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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
01f8162a | 3 | * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved. |
b481de9c ZY |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
759ef89f | 22 | * Intel Linux Wireless <ilw@linux.intel.com> |
b481de9c ZY |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/wireless.h> | |
30 | #include <net/mac80211.h> | |
b481de9c ZY |
31 | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
3e0d4cb1 | 38 | #include "iwl-dev.h" |
be1f3ab6 | 39 | #include "iwl-sta.h" |
857485c0 | 40 | #include "iwl-core.h" |
b481de9c | 41 | |
e227ceac | 42 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 43 | |
aade00ce | 44 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
45 | #define IWL_NUMBER_TRY 1 |
46 | #define IWL_HT_NUMBER_TRY 3 | |
47 | ||
77626355 BC |
48 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
49 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
50 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
51 | ||
7d049e5a AM |
52 | /* max allowed rate miss before sync LQ cmd */ |
53 | #define IWL_MISSED_RATE_MAX 15 | |
77626355 BC |
54 | /* max time to accum history 2 seconds */ |
55 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) | |
b481de9c ZY |
56 | |
57 | static u8 rs_ht_to_legacy[] = { | |
58 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
62 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
63 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
64 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
65 | }; | |
66 | ||
aade00ce GC |
67 | static const u8 ant_toggle_lookup[] = { |
68 | /*ANT_NONE -> */ ANT_NONE, | |
69 | /*ANT_A -> */ ANT_B, | |
70 | /*ANT_B -> */ ANT_C, | |
71 | /*ANT_AB -> */ ANT_BC, | |
72 | /*ANT_C -> */ ANT_A, | |
73 | /*ANT_AC -> */ ANT_AB, | |
74 | /*ANT_BC -> */ ANT_AC, | |
75 | /*ANT_ABC -> */ ANT_ABC, | |
76 | }; | |
77 | ||
77626355 | 78 | /** |
e227ceac | 79 | * struct iwl_rate_scale_data -- tx success history for one rate |
77626355 | 80 | */ |
e227ceac | 81 | struct iwl_rate_scale_data { |
77626355 BC |
82 | u64 data; /* bitmap of successful frames */ |
83 | s32 success_counter; /* number of frames successful */ | |
84 | s32 success_ratio; /* per-cent * 128 */ | |
85 | s32 counter; /* number of frames attempted */ | |
86 | s32 average_tpt; /* success ratio * expected throughput */ | |
b481de9c ZY |
87 | unsigned long stamp; |
88 | }; | |
89 | ||
77626355 | 90 | /** |
e227ceac | 91 | * struct iwl_scale_tbl_info -- tx params and success history for all rates |
77626355 | 92 | * |
e227ceac | 93 | * There are two of these in struct iwl_lq_sta, |
77626355 BC |
94 | * one for "active", and one for "search". |
95 | */ | |
e227ceac | 96 | struct iwl_scale_tbl_info { |
fde0db31 GC |
97 | enum iwl_table_type lq_type; |
98 | u8 ant_type; | |
77626355 BC |
99 | u8 is_SGI; /* 1 = short guard interval */ |
100 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
101 | u8 is_dup; /* 1 = duplicated data streams */ | |
102 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
103 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
39e88504 | 104 | u32 current_rate; /* rate_n_flags, uCode API format */ |
e227ceac | 105 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
106 | }; |
107 | ||
e227ceac | 108 | struct iwl_traffic_load { |
0c11b4de RR |
109 | unsigned long time_stamp; /* age of the oldest statistics */ |
110 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
111 | * slice */ | |
112 | u32 total; /* total num of packets during the | |
113 | * last TID_MAX_TIME_DIFF */ | |
114 | u8 queue_count; /* number of queues that has | |
115 | * been used since the last cleanup */ | |
116 | u8 head; /* start of the circular buffer */ | |
117 | }; | |
118 | ||
77626355 | 119 | /** |
e227ceac | 120 | * struct iwl_lq_sta -- driver's rate scaling private structure |
77626355 BC |
121 | * |
122 | * Pointer to this gets passed back and forth between driver and mac80211. | |
123 | */ | |
e227ceac | 124 | struct iwl_lq_sta { |
77626355 BC |
125 | u8 active_tbl; /* index of active table, range 0-1 */ |
126 | u8 enable_counter; /* indicates HT mode */ | |
127 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
128 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 129 | s32 last_tpt; |
77626355 BC |
130 | |
131 | /* The following determine when to search for a new mode */ | |
b481de9c | 132 | u32 table_count_limit; |
77626355 BC |
133 | u32 max_failure_limit; /* # failed frames before new search */ |
134 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 135 | u32 table_count; |
77626355 BC |
136 | u32 total_failed; /* total failed frames, any/all rates */ |
137 | u32 total_success; /* total successful frames, any/all rates */ | |
138 | u32 flush_timer; /* time staying in mode before new search */ | |
139 | ||
140 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
141 | u8 is_green; |
142 | u8 is_dup; | |
8318d78a | 143 | enum ieee80211_band band; |
b481de9c | 144 | u8 ibss_sta_added; |
77626355 BC |
145 | |
146 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 147 | u32 supp_rates; |
39e88504 | 148 | u16 active_legacy_rate; |
b481de9c | 149 | u16 active_siso_rate; |
fde0db31 GC |
150 | u16 active_mimo2_rate; |
151 | u16 active_mimo3_rate; | |
b481de9c | 152 | u16 active_rate_basic; |
c6ec7a9b | 153 | s8 max_rate_idx; /* Max rate set by user */ |
7d049e5a | 154 | u8 missed_rate_counter; |
77626355 | 155 | |
66c73db7 | 156 | struct iwl_link_quality_cmd lq; |
e227ceac TW |
157 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
158 | struct iwl_traffic_load load[TID_MAX_LOAD_COUNT]; | |
0c11b4de | 159 | u8 tx_agg_tid_en; |
5ae212c9 | 160 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 161 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 162 | struct dentry *rs_sta_dbgfs_stats_table_file; |
0c11b4de | 163 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; |
39e88504 | 164 | u32 dbg_fixed_rate; |
5ae212c9 | 165 | #endif |
6243065d | 166 | struct iwl_priv *drv; |
b7e35008 JB |
167 | |
168 | /* used to be in sta_info */ | |
169 | int last_txrate_idx; | |
b481de9c ZY |
170 | }; |
171 | ||
c79dd5b5 | 172 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 173 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
174 | struct ieee80211_sta *sta, |
175 | struct iwl_lq_sta *lq_sta); | |
fde0db31 | 176 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 177 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
b481de9c ZY |
178 | |
179 | ||
98d7e09a | 180 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
181 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
182 | u32 *rate_n_flags, int index); | |
98d7e09a | 183 | #else |
e227ceac TW |
184 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
185 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
186 | {} |
187 | #endif | |
77626355 BC |
188 | |
189 | /* | |
190 | * Expected throughput metrics for following rates: | |
191 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
192 | * "G" is the only table that supports CCK (the first 4 rates). | |
193 | */ | |
a96a27f9 | 194 | /*FIXME:RS:need to separate tables for MIMO2/MIMO3*/ |
b481de9c ZY |
195 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
196 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
197 | }; | |
198 | ||
199 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
200 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
201 | }; | |
202 | ||
203 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
204 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
205 | }; | |
206 | ||
207 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
208 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
209 | }; | |
210 | ||
211 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
212 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
213 | }; | |
214 | ||
215 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
216 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
217 | }; | |
218 | ||
219 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
220 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
221 | }; | |
222 | ||
223 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
224 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
225 | }; | |
226 | ||
227 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
228 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
229 | }; | |
230 | ||
231 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
232 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
233 | }; | |
234 | ||
39e88504 | 235 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
236 | { |
237 | return (u8)(rate_n_flags & 0xFF); | |
238 | } | |
239 | ||
e227ceac | 240 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
241 | { |
242 | window->data = 0; | |
243 | window->success_counter = 0; | |
244 | window->success_ratio = IWL_INVALID_VALUE; | |
245 | window->counter = 0; | |
246 | window->average_tpt = IWL_INVALID_VALUE; | |
247 | window->stamp = 0; | |
b481de9c ZY |
248 | } |
249 | ||
aade00ce GC |
250 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
251 | { | |
3ac7f146 | 252 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
253 | } |
254 | ||
0c11b4de RR |
255 | /* |
256 | * removes the old data from the statistics. All data that is older than | |
257 | * TID_MAX_TIME_DIFF, will be deleted. | |
258 | */ | |
e227ceac | 259 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
260 | { |
261 | /* The oldest age we want to keep */ | |
262 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
263 | ||
264 | while (tl->queue_count && | |
265 | (tl->time_stamp < oldest_time)) { | |
266 | tl->total -= tl->packet_count[tl->head]; | |
267 | tl->packet_count[tl->head] = 0; | |
268 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
269 | tl->queue_count--; | |
270 | tl->head++; | |
271 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
272 | tl->head = 0; | |
273 | } | |
274 | } | |
275 | ||
276 | /* | |
277 | * increment traffic load value for tid and also remove | |
278 | * any old values if passed the certain time period | |
279 | */ | |
e227ceac | 280 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 281 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
282 | { |
283 | u32 curr_time = jiffies_to_msecs(jiffies); | |
284 | u32 time_diff; | |
285 | s32 index; | |
e227ceac | 286 | struct iwl_traffic_load *tl = NULL; |
54dbb525 | 287 | u8 tid; |
0c11b4de | 288 | |
417f114b | 289 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
fd7c8a40 | 290 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
54dbb525 TW |
291 | tid = qc[0] & 0xf; |
292 | } else | |
faa29718 | 293 | return MAX_TID_COUNT; |
0c11b4de RR |
294 | |
295 | tl = &lq_data->load[tid]; | |
296 | ||
297 | curr_time -= curr_time % TID_ROUND_VALUE; | |
298 | ||
299 | /* Happens only for the first packet. Initialize the data */ | |
300 | if (!(tl->queue_count)) { | |
301 | tl->total = 1; | |
302 | tl->time_stamp = curr_time; | |
303 | tl->queue_count = 1; | |
304 | tl->head = 0; | |
305 | tl->packet_count[0] = 1; | |
faa29718 | 306 | return MAX_TID_COUNT; |
0c11b4de RR |
307 | } |
308 | ||
309 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
310 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
311 | ||
312 | /* The history is too long: remove data that is older than */ | |
313 | /* TID_MAX_TIME_DIFF */ | |
314 | if (index >= TID_QUEUE_MAX_SIZE) | |
315 | rs_tl_rm_old_stats(tl, curr_time); | |
316 | ||
317 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
318 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
319 | tl->total = tl->total + 1; | |
320 | ||
321 | if ((index + 1) > tl->queue_count) | |
322 | tl->queue_count = index + 1; | |
faa29718 RR |
323 | |
324 | return tid; | |
0c11b4de RR |
325 | } |
326 | ||
327 | /* | |
328 | get the traffic load value for tid | |
329 | */ | |
