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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
eb7ae89c | 3 | * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved. |
b481de9c ZY |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * James P. Ketrenos <ipw2100-admin@linux.intel.com> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/wireless.h> | |
30 | #include <net/mac80211.h> | |
b481de9c ZY |
31 | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
2c8dccc7 | 38 | #include "../net/mac80211/rate.h" |
b481de9c | 39 | |
3e0d4cb1 | 40 | #include "iwl-dev.h" |
be1f3ab6 | 41 | #include "iwl-sta.h" |
857485c0 | 42 | #include "iwl-core.h" |
b481de9c ZY |
43 | #include "iwl-helpers.h" |
44 | ||
e227ceac | 45 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 46 | |
aade00ce | 47 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
48 | #define IWL_NUMBER_TRY 1 |
49 | #define IWL_HT_NUMBER_TRY 3 | |
50 | ||
77626355 BC |
51 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
52 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
53 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
54 | ||
55 | /* max time to accum history 2 seconds */ | |
56 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) | |
b481de9c ZY |
57 | |
58 | static u8 rs_ht_to_legacy[] = { | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, | |
62 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
63 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
64 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
65 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
66 | }; | |
67 | ||
aade00ce GC |
68 | static const u8 ant_toggle_lookup[] = { |
69 | /*ANT_NONE -> */ ANT_NONE, | |
70 | /*ANT_A -> */ ANT_B, | |
71 | /*ANT_B -> */ ANT_C, | |
72 | /*ANT_AB -> */ ANT_BC, | |
73 | /*ANT_C -> */ ANT_A, | |
74 | /*ANT_AC -> */ ANT_AB, | |
75 | /*ANT_BC -> */ ANT_AC, | |
76 | /*ANT_ABC -> */ ANT_ABC, | |
77 | }; | |
78 | ||
77626355 | 79 | /** |
e227ceac | 80 | * struct iwl_rate_scale_data -- tx success history for one rate |
77626355 | 81 | */ |
e227ceac | 82 | struct iwl_rate_scale_data { |
77626355 BC |
83 | u64 data; /* bitmap of successful frames */ |
84 | s32 success_counter; /* number of frames successful */ | |
85 | s32 success_ratio; /* per-cent * 128 */ | |
86 | s32 counter; /* number of frames attempted */ | |
87 | s32 average_tpt; /* success ratio * expected throughput */ | |
b481de9c ZY |
88 | unsigned long stamp; |
89 | }; | |
90 | ||
77626355 | 91 | /** |
e227ceac | 92 | * struct iwl_scale_tbl_info -- tx params and success history for all rates |
77626355 | 93 | * |
e227ceac | 94 | * There are two of these in struct iwl_lq_sta, |
77626355 BC |
95 | * one for "active", and one for "search". |
96 | */ | |
e227ceac | 97 | struct iwl_scale_tbl_info { |
fde0db31 GC |
98 | enum iwl_table_type lq_type; |
99 | u8 ant_type; | |
77626355 BC |
100 | u8 is_SGI; /* 1 = short guard interval */ |
101 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
102 | u8 is_dup; /* 1 = duplicated data streams */ | |
103 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
104 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
39e88504 | 105 | u32 current_rate; /* rate_n_flags, uCode API format */ |
e227ceac | 106 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
107 | }; |
108 | ||
e227ceac | 109 | struct iwl_traffic_load { |
0c11b4de RR |
110 | unsigned long time_stamp; /* age of the oldest statistics */ |
111 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
112 | * slice */ | |
113 | u32 total; /* total num of packets during the | |
114 | * last TID_MAX_TIME_DIFF */ | |
115 | u8 queue_count; /* number of queues that has | |
116 | * been used since the last cleanup */ | |
117 | u8 head; /* start of the circular buffer */ | |
118 | }; | |
119 | ||
77626355 | 120 | /** |
e227ceac | 121 | * struct iwl_lq_sta -- driver's rate scaling private structure |
77626355 BC |
122 | * |
123 | * Pointer to this gets passed back and forth between driver and mac80211. | |
124 | */ | |
e227ceac | 125 | struct iwl_lq_sta { |
77626355 BC |
126 | u8 active_tbl; /* index of active table, range 0-1 */ |
127 | u8 enable_counter; /* indicates HT mode */ | |
128 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
129 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 130 | s32 last_tpt; |
77626355 BC |
131 | |
132 | /* The following determine when to search for a new mode */ | |
b481de9c | 133 | u32 table_count_limit; |
77626355 BC |
134 | u32 max_failure_limit; /* # failed frames before new search */ |
135 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 136 | u32 table_count; |
77626355 BC |
137 | u32 total_failed; /* total failed frames, any/all rates */ |
138 | u32 total_success; /* total successful frames, any/all rates */ | |
139 | u32 flush_timer; /* time staying in mode before new search */ | |
140 | ||
141 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
142 | u8 is_green; |
143 | u8 is_dup; | |
8318d78a | 144 | enum ieee80211_band band; |
b481de9c | 145 | u8 ibss_sta_added; |
77626355 BC |
146 | |
147 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 148 | u32 supp_rates; |
39e88504 | 149 | u16 active_legacy_rate; |
b481de9c | 150 | u16 active_siso_rate; |
fde0db31 GC |
151 | u16 active_mimo2_rate; |
152 | u16 active_mimo3_rate; | |
b481de9c | 153 | u16 active_rate_basic; |
77626355 | 154 | |
66c73db7 | 155 | struct iwl_link_quality_cmd lq; |
e227ceac TW |
156 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
157 | struct iwl_traffic_load load[TID_MAX_LOAD_COUNT]; | |
0c11b4de | 158 | u8 tx_agg_tid_en; |
5ae212c9 | 159 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 160 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 161 | struct dentry *rs_sta_dbgfs_stats_table_file; |
0c11b4de | 162 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; |
39e88504 | 163 | u32 dbg_fixed_rate; |
5ae212c9 | 164 | #endif |
6243065d | 165 | struct iwl_priv *drv; |
b481de9c ZY |
166 | }; |
167 | ||
c79dd5b5 | 168 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
169 | struct net_device *dev, |
170 | struct ieee80211_hdr *hdr, | |
171 | struct sta_info *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 | */ | |
fde0db31 | 190 | /*FIXME:RS:need to spearate tables for MIMO2/MIMO3*/ |
b481de9c ZY |
191 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
192 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
193 | }; | |
194 | ||
195 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
196 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
197 | }; | |
198 | ||
199 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
200 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
201 | }; | |
202 | ||
203 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
204 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
205 | }; | |
206 | ||
207 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
208 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
209 | }; | |
210 | ||
211 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
212 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
213 | }; | |
214 | ||
215 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
216 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
217 | }; | |
218 | ||
219 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
220 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
221 | }; | |
222 | ||
223 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
224 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
225 | }; | |
226 | ||
227 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
228 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
229 | }; | |
230 | ||
39e88504 | 231 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
232 | { |
233 | return (u8)(rate_n_flags & 0xFF); | |
234 | } | |
235 | ||
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; |
fd7c8a40 | 283 | __le16 fc = hdr->frame_control; |
54dbb525 | 284 | u8 tid; |
0c11b4de | 285 | |
fd7c8a40 HH |
286 | if (ieee80211_is_data_qos(fc)) { |
287 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
54dbb525 TW |
288 | tid = qc[0] & 0xf; |
289 | } else | |
faa29718 | 290 | return MAX_TID_COUNT; |
0c11b4de RR |
291 | |
292 | tl = &lq_data->load[tid]; | |
293 | ||
294 | curr_time -= curr_time % TID_ROUND_VALUE; | |
295 | ||
296 | /* Happens only for the first packet. Initialize the data */ | |
297 | if (!(tl->queue_count)) { | |
298 | tl->total = 1; | |
299 | tl->time_stamp = curr_time; | |
300 | tl->queue_count = 1; | |
301 | tl->head = 0; | |
302 | tl->packet_count[0] = 1; | |
faa29718 | 303 | return MAX_TID_COUNT; |
0c11b4de RR |
304 | } |
305 | ||
306 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
307 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
308 | ||
309 | /* The history is too long: remove data that is older than */ | |
310 | /* TID_MAX_TIME_DIFF */ | |
311 | if (index >= TID_QUEUE_MAX_SIZE) | |
312 | rs_tl_rm_old_stats(tl, curr_time); | |
313 | ||
314 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
315 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
316 | tl->total = tl->total + 1; | |
317 | ||
318 | if ((index + 1) > tl->queue_count) | |
319 | tl->queue_count = index + 1; | |
faa29718 RR |
320 | |
321 | return tid; | |
0c11b4de RR |
322 | } |
323 | ||
324 | /* | |
325 | get the traffic load value for tid | |
326 | */ | |
e227ceac | 327 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
328 | { |
329 | u32 curr_time = jiffies_to_msecs(jiffies); | |
330 | u32 time_diff; | |
331 | s32 index; | |
e227ceac | 332 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
333 | |
334 | if (tid >= TID_MAX_LOAD_COUNT) | |
335 | return 0; | |
336 | ||
337 | tl = &(lq_data->load[tid]); | |
338 | ||
339 | curr_time -= curr_time % TID_ROUND_VALUE; | |
340 | ||
341 | if (!(tl->queue_count)) | |
342 | return 0; | |
343 | ||
344 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
345 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
346 | ||
347 | /* The history is too long: remove data that is older than */ | |
348 | /* TID_MAX_TIME_DIFF */ | |
349 | if (index >= TID_QUEUE_MAX_SIZE) | |
350 | rs_tl_rm_old_stats(tl, curr_time); | |
351 | ||
352 | return tl->total; | |
353 | } | |
354 | ||
c79dd5b5 | 355 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac TW |
356 | struct iwl_lq_sta *lq_data, u8 tid, |
357 | struct sta_info *sta) | |
0c11b4de RR |
358 | { |
359 | unsigned long state; | |
360 | DECLARE_MAC_BUF(mac); | |
361 | ||
07346f81 | 362 | spin_lock_bh(&sta->lock); |
cee24a3e | 363 | state = sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 364 | spin_unlock_bh(&sta->lock); |
0c11b4de RR |
365 | |
366 | if (state == HT_AGG_STATE_IDLE && | |
367 | rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { | |
368 | IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n", | |
17741cdc JB |
369 | print_mac(mac, sta->sta.addr), tid); |
370 | ieee80211_start_tx_ba_session(priv->hw, sta->sta.addr, tid); | |
0c11b4de RR |
371 | } |
372 | } | |
373 | ||
c79dd5b5 | 374 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac TW |
375 | struct iwl_lq_sta *lq_data, |
376 | struct sta_info *sta) | |
0c11b4de RR |
377 | { |
378 | if ((tid < TID_MAX_LOAD_COUNT)) | |
379 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
380 | else if (tid == IWL_AGG_ALL_TID) | |
381 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
382 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
383 | } | |
384 | ||
39e88504 | 385 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 386 | { |
3ac7f146 TW |
387 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
388 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
389 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
390 | } |
391 | ||
77626355 BC |
392 | /** |
393 | * rs_collect_tx_data - Update the success/failure sliding window | |
394 | * | |
395 | * We keep a sliding window of the last 62 packets transmitted | |
396 | * at this rate. window->data contains the bitmask of successful | |
397 | * packets. | |
398 | */ | |
e227ceac | 399 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
99556438 RR |
400 | int scale_index, s32 tpt, int retries, |
401 | int successes) | |
b481de9c | 402 | { |
e227ceac | 403 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 404 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
405 | s32 fail_count; |
406 | ||
dc2453ae TW |
407 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
408 | return -EINVAL; | |
b481de9c | 409 | |
77626355 | 410 | /* Select data for current tx bit rate */ |
b481de9c ZY |
411 | window = &(windows[scale_index]); |
412 | ||
77626355 BC |
413 | /* |
414 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
415 | * history window; anything older isn't really relevant any more. | |
416 | * If we have filled up the sliding window, drop the oldest attempt; | |
417 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
418 | * subtract "1" from the success counter (this is the main reason | |
