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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: | |
759ef89f | 22 | * Intel Linux Wireless <ilw@linux.intel.com> |
b481de9c ZY |
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 | ||
3e0d4cb1 | 38 | #include "iwl-dev.h" |
be1f3ab6 | 39 | #include "iwl-sta.h" |
857485c0 | 40 | #include "iwl-core.h" |
b481de9c | 41 | |
e227ceac | 42 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 43 | |
aade00ce | 44 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
45 | #define IWL_NUMBER_TRY 1 |
46 | #define IWL_HT_NUMBER_TRY 3 | |
47 | ||
77626355 BC |
48 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
49 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
50 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
51 | ||
52 | /* max time to accum history 2 seconds */ | |
53 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) | |
b481de9c ZY |
54 | |
55 | static u8 rs_ht_to_legacy[] = { | |
56 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
57 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
58 | IWL_RATE_6M_INDEX, | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
60 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
61 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
62 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
63 | }; | |
64 | ||
aade00ce GC |
65 | static const u8 ant_toggle_lookup[] = { |
66 | /*ANT_NONE -> */ ANT_NONE, | |
67 | /*ANT_A -> */ ANT_B, | |
68 | /*ANT_B -> */ ANT_C, | |
69 | /*ANT_AB -> */ ANT_BC, | |
70 | /*ANT_C -> */ ANT_A, | |
71 | /*ANT_AC -> */ ANT_AB, | |
72 | /*ANT_BC -> */ ANT_AC, | |
73 | /*ANT_ABC -> */ ANT_ABC, | |
74 | }; | |
75 | ||
77626355 | 76 | /** |
e227ceac | 77 | * struct iwl_rate_scale_data -- tx success history for one rate |
77626355 | 78 | */ |
e227ceac | 79 | struct iwl_rate_scale_data { |
77626355 BC |
80 | u64 data; /* bitmap of successful frames */ |
81 | s32 success_counter; /* number of frames successful */ | |
82 | s32 success_ratio; /* per-cent * 128 */ | |
83 | s32 counter; /* number of frames attempted */ | |
84 | s32 average_tpt; /* success ratio * expected throughput */ | |
b481de9c ZY |
85 | unsigned long stamp; |
86 | }; | |
87 | ||
77626355 | 88 | /** |
e227ceac | 89 | * struct iwl_scale_tbl_info -- tx params and success history for all rates |
77626355 | 90 | * |
e227ceac | 91 | * There are two of these in struct iwl_lq_sta, |
77626355 BC |
92 | * one for "active", and one for "search". |
93 | */ | |
e227ceac | 94 | struct iwl_scale_tbl_info { |
fde0db31 GC |
95 | enum iwl_table_type lq_type; |
96 | u8 ant_type; | |
77626355 BC |
97 | u8 is_SGI; /* 1 = short guard interval */ |
98 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
99 | u8 is_dup; /* 1 = duplicated data streams */ | |
100 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
101 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
39e88504 | 102 | u32 current_rate; /* rate_n_flags, uCode API format */ |
e227ceac | 103 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
104 | }; |
105 | ||
e227ceac | 106 | struct iwl_traffic_load { |
0c11b4de RR |
107 | unsigned long time_stamp; /* age of the oldest statistics */ |
108 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
109 | * slice */ | |
110 | u32 total; /* total num of packets during the | |
111 | * last TID_MAX_TIME_DIFF */ | |
112 | u8 queue_count; /* number of queues that has | |
113 | * been used since the last cleanup */ | |
114 | u8 head; /* start of the circular buffer */ | |
115 | }; | |
116 | ||
77626355 | 117 | /** |
e227ceac | 118 | * struct iwl_lq_sta -- driver's rate scaling private structure |
77626355 BC |
119 | * |
120 | * Pointer to this gets passed back and forth between driver and mac80211. | |
121 | */ | |
e227ceac | 122 | struct iwl_lq_sta { |
77626355 BC |
123 | u8 active_tbl; /* index of active table, range 0-1 */ |
124 | u8 enable_counter; /* indicates HT mode */ | |
125 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
126 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 127 | s32 last_tpt; |
77626355 BC |
128 | |
129 | /* The following determine when to search for a new mode */ | |
b481de9c | 130 | u32 table_count_limit; |
77626355 BC |
131 | u32 max_failure_limit; /* # failed frames before new search */ |
132 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 133 | u32 table_count; |
77626355 BC |
134 | u32 total_failed; /* total failed frames, any/all rates */ |
135 | u32 total_success; /* total successful frames, any/all rates */ | |
136 | u32 flush_timer; /* time staying in mode before new search */ | |
137 | ||
138 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
139 | u8 is_green; |
140 | u8 is_dup; | |
8318d78a | 141 | enum ieee80211_band band; |
b481de9c | 142 | u8 ibss_sta_added; |
77626355 BC |
143 | |
144 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 145 | u32 supp_rates; |
39e88504 | 146 | u16 active_legacy_rate; |
b481de9c | 147 | u16 active_siso_rate; |
fde0db31 GC |
148 | u16 active_mimo2_rate; |
149 | u16 active_mimo3_rate; | |
b481de9c | 150 | u16 active_rate_basic; |
77626355 | 151 | |
66c73db7 | 152 | struct iwl_link_quality_cmd lq; |
e227ceac TW |
153 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
154 | struct iwl_traffic_load load[TID_MAX_LOAD_COUNT]; | |
0c11b4de | 155 | u8 tx_agg_tid_en; |
5ae212c9 | 156 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 157 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 158 | struct dentry *rs_sta_dbgfs_stats_table_file; |
0c11b4de | 159 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; |
39e88504 | 160 | u32 dbg_fixed_rate; |
5ae212c9 | 161 | #endif |
6243065d | 162 | struct iwl_priv *drv; |
b7e35008 JB |
163 | |
164 | /* used to be in sta_info */ | |
165 | int last_txrate_idx; | |
b481de9c ZY |
166 | }; |
167 | ||
c79dd5b5 | 168 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 169 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
170 | struct ieee80211_sta *sta, |
171 | struct iwl_lq_sta *lq_sta); | |
fde0db31 | 172 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 173 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
b481de9c ZY |
174 | |
175 | ||
98d7e09a | 176 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
177 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
178 | u32 *rate_n_flags, int index); | |
98d7e09a | 179 | #else |
e227ceac TW |
180 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
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 | */ | |
a96a27f9 | 190 | /*FIXME:RS:need to separate 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 | ||
e227ceac | 236 | static void rs_rate_scale_clear_window(struct iwl_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 | { | |
3ac7f146 | 248 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
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 | */ | |
e227ceac | 255 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
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 | */ | |
e227ceac | 276 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 277 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
278 | { |
279 | u32 curr_time = jiffies_to_msecs(jiffies); | |
280 | u32 time_diff; | |
281 | s32 index; | |
e227ceac | 282 | struct iwl_traffic_load *tl = NULL; |
54dbb525 | 283 | u8 tid; |
0c11b4de | 284 | |
417f114b | 285 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
fd7c8a40 | 286 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
54dbb525 TW |
287 | tid = qc[0] & 0xf; |
288 | } else | |
faa29718 | 289 | return MAX_TID_COUNT; |
0c11b4de RR |
290 | |
291 | tl = &lq_data->load[tid]; | |
292 | ||
293 | curr_time -= curr_time % TID_ROUND_VALUE; | |
294 | ||
295 | /* Happens only for the first packet. Initialize the data */ | |
296 | if (!(tl->queue_count)) { | |
297 | tl->total = 1; | |
298 | tl->time_stamp = curr_time; | |
299 | tl->queue_count = 1; | |
300 | tl->head = 0; | |
301 | tl->packet_count[0] = 1; | |
faa29718 | 302 | return MAX_TID_COUNT; |
0c11b4de RR |
303 | } |
304 | ||
305 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
306 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
307 | ||
308 | /* The history is too long: remove data that is older than */ | |
309 | /* TID_MAX_TIME_DIFF */ | |
310 | if (index >= TID_QUEUE_MAX_SIZE) | |
311 | rs_tl_rm_old_stats(tl, curr_time); | |
312 | ||
313 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
314 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
315 | tl->total = tl->total + 1; | |
316 | ||
317 | if ((index + 1) > tl->queue_count) | |
318 | tl->queue_count = index + 1; | |
faa29718 RR |
319 | |
320 | return tid; | |
0c11b4de RR |
321 | } |
322 | ||
323 | /* | |
324 | get the traffic load value for tid | |
325 | */ | |
e227ceac | 326 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
327 | { |
328 | u32 curr_time = jiffies_to_msecs(jiffies); | |
329 | u32 time_diff; | |
330 | s32 index; | |
e227ceac | 331 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
332 | |
333 | if (tid >= TID_MAX_LOAD_COUNT) | |
334 | return 0; | |
335 | ||
336 | tl = &(lq_data->load[tid]); | |
337 | ||
338 | curr_time -= curr_time % TID_ROUND_VALUE; | |
339 | ||
340 | if (!(tl->queue_count)) | |
341 | return 0; | |
342 | ||
343 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
344 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
345 | ||
346 | /* The history is too long: remove data that is older than */ | |
347 | /* TID_MAX_TIME_DIFF */ | |
348 | if (index >= TID_QUEUE_MAX_SIZE) | |
349 | rs_tl_rm_old_stats(tl, curr_time); | |
350 | ||
351 | return tl->total; | |
352 | } | |
353 | ||
c79dd5b5 | 354 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 355 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 356 | struct ieee80211_sta *sta) |
0c11b4de | 357 | { |
ff550cb4 | 358 | if (rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { |
e174961c JB |
359 | IWL_DEBUG_HT("Starting Tx agg: STA: %pM tid: %d\n", |
360 | sta->addr, tid); | |
4b7679a5 | 361 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); |
0c11b4de RR |
362 | } |
363 | } | |
364 | ||
c79dd5b5 | 365 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 366 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 367 | struct ieee80211_sta *sta) |
0c11b4de RR |
368 | { |
369 | if ((tid < TID_MAX_LOAD_COUNT)) | |
370 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
371 | else if (tid == IWL_AGG_ALL_TID) | |
372 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
373 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
374 | } | |
375 | ||
39e88504 | 376 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 377 | { |
3ac7f146 TW |
378 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
379 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
380 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
381 | } |
382 | ||
77626355 BC |
383 | /** |
384 | * rs_collect_tx_data - Update the success/failure sliding window | |
385 | * | |
386 | * We keep a sliding window of the last 62 packets transmitted | |
387 | * at this rate. window->data contains the bitmask of successful | |
388 | * packets. | |
389 | */ | |
e227ceac | 390 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
99556438 RR |
391 | int scale_index, s32 tpt, int retries, |
392 | int successes) | |
b481de9c | 393 | { |
e227ceac | 394 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 395 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
396 | s32 fail_count; |
397 | ||
dc2453ae TW |
398 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
399 | return -EINVAL; | |
b481de9c | 400 | |
77626355 | 401 | /* Select data for current tx bit rate */ |
b481de9c ZY |
402 | window = &(windows[scale_index]); |
403 | ||
77626355 BC |
404 | /* |
405 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
406 | * history window; anything older isn't really relevant any more. | |
407 | * If we have filled up the sliding window, drop the oldest attempt; | |
408 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
409 | * subtract "1" from the success counter (this is the main reason | |
410 | * we keep these bitmaps!). | |
411 | */ | |
99556438 | 412 | while (retries > 0) { |
39e88504 GC |
413 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
414 | ||
415 | /* remove earliest */ | |
416 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
417 | ||
99556438 RR |
418 | if (window->data & mask) { |
419 | window->data &= ~mask; | |
39e88504 | 420 | window->success_counter--; |
99556438 | 421 | } |
b481de9c | 422 | } |
b481de9c | 423 | |
99556438 RR |
424 | /* Increment frames-attempted counter */ |
