk = | |
2325 | tbl_type.ant_type; | |
2326 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2327 | lq_cmd->general_params.dual_stream_ant_msk = | |
2328 | tbl_type.ant_type; | |
2329 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2330 | |
2331 | index++; | |
1b696de2 | 2332 | repeat_rate--; |
b481de9c | 2333 | |
aade00ce GC |
2334 | if (priv) |
2335 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2336 | ||
77626355 | 2337 | /* Fill rest of rate table */ |
b481de9c | 2338 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2339 | /* Repeat initial/next rate. |
2340 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2341 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2342 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2343 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2344 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2345 | ant_toggle_cnt++; | |
2346 | else if (priv && | |
2347 | rs_toggle_antenna(valid_tx_ant, | |
2348 | &new_rate, &tbl_type)) | |
2349 | ant_toggle_cnt = 1; | |
2350 | } | |
98d7e09a | 2351 | |
77626355 | 2352 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2353 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2354 | |
2355 | /* Fill next table entry */ | |
b481de9c | 2356 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2357 | cpu_to_le32(new_rate); |
1b696de2 | 2358 | repeat_rate--; |
b481de9c ZY |
2359 | index++; |
2360 | } | |
2361 | ||
39e88504 | 2362 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2363 | &rate_idx); |
2364 | ||
77626355 BC |
2365 | /* Indicate to uCode which entries might be MIMO. |
2366 | * If initial rate was MIMO, this will finally end up | |
2367 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2368 | if (is_mimo(tbl_type.lq_type)) |
2369 | lq_cmd->general_params.mimo_delimiter = index; | |
2370 | ||
77626355 | 2371 | /* Get next rate */ |
39e88504 GC |
2372 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2373 | use_ht_possible); | |
b481de9c | 2374 | |
77626355 | 2375 | /* How many times should we repeat the next rate? */ |
b481de9c | 2376 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2377 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2378 | ant_toggle_cnt++; | |
2379 | else if (priv && | |
2380 | rs_toggle_antenna(valid_tx_ant, | |
2381 | &new_rate, &tbl_type)) | |
2382 | ant_toggle_cnt = 1; | |
2383 | ||
1b696de2 | 2384 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2385 | } else { |
1b696de2 | 2386 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2387 | } |
b481de9c | 2388 | |
77626355 BC |
2389 | /* Don't allow HT rates after next pass. |
2390 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2391 | use_ht_possible = 0; |
2392 | ||
77626355 | 2393 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2394 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2395 | |
2396 | /* Fill next table entry */ | |
39e88504 | 2397 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2398 | |
2399 | index++; | |
1b696de2 | 2400 | repeat_rate--; |
b481de9c ZY |
2401 | } |
2402 | ||
5e1dd8dc | 2403 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2404 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2405 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2406 | } |
2407 | ||
2408 | static void *rs_alloc(struct ieee80211_local *local) | |
2409 | { | |
2410 | return local->hw.priv; | |
2411 | } | |
2412 | /* rate scale requires free function to be implemented */ | |
2413 | static void rs_free(void *priv_rate) | |
2414 | { | |
2415 | return; | |
2416 | } | |
2417 | ||
2418 | static void rs_clear(void *priv_rate) | |
2419 | { | |
c79dd5b5 | 2420 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
b481de9c ZY |
2421 | |
2422 | IWL_DEBUG_RATE("enter\n"); | |
2423 | ||
2424 | priv->lq_mngr.lq_ready = 0; | |
b481de9c ZY |
2425 | |
2426 | IWL_DEBUG_RATE("leave\n"); | |
2427 | } | |
2428 | ||
bf403db8 | 2429 | static void rs_free_sta(void *priv_rate, void *priv_sta) |
b481de9c | 2430 | { |
c33104f0 | 2431 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