419 | * we keep these bitmaps!). | |
420 | */ | |
99556438 | 421 | while (retries > 0) { |
39e88504 GC |
422 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
423 | ||
424 | /* remove earliest */ | |
425 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
426 | ||
99556438 RR |
427 | if (window->data & mask) { |
428 | window->data &= ~mask; | |
39e88504 | 429 | window->success_counter--; |
99556438 | 430 | } |
b481de9c | 431 | } |
b481de9c | 432 | |
99556438 RR |
433 | /* Increment frames-attempted counter */ |
434 | window->counter++; | |
435 | ||
436 | /* Shift bitmap by one frame (throw away oldest history), | |
437 | * OR in "1", and increment "success" if this | |
438 | * frame was successful. */ | |
90d7795e | 439 | window->data <<= 1; |
99556438 | 440 | if (successes > 0) { |
39e88504 | 441 | window->success_counter++; |
99556438 RR |
442 | window->data |= 0x1; |
443 | successes--; | |
444 | } | |
77626355 | 445 | |
99556438 | 446 | retries--; |
b481de9c ZY |
447 | } |
448 | ||
77626355 | 449 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
450 | if (window->counter > 0) |
451 | window->success_ratio = 128 * (100 * window->success_counter) | |
452 | / window->counter; | |
453 | else | |
454 | window->success_ratio = IWL_INVALID_VALUE; | |
455 | ||
456 | fail_count = window->counter - window->success_counter; | |
457 | ||
77626355 | 458 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
459 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
460 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
461 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
462 | else | |
463 | window->average_tpt = IWL_INVALID_VALUE; | |
464 | ||
77626355 | 465 | /* Tag this window as having been updated */ |
b481de9c ZY |
466 | window->stamp = jiffies; |
467 | ||
dc2453ae | 468 | return 0; |
b481de9c ZY |
469 | } |
470 | ||
77626355 BC |
471 | /* |
472 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
473 | */ | |
39e88504 | 474 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
e227ceac | 475 | static u32 rate_n_flags_from_tbl(struct iwl_scale_tbl_info *tbl, |
39e88504 | 476 | int index, u8 use_green) |
b481de9c | 477 | { |
39e88504 GC |
478 | u32 rate_n_flags = 0; |
479 | ||
b481de9c | 480 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 481 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 482 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 483 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 484 | |
fde0db31 GC |
485 | } else if (is_Ht(tbl->lq_type)) { |
486 | if (index > IWL_LAST_OFDM_RATE) { | |
487 | IWL_ERROR("invalid HT rate index %d\n", index); | |
b481de9c | 488 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 489 | } |
39e88504 | 490 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
491 | |
492 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 493 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 494 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 495 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 496 | else |
1826dcc0 | 497 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 498 | } else { |
fde0db31 | 499 | IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
500 | } |
501 | ||
39e88504 | 502 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 503 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 504 | |
39e88504 GC |
505 | if (is_Ht(tbl->lq_type)) { |
506 | if (tbl->is_fat) { | |
507 | if (tbl->is_dup) | |
508 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
509 | else | |
510 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
511 | } | |
512 | if (tbl->is_SGI) | |
513 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
514 | ||
515 | if (use_green) { | |
516 | rate_n_flags |= RATE_MCS_GF_MSK; | |
517 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
518 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
519 | IWL_ERROR("GF was set with SGI:SISO\n"); | |
520 | } | |
521 | } | |
b481de9c | 522 | } |
39e88504 | 523 | return rate_n_flags; |
b481de9c ZY |
524 | } |
525 | ||
77626355 BC |
526 | /* |
527 | * Interpret uCode API's rate_n_flags format, | |
528 | * fill "search" or "active" tx mode table. | |
529 | */ | |
39e88504 | 530 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 531 | enum ieee80211_band band, |
e227ceac | 532 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
533 | int *rate_idx) |
534 | { | |
39e88504 GC |
535 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
536 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
537 | u8 mcs; | |
b481de9c | 538 | |
e7d326ac | 539 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 540 | |
fde0db31 | 541 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 542 | *rate_idx = -1; |
dc2453ae | 543 | return -EINVAL; |
b481de9c | 544 | } |
77626355 | 545 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
546 | tbl->is_fat = 0; |
547 | tbl->is_dup = 0; | |
fde0db31 GC |
548 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
549 | tbl->lq_type = LQ_NONE; | |
b481de9c | 550 | |
77626355 | 551 | /* legacy rate format */ |
39e88504 | 552 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 553 | if (num_of_ant == 1) { |
8318d78a | 554 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
555 | tbl->lq_type = LQ_A; |
556 | else | |
557 | tbl->lq_type = LQ_G; | |
b481de9c | 558 | } |
fde0db31 | 559 | /* HT rate format */ |
b481de9c | 560 | } else { |
39e88504 | 561 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
562 | tbl->is_SGI = 1; |
563 | ||
39e88504 GC |
564 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
565 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
566 | tbl->is_fat = 1; |
567 | ||
39e88504 | 568 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 569 | tbl->is_dup = 1; |
fde0db31 | 570 | |
39e88504 | 571 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 572 | |
39e88504 GC |
573 | /* SISO */ |
574 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
575 | if (num_of_ant == 1) |
576 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
577 | /* MIMO2 */ | |
39e88504 | 578 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
579 | if (num_of_ant == 2) |
580 | tbl->lq_type = LQ_MIMO2; | |
581 | /* MIMO3 */ | |
582 | } else { | |
583 | if (num_of_ant == 3) | |
584 | tbl->lq_type = LQ_MIMO3; | |
585 | } | |
b481de9c ZY |
586 | } |
587 | return 0; | |
588 | } | |
aade00ce GC |
589 | |
590 | /* switch to another antenna/antennas and return 1 */ | |
591 | /* if no other valid antenna found, return 0 */ | |
592 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 593 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 594 | { |
aade00ce GC |
595 | u8 new_ant_type; |
596 | ||
597 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
598 | return 0; | |
599 | ||
600 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
601 | return 0; | |
602 | ||
603 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
604 | ||
605 | while ((new_ant_type != tbl->ant_type) && | |
606 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
607 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
608 | ||
609 | if (new_ant_type == tbl->ant_type) | |
610 | return 0; | |
611 | ||
612 | tbl->ant_type = new_ant_type; | |
613 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
614 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
615 | return 1; | |
b481de9c ZY |
616 | } |
617 | ||
39e88504 | 618 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 619 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
620 | #if 0 |
621 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 622 | { |
3ac7f146 | 623 | return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
270243a5 | 624 | priv->current_ht_config.is_green_field && |
3ac7f146 | 625 | !priv->current_ht_config.non_GF_STA_present; |
f935a6da | 626 | } |
4f85f5b3 | 627 | #endif |
f935a6da GC |
628 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
629 | { | |
dc2453ae | 630 | return 0; |
b481de9c ZY |
631 | } |
632 | ||
633 | /** | |
634 | * rs_get_supported_rates - get the available rates | |
635 | * | |
636 | * if management frame or broadcast frame only return | |
637 | * basic available rates. | |
638 | * | |
639 | */ | |
e227ceac TW |
640 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
641 | struct ieee80211_hdr *hdr, | |
642 | enum iwl_table_type rate_type) | |
b481de9c | 643 | { |
eecd6e57 GC |
644 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
645 | lq_sta->active_rate_basic) | |
646 | return lq_sta->active_rate_basic; | |
647 | ||
648 | if (is_legacy(rate_type)) { | |
649 | return lq_sta->active_legacy_rate; | |
650 | } else { | |
b481de9c | 651 | if (is_siso(rate_type)) |
eecd6e57 | 652 | return lq_sta->active_siso_rate; |
fde0db31 | 653 | else if (is_mimo2(rate_type)) |
eecd6e57 | 654 | return lq_sta->active_mimo2_rate; |
b481de9c | 655 | else |
eecd6e57 | 656 | return lq_sta->active_mimo3_rate; |
c33104f0 | 657 | } |
b481de9c ZY |
658 | } |
659 | ||
bf403db8 EK |
660 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
661 | int rate_type) | |
b481de9c ZY |
662 | { |
663 | u8 high = IWL_RATE_INVALID; | |
664 | u8 low = IWL_RATE_INVALID; | |
665 | ||
01ebd063 | 666 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
667 | * the rate table */ |
668 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
669 | int i; | |
670 | u32 mask; | |
671 | ||
672 | /* Find the previous rate that is in the rate mask */ | |
673 | i = index - 1; | |
674 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
675 | if (rate_mask & mask) { | |
676 | low = i; | |
677 | break; | |
678 | } | |
679 | } | |
680 | ||
681 | /* Find the next rate that is in the rate mask */ | |
682 | i = index + 1; | |
683 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
684 | if (rate_mask & mask) { | |
685 | high = i; | |
686 | break; | |
687 | } | |
688 | } | |
689 | ||
690 | return (high << 8) | low; | |
691 | } | |
692 | ||
693 | low = index; | |
694 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 695 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
696 | if (low == IWL_RATE_INVALID) |
697 | break; | |
698 | if (rate_mask & (1 << low)) | |
699 | break; | |
700 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
701 | } | |
702 | ||
703 | high = index; | |
704 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 705 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
706 | if (high == IWL_RATE_INVALID) |
707 | break; | |
708 | if (rate_mask & (1 << high)) | |
709 | break; | |
710 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
711 | } | |
712 | ||
713 | return (high << 8) | low; | |
714 | } | |
715 | ||
e227ceac TW |
716 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
717 | struct iwl_scale_tbl_info *tbl, | |
718 | u8 scale_index, u8 ht_possible) | |
b481de9c | 719 | { |
b481de9c ZY |
720 | s32 low; |
721 | u16 rate_mask; | |
722 | u16 high_low; | |
723 | u8 switch_to_legacy = 0; | |
c33104f0 | 724 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
725 | |
726 | /* check if we need to switch from HT to legacy rates. | |
727 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
728 | * are always supported (spec demand) */ | |
729 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
730 | switch_to_legacy = 1; | |
731 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 732 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
733 | tbl->lq_type = LQ_A; |
734 | else | |
735 | tbl->lq_type = LQ_G; | |
736 | ||
69fdb309 | 737 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 738 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
739 | |
740 | tbl->is_fat = 0; | |
741 | tbl->is_SGI = 0; | |
742 | } | |
743 | ||
eecd6e57 | 744 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 745 | |
77626355 | 746 | /* Mask with station rate restriction */ |
b481de9c | 747 | if (is_legacy(tbl->lq_type)) { |
77626355 | 748 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 749 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 750 | rate_mask = (u16)(rate_mask & |
c33104f0 | 751 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 752 | else |
c33104f0 | 753 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
754 | } |
755 | ||
77626355 | 756 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 757 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
758 | low = scale_index; |
759 | goto out; | |
b481de9c ZY |
760 | } |
761 | ||
bf403db8 EK |
762 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
763 | tbl->lq_type); | |
b481de9c ZY |
764 | low = high_low & 0xff; |
765 | ||
39e88504 GC |
766 | if (low == IWL_RATE_INVALID) |
767 | low = scale_index; | |
768 | ||
769 | out: | |
770 | return rate_n_flags_from_tbl(tbl, low, is_green); | |
b481de9c ZY |
771 | } |
772 | ||
77626355 BC |
773 | /* |
774 | * mac80211 sends us Tx status | |
775 | */ | |
c33104f0 | 776 | static void rs_tx_status(void *priv_rate, struct net_device *dev, |
e039fa4a | 777 | struct sk_buff *skb) |
b481de9c ZY |
778 | { |