425 | window->counter++; | |
426 | ||
427 | /* Shift bitmap by one frame (throw away oldest history), | |
428 | * OR in "1", and increment "success" if this | |
429 | * frame was successful. */ | |
90d7795e | 430 | window->data <<= 1; |
99556438 | 431 | if (successes > 0) { |
39e88504 | 432 | window->success_counter++; |
99556438 RR |
433 | window->data |= 0x1; |
434 | successes--; | |
435 | } | |
77626355 | 436 | |
99556438 | 437 | retries--; |
b481de9c ZY |
438 | } |
439 | ||
77626355 | 440 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
441 | if (window->counter > 0) |
442 | window->success_ratio = 128 * (100 * window->success_counter) | |
443 | / window->counter; | |
444 | else | |
445 | window->success_ratio = IWL_INVALID_VALUE; | |
446 | ||
447 | fail_count = window->counter - window->success_counter; | |
448 | ||
77626355 | 449 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
450 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
451 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
452 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
453 | else | |
454 | window->average_tpt = IWL_INVALID_VALUE; | |
455 | ||
77626355 | 456 | /* Tag this window as having been updated */ |
b481de9c ZY |
457 | window->stamp = jiffies; |
458 | ||
dc2453ae | 459 | return 0; |
b481de9c ZY |
460 | } |
461 | ||
77626355 BC |
462 | /* |
463 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
464 | */ | |
39e88504 | 465 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
466 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
467 | struct iwl_scale_tbl_info *tbl, | |
468 | int index, u8 use_green) | |
b481de9c | 469 | { |
39e88504 GC |
470 | u32 rate_n_flags = 0; |
471 | ||
b481de9c | 472 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 473 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 474 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 475 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 476 | |
fde0db31 GC |
477 | } else if (is_Ht(tbl->lq_type)) { |
478 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 479 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 480 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 481 | } |
39e88504 | 482 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
483 | |
484 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 485 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 486 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 487 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 488 | else |
1826dcc0 | 489 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 490 | } else { |
978785a3 | 491 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
492 | } |
493 | ||
39e88504 | 494 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 495 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 496 | |
39e88504 GC |
497 | if (is_Ht(tbl->lq_type)) { |
498 | if (tbl->is_fat) { | |
499 | if (tbl->is_dup) | |
500 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
501 | else | |
502 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
503 | } | |
504 | if (tbl->is_SGI) | |
505 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
506 | ||
507 | if (use_green) { | |
508 | rate_n_flags |= RATE_MCS_GF_MSK; | |
509 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
510 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 511 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
512 | } |
513 | } | |
b481de9c | 514 | } |
39e88504 | 515 | return rate_n_flags; |
b481de9c ZY |
516 | } |
517 | ||
77626355 BC |
518 | /* |
519 | * Interpret uCode API's rate_n_flags format, | |
520 | * fill "search" or "active" tx mode table. | |
521 | */ | |
39e88504 | 522 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 523 | enum ieee80211_band band, |
e227ceac | 524 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
525 | int *rate_idx) |
526 | { | |
39e88504 GC |
527 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
528 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
529 | u8 mcs; | |
b481de9c | 530 | |
e7d326ac | 531 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 532 | |
fde0db31 | 533 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 534 | *rate_idx = -1; |
dc2453ae | 535 | return -EINVAL; |
b481de9c | 536 | } |
77626355 | 537 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
538 | tbl->is_fat = 0; |
539 | tbl->is_dup = 0; | |
fde0db31 GC |
540 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
541 | tbl->lq_type = LQ_NONE; | |
b481de9c | 542 | |
77626355 | 543 | /* legacy rate format */ |
39e88504 | 544 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 545 | if (num_of_ant == 1) { |
8318d78a | 546 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
547 | tbl->lq_type = LQ_A; |
548 | else | |
549 | tbl->lq_type = LQ_G; | |
b481de9c | 550 | } |
fde0db31 | 551 | /* HT rate format */ |
b481de9c | 552 | } else { |
39e88504 | 553 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
554 | tbl->is_SGI = 1; |
555 | ||
39e88504 GC |
556 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
557 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
558 | tbl->is_fat = 1; |
559 | ||
39e88504 | 560 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 561 | tbl->is_dup = 1; |
fde0db31 | 562 | |
39e88504 | 563 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 564 | |
39e88504 GC |
565 | /* SISO */ |
566 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
567 | if (num_of_ant == 1) |
568 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
569 | /* MIMO2 */ | |
39e88504 | 570 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
571 | if (num_of_ant == 2) |
572 | tbl->lq_type = LQ_MIMO2; | |
573 | /* MIMO3 */ | |
574 | } else { | |
575 | if (num_of_ant == 3) | |
576 | tbl->lq_type = LQ_MIMO3; | |
577 | } | |
b481de9c ZY |
578 | } |
579 | return 0; | |
580 | } | |
aade00ce GC |
581 | |
582 | /* switch to another antenna/antennas and return 1 */ | |
583 | /* if no other valid antenna found, return 0 */ | |
584 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 585 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 586 | { |
aade00ce GC |
587 | u8 new_ant_type; |
588 | ||
589 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
590 | return 0; | |
591 | ||
592 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
593 | return 0; | |
594 | ||
595 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
596 | ||
597 | while ((new_ant_type != tbl->ant_type) && | |
598 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
599 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
600 | ||
601 | if (new_ant_type == tbl->ant_type) | |
602 | return 0; | |
603 | ||
604 | tbl->ant_type = new_ant_type; | |
605 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
606 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
607 | return 1; | |
b481de9c ZY |
608 | } |
609 | ||
39e88504 | 610 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 611 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
612 | #if 0 |
613 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 614 | { |
3ac7f146 | 615 | return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
270243a5 | 616 | priv->current_ht_config.is_green_field && |
3ac7f146 | 617 | !priv->current_ht_config.non_GF_STA_present; |
f935a6da | 618 | } |
4f85f5b3 | 619 | #endif |
f935a6da GC |
620 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
621 | { | |
dc2453ae | 622 | return 0; |
b481de9c ZY |
623 | } |
624 | ||
625 | /** | |
626 | * rs_get_supported_rates - get the available rates | |
627 | * | |
628 | * if management frame or broadcast frame only return | |
629 | * basic available rates. | |
630 | * | |
631 | */ | |
e227ceac TW |
632 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
633 | struct ieee80211_hdr *hdr, | |
634 | enum iwl_table_type rate_type) | |
b481de9c | 635 | { |
eecd6e57 GC |
636 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
637 | lq_sta->active_rate_basic) | |
638 | return lq_sta->active_rate_basic; | |
639 | ||
640 | if (is_legacy(rate_type)) { | |
641 | return lq_sta->active_legacy_rate; | |
642 | } else { | |
b481de9c | 643 | if (is_siso(rate_type)) |
eecd6e57 | 644 | return lq_sta->active_siso_rate; |
fde0db31 | 645 | else if (is_mimo2(rate_type)) |
eecd6e57 | 646 | return lq_sta->active_mimo2_rate; |
b481de9c | 647 | else |
eecd6e57 | 648 | return lq_sta->active_mimo3_rate; |
c33104f0 | 649 | } |
b481de9c ZY |
650 | } |
651 | ||
bf403db8 EK |
652 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
653 | int rate_type) | |
b481de9c ZY |
654 | { |
655 | u8 high = IWL_RATE_INVALID; | |
656 | u8 low = IWL_RATE_INVALID; | |
657 | ||
01ebd063 | 658 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
659 | * the rate table */ |
660 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
661 | int i; | |
662 | u32 mask; | |
663 | ||
664 | /* Find the previous rate that is in the rate mask */ | |
665 | i = index - 1; | |
666 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
667 | if (rate_mask & mask) { | |
668 | low = i; | |
669 | break; | |
670 | } | |
671 | } | |
672 | ||
673 | /* Find the next rate that is in the rate mask */ | |
674 | i = index + 1; | |
675 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
676 | if (rate_mask & mask) { | |
677 | high = i; | |
678 | break; | |
679 | } | |
680 | } | |
681 | ||
682 | return (high << 8) | low; | |
683 | } | |
684 | ||
685 | low = index; | |
686 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 687 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
688 | if (low == IWL_RATE_INVALID) |
689 | break; | |
690 | if (rate_mask & (1 << low)) | |
691 | break; | |
692 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
693 | } | |
694 | ||
695 | high = index; | |
696 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 697 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
698 | if (high == IWL_RATE_INVALID) |
699 | break; | |
700 | if (rate_mask & (1 << high)) | |
701 | break; | |
702 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
703 | } | |
704 | ||
705 | return (high << 8) | low; | |
706 | } | |
707 | ||
e227ceac TW |
708 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
709 | struct iwl_scale_tbl_info *tbl, | |
710 | u8 scale_index, u8 ht_possible) | |
b481de9c | 711 | { |
b481de9c ZY |
712 | s32 low; |
713 | u16 rate_mask; | |
714 | u16 high_low; | |
715 | u8 switch_to_legacy = 0; | |
c33104f0 | 716 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
717 | |
718 | /* check if we need to switch from HT to legacy rates. | |
719 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
720 | * are always supported (spec demand) */ | |
721 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
722 | switch_to_legacy = 1; | |
723 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 724 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
725 | tbl->lq_type = LQ_A; |
726 | else | |
727 | tbl->lq_type = LQ_G; | |
728 | ||
69fdb309 | 729 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 730 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
731 | |
732 | tbl->is_fat = 0; | |
733 | tbl->is_SGI = 0; | |
734 | } | |
735 | ||
eecd6e57 | 736 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 737 | |
77626355 | 738 | /* Mask with station rate restriction */ |
b481de9c | 739 | if (is_legacy(tbl->lq_type)) { |
77626355 | 740 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 741 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 742 | rate_mask = (u16)(rate_mask & |
c33104f0 | 743 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 744 | else |
c33104f0 | 745 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
746 | } |
747 | ||
77626355 | 748 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 749 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
750 | low = scale_index; |
751 | goto out; | |
b481de9c ZY |
752 | } |
753 | ||
bf403db8 EK |
754 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
755 | tbl->lq_type); | |
b481de9c ZY |
756 | low = high_low & 0xff; |
757 | ||
39e88504 GC |
758 | if (low == IWL_RATE_INVALID) |
759 | low = scale_index; | |
760 | ||
761 | out: | |
978785a3 | 762 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
763 | } |
764 | ||
77626355 BC |
765 | /* |
766 | * mac80211 sends us Tx status | |
767 | */ | |
4b7679a5 JB |
768 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
769 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 770 | struct sk_buff *skb) |
b481de9c ZY |
771 | { |
772 | int status; | |
773 | u8 retries; | |
774 | int rs_index, index = 0; | |
417f114b | 775 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 776 | struct iwl_link_quality_cmd *table; |