bf403db8 | 2432 | struct iwl_priv *priv; |
b481de9c | 2433 | |
bf403db8 | 2434 | priv = (struct iwl_priv *)priv_rate; |
b481de9c | 2435 | IWL_DEBUG_RATE("enter\n"); |
c33104f0 | 2436 | kfree(lq_sta); |
b481de9c ZY |
2437 | IWL_DEBUG_RATE("leave\n"); |
2438 | } | |
2439 | ||
2440 | ||
93dc646a | 2441 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2442 | static int open_file_generic(struct inode *inode, struct file *file) |
2443 | { | |
2444 | file->private_data = inode->i_private; | |
2445 | return 0; | |
2446 | } | |
c33104f0 | 2447 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 2448 | u32 *rate_n_flags, int index) |
98d7e09a | 2449 | { |
bf403db8 EK |
2450 | struct iwl_priv *priv; |
2451 | ||
2452 | priv = lq_sta->drv; | |
39e88504 GC |
2453 | if (lq_sta->dbg_fixed_rate) { |
2454 | if (index < 12) { | |
2455 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2456 | } else { | |
2457 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2458 | *rate_n_flags = 0x800D; | |
2459 | else | |
2460 | *rate_n_flags = 0x820A; | |
2461 | } | |
98d7e09a | 2462 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2463 | } else { |
2464 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2465 | } |
98d7e09a | 2466 | } |
5ae212c9 | 2467 | |
98d7e09a ZY |
2468 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2469 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2470 | { | |
c33104f0 | 2471 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2472 | struct iwl_priv *priv; |
98d7e09a ZY |
2473 | char buf[64]; |
2474 | int buf_size; | |
2475 | u32 parsed_rate; | |
2476 | ||
bf403db8 | 2477 | priv = lq_sta->drv; |
98d7e09a ZY |
2478 | memset(buf, 0, sizeof(buf)); |
2479 | buf_size = min(count, sizeof(buf) - 1); | |
2480 | if (copy_from_user(buf, user_buf, buf_size)) | |
2481 | return -EFAULT; | |
2482 | ||
2483 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2484 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2485 | else |
39e88504 | 2486 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2487 | |
39e88504 GC |
2488 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2489 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2490 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2491 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2492 | |
2493 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2494 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2495 | |
39e88504 | 2496 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2497 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2498 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2499 | } |
2500 | ||
2501 | return count; | |
2502 | } | |
0209dc11 | 2503 | |
5ae212c9 ZY |
2504 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2505 | char __user *user_buf, size_t count, loff_t *ppos) | |
2506 | { | |
2507 | char buff[1024]; | |
2508 | int desc = 0; | |
2509 | int i = 0; | |
2510 | ||
c33104f0 | 2511 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2512 | |
c33104f0 | 2513 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2514 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2515 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2516 | lq_sta->active_legacy_rate); |
98d7e09a | 2517 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2518 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2519 | desc += sprintf(buff+desc, "general:" |
2520 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2521 | lq_sta->lq.general_params.flags, |
2522 | lq_sta->lq.general_params.mimo_delimiter, | |
2523 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2524 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2525 | |
2526 | desc += sprintf(buff+desc, "agg:" | |
2527 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2528 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2529 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2530 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2531 | |
2532 | desc += sprintf(buff+desc, | |
2533 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2534 | lq_sta->lq.general_params.start_rate_index[0], |