779 | int status; | |
780 | u8 retries; | |
781 | int rs_index, index = 0; | |
e227ceac | 782 | struct iwl_lq_sta *lq_sta; |
66c73db7 | 783 | struct iwl_link_quality_cmd *table; |
b481de9c ZY |
784 | struct sta_info *sta; |
785 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
c79dd5b5 | 786 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
b481de9c | 787 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
4c424e4c | 788 | struct ieee80211_hw *hw = local_to_hw(local); |
e039fa4a | 789 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac TW |
790 | struct iwl_rate_scale_data *window = NULL; |
791 | struct iwl_rate_scale_data *search_win = NULL; | |
39e88504 | 792 | u32 tx_rate; |
e227ceac TW |
793 | struct iwl_scale_tbl_info tbl_type; |
794 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c | 795 | u8 active_index = 0; |
fd7c8a40 | 796 | __le16 fc = hdr->frame_control; |
b481de9c ZY |
797 | s32 tpt = 0; |
798 | ||
58826351 | 799 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
800 | |
801 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
802 | return; | |
803 | ||
99556438 | 804 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
805 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
806 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
807 | return; |
808 | ||
e039fa4a | 809 | retries = info->status.retry_count; |
b481de9c ZY |
810 | |
811 | if (retries > 15) | |
812 | retries = 15; | |
813 | ||
d0709a65 | 814 | rcu_read_lock(); |
b481de9c ZY |
815 | |
816 | sta = sta_info_get(local, hdr->addr1); | |
817 | ||
f4d6082d TW |
818 | if (!sta || !sta->rate_ctrl_priv) |
819 | goto out; | |
820 | ||
b481de9c | 821 | |
e227ceac | 822 | lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv; |
b481de9c | 823 | |
05c914fe | 824 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 825 | !lq_sta->ibss_sta_added) |
f4d6082d | 826 | goto out; |
b481de9c | 827 | |
c33104f0 TW |
828 | table = &lq_sta->lq; |
829 | active_index = lq_sta->active_tbl; | |
b481de9c | 830 | |
c33104f0 TW |
831 | curr_tbl = &(lq_sta->lq_info[active_index]); |
832 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
e227ceac TW |
833 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
834 | search_win = (struct iwl_rate_scale_data *)&(search_tbl->win[0]); | |
b481de9c | 835 | |
77626355 BC |
836 | /* |
837 | * Ignore this Tx frame response if its initial rate doesn't match | |
838 | * that of latest Link Quality command. There may be stragglers | |
839 | * from a previous Link Quality command, but we're no longer interested | |
840 | * in those; they're either from the "active" mode while we're trying | |
841 | * to check "search" mode, or a prior "search" mode after we've moved | |
842 | * to a new "search" mode (which might become the new "active" mode). | |
843 | */ | |
39e88504 GC |
844 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
845 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
846 | if (priv->band == IEEE80211_BAND_5GHZ) |
847 | rs_index -= IWL_FIRST_OFDM_RATE; | |
848 | ||
e039fa4a | 849 | if ((info->tx_rate_idx < 0) || |
4c424e4c | 850 | (tbl_type.is_SGI ^ |
e039fa4a | 851 | !!(info->flags & IEEE80211_TX_CTL_SHORT_GI)) || |
4c424e4c | 852 | (tbl_type.is_fat ^ |
e039fa4a | 853 | !!(info->flags & IEEE80211_TX_CTL_40_MHZ_WIDTH)) || |
4c424e4c | 854 | (tbl_type.is_dup ^ |
e039fa4a JB |
855 | !!(info->flags & IEEE80211_TX_CTL_DUP_DATA)) || |
856 | (tbl_type.ant_type ^ info->antenna_sel_tx) || | |
39e88504 | 857 | (!!(tx_rate & RATE_MCS_HT_MSK) ^ |
e039fa4a | 858 | !!(info->flags & IEEE80211_TX_CTL_OFDM_HT)) || |
39e88504 | 859 | (!!(tx_rate & RATE_MCS_GF_MSK) ^ |
e039fa4a | 860 | !!(info->flags & IEEE80211_TX_CTL_GREEN_FIELD)) || |
4c424e4c | 861 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e039fa4a | 862 | hw->wiphy->bands[info->band]->bitrates[info->tx_rate_idx].bitrate)) { |
39e88504 | 863 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
f4d6082d | 864 | goto out; |
b481de9c ZY |
865 | } |
866 | ||
77626355 | 867 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 868 | while (retries) { |
77626355 BC |
869 | /* Look up the rate and other info used for each tx attempt. |
870 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
871 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
872 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
873 | &tbl_type, &rs_index); |
874 | ||
77626355 BC |
875 | /* If type matches "search" table, |
876 | * add failure to "search" history */ | |
b481de9c | 877 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 878 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
879 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
880 | if (search_tbl->expected_tpt) | |
881 | tpt = search_tbl->expected_tpt[rs_index]; | |
882 | else | |
883 | tpt = 0; | |
99556438 | 884 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
885 | |
886 | /* Else if type matches "current/active" table, | |
887 | * add failure to "current/active" history */ | |
b481de9c | 888 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 889 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
890 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
891 | if (curr_tbl->expected_tpt) | |
892 | tpt = curr_tbl->expected_tpt[rs_index]; | |
893 | else | |
894 | tpt = 0; | |
99556438 | 895 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 896 | } |
77626355 BC |
897 | |
898 | /* If not searching for a new mode, increment failed counter | |
899 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
900 | if (lq_sta->stay_in_tbl) |
901 | lq_sta->total_failed++; | |
b481de9c ZY |
902 | --retries; |
903 | index++; | |
904 | ||
905 | } | |
906 | ||
77626355 BC |
907 | /* |
908 | * Find (by rate) the history window to update with final Tx attempt; | |
909 | * if Tx was successful first try, use original rate, | |
910 | * else look up the rate that was, finally, successful. | |
911 | */ | |
39e88504 GC |
912 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
913 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 914 | |
77626355 | 915 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 916 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 917 | |
77626355 BC |
918 | /* If type matches "search" table, |
919 | * add final tx status to "search" history */ | |
b481de9c | 920 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 921 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
922 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
923 | if (search_tbl->expected_tpt) | |
924 | tpt = search_tbl->expected_tpt[rs_index]; | |
925 | else | |
926 | tpt = 0; | |
e039fa4a | 927 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 928 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
929 | info->status.ampdu_ack_len, |
930 | info->status.ampdu_ack_map); | |
99556438 RR |
931 | else |
932 | rs_collect_tx_data(search_win, rs_index, tpt, | |
933 | 1, status); | |
77626355 BC |
934 | /* Else if type matches "current/active" table, |
935 | * add final tx status to "current/active" history */ | |
b481de9c | 936 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 937 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
938 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
939 | if (curr_tbl->expected_tpt) | |
940 | tpt = curr_tbl->expected_tpt[rs_index]; | |
941 | else | |
942 | tpt = 0; | |
e039fa4a | 943 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 944 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
945 | info->status.ampdu_ack_len, |
946 | info->status.ampdu_ack_map); | |
99556438 RR |
947 | else |
948 | rs_collect_tx_data(window, rs_index, tpt, | |
949 | 1, status); | |
b481de9c ZY |
950 | } |
951 | ||
77626355 BC |
952 | /* If not searching for new mode, increment success/failed counter |
953 | * ... these help determine when to start searching again */ | |
c33104f0 | 954 | if (lq_sta->stay_in_tbl) { |
e039fa4a JB |
955 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
956 | lq_sta->total_success += info->status.ampdu_ack_map; | |
99556438 | 957 | lq_sta->total_failed += |
e039fa4a | 958 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
959 | } else { |
960 | if (status) | |
961 | lq_sta->total_success++; | |
962 | else | |
963 | lq_sta->total_failed++; | |
964 | } | |
b481de9c ZY |
965 | } |
966 | ||
77626355 | 967 | /* See if there's a better rate or modulation mode to try. */ |
b481de9c | 968 | rs_rate_scale_perform(priv, dev, hdr, sta); |
f4d6082d | 969 | out: |
d0709a65 | 970 | rcu_read_unlock(); |
b481de9c ZY |
971 | return; |
972 | } | |
973 | ||
77626355 BC |
974 | /* |
975 | * Begin a period of staying with a selected modulation mode. | |
976 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
977 | * Set frame tx success limits according to legacy vs. high-throughput, | |
978 | * and reset overall (spanning all rates) tx success history statistics. | |
979 | * These control how long we stay using same modulation mode before | |
980 | * searching for a new mode. | |
981 | */ | |
bf403db8 | 982 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 983 | struct iwl_lq_sta *lq_sta) |
b481de9c | 984 | { |
eecd6e57 | 985 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 986 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 987 | if (is_legacy) { |
c33104f0 TW |
988 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
989 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
990 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 991 | } else { |
c33104f0 TW |
992 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
993 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
994 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 995 | } |
c33104f0 TW |
996 | lq_sta->table_count = 0; |
997 | lq_sta->total_failed = 0; | |
998 | lq_sta->total_success = 0; | |
b481de9c ZY |
999 | } |
1000 | ||
77626355 BC |
1001 | /* |
1002 | * Find correct throughput table for given mode of modulation | |
1003 | */ | |
e227ceac TW |
1004 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
1005 | struct iwl_scale_tbl_info *tbl) | |
b481de9c ZY |
1006 | { |
1007 | if (is_legacy(tbl->lq_type)) { | |
1008 | if (!is_a_band(tbl->lq_type)) | |
1009 | tbl->expected_tpt = expected_tpt_G; | |
1010 | else | |
1011 | tbl->expected_tpt = expected_tpt_A; | |
1012 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1013 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1014 | if (tbl->is_SGI) |
1015 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1016 | else | |
1017 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1018 | else if (tbl->is_SGI) | |
1019 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1020 | else | |
1021 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1022 | ||
fde0db31 | 1023 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1024 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1025 | if (tbl->is_SGI) |
1026 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1027 | else | |
1028 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1029 | else if (tbl->is_SGI) | |
1030 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1031 | else | |
1032 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1033 | } else | |
1034 | tbl->expected_tpt = expected_tpt_G; | |
1035 | } | |
1036 | ||
77626355 BC |
1037 | /* |
1038 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1039 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1040 | * above the current measured throughput of "active" mode, to give new mode | |
1041 | * a fair chance to prove itself without too many challenges. | |
1042 | * | |
1043 | * This gets called when transitioning to more aggressive modulation | |
1044 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1045 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1046 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1047 | * bit rate will typically need to increase, but not if performance was bad. | |
1048 | */ | |
c79dd5b5 | 1049 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1050 | struct iwl_lq_sta *lq_sta, |
1051 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1052 | u16 rate_mask, s8 index) |
b481de9c | 1053 | { |
77626355 | 1054 | /* "active" values */ |
e227ceac | 1055 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1056 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1057 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1058 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1059 | |
1060 | /* expected "search" throughput */ | |
1061 | s32 *tpt_tbl = tbl->expected_tpt; | |
1062 | ||
1063 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1064 | u16 high_low; |
f935a6da | 1065 | s8 rate = index; |
b481de9c ZY |
1066 | |
1067 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1068 | ||
1069 | for (; ;) { | |
bf403db8 EK |
1070 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1071 | tbl->lq_type); | |
b481de9c ZY |
1072 | |
1073 | low = high_low & 0xff; | |
1074 | high = (high_low >> 8) & 0xff; | |