b481de9c | 777 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 JB |
778 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
779 | struct ieee80211_hw *hw = priv->hw; | |
e039fa4a | 780 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac TW |
781 | struct iwl_rate_scale_data *window = NULL; |
782 | struct iwl_rate_scale_data *search_win = NULL; | |
39e88504 | 783 | u32 tx_rate; |
e227ceac TW |
784 | struct iwl_scale_tbl_info tbl_type; |
785 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c | 786 | u8 active_index = 0; |
b481de9c ZY |
787 | s32 tpt = 0; |
788 | ||
58826351 | 789 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c | 790 | |
417f114b TW |
791 | if (!ieee80211_is_data(hdr->frame_control) || |
792 | is_multicast_ether_addr(hdr->addr1)) | |
b481de9c ZY |
793 | return; |
794 | ||
99556438 | 795 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
796 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
797 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
798 | return; |
799 | ||
e6a9854b | 800 | retries = info->status.rates[0].count - 1; |
b481de9c ZY |
801 | |
802 | if (retries > 15) | |
803 | retries = 15; | |
804 | ||
05c914fe | 805 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 806 | !lq_sta->ibss_sta_added) |
f4d6082d | 807 | goto out; |
b481de9c | 808 | |
c33104f0 TW |
809 | table = &lq_sta->lq; |
810 | active_index = lq_sta->active_tbl; | |
b481de9c | 811 | |
c33104f0 TW |
812 | curr_tbl = &(lq_sta->lq_info[active_index]); |
813 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
e227ceac TW |
814 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
815 | search_win = (struct iwl_rate_scale_data *)&(search_tbl->win[0]); | |
b481de9c | 816 | |
77626355 BC |
817 | /* |
818 | * Ignore this Tx frame response if its initial rate doesn't match | |
819 | * that of latest Link Quality command. There may be stragglers | |
820 | * from a previous Link Quality command, but we're no longer interested | |
821 | * in those; they're either from the "active" mode while we're trying | |
822 | * to check "search" mode, or a prior "search" mode after we've moved | |
823 | * to a new "search" mode (which might become the new "active" mode). | |
824 | */ | |
39e88504 GC |
825 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
826 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
827 | if (priv->band == IEEE80211_BAND_5GHZ) |
828 | rs_index -= IWL_FIRST_OFDM_RATE; | |
829 | ||
e6a9854b JB |
830 | if ((info->status.rates[0].idx < 0) || |
831 | (tbl_type.is_SGI != !!(info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)) || | |
832 | (tbl_type.is_fat != !!(info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
833 | (tbl_type.is_dup != !!(info->status.rates[0].flags & IEEE80211_TX_RC_DUP_DATA)) || | |
834 | (tbl_type.ant_type != info->antenna_sel_tx) || | |
835 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) || | |
836 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
4c424e4c | 837 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e6a9854b | 838 | hw->wiphy->bands[info->band]->bitrates[info->status.rates[0].idx].bitrate)) { |
39e88504 | 839 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
d5e49036 MA |
840 | /* the last LQ command could failed so the LQ in ucode not |
841 | * the same in driver sync up | |
842 | */ | |
843 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
f4d6082d | 844 | goto out; |
b481de9c ZY |
845 | } |
846 | ||
77626355 | 847 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 848 | while (retries) { |
77626355 BC |
849 | /* Look up the rate and other info used for each tx attempt. |
850 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
851 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
852 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
853 | &tbl_type, &rs_index); |
854 | ||
77626355 BC |
855 | /* If type matches "search" table, |
856 | * add failure to "search" history */ | |
b481de9c | 857 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 858 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
859 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
860 | if (search_tbl->expected_tpt) | |
861 | tpt = search_tbl->expected_tpt[rs_index]; | |
862 | else | |
863 | tpt = 0; | |
99556438 | 864 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
865 | |
866 | /* Else if type matches "current/active" table, | |
867 | * add failure to "current/active" history */ | |
b481de9c | 868 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 869 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
870 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
871 | if (curr_tbl->expected_tpt) | |
872 | tpt = curr_tbl->expected_tpt[rs_index]; | |
873 | else | |
874 | tpt = 0; | |
99556438 | 875 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 876 | } |
77626355 BC |
877 | |
878 | /* If not searching for a new mode, increment failed counter | |
879 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
880 | if (lq_sta->stay_in_tbl) |
881 | lq_sta->total_failed++; | |
b481de9c ZY |
882 | --retries; |
883 | index++; | |
884 | ||
885 | } | |
886 | ||
77626355 BC |
887 | /* |
888 | * Find (by rate) the history window to update with final Tx attempt; | |
889 | * if Tx was successful first try, use original rate, | |
890 | * else look up the rate that was, finally, successful. | |
891 | */ | |
39e88504 GC |
892 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
893 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 894 | |
77626355 | 895 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 896 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 897 | |
77626355 BC |
898 | /* If type matches "search" table, |
899 | * add final tx status to "search" history */ | |
b481de9c | 900 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 901 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
902 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
903 | if (search_tbl->expected_tpt) | |
904 | tpt = search_tbl->expected_tpt[rs_index]; | |
905 | else | |
906 | tpt = 0; | |
e039fa4a | 907 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 908 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
909 | info->status.ampdu_ack_len, |
910 | info->status.ampdu_ack_map); | |
99556438 RR |
911 | else |
912 | rs_collect_tx_data(search_win, rs_index, tpt, | |
913 | 1, status); | |
77626355 BC |
914 | /* Else if type matches "current/active" table, |
915 | * add final tx status to "current/active" history */ | |
b481de9c | 916 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 917 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
918 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
919 | if (curr_tbl->expected_tpt) | |
920 | tpt = curr_tbl->expected_tpt[rs_index]; | |
921 | else | |
922 | tpt = 0; | |
e039fa4a | 923 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 924 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
925 | info->status.ampdu_ack_len, |
926 | info->status.ampdu_ack_map); | |
99556438 RR |
927 | else |
928 | rs_collect_tx_data(window, rs_index, tpt, | |
929 | 1, status); | |
b481de9c ZY |
930 | } |
931 | ||
77626355 BC |
932 | /* If not searching for new mode, increment success/failed counter |
933 | * ... these help determine when to start searching again */ | |
c33104f0 | 934 | if (lq_sta->stay_in_tbl) { |
e039fa4a JB |
935 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
936 | lq_sta->total_success += info->status.ampdu_ack_map; | |
99556438 | 937 | lq_sta->total_failed += |
e039fa4a | 938 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
939 | } else { |
940 | if (status) | |
941 | lq_sta->total_success++; | |
942 | else | |
943 | lq_sta->total_failed++; | |
944 | } | |
b481de9c ZY |
945 | } |
946 | ||
77626355 | 947 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c AM |
948 | if (sta && sta->supp_rates[sband->band]) |
949 | rs_rate_scale_perform(priv, hdr, sta, lq_sta); | |
f4d6082d | 950 | out: |
b481de9c ZY |
951 | return; |
952 | } | |
953 | ||
77626355 BC |
954 | /* |
955 | * Begin a period of staying with a selected modulation mode. | |
956 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
957 | * Set frame tx success limits according to legacy vs. high-throughput, | |
958 | * and reset overall (spanning all rates) tx success history statistics. | |
959 | * These control how long we stay using same modulation mode before | |
960 | * searching for a new mode. | |
961 | */ | |
bf403db8 | 962 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 963 | struct iwl_lq_sta *lq_sta) |
b481de9c | 964 | { |
eecd6e57 | 965 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 966 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 967 | if (is_legacy) { |
c33104f0 TW |
968 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
969 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
970 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 971 | } else { |
c33104f0 TW |
972 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
973 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
974 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 975 | } |
c33104f0 TW |
976 | lq_sta->table_count = 0; |
977 | lq_sta->total_failed = 0; | |
978 | lq_sta->total_success = 0; | |
b481de9c ZY |
979 | } |
980 | ||
77626355 BC |
981 | /* |
982 | * Find correct throughput table for given mode of modulation | |
983 | */ | |
e227ceac TW |
984 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
985 | struct iwl_scale_tbl_info *tbl) | |
b481de9c ZY |
986 | { |
987 | if (is_legacy(tbl->lq_type)) { | |
988 | if (!is_a_band(tbl->lq_type)) | |
989 | tbl->expected_tpt = expected_tpt_G; | |
990 | else | |
991 | tbl->expected_tpt = expected_tpt_A; | |
992 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 993 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
994 | if (tbl->is_SGI) |
995 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
996 | else | |
997 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
998 | else if (tbl->is_SGI) | |
999 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1000 | else | |
1001 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1002 | ||
fde0db31 | 1003 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1004 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1005 | if (tbl->is_SGI) |
1006 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1007 | else | |
1008 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1009 | else if (tbl->is_SGI) | |
1010 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1011 | else | |
1012 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1013 | } else | |
1014 | tbl->expected_tpt = expected_tpt_G; | |
1015 | } | |
1016 | ||
77626355 BC |
1017 | /* |
1018 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1019 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1020 | * above the current measured throughput of "active" mode, to give new mode | |
1021 | * a fair chance to prove itself without too many challenges. | |
1022 | * | |
1023 | * This gets called when transitioning to more aggressive modulation | |
1024 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1025 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1026 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1027 | * bit rate will typically need to increase, but not if performance was bad. | |
1028 | */ | |
c79dd5b5 | 1029 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1030 | struct iwl_lq_sta *lq_sta, |
1031 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1032 | u16 rate_mask, s8 index) |
b481de9c | 1033 | { |
77626355 | 1034 | /* "active" values */ |
e227ceac | 1035 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1036 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1037 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1038 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1039 | |
1040 | /* expected "search" throughput */ | |
1041 | s32 *tpt_tbl = tbl->expected_tpt; | |
1042 | ||
1043 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1044 | u16 high_low; |
f935a6da | 1045 | s8 rate = index; |
b481de9c ZY |
1046 | |
1047 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1048 | ||
1049 | for (; ;) { | |
bf403db8 EK |
1050 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1051 | tbl->lq_type); | |
b481de9c ZY |
1052 | |
1053 | low = high_low & 0xff; | |
1054 | high = (high_low >> 8) & 0xff; | |
1055 | ||
77626355 BC |
1056 | /* |
1057 | * Lower the "search" bit rate, to give new "search" mode | |
1058 | * approximately the same throughput as "active" if: | |