e227ceac | 330 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
331 | { |
332 | u32 curr_time = jiffies_to_msecs(jiffies); | |
333 | u32 time_diff; | |
334 | s32 index; | |
e227ceac | 335 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
336 | |
337 | if (tid >= TID_MAX_LOAD_COUNT) | |
338 | return 0; | |
339 | ||
340 | tl = &(lq_data->load[tid]); | |
341 | ||
342 | curr_time -= curr_time % TID_ROUND_VALUE; | |
343 | ||
344 | if (!(tl->queue_count)) | |
345 | return 0; | |
346 | ||
347 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
348 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
349 | ||
350 | /* The history is too long: remove data that is older than */ | |
351 | /* TID_MAX_TIME_DIFF */ | |
352 | if (index >= TID_QUEUE_MAX_SIZE) | |
353 | rs_tl_rm_old_stats(tl, curr_time); | |
354 | ||
355 | return tl->total; | |
356 | } | |
357 | ||
c79dd5b5 | 358 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 359 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 360 | struct ieee80211_sta *sta) |
0c11b4de | 361 | { |
ff550cb4 | 362 | if (rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { |
e1623446 | 363 | IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
e174961c | 364 | sta->addr, tid); |
4b7679a5 | 365 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); |
0c11b4de RR |
366 | } |
367 | } | |
368 | ||
c79dd5b5 | 369 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 370 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 371 | struct ieee80211_sta *sta) |
0c11b4de RR |
372 | { |
373 | if ((tid < TID_MAX_LOAD_COUNT)) | |
374 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
375 | else if (tid == IWL_AGG_ALL_TID) | |
376 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
377 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
378 | } | |
379 | ||
39e88504 | 380 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 381 | { |
3ac7f146 TW |
382 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
383 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
384 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
385 | } |
386 | ||
77626355 BC |
387 | /** |
388 | * rs_collect_tx_data - Update the success/failure sliding window | |
389 | * | |
390 | * We keep a sliding window of the last 62 packets transmitted | |
391 | * at this rate. window->data contains the bitmask of successful | |
392 | * packets. | |
393 | */ | |
e227ceac | 394 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
99556438 RR |
395 | int scale_index, s32 tpt, int retries, |
396 | int successes) | |
b481de9c | 397 | { |
e227ceac | 398 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 399 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
400 | s32 fail_count; |
401 | ||
dc2453ae TW |
402 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
403 | return -EINVAL; | |
b481de9c | 404 | |
77626355 | 405 | /* Select data for current tx bit rate */ |
b481de9c ZY |
406 | window = &(windows[scale_index]); |
407 | ||
77626355 BC |
408 | /* |
409 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
410 | * history window; anything older isn't really relevant any more. | |
411 | * If we have filled up the sliding window, drop the oldest attempt; | |
412 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
413 | * subtract "1" from the success counter (this is the main reason | |
414 | * we keep these bitmaps!). | |
415 | */ | |
99556438 | 416 | while (retries > 0) { |
39e88504 GC |
417 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
418 | ||
419 | /* remove earliest */ | |
420 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
421 | ||
99556438 RR |
422 | if (window->data & mask) { |
423 | window->data &= ~mask; | |
39e88504 | 424 | window->success_counter--; |
99556438 | 425 | } |
b481de9c | 426 | } |
b481de9c | 427 | |
99556438 RR |
428 | /* Increment frames-attempted counter */ |
429 | window->counter++; | |
430 | ||
431 | /* Shift bitmap by one frame (throw away oldest history), | |
432 | * OR in "1", and increment "success" if this | |
433 | * frame was successful. */ | |
90d7795e | 434 | window->data <<= 1; |
99556438 | 435 | if (successes > 0) { |
39e88504 | 436 | window->success_counter++; |
99556438 RR |
437 | window->data |= 0x1; |
438 | successes--; | |
439 | } | |
77626355 | 440 | |
99556438 | 441 | retries--; |
b481de9c ZY |
442 | } |
443 | ||
77626355 | 444 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
445 | if (window->counter > 0) |
446 | window->success_ratio = 128 * (100 * window->success_counter) | |
447 | / window->counter; | |
448 | else | |
449 | window->success_ratio = IWL_INVALID_VALUE; | |
450 | ||
451 | fail_count = window->counter - window->success_counter; | |
452 | ||
77626355 | 453 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
454 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
455 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
456 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
457 | else | |
458 | window->average_tpt = IWL_INVALID_VALUE; | |
459 | ||
77626355 | 460 | /* Tag this window as having been updated */ |
b481de9c ZY |
461 | window->stamp = jiffies; |
462 | ||
dc2453ae | 463 | return 0; |
b481de9c ZY |
464 | } |
465 | ||
77626355 BC |
466 | /* |
467 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
468 | */ | |
39e88504 | 469 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
470 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
471 | struct iwl_scale_tbl_info *tbl, | |
472 | int index, u8 use_green) | |
b481de9c | 473 | { |
39e88504 GC |
474 | u32 rate_n_flags = 0; |
475 | ||
b481de9c | 476 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 477 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 478 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 479 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 480 | |
fde0db31 GC |
481 | } else if (is_Ht(tbl->lq_type)) { |
482 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 483 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 484 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 485 | } |
39e88504 | 486 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
487 | |
488 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 489 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 490 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 491 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 492 | else |
1826dcc0 | 493 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 494 | } else { |
978785a3 | 495 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
496 | } |
497 | ||
39e88504 | 498 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 499 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 500 | |
39e88504 GC |
501 | if (is_Ht(tbl->lq_type)) { |
502 | if (tbl->is_fat) { | |
503 | if (tbl->is_dup) | |
504 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
505 | else | |
506 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
507 | } | |
508 | if (tbl->is_SGI) | |
509 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
510 | ||
511 | if (use_green) { | |
512 | rate_n_flags |= RATE_MCS_GF_MSK; | |
513 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
514 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 515 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
516 | } |
517 | } | |
b481de9c | 518 | } |
39e88504 | 519 | return rate_n_flags; |
b481de9c ZY |
520 | } |
521 | ||
77626355 BC |
522 | /* |
523 | * Interpret uCode API's rate_n_flags format, | |
524 | * fill "search" or "active" tx mode table. | |
525 | */ | |
39e88504 | 526 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 527 | enum ieee80211_band band, |
e227ceac | 528 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
529 | int *rate_idx) |
530 | { | |
39e88504 GC |
531 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
532 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
533 | u8 mcs; | |
b481de9c | 534 | |
e7d326ac | 535 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 536 | |
fde0db31 | 537 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 538 | *rate_idx = -1; |
dc2453ae | 539 | return -EINVAL; |
b481de9c | 540 | } |
77626355 | 541 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
542 | tbl->is_fat = 0; |
543 | tbl->is_dup = 0; | |
fde0db31 GC |
544 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
545 | tbl->lq_type = LQ_NONE; | |
b481de9c | 546 | |
77626355 | 547 | /* legacy rate format */ |
39e88504 | 548 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 549 | if (num_of_ant == 1) { |
8318d78a | 550 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
551 | tbl->lq_type = LQ_A; |
552 | else | |
553 | tbl->lq_type = LQ_G; | |
b481de9c | 554 | } |
fde0db31 | 555 | /* HT rate format */ |
b481de9c | 556 | } else { |
39e88504 | 557 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
558 | tbl->is_SGI = 1; |
559 | ||
39e88504 GC |
560 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
561 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
562 | tbl->is_fat = 1; |
563 | ||
39e88504 | 564 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 565 | tbl->is_dup = 1; |
fde0db31 | 566 | |
39e88504 | 567 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 568 | |
39e88504 GC |
569 | /* SISO */ |
570 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
571 | if (num_of_ant == 1) |
572 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
573 | /* MIMO2 */ | |
39e88504 | 574 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
575 | if (num_of_ant == 2) |
576 | tbl->lq_type = LQ_MIMO2; | |
577 | /* MIMO3 */ | |
578 | } else { | |
579 | if (num_of_ant == 3) | |
580 | tbl->lq_type = LQ_MIMO3; | |
581 | } | |
b481de9c ZY |
582 | } |
583 | return 0; | |
584 | } | |
aade00ce GC |
585 | |
586 | /* switch to another antenna/antennas and return 1 */ | |
587 | /* if no other valid antenna found, return 0 */ | |
588 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 589 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 590 | { |
aade00ce GC |
591 | u8 new_ant_type; |
592 | ||
593 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
594 | return 0; | |
595 | ||
596 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
597 | return 0; | |
598 | ||
599 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
600 | ||
601 | while ((new_ant_type != tbl->ant_type) && | |
602 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
603 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
604 | ||
605 | if (new_ant_type == tbl->ant_type) | |
606 | return 0; | |
607 | ||
608 | tbl->ant_type = new_ant_type; | |
609 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
610 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
611 | return 1; | |
b481de9c ZY |
612 | } |
613 | ||
39e88504 | 614 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 615 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
616 | #if 0 |
617 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 618 | { |
3ac7f146 | 619 | return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
270243a5 | 620 | priv->current_ht_config.is_green_field && |
3ac7f146 | 621 | !priv->current_ht_config.non_GF_STA_present; |
f935a6da | 622 | } |
4f85f5b3 | 623 | #endif |
f935a6da GC |
624 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
625 | { | |
dc2453ae | 626 | return 0; |
b481de9c ZY |
627 | } |
628 | ||
629 | /** | |
630 | * rs_get_supported_rates - get the available rates | |
631 | * | |
632 | * if management frame or broadcast frame only return | |
633 | * basic available rates. | |
634 | * | |
635 | */ | |
e227ceac TW |
636 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
637 | struct ieee80211_hdr *hdr, | |
638 | enum iwl_table_type rate_type) | |
b481de9c | 639 | { |
eecd6e57 GC |
640 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
641 | lq_sta->active_rate_basic) | |
642 | return lq_sta->active_rate_basic; | |
643 | ||
644 | if (is_legacy(rate_type)) { | |