1075 | ||
77626355 BC |
1076 | /* |
1077 | * Lower the "search" bit rate, to give new "search" mode | |
1078 | * approximately the same throughput as "active" if: | |
1079 | * | |
1080 | * 1) "Active" mode has been working modestly well (but not | |
1081 | * great), and expected "search" throughput (under perfect | |
1082 | * conditions) at candidate rate is above the actual | |
1083 | * measured "active" throughput (but less than expected | |
1084 | * "active" throughput under perfect conditions). | |
1085 | * OR | |
1086 | * 2) "Active" mode has been working perfectly or very well | |
1087 | * and expected "search" throughput (under perfect | |
1088 | * conditions) at candidate rate is above expected | |
1089 | * "active" throughput (under perfect conditions). | |
1090 | */ | |
c33104f0 | 1091 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1092 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1093 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1094 | (tpt_tbl[rate] <= active_tpt))) || | |
1095 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1096 | (tpt_tbl[rate] > active_tpt))) { | |
1097 | ||
77626355 BC |
1098 | /* (2nd or later pass) |
1099 | * If we've already tried to raise the rate, and are | |
1100 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1101 | if (start_hi != IWL_RATE_INVALID) { |
1102 | new_rate = start_hi; | |
1103 | break; | |
1104 | } | |
77626355 | 1105 | |
b481de9c | 1106 | new_rate = rate; |
77626355 BC |
1107 | |
1108 | /* Loop again with lower rate */ | |
b481de9c ZY |
1109 | if (low != IWL_RATE_INVALID) |
1110 | rate = low; | |
77626355 BC |
1111 | |
1112 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1113 | else |
1114 | break; | |
77626355 BC |
1115 | |
1116 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1117 | } else { |
77626355 BC |
1118 | /* (2nd or later pass) |
1119 | * If we've already tried to lower the rate, and are | |
1120 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1121 | if (new_rate != IWL_RATE_INVALID) |
1122 | break; | |
77626355 BC |
1123 | |
1124 | /* Loop again with higher rate */ | |
b481de9c ZY |
1125 | else if (high != IWL_RATE_INVALID) { |
1126 | start_hi = high; | |
1127 | rate = high; | |
77626355 BC |
1128 | |
1129 | /* Higher rate not available, use the original */ | |
b481de9c | 1130 | } else { |
90d7795e | 1131 | new_rate = rate; |
b481de9c ZY |
1132 | break; |
1133 | } | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | return new_rate; | |
1138 | } | |
b481de9c | 1139 | |
77626355 BC |
1140 | /* |
1141 | * Set up search table for MIMO | |
1142 | */ | |
fde0db31 | 1143 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1144 | struct iwl_lq_sta *lq_sta, |
270243a5 RR |
1145 | struct ieee80211_conf *conf, |
1146 | struct sta_info *sta, | |
e227ceac | 1147 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1148 | { |
b481de9c ZY |
1149 | u16 rate_mask; |
1150 | s32 rate; | |
c33104f0 | 1151 | s8 is_green = lq_sta->is_green; |
b481de9c | 1152 | |
270243a5 RR |
1153 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1154 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1155 | return -1; |
1156 | ||
00c5ae2f TW |
1157 | if (((sta->ht_info.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
1158 | == WLAN_HT_CAP_SM_PS_STATIC) | |
b481de9c ZY |
1159 | return -1; |
1160 | ||
77626355 | 1161 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1162 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1163 | return -1; |
1164 | ||
eecd6e57 | 1165 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1166 | |
1167 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1168 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1169 | tbl->action = 0; |
39e88504 GC |
1170 | rate_mask = lq_sta->active_mimo2_rate; |
1171 | ||
270243a5 | 1172 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1173 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1174 | tbl->is_fat = 1; |
1175 | else | |
1176 | tbl->is_fat = 0; | |
1177 | ||
39e88504 | 1178 | /* FIXME: - don't toggle SGI here |
b481de9c | 1179 | if (tbl->is_fat) { |
270243a5 | 1180 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1181 | tbl->is_SGI = 1; |
1182 | else | |
1183 | tbl->is_SGI = 0; | |
270243a5 | 1184 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1185 | tbl->is_SGI = 1; |
1186 | else | |
1187 | tbl->is_SGI = 0; | |
39e88504 | 1188 | */ |
b481de9c | 1189 | |
eecd6e57 | 1190 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1191 | |
f935a6da | 1192 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1193 | |
eecd6e57 | 1194 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1195 | |
1196 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1197 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1198 | rate, rate_mask); |
b481de9c | 1199 | return -1; |
39e88504 GC |
1200 | } |
1201 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); | |
b481de9c | 1202 | |
eecd6e57 | 1203 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1204 | tbl->current_rate, is_green); |
dc2453ae | 1205 | return 0; |
fde0db31 | 1206 | } |
b481de9c | 1207 | |
77626355 BC |
1208 | /* |
1209 | * Set up search table for SISO | |
1210 | */ | |
c79dd5b5 | 1211 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1212 | struct iwl_lq_sta *lq_sta, |
270243a5 RR |
1213 | struct ieee80211_conf *conf, |
1214 | struct sta_info *sta, | |
e227ceac | 1215 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1216 | { |
b481de9c | 1217 | u16 rate_mask; |
c33104f0 | 1218 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1219 | s32 rate; |
1220 | ||
270243a5 RR |
1221 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1222 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1223 | return -1; |
1224 | ||
eecd6e57 | 1225 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1226 | |
c33104f0 | 1227 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1228 | tbl->lq_type = LQ_SISO; |
1229 | tbl->action = 0; | |
39e88504 | 1230 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1231 | |
270243a5 RR |
1232 | if (priv->current_ht_config.supported_chan_width |
1233 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1234 | tbl->is_fat = 1; |
1235 | else | |
1236 | tbl->is_fat = 0; | |
1237 | ||
39e88504 | 1238 | /* FIXME: - don't toggle SGI here |
b481de9c | 1239 | if (tbl->is_fat) { |
270243a5 | 1240 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1241 | tbl->is_SGI = 1; |
1242 | else | |
1243 | tbl->is_SGI = 0; | |
270243a5 | 1244 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1245 | tbl->is_SGI = 1; |
1246 | else | |
1247 | tbl->is_SGI = 0; | |
39e88504 | 1248 | */ |
b481de9c ZY |
1249 | |
1250 | if (is_green) | |
39e88504 | 1251 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1252 | |
eecd6e57 | 1253 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1254 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1255 | |
eecd6e57 | 1256 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1257 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1258 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1259 | rate, rate_mask); |
1260 | return -1; | |
1261 | } | |
39e88504 | 1262 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); |
eecd6e57 | 1263 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1264 | tbl->current_rate, is_green); |
403ab56b | 1265 | return 0; |
b481de9c ZY |
1266 | } |
1267 | ||
77626355 BC |
1268 | /* |
1269 | * Try to switch to new modulation mode from legacy | |
1270 | */ | |
c79dd5b5 | 1271 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1272 | struct iwl_lq_sta *lq_sta, |
270243a5 RR |
1273 | struct ieee80211_conf *conf, |
1274 | struct sta_info *sta, | |
b481de9c ZY |
1275 | int index) |
1276 | { | |
e227ceac TW |
1277 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1278 | struct iwl_scale_tbl_info *search_tbl = | |
1279 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1280 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1281 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1282 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1283 | u8 start_action = tbl->action; |
fde0db31 | 1284 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1285 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1286 | int ret = 0; |
b481de9c ZY |
1287 | |
1288 | for (; ;) { | |
1289 | switch (tbl->action) { | |
3110bef7 GC |
1290 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1291 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
f935a6da | 1292 | IWL_DEBUG_RATE("LQ: Legacy toggle Antenna\n"); |
b481de9c | 1293 | |
c33104f0 | 1294 | lq_sta->action_counter++; |
77626355 | 1295 | |
3110bef7 GC |
1296 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1297 | tx_chains_num <= 1) || | |
1298 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1299 | tx_chains_num <= 2)) | |
1300 | break; | |
1301 | ||
77626355 | 1302 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1303 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1304 | break; | |
77626355 | 1305 | |
77626355 | 1306 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1307 | memcpy(search_tbl, tbl, sz); |
1308 | ||
aade00ce GC |
1309 | if (rs_toggle_antenna(valid_tx_ant, |
1310 | &search_tbl->current_rate, search_tbl)) { | |
3110bef7 | 1311 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1312 | goto out; |
1313 | } | |
a5e8b505 | 1314 | break; |
b481de9c | 1315 | case IWL_LEGACY_SWITCH_SISO: |
eecd6e57 | 1316 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1317 | |
1318 | /* Set up search table to try SISO */ | |
b481de9c | 1319 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1320 | search_tbl->is_SGI = 0; |
c33104f0 | 1321 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1322 | search_tbl, index); |
dc2453ae | 1323 | if (!ret) { |
c33104f0 | 1324 | lq_sta->action_counter = 0; |
b481de9c | 1325 | goto out; |
dc2453ae | 1326 | } |
b481de9c ZY |
1327 | |
1328 | break; | |
3110bef7 GC |
1329 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1330 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1331 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
eecd6e57 | 1332 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1333 | |
1334 | /* Set up search table to try MIMO */ | |
b481de9c | 1335 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1336 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1337 | |
1338 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1339 | search_tbl->ant_type = ANT_AB; | |
1340 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1341 | search_tbl->ant_type = ANT_AC; | |
1342 | else | |
1343 | search_tbl->ant_type = ANT_BC; | |
1344 | ||
1345 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1346 | break; | |
1347 | ||
fde0db31 | 1348 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1349 | search_tbl, index); |
dc2453ae | 1350 | if (!ret) { |
c33104f0 | 1351 | lq_sta->action_counter = 0; |
b481de9c | 1352 | goto out; |
dc2453ae | 1353 | } |
b481de9c ZY |
1354 | break; |
1355 | } | |
1356 | tbl->action++; | |
3110bef7 GC |
1357 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1358 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1359 | |
1360 | if (tbl->action == start_action) | |
1361 | break; | |
1362 | ||
1363 | } | |
3110bef7 | 1364 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1365 | return 0; |
1366 | ||
3110bef7 GC |
1367 | out: |
1368 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1369 | tbl->action++; |
3110bef7 GC |
1370 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1371 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1372 | return 0; |
1373 | ||
1374 | } | |
1375 | ||
77626355 BC |
1376 | /* |
1377 | * Try to switch to new modulation mode from SISO | |
1378 | */ | |
c79dd5b5 | 1379 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1380 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1381 | struct ieee80211_conf *conf, |
e227ceac | 1382 | struct sta_info *sta, int index) |
b481de9c | 1383 | { |
c33104f0 | 1384 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1385 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1386 | struct iwl_scale_tbl_info *search_tbl = | |
1387 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1388 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1389 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1390 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1391 | u8 start_action = tbl->action; |
fde0db31 | 1392 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1393 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1394 | int ret; |
b481de9c ZY |
1395 | |
1396 | for (;;) { | |
c33104f0 | 1397 | lq_sta->action_counter++; |
b481de9c | 1398 | switch (tbl->action) { |
3110bef7 GC |
1399 | case IWL_SISO_SWITCH_ANTENNA1: |
1400 | case IWL_SISO_SWITCH_ANTENNA2: | |
eecd6e57 | 1401 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1402 | |
1403 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1404 | tx_chains_num <= 1) || | |