1059 | * | |
1060 | * 1) "Active" mode has been working modestly well (but not | |
1061 | * great), and expected "search" throughput (under perfect | |
1062 | * conditions) at candidate rate is above the actual | |
1063 | * measured "active" throughput (but less than expected | |
1064 | * "active" throughput under perfect conditions). | |
1065 | * OR | |
1066 | * 2) "Active" mode has been working perfectly or very well | |
1067 | * and expected "search" throughput (under perfect | |
1068 | * conditions) at candidate rate is above expected | |
1069 | * "active" throughput (under perfect conditions). | |
1070 | */ | |
c33104f0 | 1071 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1072 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1073 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1074 | (tpt_tbl[rate] <= active_tpt))) || | |
1075 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1076 | (tpt_tbl[rate] > active_tpt))) { | |
1077 | ||
77626355 BC |
1078 | /* (2nd or later pass) |
1079 | * If we've already tried to raise the rate, and are | |
1080 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1081 | if (start_hi != IWL_RATE_INVALID) { |
1082 | new_rate = start_hi; | |
1083 | break; | |
1084 | } | |
77626355 | 1085 | |
b481de9c | 1086 | new_rate = rate; |
77626355 BC |
1087 | |
1088 | /* Loop again with lower rate */ | |
b481de9c ZY |
1089 | if (low != IWL_RATE_INVALID) |
1090 | rate = low; | |
77626355 BC |
1091 | |
1092 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1093 | else |
1094 | break; | |
77626355 BC |
1095 | |
1096 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1097 | } else { |
77626355 BC |
1098 | /* (2nd or later pass) |
1099 | * If we've already tried to lower the rate, and are | |
1100 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1101 | if (new_rate != IWL_RATE_INVALID) |
1102 | break; | |
77626355 BC |
1103 | |
1104 | /* Loop again with higher rate */ | |
b481de9c ZY |
1105 | else if (high != IWL_RATE_INVALID) { |
1106 | start_hi = high; | |
1107 | rate = high; | |
77626355 BC |
1108 | |
1109 | /* Higher rate not available, use the original */ | |
b481de9c | 1110 | } else { |
90d7795e | 1111 | new_rate = rate; |
b481de9c ZY |
1112 | break; |
1113 | } | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | return new_rate; | |
1118 | } | |
b481de9c | 1119 | |
77626355 BC |
1120 | /* |
1121 | * Set up search table for MIMO | |
1122 | */ | |
fde0db31 | 1123 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1124 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1125 | struct ieee80211_conf *conf, |
4b7679a5 | 1126 | struct ieee80211_sta *sta, |
e227ceac | 1127 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1128 | { |
b481de9c ZY |
1129 | u16 rate_mask; |
1130 | s32 rate; | |
c33104f0 | 1131 | s8 is_green = lq_sta->is_green; |
b481de9c | 1132 | |
ae5eb026 | 1133 | if (!conf->ht.enabled || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1134 | return -1; |
1135 | ||
d9fe60de | 1136 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1137 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1138 | return -1; |
1139 | ||
77626355 | 1140 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1141 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1142 | return -1; |
1143 | ||
eecd6e57 | 1144 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1145 | |
1146 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1147 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1148 | tbl->action = 0; |
39e88504 GC |
1149 | rate_mask = lq_sta->active_mimo2_rate; |
1150 | ||
270243a5 | 1151 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1152 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1153 | tbl->is_fat = 1; |
1154 | else | |
1155 | tbl->is_fat = 0; | |
1156 | ||
39e88504 | 1157 | /* FIXME: - don't toggle SGI here |
b481de9c | 1158 | if (tbl->is_fat) { |
270243a5 | 1159 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1160 | tbl->is_SGI = 1; |
1161 | else | |
1162 | tbl->is_SGI = 0; | |
270243a5 | 1163 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1164 | tbl->is_SGI = 1; |
1165 | else | |
1166 | tbl->is_SGI = 0; | |
39e88504 | 1167 | */ |
b481de9c | 1168 | |
eecd6e57 | 1169 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1170 | |
f935a6da | 1171 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1172 | |
eecd6e57 | 1173 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1174 | |
1175 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1176 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1177 | rate, rate_mask); |
b481de9c | 1178 | return -1; |
39e88504 | 1179 | } |
978785a3 | 1180 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
b481de9c | 1181 | |
eecd6e57 | 1182 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1183 | tbl->current_rate, is_green); |
dc2453ae | 1184 | return 0; |
fde0db31 | 1185 | } |
b481de9c | 1186 | |
77626355 BC |
1187 | /* |
1188 | * Set up search table for SISO | |
1189 | */ | |
c79dd5b5 | 1190 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1191 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1192 | struct ieee80211_conf *conf, |
4b7679a5 | 1193 | struct ieee80211_sta *sta, |
e227ceac | 1194 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1195 | { |
b481de9c | 1196 | u16 rate_mask; |
c33104f0 | 1197 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1198 | s32 rate; |
1199 | ||
ae5eb026 | 1200 | if (!conf->ht.enabled || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1201 | return -1; |
1202 | ||
eecd6e57 | 1203 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1204 | |
c33104f0 | 1205 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1206 | tbl->lq_type = LQ_SISO; |
1207 | tbl->action = 0; | |
39e88504 | 1208 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1209 | |
270243a5 RR |
1210 | if (priv->current_ht_config.supported_chan_width |
1211 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1212 | tbl->is_fat = 1; |
1213 | else | |
1214 | tbl->is_fat = 0; | |
1215 | ||
39e88504 | 1216 | /* FIXME: - don't toggle SGI here |
b481de9c | 1217 | if (tbl->is_fat) { |
270243a5 | 1218 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1219 | tbl->is_SGI = 1; |
1220 | else | |
1221 | tbl->is_SGI = 0; | |
270243a5 | 1222 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1223 | tbl->is_SGI = 1; |
1224 | else | |
1225 | tbl->is_SGI = 0; | |
39e88504 | 1226 | */ |
b481de9c ZY |
1227 | |
1228 | if (is_green) | |
39e88504 | 1229 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1230 | |
eecd6e57 | 1231 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1232 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1233 | |
eecd6e57 | 1234 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1235 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1236 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1237 | rate, rate_mask); |
1238 | return -1; | |
1239 | } | |
978785a3 | 1240 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
eecd6e57 | 1241 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1242 | tbl->current_rate, is_green); |
403ab56b | 1243 | return 0; |
b481de9c ZY |
1244 | } |
1245 | ||
77626355 BC |
1246 | /* |
1247 | * Try to switch to new modulation mode from legacy | |
1248 | */ | |
c79dd5b5 | 1249 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1250 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1251 | struct ieee80211_conf *conf, |
4b7679a5 | 1252 | struct ieee80211_sta *sta, |
b481de9c ZY |
1253 | int index) |
1254 | { | |
e227ceac TW |
1255 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1256 | struct iwl_scale_tbl_info *search_tbl = | |
1257 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1258 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1259 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1260 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1261 | u8 start_action = tbl->action; |
fde0db31 | 1262 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1263 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1264 | int ret = 0; |
b481de9c ZY |
1265 | |
1266 | for (; ;) { | |
1267 | switch (tbl->action) { | |
3110bef7 GC |
1268 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1269 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
f935a6da | 1270 | IWL_DEBUG_RATE("LQ: Legacy toggle Antenna\n"); |
b481de9c | 1271 | |
c33104f0 | 1272 | lq_sta->action_counter++; |
77626355 | 1273 | |
3110bef7 GC |
1274 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1275 | tx_chains_num <= 1) || | |
1276 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1277 | tx_chains_num <= 2)) | |
1278 | break; | |
1279 | ||
77626355 | 1280 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1281 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1282 | break; | |
77626355 | 1283 | |
77626355 | 1284 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1285 | memcpy(search_tbl, tbl, sz); |
1286 | ||
aade00ce GC |
1287 | if (rs_toggle_antenna(valid_tx_ant, |
1288 | &search_tbl->current_rate, search_tbl)) { | |
3110bef7 | 1289 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1290 | goto out; |
1291 | } | |
a5e8b505 | 1292 | break; |
b481de9c | 1293 | case IWL_LEGACY_SWITCH_SISO: |
eecd6e57 | 1294 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1295 | |
1296 | /* Set up search table to try SISO */ | |
b481de9c | 1297 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1298 | search_tbl->is_SGI = 0; |
c33104f0 | 1299 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1300 | search_tbl, index); |
dc2453ae | 1301 | if (!ret) { |
c33104f0 | 1302 | lq_sta->action_counter = 0; |
b481de9c | 1303 | goto out; |
dc2453ae | 1304 | } |
b481de9c ZY |
1305 | |
1306 | break; | |
3110bef7 GC |
1307 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1308 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1309 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
eecd6e57 | 1310 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1311 | |
1312 | /* Set up search table to try MIMO */ | |
b481de9c | 1313 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1314 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1315 | |
1316 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1317 | search_tbl->ant_type = ANT_AB; | |
1318 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1319 | search_tbl->ant_type = ANT_AC; | |
1320 | else | |
1321 | search_tbl->ant_type = ANT_BC; | |
1322 | ||
1323 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1324 | break; | |
1325 | ||
fde0db31 | 1326 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1327 | search_tbl, index); |
dc2453ae | 1328 | if (!ret) { |
c33104f0 | 1329 | lq_sta->action_counter = 0; |
b481de9c | 1330 | goto out; |
dc2453ae | 1331 | } |
b481de9c ZY |
1332 | break; |
1333 | } | |
1334 | tbl->action++; | |
3110bef7 GC |
1335 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1336 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1337 | |
1338 | if (tbl->action == start_action) | |
1339 | break; | |
1340 | ||
1341 | } | |
3110bef7 | 1342 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1343 | return 0; |
1344 | ||
3110bef7 GC |
1345 | out: |
1346 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1347 | tbl->action++; |
3110bef7 GC |
1348 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1349 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1350 | return 0; |
1351 | ||
1352 | } | |
1353 | ||
77626355 BC |
1354 | /* |
1355 | * Try to switch to new modulation mode from SISO | |
1356 | */ | |
c79dd5b5 | 1357 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1358 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1359 | struct ieee80211_conf *conf, |
4b7679a5 | 1360 | struct ieee80211_sta *sta, int index) |
b481de9c | 1361 | { |
c33104f0 | 1362 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1363 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1364 | struct iwl_scale_tbl_info *search_tbl = | |
1365 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1366 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1367 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1368 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1369 | u8 start_action = tbl->action; |
fde0db31 | 1370 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1371 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1372 | int ret; |
b481de9c ZY |
1373 | |
1374 | for (;;) { | |
c33104f0 | 1375 | lq_sta->action_counter++; |
b481de9c | 1376 | switch (tbl->action) { |
3110bef7 GC |
1377 | case IWL_SISO_SWITCH_ANTENNA1: |
1378 | case IWL_SISO_SWITCH_ANTENNA2: | |