645 | return lq_sta->active_legacy_rate; | |
646 | } else { | |
b481de9c | 647 | if (is_siso(rate_type)) |
eecd6e57 | 648 | return lq_sta->active_siso_rate; |
fde0db31 | 649 | else if (is_mimo2(rate_type)) |
eecd6e57 | 650 | return lq_sta->active_mimo2_rate; |
b481de9c | 651 | else |
eecd6e57 | 652 | return lq_sta->active_mimo3_rate; |
c33104f0 | 653 | } |
b481de9c ZY |
654 | } |
655 | ||
bf403db8 EK |
656 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
657 | int rate_type) | |
b481de9c ZY |
658 | { |
659 | u8 high = IWL_RATE_INVALID; | |
660 | u8 low = IWL_RATE_INVALID; | |
661 | ||
01ebd063 | 662 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
663 | * the rate table */ |
664 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
665 | int i; | |
666 | u32 mask; | |
667 | ||
668 | /* Find the previous rate that is in the rate mask */ | |
669 | i = index - 1; | |
670 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
671 | if (rate_mask & mask) { | |
672 | low = i; | |
673 | break; | |
674 | } | |
675 | } | |
676 | ||
677 | /* Find the next rate that is in the rate mask */ | |
678 | i = index + 1; | |
679 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
680 | if (rate_mask & mask) { | |
681 | high = i; | |
682 | break; | |
683 | } | |
684 | } | |
685 | ||
686 | return (high << 8) | low; | |
687 | } | |
688 | ||
689 | low = index; | |
690 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 691 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
692 | if (low == IWL_RATE_INVALID) |
693 | break; | |
694 | if (rate_mask & (1 << low)) | |
695 | break; | |
e1623446 | 696 | IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
b481de9c ZY |
697 | } |
698 | ||
699 | high = index; | |
700 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 701 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
702 | if (high == IWL_RATE_INVALID) |
703 | break; | |
704 | if (rate_mask & (1 << high)) | |
705 | break; | |
e1623446 | 706 | IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
b481de9c ZY |
707 | } |
708 | ||
709 | return (high << 8) | low; | |
710 | } | |
711 | ||
e227ceac TW |
712 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
713 | struct iwl_scale_tbl_info *tbl, | |
714 | u8 scale_index, u8 ht_possible) | |
b481de9c | 715 | { |
b481de9c ZY |
716 | s32 low; |
717 | u16 rate_mask; | |
718 | u16 high_low; | |
719 | u8 switch_to_legacy = 0; | |
c33104f0 | 720 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
721 | |
722 | /* check if we need to switch from HT to legacy rates. | |
723 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
724 | * are always supported (spec demand) */ | |
725 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
726 | switch_to_legacy = 1; | |
727 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 728 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
729 | tbl->lq_type = LQ_A; |
730 | else | |
731 | tbl->lq_type = LQ_G; | |
732 | ||
69fdb309 | 733 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 734 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
735 | |
736 | tbl->is_fat = 0; | |
737 | tbl->is_SGI = 0; | |
738 | } | |
739 | ||
eecd6e57 | 740 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 741 | |
77626355 | 742 | /* Mask with station rate restriction */ |
b481de9c | 743 | if (is_legacy(tbl->lq_type)) { |
77626355 | 744 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 745 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 746 | rate_mask = (u16)(rate_mask & |
c33104f0 | 747 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 748 | else |
c33104f0 | 749 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
750 | } |
751 | ||
77626355 | 752 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 753 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
754 | low = scale_index; |
755 | goto out; | |
b481de9c ZY |
756 | } |
757 | ||
bf403db8 EK |
758 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
759 | tbl->lq_type); | |
b481de9c ZY |
760 | low = high_low & 0xff; |
761 | ||
39e88504 GC |
762 | if (low == IWL_RATE_INVALID) |
763 | low = scale_index; | |
764 | ||
765 | out: | |
978785a3 | 766 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
767 | } |
768 | ||
77626355 BC |
769 | /* |
770 | * mac80211 sends us Tx status | |
771 | */ | |
4b7679a5 JB |
772 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
773 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 774 | struct sk_buff *skb) |
b481de9c ZY |
775 | { |
776 | int status; | |
777 | u8 retries; | |
778 | int rs_index, index = 0; | |
417f114b | 779 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 780 | struct iwl_link_quality_cmd *table; |
b481de9c | 781 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 JB |
782 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
783 | struct ieee80211_hw *hw = priv->hw; | |
e039fa4a | 784 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac TW |
785 | struct iwl_rate_scale_data *window = NULL; |
786 | struct iwl_rate_scale_data *search_win = NULL; | |
39e88504 | 787 | u32 tx_rate; |
e227ceac TW |
788 | struct iwl_scale_tbl_info tbl_type; |
789 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c | 790 | u8 active_index = 0; |
b481de9c ZY |
791 | s32 tpt = 0; |
792 | ||
e1623446 | 793 | IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
b481de9c | 794 | |
417f114b TW |
795 | if (!ieee80211_is_data(hdr->frame_control) || |
796 | is_multicast_ether_addr(hdr->addr1)) | |
b481de9c ZY |
797 | return; |
798 | ||
99556438 | 799 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
800 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
801 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
802 | return; |
803 | ||
e6a9854b | 804 | retries = info->status.rates[0].count - 1; |
b481de9c ZY |
805 | |
806 | if (retries > 15) | |
807 | retries = 15; | |
808 | ||
05c914fe | 809 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 810 | !lq_sta->ibss_sta_added) |
f4d6082d | 811 | goto out; |
b481de9c | 812 | |
c33104f0 TW |
813 | table = &lq_sta->lq; |
814 | active_index = lq_sta->active_tbl; | |
b481de9c | 815 | |
c33104f0 TW |
816 | curr_tbl = &(lq_sta->lq_info[active_index]); |
817 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
e227ceac TW |
818 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
819 | search_win = (struct iwl_rate_scale_data *)&(search_tbl->win[0]); | |
b481de9c | 820 | |
77626355 BC |
821 | /* |
822 | * Ignore this Tx frame response if its initial rate doesn't match | |
823 | * that of latest Link Quality command. There may be stragglers | |
824 | * from a previous Link Quality command, but we're no longer interested | |
825 | * in those; they're either from the "active" mode while we're trying | |
826 | * to check "search" mode, or a prior "search" mode after we've moved | |
827 | * to a new "search" mode (which might become the new "active" mode). | |
828 | */ | |
39e88504 GC |
829 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
830 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
831 | if (priv->band == IEEE80211_BAND_5GHZ) |
832 | rs_index -= IWL_FIRST_OFDM_RATE; | |
833 | ||
e6a9854b JB |
834 | if ((info->status.rates[0].idx < 0) || |
835 | (tbl_type.is_SGI != !!(info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)) || | |
836 | (tbl_type.is_fat != !!(info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
837 | (tbl_type.is_dup != !!(info->status.rates[0].flags & IEEE80211_TX_RC_DUP_DATA)) || | |
838 | (tbl_type.ant_type != info->antenna_sel_tx) || | |
839 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) || | |
840 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
4c424e4c | 841 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e6a9854b | 842 | hw->wiphy->bands[info->band]->bitrates[info->status.rates[0].idx].bitrate)) { |
e1623446 | 843 | IWL_DEBUG_RATE(priv, "initial rate does not match 0x%x\n", tx_rate); |
d5e49036 MA |
844 | /* the last LQ command could failed so the LQ in ucode not |
845 | * the same in driver sync up | |
846 | */ | |
7d049e5a AM |
847 | lq_sta->missed_rate_counter++; |
848 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
849 | lq_sta->missed_rate_counter = 0; | |
850 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
851 | } | |
f4d6082d | 852 | goto out; |
b481de9c ZY |
853 | } |
854 | ||
7d049e5a | 855 | lq_sta->missed_rate_counter = 0; |
77626355 | 856 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 857 | while (retries) { |
77626355 BC |
858 | /* Look up the rate and other info used for each tx attempt. |
859 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
860 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
861 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
862 | &tbl_type, &rs_index); |
863 | ||
77626355 BC |
864 | /* If type matches "search" table, |
865 | * add failure to "search" history */ | |
b481de9c | 866 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 867 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
868 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
869 | if (search_tbl->expected_tpt) | |
870 | tpt = search_tbl->expected_tpt[rs_index]; | |
871 | else | |
872 | tpt = 0; | |
99556438 | 873 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
874 | |
875 | /* Else if type matches "current/active" table, | |
876 | * add failure to "current/active" history */ | |
b481de9c | 877 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 878 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
879 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
880 | if (curr_tbl->expected_tpt) | |
881 | tpt = curr_tbl->expected_tpt[rs_index]; | |
882 | else | |
883 | tpt = 0; | |
99556438 | 884 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 885 | } |
77626355 BC |
886 | |
887 | /* If not searching for a new mode, increment failed counter | |
888 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
889 | if (lq_sta->stay_in_tbl) |
890 | lq_sta->total_failed++; | |
b481de9c ZY |
891 | --retries; |
892 | index++; | |
893 | ||
894 | } | |
895 | ||
77626355 BC |
896 | /* |
897 | * Find (by rate) the history window to update with final Tx attempt; | |
898 | * if Tx was successful first try, use original rate, | |
899 | * else look up the rate that was, finally, successful. | |
900 | */ | |
39e88504 GC |
901 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
902 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 903 | |
77626355 | 904 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 905 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 906 | |
77626355 BC |
907 | /* If type matches "search" table, |
908 | * add final tx status to "search" history */ | |
b481de9c | 909 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 910 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
911 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
912 | if (search_tbl->expected_tpt) | |
913 | tpt = search_tbl->expected_tpt[rs_index]; | |
914 | else | |
915 | tpt = 0; | |
e039fa4a | 916 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 917 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
918 | info->status.ampdu_ack_len, |
919 | info->status.ampdu_ack_map); | |
99556438 RR |
920 | else |
921 | rs_collect_tx_data(search_win, rs_index, tpt, | |
922 | 1, status); | |
77626355 BC |
923 | /* Else if type matches "current/active" table, |
924 | * add final tx status to "current/active" history */ | |
b481de9c | 925 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 926 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
927 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
928 | if (curr_tbl->expected_tpt) | |
929 | tpt = curr_tbl->expected_tpt[rs_index]; | |
930 | else | |
931 | tpt = 0; | |
e039fa4a | 932 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 933 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
934 | info->status.ampdu_ack_len, |