1405 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1406 | tx_chains_num <= 2)) | |
1407 | break; | |
1408 | ||
b481de9c ZY |
1409 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1410 | break; | |
b481de9c ZY |
1411 | |
1412 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1413 | if (rs_toggle_antenna(valid_tx_ant, |
3110bef7 | 1414 | &search_tbl->current_rate, search_tbl)) |
aade00ce | 1415 | goto out; |
a5e8b505 | 1416 | break; |
3110bef7 GC |
1417 | case IWL_SISO_SWITCH_MIMO2_AB: |
1418 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1419 | case IWL_SISO_SWITCH_MIMO2_BC: | |
a5e8b505 | 1420 | IWL_DEBUG_RATE("LQ: SISO switch to MIMO2\n"); |
b481de9c | 1421 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1422 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1423 | |
1424 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1425 | search_tbl->ant_type = ANT_AB; | |
1426 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1427 | search_tbl->ant_type = ANT_AC; | |
1428 | else | |
1429 | search_tbl->ant_type = ANT_BC; | |
1430 | ||
1431 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1432 | break; | |
1433 | ||
fde0db31 | 1434 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1435 | search_tbl, index); |
3110bef7 | 1436 | if (!ret) |
b481de9c ZY |
1437 | goto out; |
1438 | break; | |
1439 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1440 | if (!tbl->is_fat && |
1441 | !(priv->current_ht_config.sgf & | |
1442 | HT_SHORT_GI_20MHZ)) | |
1443 | break; | |
1444 | if (tbl->is_fat && | |
1445 | !(priv->current_ht_config.sgf & | |
1446 | HT_SHORT_GI_40MHZ)) | |
1447 | break; | |
1448 | ||
eecd6e57 | 1449 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1450 | |
b481de9c | 1451 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1452 | if (is_green) { |
1453 | if (!tbl->is_SGI) | |
1454 | break; | |
1455 | else | |
1456 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1457 | } |
39e88504 | 1458 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1459 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1460 | if (tbl->is_SGI) { |
1461 | s32 tpt = lq_sta->last_tpt / 100; | |
1462 | if (tpt >= search_tbl->expected_tpt[index]) | |
1463 | break; | |
1464 | } | |
1465 | search_tbl->current_rate = rate_n_flags_from_tbl( | |
1466 | search_tbl, index, is_green); | |
b481de9c ZY |
1467 | goto out; |
1468 | } | |
1469 | tbl->action++; | |
1470 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1471 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1472 | |
1473 | if (tbl->action == start_action) | |
1474 | break; | |
1475 | } | |
3110bef7 | 1476 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1477 | return 0; |
1478 | ||
1479 | out: | |
3110bef7 | 1480 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1481 | tbl->action++; |
1482 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1483 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1484 | return 0; |
1485 | } | |
1486 | ||
77626355 BC |
1487 | /* |
1488 | * Try to switch to new modulation mode from MIMO | |
1489 | */ | |
c79dd5b5 | 1490 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
e227ceac | 1491 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1492 | struct ieee80211_conf *conf, |
e227ceac | 1493 | struct sta_info *sta, int index) |
b481de9c | 1494 | { |
c33104f0 | 1495 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1496 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1497 | struct iwl_scale_tbl_info *search_tbl = | |
1498 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1499 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
e227ceac TW |
1500 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1501 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1502 | u8 start_action = tbl->action; |
3110bef7 GC |
1503 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1504 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
aade00ce | 1505 | int ret; |
b481de9c ZY |
1506 | |
1507 | for (;;) { | |
c33104f0 | 1508 | lq_sta->action_counter++; |
b481de9c | 1509 | switch (tbl->action) { |
3110bef7 GC |
1510 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1511 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
1512 | IWL_DEBUG_RATE("LQ: MIMO toggle Antennas\n"); | |
1513 | ||
1514 | if (tx_chains_num <= 2) | |
1515 | break; | |
1516 | ||
1517 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1518 | break; | |
1519 | ||
1520 | memcpy(search_tbl, tbl, sz); | |
1521 | if (rs_toggle_antenna(valid_tx_ant, | |
1522 | &search_tbl->current_rate, search_tbl)) | |
1523 | goto out; | |
1524 | break; | |
1525 | case IWL_MIMO2_SWITCH_SISO_A: | |
1526 | case IWL_MIMO2_SWITCH_SISO_B: | |
1527 | case IWL_MIMO2_SWITCH_SISO_C: | |
eecd6e57 | 1528 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1529 | |
77626355 | 1530 | /* Set up new search table for SISO */ |
b481de9c | 1531 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1532 | |
3110bef7 | 1533 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1534 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1535 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1536 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1537 | else |
1538 | search_tbl->ant_type = ANT_C; | |
1539 | ||
1540 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1541 | break; | |
b481de9c | 1542 | |
c33104f0 | 1543 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1544 | search_tbl, index); |
3110bef7 | 1545 | if (!ret) |
b481de9c | 1546 | goto out; |
3110bef7 | 1547 | |
b481de9c ZY |
1548 | break; |
1549 | ||
3110bef7 | 1550 | case IWL_MIMO2_SWITCH_GI: |
a9841013 EG |
1551 | if (!tbl->is_fat && |
1552 | !(priv->current_ht_config.sgf & | |
1553 | HT_SHORT_GI_20MHZ)) | |
1554 | break; | |
1555 | if (tbl->is_fat && | |
1556 | !(priv->current_ht_config.sgf & | |
1557 | HT_SHORT_GI_40MHZ)) | |
1558 | break; | |
1559 | ||
eecd6e57 | 1560 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1561 | |
1562 | /* Set up new search table for MIMO */ | |
b481de9c | 1563 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1564 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1565 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1566 | /* |
1567 | * If active table already uses the fastest possible | |
1568 | * modulation (dual stream with short guard interval), | |
1569 | * and it's working well, there's no need to look | |
1570 | * for a better type of modulation! | |
1571 | */ | |
39e88504 | 1572 | if (tbl->is_SGI) { |
c33104f0 | 1573 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1574 | if (tpt >= search_tbl->expected_tpt[index]) |
1575 | break; | |
b481de9c | 1576 | } |
39e88504 GC |
1577 | search_tbl->current_rate = rate_n_flags_from_tbl( |
1578 | search_tbl, index, is_green); | |
b481de9c ZY |
1579 | goto out; |
1580 | ||
1581 | } | |
1582 | tbl->action++; | |
3110bef7 GC |
1583 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1584 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1585 | |
1586 | if (tbl->action == start_action) | |
1587 | break; | |
1588 | } | |
3110bef7 | 1589 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1590 | return 0; |
1591 | out: | |
3110bef7 | 1592 | lq_sta->search_better_tbl = 1; |
b481de9c | 1593 | tbl->action++; |
3110bef7 GC |
1594 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1595 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1596 | return 0; |
1597 | ||
1598 | } | |
1599 | ||
77626355 BC |
1600 | /* |
1601 | * Check whether we should continue using same modulation mode, or | |
1602 | * begin search for a new mode, based on: | |
1603 | * 1) # tx successes or failures while using this mode | |
1604 | * 2) # times calling this function | |
1605 | * 3) elapsed time in this mode (not used, for now) | |
1606 | */ | |
e227ceac | 1607 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1608 | { |
e227ceac | 1609 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1610 | int i; |
1611 | int active_tbl; | |
1612 | int flush_interval_passed = 0; | |
bf403db8 | 1613 | struct iwl_priv *priv; |
b481de9c | 1614 | |
bf403db8 | 1615 | priv = lq_sta->drv; |
c33104f0 | 1616 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1617 | |
c33104f0 | 1618 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1619 | |
77626355 | 1620 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1621 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1622 | |
77626355 | 1623 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1624 | if (lq_sta->flush_timer) |
b481de9c ZY |
1625 | flush_interval_passed = |
1626 | time_after(jiffies, | |
c33104f0 | 1627 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1628 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1629 | ||
77626355 BC |
1630 | /* |
1631 | * Check if we should allow search for new modulation mode. | |
1632 | * If many frames have failed or succeeded, or we've used | |
1633 | * this same modulation for a long time, allow search, and | |
1634 | * reset history stats that keep track of whether we should | |
1635 | * allow a new search. Also (below) reset all bitmaps and | |
1636 | * stats in active history. | |
1637 | */ | |
c33104f0 TW |
1638 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1639 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1640 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1641 | && (flush_interval_passed))) { |
eecd6e57 | 1642 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1643 | lq_sta->total_failed, |
1644 | lq_sta->total_success, | |
b481de9c | 1645 | flush_interval_passed); |
77626355 BC |
1646 | |
1647 | /* Allow search for new mode */ | |
c33104f0 TW |
1648 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1649 | lq_sta->total_failed = 0; | |
1650 | lq_sta->total_success = 0; | |
1651 | lq_sta->flush_timer = 0; | |
77626355 BC |
1652 | |
1653 | /* | |
1654 | * Else if we've used this modulation mode enough repetitions | |
1655 | * (regardless of elapsed time or success/failure), reset | |
1656 | * history bitmaps and rate-specific stats for all rates in | |
1657 | * active table. | |
1658 | */ | |
403ab56b | 1659 | } else { |
c33104f0 TW |
1660 | lq_sta->table_count++; |
1661 | if (lq_sta->table_count >= | |
1662 | lq_sta->table_count_limit) { | |
1663 | lq_sta->table_count = 0; | |
b481de9c | 1664 | |
eecd6e57 | 1665 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1666 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1667 | rs_rate_scale_clear_window( | |
1668 | &(tbl->win[i])); | |
1669 | } | |
1670 | } | |
1671 | ||
77626355 BC |
1672 | /* If transitioning to allow "search", reset all history |
1673 | * bitmaps and stats in active table (this will become the new | |
1674 | * "search" table). */ | |
c33104f0 | 1675 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1676 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1677 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1678 | } | |
1679 | } | |
1680 | } | |
1681 | ||
77626355 BC |
1682 | /* |
1683 | * Do rate scaling and search for new modulation mode. | |
1684 | */ | |
c79dd5b5 | 1685 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
1686 | struct net_device *dev, |
1687 | struct ieee80211_hdr *hdr, | |
1688 | struct sta_info *sta) | |
1689 | { | |
270243a5 RR |
1690 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
1691 | struct ieee80211_hw *hw = local_to_hw(local); | |
1692 | struct ieee80211_conf *conf = &hw->conf; | |
b481de9c ZY |
1693 | int low = IWL_RATE_INVALID; |
1694 | int high = IWL_RATE_INVALID; | |
1695 | int index; | |
1696 | int i; | |
e227ceac | 1697 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1698 | int current_tpt = IWL_INVALID_VALUE; |
1699 | int low_tpt = IWL_INVALID_VALUE; | |
1700 | int high_tpt = IWL_INVALID_VALUE; | |
1701 | u32 fail_count; | |
1702 | s8 scale_action = 0; | |
fd7c8a40 HH |
1703 | __le16 fc; |
1704 | u16 rate_mask; | |
b481de9c | 1705 | u8 update_lq = 0; |
e227ceac TW |
1706 | struct iwl_lq_sta *lq_sta; |
1707 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
b481de9c | 1708 | u16 rate_scale_index_msk = 0; |
39e88504 | 1709 | u32 rate; |
b481de9c ZY |
1710 | u8 is_green = 0; |
1711 | u8 active_tbl = 0; | |
1712 | u8 done_search = 0; | |
1713 | u16 high_low; | |
a5e8b505 | 1714 | s32 sr; |
0c11b4de | 1715 | u8 tid = MAX_TID_COUNT; |
b481de9c ZY |
1716 | |
1717 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1718 | ||
fd7c8a40 | 1719 | fc = hdr->frame_control; |
b481de9c ZY |
1720 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
1721 | /* Send management frames and broadcast/multicast data using | |
1722 | * lowest rate. */ | |
1723 | /* TODO: this could probably be improved.. */ | |
1724 | return; | |
1725 | } | |
1726 | ||
1727 | if (!sta || !sta->rate_ctrl_priv) | |
1728 | return; | |
1729 | ||
e227ceac | 1730 | lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv; |
68d12b7c | 1731 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1732 | |
faa29718 RR |
1733 | tid = rs_tl_add_packet(lq_sta, hdr); |