eecd6e57 | 1379 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1380 | |
1381 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1382 | tx_chains_num <= 1) || | |
1383 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1384 | tx_chains_num <= 2)) | |
1385 | break; | |
1386 | ||
b481de9c ZY |
1387 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1388 | break; | |
b481de9c ZY |
1389 | |
1390 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1391 | if (rs_toggle_antenna(valid_tx_ant, |
3110bef7 | 1392 | &search_tbl->current_rate, search_tbl)) |
aade00ce | 1393 | goto out; |
a5e8b505 | 1394 | break; |
3110bef7 GC |
1395 | case IWL_SISO_SWITCH_MIMO2_AB: |
1396 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1397 | case IWL_SISO_SWITCH_MIMO2_BC: | |
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; |
3110bef7 GC |
1401 | |
1402 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1403 | search_tbl->ant_type = ANT_AB; | |
1404 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1405 | search_tbl->ant_type = ANT_AC; | |
1406 | else | |
1407 | search_tbl->ant_type = ANT_BC; | |
1408 | ||
1409 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1410 | break; | |
1411 | ||
fde0db31 | 1412 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1413 | search_tbl, index); |
3110bef7 | 1414 | if (!ret) |
b481de9c ZY |
1415 | goto out; |
1416 | break; | |
1417 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1418 | if (!tbl->is_fat && |
1419 | !(priv->current_ht_config.sgf & | |
1420 | HT_SHORT_GI_20MHZ)) | |
1421 | break; | |
1422 | if (tbl->is_fat && | |
1423 | !(priv->current_ht_config.sgf & | |
1424 | HT_SHORT_GI_40MHZ)) | |
1425 | break; | |
1426 | ||
eecd6e57 | 1427 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1428 | |
b481de9c | 1429 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1430 | if (is_green) { |
1431 | if (!tbl->is_SGI) | |
1432 | break; | |
1433 | else | |
1434 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1435 | } |
39e88504 | 1436 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1437 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1438 | if (tbl->is_SGI) { |
1439 | s32 tpt = lq_sta->last_tpt / 100; | |
1440 | if (tpt >= search_tbl->expected_tpt[index]) | |
1441 | break; | |
1442 | } | |
978785a3 TW |
1443 | search_tbl->current_rate = |
1444 | rate_n_flags_from_tbl(priv, search_tbl, | |
1445 | index, is_green); | |
b481de9c ZY |
1446 | goto out; |
1447 | } | |
1448 | tbl->action++; | |
1449 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1450 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1451 | |
1452 | if (tbl->action == start_action) | |
1453 | break; | |
1454 | } | |
3110bef7 | 1455 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1456 | return 0; |
1457 | ||
1458 | out: | |
3110bef7 | 1459 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1460 | tbl->action++; |
1461 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1462 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1463 | return 0; |
1464 | } | |
1465 | ||
77626355 BC |
1466 | /* |
1467 | * Try to switch to new modulation mode from MIMO | |
1468 | */ | |
c79dd5b5 | 1469 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
e227ceac | 1470 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1471 | struct ieee80211_conf *conf, |
4b7679a5 | 1472 | struct ieee80211_sta *sta, int index) |
b481de9c | 1473 | { |
c33104f0 | 1474 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1475 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1476 | struct iwl_scale_tbl_info *search_tbl = | |
1477 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1478 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
e227ceac TW |
1479 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1480 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1481 | u8 start_action = tbl->action; |
3110bef7 GC |
1482 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1483 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
aade00ce | 1484 | int ret; |
b481de9c ZY |
1485 | |
1486 | for (;;) { | |
c33104f0 | 1487 | lq_sta->action_counter++; |
b481de9c | 1488 | switch (tbl->action) { |
3110bef7 GC |
1489 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1490 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
1491 | IWL_DEBUG_RATE("LQ: MIMO toggle Antennas\n"); | |
1492 | ||
1493 | if (tx_chains_num <= 2) | |
1494 | break; | |
1495 | ||
1496 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1497 | break; | |
1498 | ||
1499 | memcpy(search_tbl, tbl, sz); | |
1500 | if (rs_toggle_antenna(valid_tx_ant, | |
1501 | &search_tbl->current_rate, search_tbl)) | |
1502 | goto out; | |
1503 | break; | |
1504 | case IWL_MIMO2_SWITCH_SISO_A: | |
1505 | case IWL_MIMO2_SWITCH_SISO_B: | |
1506 | case IWL_MIMO2_SWITCH_SISO_C: | |
eecd6e57 | 1507 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1508 | |
77626355 | 1509 | /* Set up new search table for SISO */ |
b481de9c | 1510 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1511 | |
3110bef7 | 1512 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1513 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1514 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1515 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1516 | else |
1517 | search_tbl->ant_type = ANT_C; | |
1518 | ||
1519 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1520 | break; | |
b481de9c | 1521 | |
c33104f0 | 1522 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1523 | search_tbl, index); |
3110bef7 | 1524 | if (!ret) |
b481de9c | 1525 | goto out; |
3110bef7 | 1526 | |
b481de9c ZY |
1527 | break; |
1528 | ||
3110bef7 | 1529 | case IWL_MIMO2_SWITCH_GI: |
a9841013 EG |
1530 | if (!tbl->is_fat && |
1531 | !(priv->current_ht_config.sgf & | |
1532 | HT_SHORT_GI_20MHZ)) | |
1533 | break; | |
1534 | if (tbl->is_fat && | |
1535 | !(priv->current_ht_config.sgf & | |
1536 | HT_SHORT_GI_40MHZ)) | |
1537 | break; | |
1538 | ||
eecd6e57 | 1539 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1540 | |
1541 | /* Set up new search table for MIMO */ | |
b481de9c | 1542 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1543 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1544 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1545 | /* |
1546 | * If active table already uses the fastest possible | |
1547 | * modulation (dual stream with short guard interval), | |
1548 | * and it's working well, there's no need to look | |
1549 | * for a better type of modulation! | |
1550 | */ | |
39e88504 | 1551 | if (tbl->is_SGI) { |
c33104f0 | 1552 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1553 | if (tpt >= search_tbl->expected_tpt[index]) |
1554 | break; | |
b481de9c | 1555 | } |
978785a3 TW |
1556 | search_tbl->current_rate = |
1557 | rate_n_flags_from_tbl(priv, search_tbl, | |
1558 | index, is_green); | |
b481de9c ZY |
1559 | goto out; |
1560 | ||
1561 | } | |
1562 | tbl->action++; | |
3110bef7 GC |
1563 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1564 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1565 | |
1566 | if (tbl->action == start_action) | |
1567 | break; | |
1568 | } | |
3110bef7 | 1569 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1570 | return 0; |
1571 | out: | |
3110bef7 | 1572 | lq_sta->search_better_tbl = 1; |
b481de9c | 1573 | tbl->action++; |
3110bef7 GC |
1574 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1575 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1576 | return 0; |
1577 | ||
1578 | } | |
1579 | ||
77626355 BC |
1580 | /* |
1581 | * Check whether we should continue using same modulation mode, or | |
1582 | * begin search for a new mode, based on: | |
1583 | * 1) # tx successes or failures while using this mode | |
1584 | * 2) # times calling this function | |
1585 | * 3) elapsed time in this mode (not used, for now) | |
1586 | */ | |
e227ceac | 1587 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1588 | { |
e227ceac | 1589 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1590 | int i; |
1591 | int active_tbl; | |
1592 | int flush_interval_passed = 0; | |
bf403db8 | 1593 | struct iwl_priv *priv; |
b481de9c | 1594 | |
bf403db8 | 1595 | priv = lq_sta->drv; |
c33104f0 | 1596 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1597 | |
c33104f0 | 1598 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1599 | |
77626355 | 1600 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1601 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1602 | |
77626355 | 1603 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1604 | if (lq_sta->flush_timer) |
b481de9c ZY |
1605 | flush_interval_passed = |
1606 | time_after(jiffies, | |
c33104f0 | 1607 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1608 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1609 | ||
77626355 BC |
1610 | /* |
1611 | * Check if we should allow search for new modulation mode. | |
1612 | * If many frames have failed or succeeded, or we've used | |
1613 | * this same modulation for a long time, allow search, and | |
1614 | * reset history stats that keep track of whether we should | |
1615 | * allow a new search. Also (below) reset all bitmaps and | |
1616 | * stats in active history. | |
1617 | */ | |
c33104f0 TW |
1618 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1619 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1620 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1621 | && (flush_interval_passed))) { |
eecd6e57 | 1622 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1623 | lq_sta->total_failed, |
1624 | lq_sta->total_success, | |
b481de9c | 1625 | flush_interval_passed); |
77626355 BC |
1626 | |
1627 | /* Allow search for new mode */ | |
c33104f0 TW |
1628 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1629 | lq_sta->total_failed = 0; | |
1630 | lq_sta->total_success = 0; | |
1631 | lq_sta->flush_timer = 0; | |
77626355 BC |
1632 | |
1633 | /* | |
1634 | * Else if we've used this modulation mode enough repetitions | |
1635 | * (regardless of elapsed time or success/failure), reset | |
1636 | * history bitmaps and rate-specific stats for all rates in | |
1637 | * active table. | |
1638 | */ | |
403ab56b | 1639 | } else { |
c33104f0 TW |
1640 | lq_sta->table_count++; |
1641 | if (lq_sta->table_count >= | |
1642 | lq_sta->table_count_limit) { | |
1643 | lq_sta->table_count = 0; | |
b481de9c | 1644 | |
eecd6e57 | 1645 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1646 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1647 | rs_rate_scale_clear_window( | |
1648 | &(tbl->win[i])); | |
1649 | } | |
1650 | } | |
1651 | ||
77626355 BC |
1652 | /* If transitioning to allow "search", reset all history |
1653 | * bitmaps and stats in active table (this will become the new | |
1654 | * "search" table). */ | |
c33104f0 | 1655 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1656 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1657 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1658 | } | |
1659 | } | |
1660 | } | |
1661 | ||
77626355 BC |
1662 | /* |
1663 | * Do rate scaling and search for new modulation mode. | |
1664 | */ | |
c79dd5b5 | 1665 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 1666 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
1667 | struct ieee80211_sta *sta, |
1668 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 1669 | { |
4b7679a5 | 1670 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 1671 | struct ieee80211_conf *conf = &hw->conf; |
b481de9c ZY |
1672 | int low = IWL_RATE_INVALID; |
1673 | int high = IWL_RATE_INVALID; | |
1674 | int index; | |
1675 | int i; | |
e227ceac | 1676 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1677 | int current_tpt = IWL_INVALID_VALUE; |
1678 | int low_tpt = IWL_INVALID_VALUE; | |
1679 | int high_tpt = IWL_INVALID_VALUE; | |
1680 | u32 fail_count; | |
1681 | s8 scale_action = 0; | |
fd7c8a40 | 1682 | u16 rate_mask; |
b481de9c | 1683 | u8 update_lq = 0; |
e227ceac | 1684 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1685 | u16 rate_scale_index_msk = 0; |
39e88504 | 1686 | u32 rate; |
b481de9c ZY |
1687 | u8 is_green = 0; |
1688 | u8 active_tbl = 0; | |
1689 | u8 done_search = 0; | |
1690 | u16 high_low; | |
a5e8b505 | 1691 | s32 sr; |
0c11b4de | 1692 | u8 tid = MAX_TID_COUNT; |
b481de9c ZY |
1693 | |
1694 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1695 | ||
417f114b TW |
1696 | /* Send management frames and broadcast/multicast data using |
1697 | * lowest rate. */ | |
1698 | /* TODO: this could probably be improved.. */ | |
1699 | if (!ieee80211_is_data(hdr->frame_control) || | |
1700 | is_multicast_ether_addr(hdr->addr1)) | |