935 | info->status.ampdu_ack_map); | |
99556438 RR |
936 | else |
937 | rs_collect_tx_data(window, rs_index, tpt, | |
938 | 1, status); | |
b481de9c ZY |
939 | } |
940 | ||
77626355 BC |
941 | /* If not searching for new mode, increment success/failed counter |
942 | * ... these help determine when to start searching again */ | |
c33104f0 | 943 | if (lq_sta->stay_in_tbl) { |
e039fa4a JB |
944 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
945 | lq_sta->total_success += info->status.ampdu_ack_map; | |
99556438 | 946 | lq_sta->total_failed += |
e039fa4a | 947 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
948 | } else { |
949 | if (status) | |
950 | lq_sta->total_success++; | |
951 | else | |
952 | lq_sta->total_failed++; | |
953 | } | |
b481de9c ZY |
954 | } |
955 | ||
77626355 | 956 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c AM |
957 | if (sta && sta->supp_rates[sband->band]) |
958 | rs_rate_scale_perform(priv, hdr, sta, lq_sta); | |
f4d6082d | 959 | out: |
b481de9c ZY |
960 | return; |
961 | } | |
962 | ||
77626355 BC |
963 | /* |
964 | * Begin a period of staying with a selected modulation mode. | |
965 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
966 | * Set frame tx success limits according to legacy vs. high-throughput, | |
967 | * and reset overall (spanning all rates) tx success history statistics. | |
968 | * These control how long we stay using same modulation mode before | |
969 | * searching for a new mode. | |
970 | */ | |
bf403db8 | 971 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 972 | struct iwl_lq_sta *lq_sta) |
b481de9c | 973 | { |
e1623446 | 974 | IWL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
c33104f0 | 975 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 976 | if (is_legacy) { |
c33104f0 TW |
977 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
978 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
979 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 980 | } else { |
c33104f0 TW |
981 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
982 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
983 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 984 | } |
c33104f0 TW |
985 | lq_sta->table_count = 0; |
986 | lq_sta->total_failed = 0; | |
987 | lq_sta->total_success = 0; | |
b481de9c ZY |
988 | } |
989 | ||
77626355 BC |
990 | /* |
991 | * Find correct throughput table for given mode of modulation | |
992 | */ | |
e227ceac TW |
993 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
994 | struct iwl_scale_tbl_info *tbl) | |
b481de9c ZY |
995 | { |
996 | if (is_legacy(tbl->lq_type)) { | |
997 | if (!is_a_band(tbl->lq_type)) | |
998 | tbl->expected_tpt = expected_tpt_G; | |
999 | else | |
1000 | tbl->expected_tpt = expected_tpt_A; | |
1001 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1002 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1003 | if (tbl->is_SGI) |
1004 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1005 | else | |
1006 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1007 | else if (tbl->is_SGI) | |
1008 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1009 | else | |
1010 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1011 | ||
fde0db31 | 1012 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1013 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1014 | if (tbl->is_SGI) |
1015 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1016 | else | |
1017 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1018 | else if (tbl->is_SGI) | |
1019 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1020 | else | |
1021 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1022 | } else | |
1023 | tbl->expected_tpt = expected_tpt_G; | |
1024 | } | |
1025 | ||
77626355 BC |
1026 | /* |
1027 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1028 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1029 | * above the current measured throughput of "active" mode, to give new mode | |
1030 | * a fair chance to prove itself without too many challenges. | |
1031 | * | |
1032 | * This gets called when transitioning to more aggressive modulation | |
1033 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1034 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1035 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1036 | * bit rate will typically need to increase, but not if performance was bad. | |
1037 | */ | |
c79dd5b5 | 1038 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1039 | struct iwl_lq_sta *lq_sta, |
1040 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1041 | u16 rate_mask, s8 index) |
b481de9c | 1042 | { |
77626355 | 1043 | /* "active" values */ |
e227ceac | 1044 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1045 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1046 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1047 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1048 | |
1049 | /* expected "search" throughput */ | |
1050 | s32 *tpt_tbl = tbl->expected_tpt; | |
1051 | ||
1052 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1053 | u16 high_low; |
f935a6da | 1054 | s8 rate = index; |
b481de9c ZY |
1055 | |
1056 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1057 | ||
1058 | for (; ;) { | |
bf403db8 EK |
1059 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1060 | tbl->lq_type); | |
b481de9c ZY |
1061 | |
1062 | low = high_low & 0xff; | |
1063 | high = (high_low >> 8) & 0xff; | |
1064 | ||
77626355 BC |
1065 | /* |
1066 | * Lower the "search" bit rate, to give new "search" mode | |
1067 | * approximately the same throughput as "active" if: | |
1068 | * | |
1069 | * 1) "Active" mode has been working modestly well (but not | |
1070 | * great), and expected "search" throughput (under perfect | |
1071 | * conditions) at candidate rate is above the actual | |
1072 | * measured "active" throughput (but less than expected | |
1073 | * "active" throughput under perfect conditions). | |
1074 | * OR | |
1075 | * 2) "Active" mode has been working perfectly or very well | |
1076 | * and expected "search" throughput (under perfect | |
1077 | * conditions) at candidate rate is above expected | |
1078 | * "active" throughput (under perfect conditions). | |
1079 | */ | |
c33104f0 | 1080 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1081 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1082 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1083 | (tpt_tbl[rate] <= active_tpt))) || | |
1084 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1085 | (tpt_tbl[rate] > active_tpt))) { | |
1086 | ||
77626355 BC |
1087 | /* (2nd or later pass) |
1088 | * If we've already tried to raise the rate, and are | |
1089 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1090 | if (start_hi != IWL_RATE_INVALID) { |
1091 | new_rate = start_hi; | |
1092 | break; | |
1093 | } | |
77626355 | 1094 | |
b481de9c | 1095 | new_rate = rate; |
77626355 BC |
1096 | |
1097 | /* Loop again with lower rate */ | |
b481de9c ZY |
1098 | if (low != IWL_RATE_INVALID) |
1099 | rate = low; | |
77626355 BC |
1100 | |
1101 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1102 | else |
1103 | break; | |
77626355 BC |
1104 | |
1105 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1106 | } else { |
77626355 BC |
1107 | /* (2nd or later pass) |
1108 | * If we've already tried to lower the rate, and are | |
1109 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1110 | if (new_rate != IWL_RATE_INVALID) |
1111 | break; | |
77626355 BC |
1112 | |
1113 | /* Loop again with higher rate */ | |
b481de9c ZY |
1114 | else if (high != IWL_RATE_INVALID) { |
1115 | start_hi = high; | |
1116 | rate = high; | |
77626355 BC |
1117 | |
1118 | /* Higher rate not available, use the original */ | |
b481de9c | 1119 | } else { |
90d7795e | 1120 | new_rate = rate; |
b481de9c ZY |
1121 | break; |
1122 | } | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | return new_rate; | |
1127 | } | |
b481de9c | 1128 | |
77626355 BC |
1129 | /* |
1130 | * Set up search table for MIMO | |
1131 | */ | |
fde0db31 | 1132 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1133 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1134 | struct ieee80211_conf *conf, |
4b7679a5 | 1135 | struct ieee80211_sta *sta, |
e227ceac | 1136 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1137 | { |
b481de9c ZY |
1138 | u16 rate_mask; |
1139 | s32 rate; | |
c33104f0 | 1140 | s8 is_green = lq_sta->is_green; |
b481de9c | 1141 | |
de27e64e | 1142 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1143 | return -1; |
1144 | ||
d9fe60de | 1145 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1146 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1147 | return -1; |
1148 | ||
77626355 | 1149 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1150 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1151 | return -1; |
1152 | ||
e1623446 | 1153 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1154 | |
1155 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1156 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1157 | tbl->action = 0; |
39e88504 GC |
1158 | rate_mask = lq_sta->active_mimo2_rate; |
1159 | ||
270243a5 | 1160 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1161 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1162 | tbl->is_fat = 1; |
1163 | else | |
1164 | tbl->is_fat = 0; | |
1165 | ||
39e88504 | 1166 | /* FIXME: - don't toggle SGI here |
b481de9c | 1167 | if (tbl->is_fat) { |
270243a5 | 1168 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1169 | tbl->is_SGI = 1; |
1170 | else | |
1171 | tbl->is_SGI = 0; | |
270243a5 | 1172 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1173 | tbl->is_SGI = 1; |
1174 | else | |
1175 | tbl->is_SGI = 0; | |
39e88504 | 1176 | */ |
b481de9c | 1177 | |
eecd6e57 | 1178 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1179 | |
f935a6da | 1180 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1181 | |
e1623446 | 1182 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1183 | |
1184 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
e1623446 | 1185 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
39e88504 | 1186 | rate, rate_mask); |
b481de9c | 1187 | return -1; |
39e88504 | 1188 | } |
978785a3 | 1189 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
b481de9c | 1190 | |
e1623446 | 1191 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1192 | tbl->current_rate, is_green); |
dc2453ae | 1193 | return 0; |
fde0db31 | 1194 | } |
b481de9c | 1195 | |
77626355 BC |
1196 | /* |
1197 | * Set up search table for SISO | |
1198 | */ | |
c79dd5b5 | 1199 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1200 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1201 | struct ieee80211_conf *conf, |
4b7679a5 | 1202 | struct ieee80211_sta *sta, |
e227ceac | 1203 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1204 | { |
b481de9c | 1205 | u16 rate_mask; |
c33104f0 | 1206 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1207 | s32 rate; |
1208 | ||
de27e64e | 1209 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1210 | return -1; |
1211 | ||
e1623446 | 1212 | IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n"); |
39e88504 | 1213 | |
c33104f0 | 1214 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1215 | tbl->lq_type = LQ_SISO; |
1216 | tbl->action = 0; | |
39e88504 | 1217 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1218 | |
270243a5 RR |
1219 | if (priv->current_ht_config.supported_chan_width |
1220 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1221 | tbl->is_fat = 1; |
1222 | else | |
1223 | tbl->is_fat = 0; | |
1224 | ||
39e88504 | 1225 | /* FIXME: - don't toggle SGI here |
b481de9c | 1226 | if (tbl->is_fat) { |
270243a5 | 1227 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1228 | tbl->is_SGI = 1; |
1229 | else | |
1230 | tbl->is_SGI = 0; | |