2535 | lq_sta->lq.general_params.start_rate_index[1], | |
2536 | lq_sta->lq.general_params.start_rate_index[2], | |
2537 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2538 | |
2539 | ||
2540 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2541 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2542 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2543 | |
2544 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2545 | } | |
2546 | ||
2547 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2548 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2549 | .read = rs_sta_dbgfs_scale_table_read, |
2550 | .open = open_file_generic, | |
2551 | }; | |
0209dc11 ZY |
2552 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2553 | char __user *user_buf, size_t count, loff_t *ppos) | |
2554 | { | |
2555 | char buff[1024]; | |
2556 | int desc = 0; | |
2557 | int i, j; | |
2558 | ||
c33104f0 | 2559 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2560 | for (i = 0; i < LQ_SIZE; i++) { |
2561 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2562 | "rate=0x%X\n", | |
c33104f0 TW |
2563 | lq_sta->active_tbl == i?"*":"x", |
2564 | lq_sta->lq_info[i].lq_type, | |
2565 | lq_sta->lq_info[i].is_SGI, | |
2566 | lq_sta->lq_info[i].is_fat, | |
2567 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2568 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2569 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2570 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2571 | "counter=%d success=%d %%=%d\n", |
2572 | lq_sta->lq_info[i].win[j].counter, | |
2573 | lq_sta->lq_info[i].win[j].success_counter, | |
2574 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2575 | } |
2576 | } | |
2577 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2578 | } | |
2579 | ||
2580 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2581 | .read = rs_sta_dbgfs_stats_table_read, | |
2582 | .open = open_file_generic, | |
2583 | }; | |
5ae212c9 | 2584 | |
93dc646a ZY |
2585 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2586 | struct dentry *dir) | |
2587 | { | |
c33104f0 TW |
2588 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2589 | lq_sta->rs_sta_dbgfs_scale_table_file = | |
0209dc11 | 2590 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2591 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2592 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2593 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2594 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2595 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2596 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2597 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2598 | |
93dc646a ZY |
2599 | } |
2600 | ||
2601 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2602 | { | |
c33104f0 TW |
2603 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2604 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); | |
2605 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2606 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2607 | } |
2608 | #endif | |
2609 | ||
b481de9c ZY |
2610 | static struct rate_control_ops rs_ops = { |
2611 | .module = NULL, | |
2612 | .name = RS_NAME, | |
2613 | .tx_status = rs_tx_status, | |
2614 | .get_rate = rs_get_rate, | |
2615 | .rate_init = rs_rate_init, | |
2616 | .clear = rs_clear, | |
2617 | .alloc = rs_alloc, | |
2618 | .free = rs_free, | |
2619 | .alloc_sta = rs_alloc_sta, | |
2620 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2621 | #ifdef CONFIG_MAC80211_DEBUGFS |
2622 | .add_sta_debugfs = rs_add_debugfs, | |
2623 | .remove_sta_debugfs = rs_remove_debugfs, | |
2624 | #endif | |
b481de9c ZY |
2625 | }; |
2626 | ||
bb8c093b | 2627 | int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) |
b481de9c ZY |
2628 | { |
2629 | struct ieee80211_local *local = hw_to_local(hw); | |
c79dd5b5 | 2630 | struct iwl_priv *priv = hw->priv; |
c33104f0 | 2631 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2632 | struct sta_info *sta; |