b481de9c | 1701 | return; |
b481de9c | 1702 | |
4b7679a5 | 1703 | if (!sta || !lq_sta) |
b481de9c ZY |
1704 | return; |
1705 | ||
4b7679a5 | 1706 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1707 | |
faa29718 RR |
1708 | tid = rs_tl_add_packet(lq_sta, hdr); |
1709 | ||
77626355 BC |
1710 | /* |
1711 | * Select rate-scale / modulation-mode table to work with in | |
1712 | * the rest of this function: "search" if searching for better | |
1713 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1714 | */ | |
c33104f0 TW |
1715 | if (!lq_sta->search_better_tbl) |
1716 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1717 | else |
c33104f0 | 1718 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1719 | |
c33104f0 TW |
1720 | tbl = &(lq_sta->lq_info[active_tbl]); |
1721 | is_green = lq_sta->is_green; | |
b481de9c | 1722 | |
77626355 | 1723 | /* current tx rate */ |
b7e35008 | 1724 | index = lq_sta->last_txrate_idx; |
b481de9c ZY |
1725 | |
1726 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1727 | tbl->lq_type); | |
1728 | ||
77626355 | 1729 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1730 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1731 | |
1732 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1733 | ||
1734 | /* mask with station rate restriction */ | |
1735 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1736 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1737 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1738 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1739 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1740 | else |
1741 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1742 | lq_sta->supp_rates); |
b481de9c ZY |
1743 | |
1744 | } else | |
1745 | rate_scale_index_msk = rate_mask; | |
1746 | ||
1747 | if (!rate_scale_index_msk) | |
1748 | rate_scale_index_msk = rate_mask; | |
1749 | ||
07bc28ed GC |
1750 | if (!((1 << index) & rate_scale_index_msk)) { |
1751 | IWL_ERROR("Current Rate is not valid\n"); | |
1752 | return; | |
b481de9c ZY |
1753 | } |
1754 | ||
77626355 | 1755 | /* Get expected throughput table and history window for current rate */ |
07bc28ed GC |
1756 | if (!tbl->expected_tpt) { |
1757 | IWL_ERROR("tbl->expected_tpt is NULL\n"); | |
1758 | return; | |
1759 | } | |
b481de9c ZY |
1760 | |
1761 | window = &(tbl->win[index]); | |
1762 | ||
77626355 BC |
1763 | /* |
1764 | * If there is not enough history to calculate actual average | |
1765 | * throughput, keep analyzing results of more tx frames, without | |
1766 | * changing rate or mode (bypass most of the rest of this function). | |
1767 | * Set up new rate table in uCode only if old rate is not supported | |
1768 | * in current association (use new rate found above). | |
1769 | */ | |
b481de9c | 1770 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1771 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1772 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1773 | IWL_DEBUG_RATE("LQ: still below TH. succ=%d total=%d " | |
b481de9c ZY |
1774 | "for index %d\n", |
1775 | window->success_counter, window->counter, index); | |
77626355 BC |
1776 | |
1777 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1778 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1779 | |
1780 | /* Should we stay with this modulation mode, | |
1781 | * or search for a new one? */ | |
c33104f0 | 1782 | rs_stay_in_table(lq_sta); |
77626355 | 1783 | |
b481de9c | 1784 | goto out; |
3110bef7 | 1785 | } |
b481de9c | 1786 | |
77626355 BC |
1787 | /* Else we have enough samples; calculate estimate of |
1788 | * actual average throughput */ | |
3110bef7 GC |
1789 | |
1790 | BUG_ON(window->average_tpt != ((window->success_ratio * | |
1791 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 1792 | |
77626355 | 1793 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1794 | if (lq_sta->search_better_tbl) { |
b481de9c | 1795 | |
77626355 BC |
1796 | /* If good success, continue using the "search" mode; |
1797 | * no need to send new link quality command, since we're | |
1798 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1799 | if (window->average_tpt > lq_sta->last_tpt) { |
1800 | ||
3110bef7 | 1801 | IWL_DEBUG_RATE("LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
1802 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1803 | window->success_ratio, | |
1804 | window->average_tpt, | |
1805 | lq_sta->last_tpt); | |
1806 | ||
1807 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1808 | lq_sta->enable_counter = 1; |
07bc28ed | 1809 | |
77626355 | 1810 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1811 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1812 | current_tpt = window->average_tpt; |
77626355 BC |
1813 | |
1814 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1815 | } else { |
07bc28ed GC |
1816 | |
1817 | IWL_DEBUG_RATE("LQ: GOING BACK TO THE OLD TABLE " | |
1818 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1819 | window->success_ratio, | |
1820 | window->average_tpt, | |
1821 | lq_sta->last_tpt); | |
1822 | ||
77626355 | 1823 | /* Nullify "search" table */ |
b481de9c | 1824 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1825 | |
1826 | /* Revert to "active" table */ | |
c33104f0 TW |
1827 | active_tbl = lq_sta->active_tbl; |
1828 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1829 | |
77626355 | 1830 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 1831 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 1832 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1833 | |
77626355 | 1834 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1835 | update_lq = 1; |
b481de9c | 1836 | } |
77626355 BC |
1837 | |
1838 | /* Either way, we've made a decision; modulation mode | |
1839 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1840 | lq_sta->search_better_tbl = 0; |
77626355 | 1841 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1842 | goto lq_update; |
1843 | } | |
1844 | ||
77626355 BC |
1845 | /* (Else) not in search of better modulation mode, try for better |
1846 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1847 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1848 | tbl->lq_type); |
1849 | low = high_low & 0xff; | |
1850 | high = (high_low >> 8) & 0xff; | |
1851 | ||
a5e8b505 GC |
1852 | sr = window->success_ratio; |
1853 | ||
77626355 | 1854 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1855 | current_tpt = window->average_tpt; |
b481de9c ZY |
1856 | if (low != IWL_RATE_INVALID) |
1857 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1858 | if (high != IWL_RATE_INVALID) |
1859 | high_tpt = tbl->win[high].average_tpt; | |
1860 | ||
a5e8b505 | 1861 | scale_action = 0; |
b481de9c | 1862 | |
77626355 | 1863 | /* Too many failures, decrease rate */ |
a5e8b505 | 1864 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
b481de9c ZY |
1865 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
1866 | scale_action = -1; | |
77626355 BC |
1867 | |
1868 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 1869 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
1870 | (high_tpt == IWL_INVALID_VALUE)) { |
1871 | ||
1872 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
1873 | scale_action = 1; | |
1874 | else if (low != IWL_RATE_INVALID) | |
1875 | scale_action = -1; | |
1876 | } | |
77626355 BC |
1877 | |
1878 | /* Both adjacent throughputs are measured, but neither one has better | |
1879 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1880 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1881 | (high_tpt != IWL_INVALID_VALUE) && | |
1882 | (low_tpt < current_tpt) && | |
1883 | (high_tpt < current_tpt)) | |
1884 | scale_action = 0; | |
77626355 BC |
1885 | |
1886 | /* At least one adjacent rate's throughput is measured, | |
1887 | * and may have better performance. */ | |
b481de9c | 1888 | else { |
77626355 | 1889 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1890 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1891 | /* Higher rate has better throughput */ |
a5e8b505 GC |
1892 | if (high_tpt > current_tpt && |
1893 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 1894 | scale_action = 1; |
a5e8b505 | 1895 | } else { |
b481de9c ZY |
1896 | IWL_DEBUG_RATE |
1897 | ("decrease rate because of high tpt\n"); | |
1898 | scale_action = -1; | |
1899 | } | |
77626355 BC |
1900 | |
1901 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1902 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1903 | /* Lower rate has better throughput */ |
b481de9c ZY |
1904 | if (low_tpt > current_tpt) { |
1905 | IWL_DEBUG_RATE | |
1906 | ("decrease rate because of low tpt\n"); | |
1907 | scale_action = -1; | |
a5e8b505 | 1908 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 1909 | scale_action = 1; |
a5e8b505 | 1910 | } |
b481de9c ZY |
1911 | } |
1912 | } | |
1913 | ||
77626355 BC |
1914 | /* Sanity check; asked for decrease, but success rate or throughput |
1915 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
1916 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
1917 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 1918 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
1919 | scale_action = 0; |
1920 | ||
1921 | switch (scale_action) { | |
1922 | case -1: | |
77626355 | 1923 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1924 | if (low != IWL_RATE_INVALID) { |
1925 | update_lq = 1; | |
1926 | index = low; | |
1927 | } | |
1928 | break; | |
1929 | case 1: | |
77626355 | 1930 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1931 | if (high != IWL_RATE_INVALID) { |
1932 | update_lq = 1; | |
1933 | index = high; | |
1934 | } | |
1935 | ||
1936 | break; | |
1937 | case 0: | |
77626355 | 1938 | /* No change */ |
b481de9c ZY |
1939 | default: |
1940 | break; | |
1941 | } | |
1942 | ||
eecd6e57 | 1943 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1944 | "high %d type %d\n", |
1945 | index, scale_action, low, high, tbl->lq_type); | |
1946 | ||
a5e8b505 | 1947 | lq_update: |
77626355 | 1948 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1949 | if (update_lq) { |
978785a3 | 1950 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
07bc28ed | 1951 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1952 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1953 | } |
77626355 BC |
1954 | |
1955 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1956 | rs_stay_in_table(lq_sta); |
b481de9c | 1957 | |
77626355 BC |
1958 | /* |
1959 | * Search for new modulation mode if we're: | |
1960 | * 1) Not changing rates right now | |
1961 | * 2) Not just finishing up a search | |
1962 | * 3) Allowing a new search | |
1963 | */ | |
47cfd463 | 1964 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 1965 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1966 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1967 | |
77626355 BC |
1968 | /* Select a new "search" modulation mode to try. |
1969 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1970 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1971 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1972 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1973 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1974 | else |
c33104f0 | 1975 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1976 | |
77626355 | 1977 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 1978 | if (lq_sta->search_better_tbl) { |
77626355 | 1979 | /* Access the "search" table, clear its history. */ |
c33104f0 | 1980 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
1981 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1982 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1983 | ||
77626355 | 1984 | /* Use new "search" start rate */ |
e7d326ac | 1985 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 1986 | |
eecd6e57 | 1987 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 | 1988 | tbl->current_rate, index); |
07bc28ed | 1989 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 1990 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1991 | } |
b481de9c | 1992 | |
77626355 BC |
1993 | /* If the "active" (non-search) mode was legacy, |
1994 | * and we've tried switching antennas, | |
1995 | * but we haven't been able to try HT modes (not available), | |
1996 | * stay with best antenna legacy modulation for a while | |
1997 | * before next round of mode comparisons. */ | |
c33104f0 | 1998 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
ae5eb026 JB |
1999 | if (is_legacy(tbl1->lq_type) && !conf->ht.enabled && |
2000 | lq_sta->action_counter >= 1) { | |
c33104f0 | 2001 | lq_sta->action_counter = 0; |