270243a5 | 1231 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1232 | tbl->is_SGI = 1; |
1233 | else | |
1234 | tbl->is_SGI = 0; | |
39e88504 | 1235 | */ |
b481de9c ZY |
1236 | |
1237 | if (is_green) | |
39e88504 | 1238 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1239 | |
eecd6e57 | 1240 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1241 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1242 | |
e1623446 | 1243 | IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1244 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1245 | IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1246 | rate, rate_mask); |
1247 | return -1; | |
1248 | } | |
978785a3 | 1249 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
e1623446 | 1250 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1251 | tbl->current_rate, is_green); |
403ab56b | 1252 | return 0; |
b481de9c ZY |
1253 | } |
1254 | ||
77626355 BC |
1255 | /* |
1256 | * Try to switch to new modulation mode from legacy | |
1257 | */ | |
c79dd5b5 | 1258 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1259 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1260 | struct ieee80211_conf *conf, |
4b7679a5 | 1261 | struct ieee80211_sta *sta, |
b481de9c ZY |
1262 | int index) |
1263 | { | |
e227ceac TW |
1264 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1265 | struct iwl_scale_tbl_info *search_tbl = | |
1266 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1267 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1268 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1269 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1270 | u8 start_action = tbl->action; |
fde0db31 | 1271 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1272 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1273 | int ret = 0; |
b481de9c ZY |
1274 | |
1275 | for (; ;) { | |
1276 | switch (tbl->action) { | |
3110bef7 GC |
1277 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1278 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
e1623446 | 1279 | IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
b481de9c | 1280 | |
c33104f0 | 1281 | lq_sta->action_counter++; |
77626355 | 1282 | |
3110bef7 GC |
1283 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1284 | tx_chains_num <= 1) || | |
1285 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1286 | tx_chains_num <= 2)) | |
1287 | break; | |
1288 | ||
77626355 | 1289 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1290 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1291 | break; | |
77626355 | 1292 | |
77626355 | 1293 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1294 | memcpy(search_tbl, tbl, sz); |
1295 | ||
aade00ce GC |
1296 | if (rs_toggle_antenna(valid_tx_ant, |
1297 | &search_tbl->current_rate, search_tbl)) { | |
3110bef7 | 1298 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1299 | goto out; |
1300 | } | |
a5e8b505 | 1301 | break; |
b481de9c | 1302 | case IWL_LEGACY_SWITCH_SISO: |
e1623446 | 1303 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
77626355 BC |
1304 | |
1305 | /* Set up search table to try SISO */ | |
b481de9c | 1306 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1307 | search_tbl->is_SGI = 0; |
c33104f0 | 1308 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1309 | search_tbl, index); |
dc2453ae | 1310 | if (!ret) { |
c33104f0 | 1311 | lq_sta->action_counter = 0; |
b481de9c | 1312 | goto out; |
dc2453ae | 1313 | } |
b481de9c ZY |
1314 | |
1315 | break; | |
3110bef7 GC |
1316 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1317 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1318 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
e1623446 | 1319 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1320 | |
1321 | /* Set up search table to try MIMO */ | |
b481de9c | 1322 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1323 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1324 | |
1325 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1326 | search_tbl->ant_type = ANT_AB; | |
1327 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1328 | search_tbl->ant_type = ANT_AC; | |
1329 | else | |
1330 | search_tbl->ant_type = ANT_BC; | |
1331 | ||
1332 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1333 | break; | |
1334 | ||
fde0db31 | 1335 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1336 | search_tbl, index); |
dc2453ae | 1337 | if (!ret) { |
c33104f0 | 1338 | lq_sta->action_counter = 0; |
b481de9c | 1339 | goto out; |
dc2453ae | 1340 | } |
b481de9c ZY |
1341 | break; |
1342 | } | |
1343 | tbl->action++; | |
3110bef7 GC |
1344 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1345 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1346 | |
1347 | if (tbl->action == start_action) | |
1348 | break; | |
1349 | ||
1350 | } | |
3110bef7 | 1351 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1352 | return 0; |
1353 | ||
3110bef7 GC |
1354 | out: |
1355 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1356 | tbl->action++; |
3110bef7 GC |
1357 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1358 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1359 | return 0; |
1360 | ||
1361 | } | |
1362 | ||
77626355 BC |
1363 | /* |
1364 | * Try to switch to new modulation mode from SISO | |
1365 | */ | |
c79dd5b5 | 1366 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1367 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1368 | struct ieee80211_conf *conf, |
4b7679a5 | 1369 | struct ieee80211_sta *sta, int index) |
b481de9c | 1370 | { |
c33104f0 | 1371 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1372 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1373 | struct iwl_scale_tbl_info *search_tbl = | |
1374 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1375 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1376 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1377 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1378 | u8 start_action = tbl->action; |
fde0db31 | 1379 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1380 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1381 | int ret; |
b481de9c ZY |
1382 | |
1383 | for (;;) { | |
c33104f0 | 1384 | lq_sta->action_counter++; |
b481de9c | 1385 | switch (tbl->action) { |
3110bef7 GC |
1386 | case IWL_SISO_SWITCH_ANTENNA1: |
1387 | case IWL_SISO_SWITCH_ANTENNA2: | |
e1623446 | 1388 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1389 | |
1390 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1391 | tx_chains_num <= 1) || | |
1392 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1393 | tx_chains_num <= 2)) | |
1394 | break; | |
1395 | ||
b481de9c ZY |
1396 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1397 | break; | |
b481de9c ZY |
1398 | |
1399 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1400 | if (rs_toggle_antenna(valid_tx_ant, |
3110bef7 | 1401 | &search_tbl->current_rate, search_tbl)) |
aade00ce | 1402 | goto out; |
a5e8b505 | 1403 | break; |
3110bef7 GC |
1404 | case IWL_SISO_SWITCH_MIMO2_AB: |
1405 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1406 | case IWL_SISO_SWITCH_MIMO2_BC: | |
e1623446 | 1407 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
b481de9c | 1408 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1409 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1410 | |
1411 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1412 | search_tbl->ant_type = ANT_AB; | |
1413 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1414 | search_tbl->ant_type = ANT_AC; | |
1415 | else | |
1416 | search_tbl->ant_type = ANT_BC; | |
1417 | ||
1418 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1419 | break; | |
1420 | ||
fde0db31 | 1421 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1422 | search_tbl, index); |
3110bef7 | 1423 | if (!ret) |
b481de9c ZY |
1424 | goto out; |
1425 | break; | |
1426 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1427 | if (!tbl->is_fat && |
1428 | !(priv->current_ht_config.sgf & | |
1429 | HT_SHORT_GI_20MHZ)) | |
1430 | break; | |
1431 | if (tbl->is_fat && | |
1432 | !(priv->current_ht_config.sgf & | |
1433 | HT_SHORT_GI_40MHZ)) | |
1434 | break; | |
1435 | ||
e1623446 | 1436 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1437 | |
b481de9c | 1438 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1439 | if (is_green) { |
1440 | if (!tbl->is_SGI) | |
1441 | break; | |
1442 | else | |
15b1687c WT |
1443 | IWL_ERR(priv, |
1444 | "SGI was set in GF+SISO\n"); | |
b481de9c | 1445 | } |
39e88504 | 1446 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1447 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1448 | if (tbl->is_SGI) { |
1449 | s32 tpt = lq_sta->last_tpt / 100; | |
1450 | if (tpt >= search_tbl->expected_tpt[index]) | |
1451 | break; | |
1452 | } | |
978785a3 TW |
1453 | search_tbl->current_rate = |
1454 | rate_n_flags_from_tbl(priv, search_tbl, | |
1455 | index, is_green); | |
b481de9c ZY |
1456 | goto out; |
1457 | } | |
1458 | tbl->action++; | |
1459 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1460 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1461 | |
1462 | if (tbl->action == start_action) | |
1463 | break; | |
1464 | } | |
3110bef7 | 1465 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1466 | return 0; |
1467 | ||
1468 | out: | |
3110bef7 | 1469 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1470 | tbl->action++; |
1471 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1472 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1473 | return 0; |
1474 | } | |
1475 | ||
77626355 BC |
1476 | /* |
1477 | * Try to switch to new modulation mode from MIMO | |
1478 | */ | |
c79dd5b5 | 1479 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
e227ceac | 1480 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1481 | struct ieee80211_conf *conf, |
4b7679a5 | 1482 | struct ieee80211_sta *sta, int index) |
b481de9c | 1483 | { |
c33104f0 | 1484 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1485 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1486 | struct iwl_scale_tbl_info *search_tbl = | |
1487 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1488 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
e227ceac TW |
1489 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1490 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1491 | u8 start_action = tbl->action; |
3110bef7 GC |
1492 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1493 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
aade00ce | 1494 | int ret; |
b481de9c ZY |
1495 | |
1496 | for (;;) { | |
c33104f0 | 1497 | lq_sta->action_counter++; |
b481de9c | 1498 | switch (tbl->action) { |
3110bef7 GC |
1499 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1500 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
e1623446 | 1501 | IWL_DEBUG_RATE(priv, "LQ: MIMO toggle Antennas\n"); |
3110bef7 GC |
1502 | |
1503 | if (tx_chains_num <= 2) | |
1504 | break; | |
1505 | ||
1506 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1507 | break; | |
1508 | ||
1509 | memcpy(search_tbl, tbl, sz); | |
1510 | if (rs_toggle_antenna(valid_tx_ant, | |
1511 | &search_tbl->current_rate, search_tbl)) | |
1512 | goto out; | |
1513 | break; | |
1514 | case IWL_MIMO2_SWITCH_SISO_A: | |
1515 | case IWL_MIMO2_SWITCH_SISO_B: | |
1516 | case IWL_MIMO2_SWITCH_SISO_C: | |
e1623446 | 1517 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1518 | |
77626355 | 1519 | /* Set up new search table for SISO */ |
b481de9c | 1520 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1521 | |
3110bef7 | 1522 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1523 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1524 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1525 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1526 | else |
1527 | search_tbl->ant_type = ANT_C; | |
1528 | ||
1529 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1530 | break; | |