1734 | ||
77626355 BC |
1735 | /* |
1736 | * Select rate-scale / modulation-mode table to work with in | |
1737 | * the rest of this function: "search" if searching for better | |
1738 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1739 | */ | |
c33104f0 TW |
1740 | if (!lq_sta->search_better_tbl) |
1741 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1742 | else |
c33104f0 | 1743 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1744 | |
c33104f0 TW |
1745 | tbl = &(lq_sta->lq_info[active_tbl]); |
1746 | is_green = lq_sta->is_green; | |
b481de9c | 1747 | |
77626355 | 1748 | /* current tx rate */ |
8318d78a | 1749 | index = sta->last_txrate_idx; |
b481de9c ZY |
1750 | |
1751 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1752 | tbl->lq_type); | |
1753 | ||
77626355 | 1754 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1755 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1756 | |
1757 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1758 | ||
1759 | /* mask with station rate restriction */ | |
1760 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1761 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1762 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1763 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1764 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1765 | else |
1766 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1767 | lq_sta->supp_rates); |
b481de9c ZY |
1768 | |
1769 | } else | |
1770 | rate_scale_index_msk = rate_mask; | |
1771 | ||
1772 | if (!rate_scale_index_msk) | |
1773 | rate_scale_index_msk = rate_mask; | |
1774 | ||
07bc28ed GC |
1775 | if (!((1 << index) & rate_scale_index_msk)) { |
1776 | IWL_ERROR("Current Rate is not valid\n"); | |
1777 | return; | |
b481de9c ZY |
1778 | } |
1779 | ||
77626355 | 1780 | /* Get expected throughput table and history window for current rate */ |
07bc28ed GC |
1781 | if (!tbl->expected_tpt) { |
1782 | IWL_ERROR("tbl->expected_tpt is NULL\n"); | |
1783 | return; | |
1784 | } | |
b481de9c ZY |
1785 | |
1786 | window = &(tbl->win[index]); | |
1787 | ||
77626355 BC |
1788 | /* |
1789 | * If there is not enough history to calculate actual average | |
1790 | * throughput, keep analyzing results of more tx frames, without | |
1791 | * changing rate or mode (bypass most of the rest of this function). | |
1792 | * Set up new rate table in uCode only if old rate is not supported | |
1793 | * in current association (use new rate found above). | |
1794 | */ | |
b481de9c | 1795 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1796 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1797 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1798 | IWL_DEBUG_RATE("LQ: still below TH. succ=%d total=%d " | |
b481de9c ZY |
1799 | "for index %d\n", |
1800 | window->success_counter, window->counter, index); | |
77626355 BC |
1801 | |
1802 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1803 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1804 | |
1805 | /* Should we stay with this modulation mode, | |
1806 | * or search for a new one? */ | |
c33104f0 | 1807 | rs_stay_in_table(lq_sta); |
77626355 | 1808 | |
b481de9c | 1809 | goto out; |
3110bef7 | 1810 | } |
b481de9c | 1811 | |
77626355 BC |
1812 | /* Else we have enough samples; calculate estimate of |
1813 | * actual average throughput */ | |
3110bef7 GC |
1814 | |
1815 | BUG_ON(window->average_tpt != ((window->success_ratio * | |
1816 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 1817 | |
77626355 | 1818 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1819 | if (lq_sta->search_better_tbl) { |
b481de9c | 1820 | |
77626355 BC |
1821 | /* If good success, continue using the "search" mode; |
1822 | * no need to send new link quality command, since we're | |
1823 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1824 | if (window->average_tpt > lq_sta->last_tpt) { |
1825 | ||
3110bef7 | 1826 | IWL_DEBUG_RATE("LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
1827 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1828 | window->success_ratio, | |
1829 | window->average_tpt, | |
1830 | lq_sta->last_tpt); | |
1831 | ||
1832 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1833 | lq_sta->enable_counter = 1; |
07bc28ed | 1834 | |
77626355 | 1835 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1836 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1837 | current_tpt = window->average_tpt; |
77626355 BC |
1838 | |
1839 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1840 | } else { |
07bc28ed GC |
1841 | |
1842 | IWL_DEBUG_RATE("LQ: GOING BACK TO THE OLD TABLE " | |
1843 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1844 | window->success_ratio, | |
1845 | window->average_tpt, | |
1846 | lq_sta->last_tpt); | |
1847 | ||
77626355 | 1848 | /* Nullify "search" table */ |
b481de9c | 1849 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1850 | |
1851 | /* Revert to "active" table */ | |
c33104f0 TW |
1852 | active_tbl = lq_sta->active_tbl; |
1853 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1854 | |
77626355 | 1855 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 1856 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 1857 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1858 | |
77626355 | 1859 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1860 | update_lq = 1; |
b481de9c | 1861 | } |
77626355 BC |
1862 | |
1863 | /* Either way, we've made a decision; modulation mode | |
1864 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1865 | lq_sta->search_better_tbl = 0; |
77626355 | 1866 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1867 | goto lq_update; |
1868 | } | |
1869 | ||
77626355 BC |
1870 | /* (Else) not in search of better modulation mode, try for better |
1871 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1872 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1873 | tbl->lq_type); |
1874 | low = high_low & 0xff; | |
1875 | high = (high_low >> 8) & 0xff; | |
1876 | ||
a5e8b505 GC |
1877 | sr = window->success_ratio; |
1878 | ||
77626355 | 1879 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1880 | current_tpt = window->average_tpt; |
b481de9c ZY |
1881 | if (low != IWL_RATE_INVALID) |
1882 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1883 | if (high != IWL_RATE_INVALID) |
1884 | high_tpt = tbl->win[high].average_tpt; | |
1885 | ||
a5e8b505 | 1886 | scale_action = 0; |
b481de9c | 1887 | |
77626355 | 1888 | /* Too many failures, decrease rate */ |
a5e8b505 | 1889 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
b481de9c ZY |
1890 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
1891 | scale_action = -1; | |
77626355 BC |
1892 | |
1893 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 1894 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
1895 | (high_tpt == IWL_INVALID_VALUE)) { |
1896 | ||
1897 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
1898 | scale_action = 1; | |
1899 | else if (low != IWL_RATE_INVALID) | |
1900 | scale_action = -1; | |
1901 | } | |
77626355 BC |
1902 | |
1903 | /* Both adjacent throughputs are measured, but neither one has better | |
1904 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1905 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1906 | (high_tpt != IWL_INVALID_VALUE) && | |
1907 | (low_tpt < current_tpt) && | |
1908 | (high_tpt < current_tpt)) | |
1909 | scale_action = 0; | |
77626355 BC |
1910 | |
1911 | /* At least one adjacent rate's throughput is measured, | |
1912 | * and may have better performance. */ | |
b481de9c | 1913 | else { |
77626355 | 1914 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1915 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1916 | /* Higher rate has better throughput */ |
a5e8b505 GC |
1917 | if (high_tpt > current_tpt && |
1918 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 1919 | scale_action = 1; |
a5e8b505 | 1920 | } else { |
b481de9c ZY |
1921 | IWL_DEBUG_RATE |
1922 | ("decrease rate because of high tpt\n"); | |
1923 | scale_action = -1; | |
1924 | } | |
77626355 BC |
1925 | |
1926 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1927 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1928 | /* Lower rate has better throughput */ |
b481de9c ZY |
1929 | if (low_tpt > current_tpt) { |
1930 | IWL_DEBUG_RATE | |
1931 | ("decrease rate because of low tpt\n"); | |
1932 | scale_action = -1; | |
a5e8b505 | 1933 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 1934 | scale_action = 1; |
a5e8b505 | 1935 | } |
b481de9c ZY |
1936 | } |
1937 | } | |
1938 | ||
77626355 BC |
1939 | /* Sanity check; asked for decrease, but success rate or throughput |
1940 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
1941 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
1942 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 1943 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
1944 | scale_action = 0; |
1945 | ||
1946 | switch (scale_action) { | |
1947 | case -1: | |
77626355 | 1948 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1949 | if (low != IWL_RATE_INVALID) { |
1950 | update_lq = 1; | |
1951 | index = low; | |
1952 | } | |
1953 | break; | |
1954 | case 1: | |
77626355 | 1955 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1956 | if (high != IWL_RATE_INVALID) { |
1957 | update_lq = 1; | |
1958 | index = high; | |
1959 | } | |
1960 | ||
1961 | break; | |
1962 | case 0: | |
77626355 | 1963 | /* No change */ |
b481de9c ZY |
1964 | default: |
1965 | break; | |
1966 | } | |
1967 | ||
eecd6e57 | 1968 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1969 | "high %d type %d\n", |
1970 | index, scale_action, low, high, tbl->lq_type); | |
1971 | ||
a5e8b505 | 1972 | lq_update: |
77626355 | 1973 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1974 | if (update_lq) { |
39e88504 | 1975 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
07bc28ed | 1976 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1977 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1978 | } |
77626355 BC |
1979 | |
1980 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1981 | rs_stay_in_table(lq_sta); |
b481de9c | 1982 | |
77626355 BC |
1983 | /* |
1984 | * Search for new modulation mode if we're: | |
1985 | * 1) Not changing rates right now | |
1986 | * 2) Not just finishing up a search | |
1987 | * 3) Allowing a new search | |
1988 | */ | |
47cfd463 | 1989 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 1990 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1991 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1992 | |
77626355 BC |
1993 | /* Select a new "search" modulation mode to try. |
1994 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1995 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1996 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1997 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1998 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1999 | else |
c33104f0 | 2000 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2001 | |
77626355 | 2002 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2003 | if (lq_sta->search_better_tbl) { |
77626355 | 2004 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2005 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2006 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2007 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2008 | ||
77626355 | 2009 | /* Use new "search" start rate */ |
e7d326ac | 2010 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2011 | |
eecd6e57 | 2012 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 | 2013 | tbl->current_rate, index); |
07bc28ed | 2014 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 2015 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 2016 | } |
b481de9c | 2017 | |
77626355 BC |
2018 | /* If the "active" (non-search) mode was legacy, |
2019 | * and we've tried switching antennas, | |
2020 | * but we haven't been able to try HT modes (not available), | |
2021 | * stay with best antenna legacy modulation for a while | |
2022 | * before next round of mode comparisons. */ | |
c33104f0 | 2023 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 2024 | if (is_legacy(tbl1->lq_type) && |
270243a5 | 2025 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
c33104f0 TW |
2026 | (lq_sta->action_counter >= 1)) { |
2027 | lq_sta->action_counter = 0; | |
eecd6e57 | 2028 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
bf403db8 | 2029 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2030 | } |
2031 | ||
77626355 BC |
2032 | /* If we're in an HT mode, and all 3 mode switch actions |
2033 | * have been tried and compared, stay in this best modulation | |
2034 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2035 | if (lq_sta->enable_counter && |