eecd6e57 | 2002 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
bf403db8 | 2003 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2004 | } |
2005 | ||
77626355 BC |
2006 | /* If we're in an HT mode, and all 3 mode switch actions |
2007 | * have been tried and compared, stay in this best modulation | |
2008 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2009 | if (lq_sta->enable_counter && |
2010 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2011 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2012 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2013 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 2014 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 2015 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 2016 | } |
c33104f0 | 2017 | lq_sta->action_counter = 0; |
bf403db8 | 2018 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2019 | } |
77626355 BC |
2020 | |
2021 | /* | |
2022 | * Else, don't search for a new modulation mode. | |
2023 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2024 | * 1) Not changing rates right now | |
2025 | * 2) Not just finishing up a search | |
2026 | * 3) flush timer is empty | |
2027 | */ | |
b481de9c | 2028 | } else { |
c33104f0 TW |
2029 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2030 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2031 | } |
2032 | ||
2033 | out: | |
978785a3 | 2034 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
b481de9c | 2035 | i = index; |
b7e35008 | 2036 | lq_sta->last_txrate_idx = i; |
b481de9c | 2037 | |
b481de9c ZY |
2038 | return; |
2039 | } | |
2040 | ||
2041 | ||
c79dd5b5 | 2042 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2043 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2044 | struct ieee80211_sta *sta, |
2045 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2046 | { |
e227ceac | 2047 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2048 | int rate_idx; |
aade00ce | 2049 | int i; |
39e88504 | 2050 | u32 rate; |
aade00ce GC |
2051 | u8 use_green = rs_use_green(priv, conf); |
2052 | u8 active_tbl = 0; | |
2053 | u8 valid_tx_ant; | |
b481de9c | 2054 | |
4b7679a5 | 2055 | if (!sta || !lq_sta) |
b481de9c ZY |
2056 | goto out; |
2057 | ||
b7e35008 | 2058 | i = lq_sta->last_txrate_idx; |
b481de9c | 2059 | |
c33104f0 | 2060 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2061 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2062 | goto out; |
2063 | ||
aade00ce GC |
2064 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2065 | ||
c33104f0 TW |
2066 | if (!lq_sta->search_better_tbl) |
2067 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2068 | else |
c33104f0 | 2069 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2070 | |
c33104f0 | 2071 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2072 | |
2073 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2074 | i = 0; | |
2075 | ||
1826dcc0 | 2076 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2077 | tbl->ant_type = first_antenna(valid_tx_ant); |
2078 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2079 | |
2080 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2081 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2082 | |
39e88504 | 2083 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2084 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2085 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2086 | |
978785a3 | 2087 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2088 | tbl->current_rate = rate; |
eecd6e57 | 2089 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2090 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2091 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2092 | out: |
2093 | return; | |
2094 | } | |
2095 | ||
e6a9854b JB |
2096 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2097 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2098 | { |
2099 | ||
e6a9854b JB |
2100 | struct sk_buff *skb = txrc->skb; |
2101 | struct ieee80211_supported_band *sband = txrc->sband; | |
4b7679a5 JB |
2102 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2103 | struct ieee80211_conf *conf = &priv->hw->conf; | |
b481de9c | 2104 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e6a9854b | 2105 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2106 | struct iwl_lq_sta *lq_sta = priv_sta; |
2107 | int rate_idx; | |
c338ba3c | 2108 | u64 mask_bit = 0; |
b481de9c | 2109 | |
58826351 | 2110 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2111 | |
c338ba3c AM |
2112 | if (sta) |
2113 | mask_bit = sta->supp_rates[sband->band]; | |
2114 | ||
2bc454b0 MW |
2115 | /* Send management frames and broadcast/multicast data using lowest |
2116 | * rate. */ | |
417f114b TW |
2117 | if (!ieee80211_is_data(hdr->frame_control) || |
2118 | is_multicast_ether_addr(hdr->addr1) || !sta || !lq_sta) { | |
c338ba3c AM |
2119 | if (!mask_bit) |
2120 | info->control.rates[0].idx = | |
2121 | rate_lowest_index(sband, NULL); | |
2122 | else | |
2123 | info->control.rates[0].idx = | |
2124 | rate_lowest_index(sband, sta); | |
4b7679a5 | 2125 | return; |
b481de9c ZY |
2126 | } |
2127 | ||
417f114b | 2128 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2129 | |
05c914fe | 2130 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2131 | !lq_sta->ibss_sta_added) { |
947b13a7 | 2132 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
b481de9c ZY |
2133 | |
2134 | if (sta_id == IWL_INVALID_STATION) { | |
e174961c JB |
2135 | IWL_DEBUG_RATE("LQ: ADD station %pM\n", |
2136 | hdr->addr1); | |
4f40e4d9 | 2137 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2138 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2139 | } |
2140 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2141 | lq_sta->lq.sta_id = sta_id; |
2142 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2143 | lq_sta->ibss_sta_added = 1; | |
4b7679a5 | 2144 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c | 2145 | } |
b481de9c ZY |
2146 | } |
2147 | ||
417f114b TW |
2148 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT) |
2149 | rate_idx = rate_lowest_index(sband, sta); | |
2150 | else if (sband->band == IEEE80211_BAND_5GHZ) | |
2151 | rate_idx -= IWL_FIRST_OFDM_RATE; | |
b481de9c | 2152 | |
417f114b | 2153 | info->control.rates[0].idx = rate_idx; |
b481de9c ZY |
2154 | } |
2155 | ||
4b7679a5 JB |
2156 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2157 | gfp_t gfp) | |
b481de9c | 2158 | { |
e227ceac | 2159 | struct iwl_lq_sta *lq_sta; |
bf403db8 | 2160 | struct iwl_priv *priv; |
b481de9c ZY |
2161 | int i, j; |
2162 | ||
bf403db8 | 2163 | priv = (struct iwl_priv *)priv_rate; |
b481de9c ZY |
2164 | IWL_DEBUG_RATE("create station rate scale window\n"); |
2165 | ||
e227ceac | 2166 | lq_sta = kzalloc(sizeof(struct iwl_lq_sta), gfp); |
b481de9c | 2167 | |
c33104f0 | 2168 | if (lq_sta == NULL) |
b481de9c | 2169 | return NULL; |
c33104f0 | 2170 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2171 | |
63fddb9f | 2172 | |
b481de9c ZY |
2173 | for (j = 0; j < LQ_SIZE; j++) |
2174 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2175 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2176 | |
c33104f0 | 2177 | return lq_sta; |
b481de9c ZY |
2178 | } |
2179 | ||
4b7679a5 JB |
2180 | static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, |
2181 | struct ieee80211_sta *sta, void *priv_sta) | |
b481de9c ZY |
2182 | { |
2183 | int i, j; | |
4b7679a5 JB |
2184 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2185 | struct ieee80211_conf *conf = &priv->hw->conf; | |
e227ceac | 2186 | struct iwl_lq_sta *lq_sta = priv_sta; |
d5e49036 | 2187 | u16 mask_bit = 0; |
b481de9c | 2188 | |
c33104f0 | 2189 | lq_sta->flush_timer = 0; |
4b7679a5 | 2190 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2191 | for (j = 0; j < LQ_SIZE; j++) |
2192 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2193 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2194 | |
3110bef7 | 2195 | IWL_DEBUG_RATE("LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2196 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2197 | * the lowest or the highest rate.. Could consider using RSSI from | |
2198 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2199 | * after assoc.. */ | |
2200 | ||
c33104f0 | 2201 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2202 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
4b7679a5 | 2203 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 | 2204 | |
b481de9c | 2205 | /* for IBSS the call are from tasklet */ |
e174961c | 2206 | IWL_DEBUG_RATE("LQ: ADD station %pM\n", sta->addr); |
b481de9c ZY |
2207 | |
2208 | if (sta_id == IWL_INVALID_STATION) { | |
e174961c | 2209 | IWL_DEBUG_RATE("LQ: ADD station %pM\n", sta->addr); |
4b7679a5 | 2210 | sta_id = iwl_add_station_flags(priv, sta->addr, |
67d62035 | 2211 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2212 | } |
2213 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2214 | lq_sta->lq.sta_id = sta_id; |
2215 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2216 | } |
2217 | /* FIXME: this is w/a remove it later */ | |
2218 | priv->assoc_station_added = 1; | |
2219 | } | |
2220 | ||
c33104f0 | 2221 | lq_sta->is_dup = 0; |
c33104f0 | 2222 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2223 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2224 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2225 | lq_sta->band = priv->band; |
77626355 BC |
2226 | /* |
2227 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2228 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2229 | */ | |
ae5eb026 JB |
2230 | lq_sta->active_siso_rate = sta->ht_cap.mcs.rx_mask[0] << 1; |
2231 | lq_sta->active_siso_rate |= sta->ht_cap.mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2232 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2233 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2234 | |
77626355 | 2235 | /* Same here */ |
ae5eb026 JB |
2236 | lq_sta->active_mimo2_rate = sta->ht_cap.mcs.rx_mask[1] << 1; |
2237 | lq_sta->active_mimo2_rate |= sta->ht_cap.mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2238 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2239 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2240 | ||
ae5eb026 JB |
2241 | lq_sta->active_mimo3_rate = sta->ht_cap.mcs.rx_mask[2] << 1; |
2242 | lq_sta->active_mimo3_rate |= sta->ht_cap.mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2243 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2244 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2245 | ||
07bc28ed | 2246 | IWL_DEBUG_RATE("SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2247 | lq_sta->active_siso_rate, |
fde0db31 GC |
2248 | lq_sta->active_mimo2_rate, |
2249 | lq_sta->active_mimo3_rate); | |
2250 | ||
a96a27f9 | 2251 | /* These values will be overridden later */ |
07bc28ed GC |
2252 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; |
2253 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2254 | ||
0c11b4de RR |
2255 | /* as default allow aggregation for all tids */ |
2256 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2257 | lq_sta->drv = priv; |
b481de9c | 2258 | |
d5e49036 MA |
2259 | /* Find highest tx rate supported by hardware and destination station */ |
2260 | mask_bit = sta->supp_rates[sband->band] & lq_sta->active_legacy_rate; | |
2261 | lq_sta->last_txrate_idx = 3; | |
2262 | for (i = 0; i < sband->n_bitrates; i++) | |
2263 | if (mask_bit & BIT(i)) | |
2264 | lq_sta->last_txrate_idx = i; | |
2265 | ||
2266 | /* For MODE_IEEE80211A, skip over cck rates in global rate table */ | |
2267 | if (sband->band == IEEE80211_BAND_5GHZ) | |
2268 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
2269 | ||
4b7679a5 | 2270 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2271 | } |
2272 | ||
fde0db31 | 2273 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 2274 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2275 | { |
e227ceac | 2276 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2277 | int index = 0; |
b481de9c | 2278 | int rate_idx; |
1b696de2 | 2279 | int repeat_rate = 0; |
aade00ce | 2280 | u8 ant_toggle_cnt = 0; |
b481de9c | 2281 | u8 use_ht_possible = 1; |
aade00ce | 2282 | u8 valid_tx_ant = 0; |
07bc28ed | 2283 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2284 | |
77626355 | 2285 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2286 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2287 | |
39e88504 | 2288 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2289 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2290 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2291 | &tbl_type, &rate_idx); |