b481de9c | 1531 | |
c33104f0 | 1532 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1533 | search_tbl, index); |
3110bef7 | 1534 | if (!ret) |
b481de9c | 1535 | goto out; |
3110bef7 | 1536 | |
b481de9c ZY |
1537 | break; |
1538 | ||
3110bef7 | 1539 | case IWL_MIMO2_SWITCH_GI: |
a9841013 EG |
1540 | if (!tbl->is_fat && |
1541 | !(priv->current_ht_config.sgf & | |
1542 | HT_SHORT_GI_20MHZ)) | |
1543 | break; | |
1544 | if (tbl->is_fat && | |
1545 | !(priv->current_ht_config.sgf & | |
1546 | HT_SHORT_GI_40MHZ)) | |
1547 | break; | |
1548 | ||
e1623446 | 1549 | IWL_DEBUG_RATE(priv, "LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1550 | |
1551 | /* Set up new search table for MIMO */ | |
b481de9c | 1552 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1553 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1554 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1555 | /* |
1556 | * If active table already uses the fastest possible | |
1557 | * modulation (dual stream with short guard interval), | |
1558 | * and it's working well, there's no need to look | |
1559 | * for a better type of modulation! | |
1560 | */ | |
39e88504 | 1561 | if (tbl->is_SGI) { |
c33104f0 | 1562 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1563 | if (tpt >= search_tbl->expected_tpt[index]) |
1564 | break; | |
b481de9c | 1565 | } |
978785a3 TW |
1566 | search_tbl->current_rate = |
1567 | rate_n_flags_from_tbl(priv, search_tbl, | |
1568 | index, is_green); | |
b481de9c ZY |
1569 | goto out; |
1570 | ||
1571 | } | |
1572 | tbl->action++; | |
3110bef7 GC |
1573 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1574 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1575 | |
1576 | if (tbl->action == start_action) | |
1577 | break; | |
1578 | } | |
3110bef7 | 1579 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1580 | return 0; |
1581 | out: | |
3110bef7 | 1582 | lq_sta->search_better_tbl = 1; |
b481de9c | 1583 | tbl->action++; |
3110bef7 GC |
1584 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1585 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1586 | return 0; |
1587 | ||
1588 | } | |
1589 | ||
77626355 BC |
1590 | /* |
1591 | * Check whether we should continue using same modulation mode, or | |
1592 | * begin search for a new mode, based on: | |
1593 | * 1) # tx successes or failures while using this mode | |
1594 | * 2) # times calling this function | |
1595 | * 3) elapsed time in this mode (not used, for now) | |
1596 | */ | |
e227ceac | 1597 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1598 | { |
e227ceac | 1599 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1600 | int i; |
1601 | int active_tbl; | |
1602 | int flush_interval_passed = 0; | |
bf403db8 | 1603 | struct iwl_priv *priv; |
b481de9c | 1604 | |
bf403db8 | 1605 | priv = lq_sta->drv; |
c33104f0 | 1606 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1607 | |
c33104f0 | 1608 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1609 | |
77626355 | 1610 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1611 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1612 | |
77626355 | 1613 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1614 | if (lq_sta->flush_timer) |
b481de9c ZY |
1615 | flush_interval_passed = |
1616 | time_after(jiffies, | |
c33104f0 | 1617 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1618 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1619 | ||
77626355 BC |
1620 | /* |
1621 | * Check if we should allow search for new modulation mode. | |
1622 | * If many frames have failed or succeeded, or we've used | |
1623 | * this same modulation for a long time, allow search, and | |
1624 | * reset history stats that keep track of whether we should | |
1625 | * allow a new search. Also (below) reset all bitmaps and | |
1626 | * stats in active history. | |
1627 | */ | |
c33104f0 TW |
1628 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1629 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1630 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1631 | && (flush_interval_passed))) { |
e1623446 | 1632 | IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1633 | lq_sta->total_failed, |
1634 | lq_sta->total_success, | |
b481de9c | 1635 | flush_interval_passed); |
77626355 BC |
1636 | |
1637 | /* Allow search for new mode */ | |
c33104f0 TW |
1638 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1639 | lq_sta->total_failed = 0; | |
1640 | lq_sta->total_success = 0; | |
1641 | lq_sta->flush_timer = 0; | |
77626355 BC |
1642 | |
1643 | /* | |
1644 | * Else if we've used this modulation mode enough repetitions | |
1645 | * (regardless of elapsed time or success/failure), reset | |
1646 | * history bitmaps and rate-specific stats for all rates in | |
1647 | * active table. | |
1648 | */ | |
403ab56b | 1649 | } else { |
c33104f0 TW |
1650 | lq_sta->table_count++; |
1651 | if (lq_sta->table_count >= | |
1652 | lq_sta->table_count_limit) { | |
1653 | lq_sta->table_count = 0; | |
b481de9c | 1654 | |
e1623446 | 1655 | IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
b481de9c ZY |
1656 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1657 | rs_rate_scale_clear_window( | |
1658 | &(tbl->win[i])); | |
1659 | } | |
1660 | } | |
1661 | ||
77626355 BC |
1662 | /* If transitioning to allow "search", reset all history |
1663 | * bitmaps and stats in active table (this will become the new | |
1664 | * "search" table). */ | |
c33104f0 | 1665 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1666 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1667 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1668 | } | |
1669 | } | |
1670 | } | |
1671 | ||
77626355 BC |
1672 | /* |
1673 | * Do rate scaling and search for new modulation mode. | |
1674 | */ | |
c79dd5b5 | 1675 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 1676 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
1677 | struct ieee80211_sta *sta, |
1678 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 1679 | { |
4b7679a5 | 1680 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 1681 | struct ieee80211_conf *conf = &hw->conf; |
b481de9c ZY |
1682 | int low = IWL_RATE_INVALID; |
1683 | int high = IWL_RATE_INVALID; | |
1684 | int index; | |
1685 | int i; | |
e227ceac | 1686 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1687 | int current_tpt = IWL_INVALID_VALUE; |
1688 | int low_tpt = IWL_INVALID_VALUE; | |
1689 | int high_tpt = IWL_INVALID_VALUE; | |
1690 | u32 fail_count; | |
1691 | s8 scale_action = 0; | |
fd7c8a40 | 1692 | u16 rate_mask; |
b481de9c | 1693 | u8 update_lq = 0; |
e227ceac | 1694 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1695 | u16 rate_scale_index_msk = 0; |
39e88504 | 1696 | u32 rate; |
b481de9c ZY |
1697 | u8 is_green = 0; |
1698 | u8 active_tbl = 0; | |
1699 | u8 done_search = 0; | |
1700 | u16 high_low; | |
a5e8b505 | 1701 | s32 sr; |
0c11b4de | 1702 | u8 tid = MAX_TID_COUNT; |
b481de9c | 1703 | |
e1623446 | 1704 | IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 1705 | |
417f114b TW |
1706 | /* Send management frames and broadcast/multicast data using |
1707 | * lowest rate. */ | |
1708 | /* TODO: this could probably be improved.. */ | |
1709 | if (!ieee80211_is_data(hdr->frame_control) || | |
1710 | is_multicast_ether_addr(hdr->addr1)) | |
b481de9c | 1711 | return; |
b481de9c | 1712 | |
4b7679a5 | 1713 | if (!sta || !lq_sta) |
b481de9c ZY |
1714 | return; |
1715 | ||
4b7679a5 | 1716 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1717 | |
faa29718 RR |
1718 | tid = rs_tl_add_packet(lq_sta, hdr); |
1719 | ||
77626355 BC |
1720 | /* |
1721 | * Select rate-scale / modulation-mode table to work with in | |
1722 | * the rest of this function: "search" if searching for better | |
1723 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1724 | */ | |
c33104f0 TW |
1725 | if (!lq_sta->search_better_tbl) |
1726 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1727 | else |
c33104f0 | 1728 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1729 | |
c33104f0 TW |
1730 | tbl = &(lq_sta->lq_info[active_tbl]); |
1731 | is_green = lq_sta->is_green; | |
b481de9c | 1732 | |
77626355 | 1733 | /* current tx rate */ |
b7e35008 | 1734 | index = lq_sta->last_txrate_idx; |
b481de9c | 1735 | |
e1623446 | 1736 | IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
b481de9c ZY |
1737 | tbl->lq_type); |
1738 | ||
77626355 | 1739 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1740 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c | 1741 | |
e1623446 | 1742 | IWL_DEBUG_RATE(priv, "mask 0x%04X \n", rate_mask); |
b481de9c ZY |
1743 | |
1744 | /* mask with station rate restriction */ | |
1745 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1746 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1747 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1748 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1749 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1750 | else |
1751 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1752 | lq_sta->supp_rates); |
b481de9c ZY |
1753 | |
1754 | } else | |
1755 | rate_scale_index_msk = rate_mask; | |
1756 | ||
1757 | if (!rate_scale_index_msk) | |
1758 | rate_scale_index_msk = rate_mask; | |
1759 | ||
07bc28ed | 1760 | if (!((1 << index) & rate_scale_index_msk)) { |
15b1687c | 1761 | IWL_ERR(priv, "Current Rate is not valid\n"); |
07bc28ed | 1762 | return; |
b481de9c ZY |
1763 | } |
1764 | ||
77626355 | 1765 | /* Get expected throughput table and history window for current rate */ |
07bc28ed | 1766 | if (!tbl->expected_tpt) { |
15b1687c | 1767 | IWL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
07bc28ed GC |
1768 | return; |
1769 | } | |
b481de9c | 1770 | |
c6ec7a9b AM |
1771 | /* force user max rate if set by user */ |
1772 | if ((lq_sta->max_rate_idx != -1) && | |
1773 | (lq_sta->max_rate_idx < index)) { | |
1774 | index = lq_sta->max_rate_idx; | |
1775 | update_lq = 1; | |
1776 | window = &(tbl->win[index]); | |
1777 | goto lq_update; | |
1778 | } | |
1779 | ||
b481de9c ZY |
1780 | window = &(tbl->win[index]); |
1781 | ||
77626355 BC |
1782 | /* |
1783 | * If there is not enough history to calculate actual average | |
1784 | * throughput, keep analyzing results of more tx frames, without | |
1785 | * changing rate or mode (bypass most of the rest of this function). | |
1786 | * Set up new rate table in uCode only if old rate is not supported | |
1787 | * in current association (use new rate found above). | |
1788 | */ | |
b481de9c | 1789 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1790 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1791 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
e1623446 | 1792 | IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
b481de9c ZY |
1793 | "for index %d\n", |
1794 | window->success_counter, window->counter, index); | |
77626355 BC |
1795 | |
1796 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1797 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1798 | |
1799 | /* Should we stay with this modulation mode, | |
1800 | * or search for a new one? */ | |
c33104f0 | 1801 | rs_stay_in_table(lq_sta); |
77626355 | 1802 | |
b481de9c | 1803 | goto out; |
3110bef7 | 1804 | } |
b481de9c | 1805 | |
77626355 BC |
1806 | /* Else we have enough samples; calculate estimate of |
1807 | * actual average throughput */ | |
3110bef7 GC |
1808 | |
1809 | BUG_ON(window->average_tpt != ((window->success_ratio * | |
1810 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 1811 | |
77626355 | 1812 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1813 | if (lq_sta->search_better_tbl) { |
b481de9c | 1814 | |
77626355 BC |
1815 | /* If good success, continue using the "search" mode; |
1816 | * no need to send new link quality command, since we're | |
1817 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1818 | if (window->average_tpt > lq_sta->last_tpt) { |