2036 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2037 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2038 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2039 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 2040 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 2041 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 2042 | } |
c33104f0 | 2043 | lq_sta->action_counter = 0; |
bf403db8 | 2044 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2045 | } |
77626355 BC |
2046 | |
2047 | /* | |
2048 | * Else, don't search for a new modulation mode. | |
2049 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2050 | * 1) Not changing rates right now | |
2051 | * 2) Not just finishing up a search | |
2052 | * 3) flush timer is empty | |
2053 | */ | |
b481de9c | 2054 | } else { |
c33104f0 TW |
2055 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2056 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2057 | } |
2058 | ||
2059 | out: | |
39e88504 | 2060 | tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green); |
b481de9c | 2061 | i = index; |
8318d78a | 2062 | sta->last_txrate_idx = i; |
b481de9c | 2063 | |
8318d78a | 2064 | /* sta->txrate_idx is an index to A mode rates which start |
b481de9c ZY |
2065 | * at IWL_FIRST_OFDM_RATE |
2066 | */ | |
8318d78a JB |
2067 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
2068 | sta->txrate_idx = i - IWL_FIRST_OFDM_RATE; | |
b481de9c | 2069 | else |
8318d78a | 2070 | sta->txrate_idx = i; |
b481de9c ZY |
2071 | |
2072 | return; | |
2073 | } | |
2074 | ||
2075 | ||
c79dd5b5 | 2076 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2077 | struct ieee80211_conf *conf, |
b481de9c ZY |
2078 | struct sta_info *sta) |
2079 | { | |
e227ceac TW |
2080 | struct iwl_lq_sta *lq_sta; |
2081 | struct iwl_scale_tbl_info *tbl; | |
b481de9c | 2082 | int rate_idx; |
aade00ce | 2083 | int i; |
39e88504 | 2084 | u32 rate; |
aade00ce GC |
2085 | u8 use_green = rs_use_green(priv, conf); |
2086 | u8 active_tbl = 0; | |
2087 | u8 valid_tx_ant; | |
b481de9c ZY |
2088 | |
2089 | if (!sta || !sta->rate_ctrl_priv) | |
2090 | goto out; | |
2091 | ||
e227ceac | 2092 | lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2093 | i = sta->last_txrate_idx; |
b481de9c | 2094 | |
c33104f0 | 2095 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2096 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2097 | goto out; |
2098 | ||
aade00ce GC |
2099 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2100 | ||
c33104f0 TW |
2101 | if (!lq_sta->search_better_tbl) |
2102 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2103 | else |
c33104f0 | 2104 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2105 | |
c33104f0 | 2106 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2107 | |
2108 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2109 | i = 0; | |
2110 | ||
fde0db31 | 2111 | /* FIXME:RS: This is also wrong in 4965 */ |
1826dcc0 | 2112 | rate = iwl_rates[i].plcp; |
39e88504 GC |
2113 | rate |= RATE_MCS_ANT_B_MSK; |
2114 | rate &= ~RATE_MCS_ANT_A_MSK; | |
b481de9c ZY |
2115 | |
2116 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2117 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2118 | |
fde0db31 | 2119 | tbl->ant_type = ANT_B; |
39e88504 | 2120 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2121 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2122 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2123 | |
39e88504 GC |
2124 | rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green); |
2125 | tbl->current_rate = rate; | |
eecd6e57 | 2126 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2127 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2128 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2129 | out: |
2130 | return; | |
2131 | } | |
2132 | ||
1abbe498 | 2133 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
8318d78a JB |
2134 | struct ieee80211_supported_band *sband, |
2135 | struct sk_buff *skb, | |
1abbe498 | 2136 | struct rate_selection *sel) |
b481de9c ZY |
2137 | { |
2138 | ||
2139 | int i; | |
2140 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
270243a5 | 2141 | struct ieee80211_conf *conf = &local->hw.conf; |
b481de9c ZY |
2142 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2143 | struct sta_info *sta; | |
fd7c8a40 | 2144 | __le16 fc; |
c79dd5b5 | 2145 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
e227ceac | 2146 | struct iwl_lq_sta *lq_sta; |
b481de9c | 2147 | |
58826351 | 2148 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2149 | |
d0709a65 JB |
2150 | rcu_read_lock(); |
2151 | ||
b481de9c ZY |
2152 | sta = sta_info_get(local, hdr->addr1); |
2153 | ||
2bc454b0 MW |
2154 | /* Send management frames and broadcast/multicast data using lowest |
2155 | * rate. */ | |
fd7c8a40 | 2156 | fc = hdr->frame_control; |
2bc454b0 MW |
2157 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || |
2158 | !sta || !sta->rate_ctrl_priv) { | |
2e92e6f2 | 2159 | sel->rate_idx = rate_lowest_index(local, sband, sta); |
f4d6082d | 2160 | goto out; |
b481de9c ZY |
2161 | } |
2162 | ||
e227ceac | 2163 | lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2164 | i = sta->last_txrate_idx; |
b481de9c | 2165 | |
05c914fe | 2166 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2167 | !lq_sta->ibss_sta_added) { |
947b13a7 | 2168 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
0795af57 | 2169 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
2170 | |
2171 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2172 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2173 | print_mac(mac, hdr->addr1)); | |
4f40e4d9 | 2174 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2175 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2176 | } |
2177 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2178 | lq_sta->lq.sta_id = sta_id; |
2179 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2180 | lq_sta->ibss_sta_added = 1; | |
270243a5 | 2181 | rs_initialize_lq(priv, conf, sta); |
b481de9c | 2182 | } |
b481de9c ZY |
2183 | } |
2184 | ||
1abbe498 | 2185 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
2e92e6f2 | 2186 | sel->rate_idx = rate_lowest_index(local, sband, sta); |
f4d6082d | 2187 | goto out; |
1abbe498 | 2188 | } |
b481de9c | 2189 | |
2e92e6f2 JB |
2190 | if (sband->band == IEEE80211_BAND_5GHZ) |
2191 | i -= IWL_FIRST_OFDM_RATE; | |
2192 | sel->rate_idx = i; | |
f4d6082d TW |
2193 | out: |
2194 | rcu_read_unlock(); | |
b481de9c ZY |
2195 | } |
2196 | ||
bf403db8 | 2197 | static void *rs_alloc_sta(void *priv_rate, gfp_t gfp) |
b481de9c | 2198 | { |
e227ceac | 2199 | struct iwl_lq_sta *lq_sta; |
bf403db8 | 2200 | struct iwl_priv *priv; |
b481de9c ZY |
2201 | int i, j; |
2202 | ||
bf403db8 | 2203 | priv = (struct iwl_priv *)priv_rate; |
b481de9c ZY |
2204 | IWL_DEBUG_RATE("create station rate scale window\n"); |
2205 | ||
e227ceac | 2206 | lq_sta = kzalloc(sizeof(struct iwl_lq_sta), gfp); |
b481de9c | 2207 | |
c33104f0 | 2208 | if (lq_sta == NULL) |
b481de9c | 2209 | return NULL; |
c33104f0 | 2210 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2211 | |
63fddb9f | 2212 | |
b481de9c ZY |
2213 | for (j = 0; j < LQ_SIZE; j++) |
2214 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2215 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2216 | |
c33104f0 | 2217 | return lq_sta; |
b481de9c ZY |
2218 | } |
2219 | ||
2220 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
2221 | struct ieee80211_local *local, | |
2222 | struct sta_info *sta) | |
2223 | { | |
2224 | int i, j; | |
270243a5 | 2225 | struct ieee80211_conf *conf = &local->hw.conf; |
8318d78a | 2226 | struct ieee80211_supported_band *sband; |
c79dd5b5 | 2227 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
e227ceac | 2228 | struct iwl_lq_sta *lq_sta = priv_sta; |
b481de9c | 2229 | |
8318d78a JB |
2230 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
2231 | ||
c33104f0 | 2232 | lq_sta->flush_timer = 0; |
8318d78a JB |
2233 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
2234 | sta->txrate_idx = 3; | |
b481de9c ZY |
2235 | for (j = 0; j < LQ_SIZE; j++) |
2236 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2237 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2238 | |
3110bef7 | 2239 | IWL_DEBUG_RATE("LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2240 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2241 | * the lowest or the highest rate.. Could consider using RSSI from | |
2242 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2243 | * after assoc.. */ | |
2244 | ||
c33104f0 | 2245 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2246 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
17741cdc | 2247 | u8 sta_id = iwl_find_station(priv, sta->sta.addr); |
0795af57 JP |
2248 | DECLARE_MAC_BUF(mac); |
2249 | ||
b481de9c | 2250 | /* for IBSS the call are from tasklet */ |
eecd6e57 | 2251 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
17741cdc | 2252 | print_mac(mac, sta->sta.addr)); |
b481de9c ZY |
2253 | |
2254 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 | 2255 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
17741cdc JB |
2256 | print_mac(mac, sta->sta.addr)); |
2257 | sta_id = iwl_add_station_flags(priv, sta->sta.addr, | |
67d62035 | 2258 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2259 | } |
2260 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2261 | lq_sta->lq.sta_id = sta_id; |
2262 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2263 | } |
2264 | /* FIXME: this is w/a remove it later */ | |
2265 | priv->assoc_station_added = 1; | |
2266 | } | |
2267 | ||
77626355 | 2268 | /* Find highest tx rate supported by hardware and destination station */ |
8318d78a JB |
2269 | for (i = 0; i < sband->n_bitrates; i++) |
2270 | if (sta->supp_rates[sband->band] & BIT(i)) | |
2271 | sta->txrate_idx = i; | |
2272 | ||
2273 | sta->last_txrate_idx = sta->txrate_idx; | |
05ecc2c1 | 2274 | /* For MODE_IEEE80211A, skip over cck rates in global rate table */ |
8318d78a JB |
2275 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
2276 | sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
b481de9c | 2277 | |
c33104f0 | 2278 | lq_sta->is_dup = 0; |
c33104f0 | 2279 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2280 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2281 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2282 | lq_sta->band = priv->band; |
77626355 BC |
2283 | /* |
2284 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2285 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2286 | */ | |
263b5f5a RR |
2287 | lq_sta->active_siso_rate = conf->ht_conf.supp_mcs_set[0] << 1; |
2288 | lq_sta->active_siso_rate |= conf->ht_conf.supp_mcs_set[0] & 0x1; | |
c33104f0 | 2289 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2290 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2291 | |
77626355 | 2292 | /* Same here */ |
263b5f5a RR |
2293 | lq_sta->active_mimo2_rate = conf->ht_conf.supp_mcs_set[1] << 1; |
2294 | lq_sta->active_mimo2_rate |= conf->ht_conf.supp_mcs_set[1] & 0x1; | |
fde0db31 GC |
2295 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2296 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2297 | ||
263b5f5a RR |
2298 | lq_sta->active_mimo3_rate = conf->ht_conf.supp_mcs_set[2] << 1; |
2299 | lq_sta->active_mimo3_rate |= conf->ht_conf.supp_mcs_set[2] & 0x1; | |
fde0db31 GC |
2300 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2301 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2302 | ||
07bc28ed | 2303 | IWL_DEBUG_RATE("SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2304 | lq_sta->active_siso_rate, |
fde0db31 GC |
2305 | lq_sta->active_mimo2_rate, |
2306 | lq_sta->active_mimo3_rate); | |
2307 | ||
07bc28ed GC |
2308 | /* These values will be overriden later */ |
2309 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; | |
2310 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2311 | ||
0c11b4de RR |
2312 | /* as default allow aggregation for all tids */ |
2313 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2314 | lq_sta->drv = priv; |
b481de9c | 2315 | |
270243a5 | 2316 | rs_initialize_lq(priv, conf, sta); |
b481de9c ZY |
2317 | } |
2318 | ||
fde0db31 | 2319 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 2320 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2321 | { |
e227ceac | 2322 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2323 | int index = 0; |
b481de9c | 2324 | int rate_idx; |
1b696de2 | 2325 | int repeat_rate = 0; |
aade00ce | 2326 | u8 ant_toggle_cnt = 0; |
b481de9c | 2327 | u8 use_ht_possible = 1; |
aade00ce | 2328 | u8 valid_tx_ant = 0; |
07bc28ed | 2329 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2330 | |
77626355 | 2331 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2332 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2333 | |
39e88504 | 2334 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2335 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2336 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2337 | &tbl_type, &rate_idx); |
2338 | ||