c33104f0 | 2633 | int cnt = 0, i; |
b481de9c ZY |
2634 | u32 samples = 0, success = 0, good = 0; |
2635 | unsigned long now = jiffies; | |
2636 | u32 max_time = 0; | |
2637 | u8 lq_type, antenna; | |
2638 | ||
d0709a65 JB |
2639 | rcu_read_lock(); |
2640 | ||
b481de9c ZY |
2641 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); |
2642 | if (!sta || !sta->rate_ctrl_priv) { | |
d0709a65 | 2643 | if (sta) |
b481de9c | 2644 | IWL_DEBUG_RATE("leave - no private rate data!\n"); |
d0709a65 | 2645 | else |
b481de9c | 2646 | IWL_DEBUG_RATE("leave - no station!\n"); |
d0709a65 | 2647 | rcu_read_unlock(); |
b481de9c ZY |
2648 | return sprintf(buf, "station %d not found\n", sta_id); |
2649 | } | |
2650 | ||
c33104f0 | 2651 | lq_sta = (void *)sta->rate_ctrl_priv; |
b481de9c | 2652 | |
c33104f0 | 2653 | lq_type = lq_sta->lq_info[lq_sta->active_tbl].lq_type; |
fde0db31 | 2654 | antenna = lq_sta->lq_info[lq_sta->active_tbl].ant_type; |
b481de9c ZY |
2655 | |
2656 | if (is_legacy(lq_type)) | |
2657 | i = IWL_RATE_54M_INDEX; | |
2658 | else | |
2659 | i = IWL_RATE_60M_INDEX; | |
2660 | while (1) { | |
2661 | u64 mask; | |
2662 | int j; | |
c33104f0 | 2663 | int active = lq_sta->active_tbl; |
b481de9c | 2664 | |
c33104f0 | 2665 | cnt += |
1826dcc0 | 2666 | sprintf(&buf[cnt], " %2dMbs: ", iwl_rates[i].ieee / 2); |
b481de9c ZY |
2667 | |
2668 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2669 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
c33104f0 TW |
2670 | buf[cnt++] = |
2671 | (lq_sta->lq_info[active].win[i].data & mask) | |
b481de9c ZY |
2672 | ? '1' : '0'; |
2673 | ||
c33104f0 TW |
2674 | samples += lq_sta->lq_info[active].win[i].counter; |
2675 | good += lq_sta->lq_info[active].win[i].success_counter; | |
2676 | success += lq_sta->lq_info[active].win[i].success_counter * | |
1826dcc0 | 2677 | iwl_rates[i].ieee; |
b481de9c | 2678 | |
c33104f0 | 2679 | if (lq_sta->lq_info[active].win[i].stamp) { |
b481de9c ZY |
2680 | int delta = |
2681 | jiffies_to_msecs(now - | |
c33104f0 | 2682 | lq_sta->lq_info[active].win[i].stamp); |
b481de9c ZY |
2683 | |
2684 | if (delta > max_time) | |
2685 | max_time = delta; | |
2686 | ||
c33104f0 | 2687 | cnt += sprintf(&buf[cnt], "%5dms\n", delta); |
b481de9c | 2688 | } else |
c33104f0 | 2689 | buf[cnt++] = '\n'; |
b481de9c | 2690 | |
bb8c093b | 2691 | j = iwl4965_get_prev_ieee_rate(i); |
b481de9c ZY |
2692 | if (j == i) |
2693 | break; | |
2694 | i = j; | |
2695 | } | |
2696 | ||
1826dcc0 TW |
2697 | /* |
2698 | * Display the average rate of all samples taken. | |
2699 | * NOTE: We multiply # of samples by 2 since the IEEE measurement | |
2700 | * added from iwl_rates is actually 2X the rate. | |
2701 | */ | |
b481de9c | 2702 | if (samples) |
c33104f0 | 2703 | cnt += sprintf(&buf[cnt], |
b481de9c ZY |
2704 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" |
2705 | "%3d%% success (%d good packets over %d tries)\n", | |
2706 | success / (2 * samples), (success * 5 / samples) % 10, | |
2707 | max_time, good * 100 / samples, good, samples); | |
2708 | else | |
c33104f0 TW |
2709 | cnt += sprintf(&buf[cnt], "\nAverage rate: 0Mbs\n"); |
2710 | ||
2711 | cnt += sprintf(&buf[cnt], "\nrate scale type %d antenna %d " | |
b481de9c | 2712 | "active_search %d rate index %d\n", lq_type, antenna, |
8318d78a | 2713 | lq_sta->search_better_tbl, sta->last_txrate_idx); |
b481de9c | 2714 | |
d0709a65 | 2715 | rcu_read_unlock(); |
c33104f0 | 2716 | return cnt; |
b481de9c ZY |
2717 | } |
2718 | ||
bb8c093b | 2719 | void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) |
b481de9c | 2720 | { |
c79dd5b5 | 2721 | struct iwl_priv *priv = hw->priv; |
b481de9c ZY |
2722 | |
2723 | priv->lq_mngr.lq_ready = 1; | |
2724 | } | |
2725 | ||
897e1cf2 | 2726 | int iwl4965_rate_control_register(void) |
b481de9c | 2727 | { |
897e1cf2 | 2728 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2729 | } |
2730 | ||
897e1cf2 | 2731 | void iwl4965_rate_control_unregister(void) |
b481de9c ZY |
2732 | { |
2733 | ieee80211_rate_control_unregister(&rs_ops); | |
2734 | } | |
2735 |