1819 | ||
e1623446 | 1820 | IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
1821 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1822 | window->success_ratio, | |
1823 | window->average_tpt, | |
1824 | lq_sta->last_tpt); | |
1825 | ||
1826 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1827 | lq_sta->enable_counter = 1; |
07bc28ed | 1828 | |
77626355 | 1829 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1830 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1831 | current_tpt = window->average_tpt; |
77626355 BC |
1832 | |
1833 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1834 | } else { |
07bc28ed | 1835 | |
e1623446 | 1836 | IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
07bc28ed GC |
1837 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1838 | window->success_ratio, | |
1839 | window->average_tpt, | |
1840 | lq_sta->last_tpt); | |
1841 | ||
77626355 | 1842 | /* Nullify "search" table */ |
b481de9c | 1843 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1844 | |
1845 | /* Revert to "active" table */ | |
c33104f0 TW |
1846 | active_tbl = lq_sta->active_tbl; |
1847 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1848 | |
77626355 | 1849 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 1850 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 1851 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1852 | |
77626355 | 1853 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1854 | update_lq = 1; |
b481de9c | 1855 | } |
77626355 BC |
1856 | |
1857 | /* Either way, we've made a decision; modulation mode | |
1858 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1859 | lq_sta->search_better_tbl = 0; |
77626355 | 1860 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1861 | goto lq_update; |
1862 | } | |
1863 | ||
77626355 BC |
1864 | /* (Else) not in search of better modulation mode, try for better |
1865 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1866 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1867 | tbl->lq_type); |
1868 | low = high_low & 0xff; | |
1869 | high = (high_low >> 8) & 0xff; | |
1870 | ||
c6ec7a9b AM |
1871 | /* If user set max rate, dont allow higher than user constrain */ |
1872 | if ((lq_sta->max_rate_idx != -1) && | |
1873 | (lq_sta->max_rate_idx < high)) | |
1874 | high = IWL_RATE_INVALID; | |
1875 | ||
a5e8b505 GC |
1876 | sr = window->success_ratio; |
1877 | ||
77626355 | 1878 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1879 | current_tpt = window->average_tpt; |
b481de9c ZY |
1880 | if (low != IWL_RATE_INVALID) |
1881 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1882 | if (high != IWL_RATE_INVALID) |
1883 | high_tpt = tbl->win[high].average_tpt; | |
1884 | ||
a5e8b505 | 1885 | scale_action = 0; |
b481de9c | 1886 | |
77626355 | 1887 | /* Too many failures, decrease rate */ |
a5e8b505 | 1888 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
e1623446 | 1889 | IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
b481de9c | 1890 | scale_action = -1; |
77626355 BC |
1891 | |
1892 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 1893 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
1894 | (high_tpt == IWL_INVALID_VALUE)) { |
1895 | ||
1896 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
1897 | scale_action = 1; | |
1898 | else if (low != IWL_RATE_INVALID) | |
1899 | scale_action = -1; | |
1900 | } | |
77626355 BC |
1901 | |
1902 | /* Both adjacent throughputs are measured, but neither one has better | |
1903 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1904 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1905 | (high_tpt != IWL_INVALID_VALUE) && | |
1906 | (low_tpt < current_tpt) && | |
1907 | (high_tpt < current_tpt)) | |
1908 | scale_action = 0; | |
77626355 BC |
1909 | |
1910 | /* At least one adjacent rate's throughput is measured, | |
1911 | * and may have better performance. */ | |
b481de9c | 1912 | else { |
77626355 | 1913 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1914 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1915 | /* Higher rate has better throughput */ |
a5e8b505 GC |
1916 | if (high_tpt > current_tpt && |
1917 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 1918 | scale_action = 1; |
a5e8b505 | 1919 | } else { |
e1623446 TW |
1920 | IWL_DEBUG_RATE(priv, |
1921 | "decrease rate because of high tpt\n"); | |
b481de9c ZY |
1922 | scale_action = -1; |
1923 | } | |
77626355 BC |
1924 | |
1925 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1926 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1927 | /* Lower rate has better throughput */ |
b481de9c | 1928 | if (low_tpt > current_tpt) { |
e1623446 TW |
1929 | IWL_DEBUG_RATE(priv, |
1930 | "decrease rate because of low tpt\n"); | |
b481de9c | 1931 | scale_action = -1; |
a5e8b505 | 1932 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 1933 | scale_action = 1; |
a5e8b505 | 1934 | } |
b481de9c ZY |
1935 | } |
1936 | } | |
1937 | ||
77626355 BC |
1938 | /* Sanity check; asked for decrease, but success rate or throughput |
1939 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
1940 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
1941 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 1942 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
1943 | scale_action = 0; |
1944 | ||
1945 | switch (scale_action) { | |
1946 | case -1: | |
77626355 | 1947 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1948 | if (low != IWL_RATE_INVALID) { |
1949 | update_lq = 1; | |
1950 | index = low; | |
1951 | } | |
1952 | break; | |
1953 | case 1: | |
77626355 | 1954 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1955 | if (high != IWL_RATE_INVALID) { |
1956 | update_lq = 1; | |
1957 | index = high; | |
1958 | } | |
1959 | ||
1960 | break; | |
1961 | case 0: | |
77626355 | 1962 | /* No change */ |
b481de9c ZY |
1963 | default: |
1964 | break; | |
1965 | } | |
1966 | ||
e1623446 | 1967 | IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
b481de9c ZY |
1968 | "high %d type %d\n", |
1969 | index, scale_action, low, high, tbl->lq_type); | |
1970 | ||
a5e8b505 | 1971 | lq_update: |
77626355 | 1972 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1973 | if (update_lq) { |
978785a3 | 1974 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
07bc28ed | 1975 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1976 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1977 | } |
77626355 BC |
1978 | |
1979 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1980 | rs_stay_in_table(lq_sta); |
b481de9c | 1981 | |
77626355 BC |
1982 | /* |
1983 | * Search for new modulation mode if we're: | |
1984 | * 1) Not changing rates right now | |
1985 | * 2) Not just finishing up a search | |
1986 | * 3) Allowing a new search | |
1987 | */ | |
47cfd463 | 1988 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 1989 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1990 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1991 | |
77626355 BC |
1992 | /* Select a new "search" modulation mode to try. |
1993 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1994 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1995 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1996 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1997 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1998 | else |
c33104f0 | 1999 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2000 | |
77626355 | 2001 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2002 | if (lq_sta->search_better_tbl) { |
77626355 | 2003 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2004 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2005 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2006 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2007 | ||
77626355 | 2008 | /* Use new "search" start rate */ |
e7d326ac | 2009 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2010 | |
e1623446 | 2011 | IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
39e88504 | 2012 | tbl->current_rate, index); |
07bc28ed | 2013 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 2014 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 2015 | } |
b481de9c | 2016 | |
77626355 BC |
2017 | /* If the "active" (non-search) mode was legacy, |
2018 | * and we've tried switching antennas, | |
2019 | * but we haven't been able to try HT modes (not available), | |
2020 | * stay with best antenna legacy modulation for a while | |
2021 | * before next round of mode comparisons. */ | |
c33104f0 | 2022 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
de27e64e | 2023 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && |
ae5eb026 | 2024 | lq_sta->action_counter >= 1) { |
c33104f0 | 2025 | lq_sta->action_counter = 0; |
e1623446 | 2026 | IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
bf403db8 | 2027 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2028 | } |
2029 | ||
77626355 BC |
2030 | /* If we're in an HT mode, and all 3 mode switch actions |
2031 | * have been tried and compared, stay in this best modulation | |
2032 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2033 | if (lq_sta->enable_counter && |
2034 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2035 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2036 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2037 | (tid != MAX_TID_COUNT)) { | |
e1623446 | 2038 | IWL_DEBUG_RATE(priv, "try to aggregate tid %d\n", tid); |
0c11b4de | 2039 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 2040 | } |
c33104f0 | 2041 | lq_sta->action_counter = 0; |
bf403db8 | 2042 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2043 | } |
77626355 BC |
2044 | |
2045 | /* | |
2046 | * Else, don't search for a new modulation mode. | |
2047 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2048 | * 1) Not changing rates right now | |
2049 | * 2) Not just finishing up a search | |
2050 | * 3) flush timer is empty | |
2051 | */ | |
b481de9c | 2052 | } else { |
c33104f0 TW |
2053 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2054 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2055 | } |
2056 | ||
2057 | out: | |
978785a3 | 2058 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
b481de9c | 2059 | i = index; |
b7e35008 | 2060 | lq_sta->last_txrate_idx = i; |
b481de9c | 2061 | |
b481de9c ZY |
2062 | return; |
2063 | } | |
2064 | ||
2065 | ||
c79dd5b5 | 2066 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2067 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2068 | struct ieee80211_sta *sta, |
2069 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2070 | { |
e227ceac | 2071 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2072 | int rate_idx; |
aade00ce | 2073 | int i; |
39e88504 | 2074 | u32 rate; |
aade00ce GC |
2075 | u8 use_green = rs_use_green(priv, conf); |
2076 | u8 active_tbl = 0; | |
2077 | u8 valid_tx_ant; | |
b481de9c | 2078 | |
4b7679a5 | 2079 | if (!sta || !lq_sta) |
b481de9c ZY |
2080 | goto out; |
2081 | ||
b7e35008 | 2082 | i = lq_sta->last_txrate_idx; |
b481de9c | 2083 | |
c33104f0 | 2084 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2085 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2086 | goto out; |
2087 | ||
aade00ce GC |
2088 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2089 | ||
c33104f0 TW |
2090 | if (!lq_sta->search_better_tbl) |
2091 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2092 | else |
c33104f0 | 2093 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2094 | |
c33104f0 | 2095 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2096 | |
2097 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2098 | i = 0; | |
2099 | ||
1826dcc0 | 2100 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2101 | tbl->ant_type = first_antenna(valid_tx_ant); |
2102 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2103 | |