77626355 | 2339 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2340 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2341 | ant_toggle_cnt = 1; |
1b696de2 | 2342 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2343 | } else { |
1b696de2 | 2344 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2345 | } |
b481de9c ZY |
2346 | |
2347 | lq_cmd->general_params.mimo_delimiter = | |
2348 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2349 | |
2350 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2351 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2352 | |
07bc28ed GC |
2353 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2354 | lq_cmd->general_params.single_stream_ant_msk = | |
2355 | tbl_type.ant_type; | |
2356 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2357 | lq_cmd->general_params.dual_stream_ant_msk = | |
2358 | tbl_type.ant_type; | |
2359 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2360 | |
2361 | index++; | |
1b696de2 | 2362 | repeat_rate--; |
b481de9c | 2363 | |
aade00ce GC |
2364 | if (priv) |
2365 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2366 | ||
77626355 | 2367 | /* Fill rest of rate table */ |
b481de9c | 2368 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2369 | /* Repeat initial/next rate. |
2370 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2371 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2372 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2373 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2374 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2375 | ant_toggle_cnt++; | |
2376 | else if (priv && | |
2377 | rs_toggle_antenna(valid_tx_ant, | |
2378 | &new_rate, &tbl_type)) | |
2379 | ant_toggle_cnt = 1; | |
2380 | } | |
98d7e09a | 2381 | |
77626355 | 2382 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2383 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2384 | |
2385 | /* Fill next table entry */ | |
b481de9c | 2386 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2387 | cpu_to_le32(new_rate); |
1b696de2 | 2388 | repeat_rate--; |
b481de9c ZY |
2389 | index++; |
2390 | } | |
2391 | ||
39e88504 | 2392 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2393 | &rate_idx); |
2394 | ||
77626355 BC |
2395 | /* Indicate to uCode which entries might be MIMO. |
2396 | * If initial rate was MIMO, this will finally end up | |
2397 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2398 | if (is_mimo(tbl_type.lq_type)) |
2399 | lq_cmd->general_params.mimo_delimiter = index; | |
2400 | ||
77626355 | 2401 | /* Get next rate */ |
39e88504 GC |
2402 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2403 | use_ht_possible); | |
b481de9c | 2404 | |
77626355 | 2405 | /* How many times should we repeat the next rate? */ |
b481de9c | 2406 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2407 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2408 | ant_toggle_cnt++; | |
2409 | else if (priv && | |
2410 | rs_toggle_antenna(valid_tx_ant, | |
2411 | &new_rate, &tbl_type)) | |
2412 | ant_toggle_cnt = 1; | |
2413 | ||
1b696de2 | 2414 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2415 | } else { |
1b696de2 | 2416 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2417 | } |
b481de9c | 2418 | |
77626355 BC |
2419 | /* Don't allow HT rates after next pass. |
2420 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2421 | use_ht_possible = 0; |
2422 | ||
77626355 | 2423 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2424 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2425 | |
2426 | /* Fill next table entry */ | |
39e88504 | 2427 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2428 | |
2429 | index++; | |
1b696de2 | 2430 | repeat_rate--; |
b481de9c ZY |
2431 | } |
2432 | ||
5e1dd8dc | 2433 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2434 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2435 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2436 | } |
2437 | ||
2438 | static void *rs_alloc(struct ieee80211_local *local) | |
2439 | { | |
2440 | return local->hw.priv; | |
2441 | } | |
2442 | /* rate scale requires free function to be implemented */ | |
2443 | static void rs_free(void *priv_rate) | |
2444 | { | |
2445 | return; | |
2446 | } | |
2447 | ||
2448 | static void rs_clear(void *priv_rate) | |
2449 | { | |
e170402e | 2450 | #ifdef CONFIG_IWLWIFI_DEBUG |
c79dd5b5 | 2451 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
b481de9c ZY |
2452 | |
2453 | IWL_DEBUG_RATE("enter\n"); | |
2454 | ||
36e1f16e | 2455 | /* TODO - add rate scale state reset */ |
b481de9c ZY |
2456 | |
2457 | IWL_DEBUG_RATE("leave\n"); | |
e170402e | 2458 | #endif /* CONFIG_IWLWIFI_DEBUG */ |
b481de9c ZY |
2459 | } |
2460 | ||
bf403db8 | 2461 | static void rs_free_sta(void *priv_rate, void *priv_sta) |
b481de9c | 2462 | { |
e227ceac | 2463 | struct iwl_lq_sta *lq_sta = priv_sta; |
bf403db8 | 2464 | struct iwl_priv *priv; |
b481de9c | 2465 | |
bf403db8 | 2466 | priv = (struct iwl_priv *)priv_rate; |
b481de9c | 2467 | IWL_DEBUG_RATE("enter\n"); |
c33104f0 | 2468 | kfree(lq_sta); |
b481de9c ZY |
2469 | IWL_DEBUG_RATE("leave\n"); |
2470 | } | |
2471 | ||
2472 | ||
93dc646a | 2473 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2474 | static int open_file_generic(struct inode *inode, struct file *file) |
2475 | { | |
2476 | file->private_data = inode->i_private; | |
2477 | return 0; | |
2478 | } | |
e227ceac TW |
2479 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2480 | u32 *rate_n_flags, int index) | |
98d7e09a | 2481 | { |
bf403db8 EK |
2482 | struct iwl_priv *priv; |
2483 | ||
2484 | priv = lq_sta->drv; | |
39e88504 GC |
2485 | if (lq_sta->dbg_fixed_rate) { |
2486 | if (index < 12) { | |
2487 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2488 | } else { | |
2489 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2490 | *rate_n_flags = 0x800D; | |
2491 | else | |
2492 | *rate_n_flags = 0x820A; | |
2493 | } | |
98d7e09a | 2494 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2495 | } else { |
2496 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2497 | } |
98d7e09a | 2498 | } |
5ae212c9 | 2499 | |
98d7e09a ZY |
2500 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2501 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2502 | { | |
e227ceac | 2503 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2504 | struct iwl_priv *priv; |
98d7e09a ZY |
2505 | char buf[64]; |
2506 | int buf_size; | |
2507 | u32 parsed_rate; | |
2508 | ||
bf403db8 | 2509 | priv = lq_sta->drv; |
98d7e09a ZY |
2510 | memset(buf, 0, sizeof(buf)); |
2511 | buf_size = min(count, sizeof(buf) - 1); | |
2512 | if (copy_from_user(buf, user_buf, buf_size)) | |
2513 | return -EFAULT; | |
2514 | ||
2515 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2516 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2517 | else |
39e88504 | 2518 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2519 | |
39e88504 GC |
2520 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2521 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2522 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2523 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2524 | |
2525 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2526 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2527 | |
39e88504 | 2528 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2529 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2530 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2531 | } |
2532 | ||
2533 | return count; | |
2534 | } | |
0209dc11 | 2535 | |
5ae212c9 ZY |
2536 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2537 | char __user *user_buf, size_t count, loff_t *ppos) | |
2538 | { | |
2539 | char buff[1024]; | |
2540 | int desc = 0; | |
2541 | int i = 0; | |
2542 | ||
e227ceac | 2543 | struct iwl_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2544 | |
c33104f0 | 2545 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2546 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2547 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2548 | lq_sta->active_legacy_rate); |
98d7e09a | 2549 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2550 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2551 | desc += sprintf(buff+desc, "general:" |
2552 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2553 | lq_sta->lq.general_params.flags, |
2554 | lq_sta->lq.general_params.mimo_delimiter, | |
2555 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2556 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2557 | |
2558 | desc += sprintf(buff+desc, "agg:" | |
2559 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2560 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2561 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2562 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2563 | |
2564 | desc += sprintf(buff+desc, | |
2565 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2566 | lq_sta->lq.general_params.start_rate_index[0], |
2567 | lq_sta->lq.general_params.start_rate_index[1], | |
2568 | lq_sta->lq.general_params.start_rate_index[2], | |
2569 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2570 | |
2571 | ||
2572 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2573 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2574 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2575 | |
2576 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2577 | } | |
2578 | ||
2579 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2580 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2581 | .read = rs_sta_dbgfs_scale_table_read, |
2582 | .open = open_file_generic, | |
2583 | }; | |
0209dc11 ZY |
2584 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2585 | char __user *user_buf, size_t count, loff_t *ppos) | |
2586 | { | |
2587 | char buff[1024]; | |
2588 | int desc = 0; | |
2589 | int i, j; | |
2590 | ||
e227ceac | 2591 | struct iwl_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2592 | for (i = 0; i < LQ_SIZE; i++) { |
2593 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2594 | "rate=0x%X\n", | |
c33104f0 TW |
2595 | lq_sta->active_tbl == i?"*":"x", |
2596 | lq_sta->lq_info[i].lq_type, | |
2597 | lq_sta->lq_info[i].is_SGI, | |
2598 | lq_sta->lq_info[i].is_fat, | |
2599 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2600 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2601 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2602 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2603 | "counter=%d success=%d %%=%d\n", |
2604 | lq_sta->lq_info[i].win[j].counter, | |
2605 | lq_sta->lq_info[i].win[j].success_counter, | |
2606 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2607 | } |
2608 | } | |
2609 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2610 | } | |
2611 | ||
2612 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2613 | .read = rs_sta_dbgfs_stats_table_read, | |
2614 | .open = open_file_generic, | |
2615 | }; | |
5ae212c9 | 2616 | |
93dc646a ZY |
2617 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2618 | struct dentry *dir) | |
2619 | { | |
e227ceac | 2620 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2621 | lq_sta->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 2622 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2623 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2624 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2625 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2626 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2627 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2628 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2629 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2630 | |
93dc646a ZY |
2631 | } |
2632 | ||
2633 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2634 | { | |
e227ceac | 2635 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2636 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2637 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2638 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2639 | } |
2640 | #endif | |
2641 | ||
b481de9c ZY |
2642 | static struct rate_control_ops rs_ops = { |
2643 | .module = NULL, | |
2644 | .name = RS_NAME, | |
2645 | .tx_status = rs_tx_status, | |
2646 | .get_rate = rs_get_rate, | |
2647 | .rate_init = rs_rate_init, | |
2648 | .clear = rs_clear, | |
2649 | .alloc = rs_alloc, | |
2650 | .free = rs_free, | |
2651 | .alloc_sta = rs_alloc_sta, | |
2652 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2653 | #ifdef CONFIG_MAC80211_DEBUGFS |
2654 | .add_sta_debugfs = rs_add_debugfs, | |
2655 | .remove_sta_debugfs = rs_remove_debugfs, | |
2656 | #endif | |
b481de9c ZY |
2657 | }; |
2658 | ||
e227ceac | 2659 | int iwlagn_rate_control_register(void) |
b481de9c | 2660 | { |
897e1cf2 | 2661 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2662 | } |
2663 | ||
e227ceac | 2664 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
2665 | { |
2666 | ieee80211_rate_control_unregister(&rs_ops); | |
2667 | } | |
2668 |