2292 | ||
77626355 | 2293 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2294 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2295 | ant_toggle_cnt = 1; |
1b696de2 | 2296 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2297 | } else { |
1b696de2 | 2298 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2299 | } |
b481de9c ZY |
2300 | |
2301 | lq_cmd->general_params.mimo_delimiter = | |
2302 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2303 | |
2304 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2305 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2306 | |
07bc28ed GC |
2307 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2308 | lq_cmd->general_params.single_stream_ant_msk = | |
2309 | tbl_type.ant_type; | |
2310 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2311 | lq_cmd->general_params.dual_stream_ant_msk = | |
2312 | tbl_type.ant_type; | |
2313 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2314 | |
2315 | index++; | |
1b696de2 | 2316 | repeat_rate--; |
b481de9c | 2317 | |
aade00ce GC |
2318 | if (priv) |
2319 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2320 | ||
77626355 | 2321 | /* Fill rest of rate table */ |
b481de9c | 2322 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2323 | /* Repeat initial/next rate. |
2324 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2325 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2326 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2327 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2328 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2329 | ant_toggle_cnt++; | |
2330 | else if (priv && | |
2331 | rs_toggle_antenna(valid_tx_ant, | |
2332 | &new_rate, &tbl_type)) | |
2333 | ant_toggle_cnt = 1; | |
2334 | } | |
98d7e09a | 2335 | |
77626355 | 2336 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2337 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2338 | |
2339 | /* Fill next table entry */ | |
b481de9c | 2340 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2341 | cpu_to_le32(new_rate); |
1b696de2 | 2342 | repeat_rate--; |
b481de9c ZY |
2343 | index++; |
2344 | } | |
2345 | ||
39e88504 | 2346 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2347 | &rate_idx); |
2348 | ||
77626355 BC |
2349 | /* Indicate to uCode which entries might be MIMO. |
2350 | * If initial rate was MIMO, this will finally end up | |
2351 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2352 | if (is_mimo(tbl_type.lq_type)) |
2353 | lq_cmd->general_params.mimo_delimiter = index; | |
2354 | ||
77626355 | 2355 | /* Get next rate */ |
39e88504 GC |
2356 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2357 | use_ht_possible); | |
b481de9c | 2358 | |
77626355 | 2359 | /* How many times should we repeat the next rate? */ |
b481de9c | 2360 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2361 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2362 | ant_toggle_cnt++; | |
2363 | else if (priv && | |
2364 | rs_toggle_antenna(valid_tx_ant, | |
2365 | &new_rate, &tbl_type)) | |
2366 | ant_toggle_cnt = 1; | |
2367 | ||
1b696de2 | 2368 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2369 | } else { |
1b696de2 | 2370 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2371 | } |
b481de9c | 2372 | |
77626355 BC |
2373 | /* Don't allow HT rates after next pass. |
2374 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2375 | use_ht_possible = 0; |
2376 | ||
77626355 | 2377 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2378 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2379 | |
2380 | /* Fill next table entry */ | |
39e88504 | 2381 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2382 | |
2383 | index++; | |
1b696de2 | 2384 | repeat_rate--; |
b481de9c ZY |
2385 | } |
2386 | ||
5e1dd8dc | 2387 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2388 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2389 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2390 | } |
2391 | ||
4b7679a5 | 2392 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2393 | { |
4b7679a5 | 2394 | return hw->priv; |
b481de9c ZY |
2395 | } |
2396 | /* rate scale requires free function to be implemented */ | |
2397 | static void rs_free(void *priv_rate) | |
2398 | { | |
2399 | return; | |
2400 | } | |
2401 | ||
4b7679a5 JB |
2402 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2403 | void *priv_sta) | |
b481de9c | 2404 | { |
e227ceac | 2405 | struct iwl_lq_sta *lq_sta = priv_sta; |
45527c2c | 2406 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c ZY |
2407 | |
2408 | IWL_DEBUG_RATE("enter\n"); | |
c33104f0 | 2409 | kfree(lq_sta); |
b481de9c ZY |
2410 | IWL_DEBUG_RATE("leave\n"); |
2411 | } | |
2412 | ||
2413 | ||
93dc646a | 2414 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2415 | static int open_file_generic(struct inode *inode, struct file *file) |
2416 | { | |
2417 | file->private_data = inode->i_private; | |
2418 | return 0; | |
2419 | } | |
e227ceac TW |
2420 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2421 | u32 *rate_n_flags, int index) | |
98d7e09a | 2422 | { |
bf403db8 EK |
2423 | struct iwl_priv *priv; |
2424 | ||
2425 | priv = lq_sta->drv; | |
39e88504 GC |
2426 | if (lq_sta->dbg_fixed_rate) { |
2427 | if (index < 12) { | |
2428 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2429 | } else { | |
2430 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2431 | *rate_n_flags = 0x800D; | |
2432 | else | |
2433 | *rate_n_flags = 0x820A; | |
2434 | } | |
98d7e09a | 2435 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2436 | } else { |
2437 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2438 | } |
98d7e09a | 2439 | } |
5ae212c9 | 2440 | |
98d7e09a ZY |
2441 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2442 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2443 | { | |
e227ceac | 2444 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2445 | struct iwl_priv *priv; |
98d7e09a ZY |
2446 | char buf[64]; |
2447 | int buf_size; | |
2448 | u32 parsed_rate; | |
2449 | ||
bf403db8 | 2450 | priv = lq_sta->drv; |
98d7e09a ZY |
2451 | memset(buf, 0, sizeof(buf)); |
2452 | buf_size = min(count, sizeof(buf) - 1); | |
2453 | if (copy_from_user(buf, user_buf, buf_size)) | |
2454 | return -EFAULT; | |
2455 | ||
2456 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2457 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2458 | else |
39e88504 | 2459 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2460 | |
39e88504 GC |
2461 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2462 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2463 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2464 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2465 | |
2466 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2467 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2468 | |
39e88504 | 2469 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2470 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2471 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2472 | } |
2473 | ||
2474 | return count; | |
2475 | } | |
0209dc11 | 2476 | |
5ae212c9 ZY |
2477 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2478 | char __user *user_buf, size_t count, loff_t *ppos) | |
2479 | { | |
2480 | char buff[1024]; | |
2481 | int desc = 0; | |
2482 | int i = 0; | |
2483 | ||
e227ceac | 2484 | struct iwl_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2485 | |
c33104f0 | 2486 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2487 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2488 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2489 | lq_sta->active_legacy_rate); |
98d7e09a | 2490 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2491 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2492 | desc += sprintf(buff+desc, "general:" |
2493 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2494 | lq_sta->lq.general_params.flags, |
2495 | lq_sta->lq.general_params.mimo_delimiter, | |
2496 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2497 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2498 | |
2499 | desc += sprintf(buff+desc, "agg:" | |
2500 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2501 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2502 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2503 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2504 | |
2505 | desc += sprintf(buff+desc, | |
2506 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2507 | lq_sta->lq.general_params.start_rate_index[0], |
2508 | lq_sta->lq.general_params.start_rate_index[1], | |
2509 | lq_sta->lq.general_params.start_rate_index[2], | |
2510 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2511 | |
2512 | ||
2513 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2514 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2515 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2516 | |
2517 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2518 | } | |
2519 | ||
2520 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2521 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2522 | .read = rs_sta_dbgfs_scale_table_read, |
2523 | .open = open_file_generic, | |
2524 | }; | |
0209dc11 ZY |
2525 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2526 | char __user *user_buf, size_t count, loff_t *ppos) | |
2527 | { | |
2528 | char buff[1024]; | |
2529 | int desc = 0; | |
2530 | int i, j; | |
2531 | ||
e227ceac | 2532 | struct iwl_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2533 | for (i = 0; i < LQ_SIZE; i++) { |
2534 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2535 | "rate=0x%X\n", | |
c3056065 | 2536 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
2537 | lq_sta->lq_info[i].lq_type, |
2538 | lq_sta->lq_info[i].is_SGI, | |
2539 | lq_sta->lq_info[i].is_fat, | |
2540 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2541 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2542 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2543 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2544 | "counter=%d success=%d %%=%d\n", |
2545 | lq_sta->lq_info[i].win[j].counter, | |
2546 | lq_sta->lq_info[i].win[j].success_counter, | |
2547 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2548 | } |
2549 | } | |
2550 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2551 | } | |
2552 | ||
2553 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2554 | .read = rs_sta_dbgfs_stats_table_read, | |
2555 | .open = open_file_generic, | |
2556 | }; | |
5ae212c9 | 2557 | |
93dc646a ZY |
2558 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2559 | struct dentry *dir) | |
2560 | { | |
e227ceac | 2561 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2562 | lq_sta->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 2563 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2564 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2565 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2566 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2567 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2568 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2569 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2570 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2571 | |
93dc646a ZY |
2572 | } |
2573 | ||
2574 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2575 | { | |
e227ceac | 2576 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2577 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2578 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2579 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2580 | } |
2581 | #endif | |
2582 | ||
b481de9c ZY |
2583 | static struct rate_control_ops rs_ops = { |
2584 | .module = NULL, | |
2585 | .name = RS_NAME, | |
2586 | .tx_status = rs_tx_status, | |
2587 | .get_rate = rs_get_rate, | |
2588 | .rate_init = rs_rate_init, | |
b481de9c ZY |
2589 | .alloc = rs_alloc, |
2590 | .free = rs_free, | |
2591 | .alloc_sta = rs_alloc_sta, | |
2592 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2593 | #ifdef CONFIG_MAC80211_DEBUGFS |
2594 | .add_sta_debugfs = rs_add_debugfs, | |
2595 | .remove_sta_debugfs = rs_remove_debugfs, | |
2596 | #endif | |
b481de9c ZY |
2597 | }; |
2598 | ||
e227ceac | 2599 | int iwlagn_rate_control_register(void) |
b481de9c | 2600 | { |
897e1cf2 | 2601 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2602 | } |
2603 | ||
e227ceac | 2604 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
2605 | { |
2606 | ieee80211_rate_control_unregister(&rs_ops); | |
2607 | } | |
2608 |