2104 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2105 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2106 | |
39e88504 | 2107 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2108 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2109 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2110 | |
978785a3 | 2111 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2112 | tbl->current_rate = rate; |
eecd6e57 | 2113 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2114 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2115 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2116 | out: |
2117 | return; | |
2118 | } | |
2119 | ||
e6a9854b JB |
2120 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2121 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2122 | { |
2123 | ||
e6a9854b JB |
2124 | struct sk_buff *skb = txrc->skb; |
2125 | struct ieee80211_supported_band *sband = txrc->sband; | |
4b7679a5 JB |
2126 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2127 | struct ieee80211_conf *conf = &priv->hw->conf; | |
b481de9c | 2128 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e6a9854b | 2129 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2130 | struct iwl_lq_sta *lq_sta = priv_sta; |
2131 | int rate_idx; | |
c338ba3c | 2132 | u64 mask_bit = 0; |
b481de9c | 2133 | |
e1623446 | 2134 | IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2135 | |
c6ec7a9b AM |
2136 | /* Get max rate if user set max rate */ |
2137 | if (lq_sta) { | |
2138 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2139 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2140 | (lq_sta->max_rate_idx != -1)) | |
2141 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2142 | if ((lq_sta->max_rate_idx < 0) || | |
2143 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2144 | lq_sta->max_rate_idx = -1; | |
2145 | } | |
2146 | ||
c338ba3c AM |
2147 | if (sta) |
2148 | mask_bit = sta->supp_rates[sband->band]; | |
2149 | ||
2bc454b0 MW |
2150 | /* Send management frames and broadcast/multicast data using lowest |
2151 | * rate. */ | |
417f114b TW |
2152 | if (!ieee80211_is_data(hdr->frame_control) || |
2153 | is_multicast_ether_addr(hdr->addr1) || !sta || !lq_sta) { | |
c338ba3c AM |
2154 | if (!mask_bit) |
2155 | info->control.rates[0].idx = | |
2156 | rate_lowest_index(sband, NULL); | |
2157 | else | |
2158 | info->control.rates[0].idx = | |
2159 | rate_lowest_index(sband, sta); | |
4b7679a5 | 2160 | return; |
b481de9c ZY |
2161 | } |
2162 | ||
417f114b | 2163 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2164 | |
05c914fe | 2165 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2166 | !lq_sta->ibss_sta_added) { |
947b13a7 | 2167 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
b481de9c ZY |
2168 | |
2169 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2170 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", |
e174961c | 2171 | hdr->addr1); |
4f40e4d9 | 2172 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2173 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2174 | } |
2175 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2176 | lq_sta->lq.sta_id = sta_id; |
2177 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2178 | lq_sta->ibss_sta_added = 1; | |
4b7679a5 | 2179 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c | 2180 | } |
b481de9c ZY |
2181 | } |
2182 | ||
417f114b TW |
2183 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT) |
2184 | rate_idx = rate_lowest_index(sband, sta); | |
2185 | else if (sband->band == IEEE80211_BAND_5GHZ) | |
2186 | rate_idx -= IWL_FIRST_OFDM_RATE; | |
b481de9c | 2187 | |
417f114b | 2188 | info->control.rates[0].idx = rate_idx; |
b481de9c ZY |
2189 | } |
2190 | ||
4b7679a5 JB |
2191 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2192 | gfp_t gfp) | |
b481de9c | 2193 | { |
e227ceac | 2194 | struct iwl_lq_sta *lq_sta; |
bf403db8 | 2195 | struct iwl_priv *priv; |
b481de9c ZY |
2196 | int i, j; |
2197 | ||
bf403db8 | 2198 | priv = (struct iwl_priv *)priv_rate; |
e1623446 | 2199 | IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
b481de9c | 2200 | |
e227ceac | 2201 | lq_sta = kzalloc(sizeof(struct iwl_lq_sta), gfp); |
b481de9c | 2202 | |
c33104f0 | 2203 | if (lq_sta == NULL) |
b481de9c | 2204 | return NULL; |
c33104f0 | 2205 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2206 | |
63fddb9f | 2207 | |
b481de9c ZY |
2208 | for (j = 0; j < LQ_SIZE; j++) |
2209 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2210 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2211 | |
c33104f0 | 2212 | return lq_sta; |
b481de9c ZY |
2213 | } |
2214 | ||
4b7679a5 JB |
2215 | static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, |
2216 | struct ieee80211_sta *sta, void *priv_sta) | |
b481de9c ZY |
2217 | { |
2218 | int i, j; | |
4b7679a5 JB |
2219 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2220 | struct ieee80211_conf *conf = &priv->hw->conf; | |
e227ceac | 2221 | struct iwl_lq_sta *lq_sta = priv_sta; |
d5e49036 | 2222 | u16 mask_bit = 0; |
7d049e5a AM |
2223 | int count; |
2224 | int start_rate = 0; | |
b481de9c | 2225 | |
c33104f0 | 2226 | lq_sta->flush_timer = 0; |
4b7679a5 | 2227 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2228 | for (j = 0; j < LQ_SIZE; j++) |
2229 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2230 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2231 | |
e1623446 | 2232 | IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2233 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2234 | * the lowest or the highest rate.. Could consider using RSSI from | |
2235 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2236 | * after assoc.. */ | |
2237 | ||
c33104f0 | 2238 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2239 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
4b7679a5 | 2240 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 | 2241 | |
b481de9c | 2242 | /* for IBSS the call are from tasklet */ |
e1623446 | 2243 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
b481de9c ZY |
2244 | |
2245 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2246 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
4b7679a5 | 2247 | sta_id = iwl_add_station_flags(priv, sta->addr, |
67d62035 | 2248 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2249 | } |
2250 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2251 | lq_sta->lq.sta_id = sta_id; |
2252 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2253 | } |
2254 | /* FIXME: this is w/a remove it later */ | |
2255 | priv->assoc_station_added = 1; | |
2256 | } | |
2257 | ||
c33104f0 | 2258 | lq_sta->is_dup = 0; |
c6ec7a9b | 2259 | lq_sta->max_rate_idx = -1; |
7d049e5a | 2260 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; |
c33104f0 | 2261 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2262 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2263 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2264 | lq_sta->band = priv->band; |
77626355 BC |
2265 | /* |
2266 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2267 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2268 | */ | |
ae5eb026 JB |
2269 | lq_sta->active_siso_rate = sta->ht_cap.mcs.rx_mask[0] << 1; |
2270 | lq_sta->active_siso_rate |= sta->ht_cap.mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2271 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2272 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2273 | |
77626355 | 2274 | /* Same here */ |
ae5eb026 JB |
2275 | lq_sta->active_mimo2_rate = sta->ht_cap.mcs.rx_mask[1] << 1; |
2276 | lq_sta->active_mimo2_rate |= sta->ht_cap.mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2277 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2278 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2279 | ||
ae5eb026 JB |
2280 | lq_sta->active_mimo3_rate = sta->ht_cap.mcs.rx_mask[2] << 1; |
2281 | lq_sta->active_mimo3_rate |= sta->ht_cap.mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2282 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2283 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2284 | ||
e1623446 | 2285 | IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2286 | lq_sta->active_siso_rate, |
fde0db31 GC |
2287 | lq_sta->active_mimo2_rate, |
2288 | lq_sta->active_mimo3_rate); | |
2289 | ||
a96a27f9 | 2290 | /* These values will be overridden later */ |
07bc28ed GC |
2291 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; |
2292 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2293 | ||
0c11b4de RR |
2294 | /* as default allow aggregation for all tids */ |
2295 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2296 | lq_sta->drv = priv; |
b481de9c | 2297 | |
d5e49036 | 2298 | /* Find highest tx rate supported by hardware and destination station */ |
7d049e5a AM |
2299 | mask_bit = sta->supp_rates[sband->band]; |
2300 | count = sband->n_bitrates; | |
2301 | if (sband->band == IEEE80211_BAND_5GHZ) { | |
2302 | count += IWL_FIRST_OFDM_RATE; | |
2303 | start_rate = IWL_FIRST_OFDM_RATE; | |
2304 | mask_bit <<= IWL_FIRST_OFDM_RATE; | |
2305 | } | |
2306 | ||
2307 | mask_bit = mask_bit & lq_sta->active_legacy_rate; | |
2308 | lq_sta->last_txrate_idx = 4; | |
2309 | for (i = start_rate; i < count; i++) | |
d5e49036 MA |
2310 | if (mask_bit & BIT(i)) |
2311 | lq_sta->last_txrate_idx = i; | |
2312 | ||
4b7679a5 | 2313 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2314 | } |
2315 | ||
fde0db31 | 2316 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 2317 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2318 | { |
e227ceac | 2319 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2320 | int index = 0; |
b481de9c | 2321 | int rate_idx; |
1b696de2 | 2322 | int repeat_rate = 0; |
aade00ce | 2323 | u8 ant_toggle_cnt = 0; |
b481de9c | 2324 | u8 use_ht_possible = 1; |
aade00ce | 2325 | u8 valid_tx_ant = 0; |
07bc28ed | 2326 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2327 | |
77626355 | 2328 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2329 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2330 | |
39e88504 | 2331 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2332 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2333 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2334 | &tbl_type, &rate_idx); |
2335 | ||
77626355 | 2336 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2337 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2338 | ant_toggle_cnt = 1; |
1b696de2 | 2339 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2340 | } else { |
1b696de2 | 2341 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2342 | } |
b481de9c ZY |
2343 | |
2344 | lq_cmd->general_params.mimo_delimiter = | |
2345 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2346 | |
2347 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2348 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2349 | |
07bc28ed GC |
2350 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2351 | lq_cmd->general_params.single_stream_ant_msk = | |
2352 | tbl_type.ant_type; | |
2353 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2354 | lq_cmd->general_params.dual_stream_ant_msk = | |
2355 | tbl_type.ant_type; | |
2356 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2357 | |
2358 | index++; | |
1b696de2 | 2359 | repeat_rate--; |
b481de9c | 2360 | |
aade00ce GC |
2361 | if (priv) |
2362 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2363 | ||
77626355 | 2364 | /* Fill rest of rate table */ |
b481de9c | 2365 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2366 | /* Repeat initial/next rate. |
2367 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2368 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2369 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2370 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2371 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2372 | ant_toggle_cnt++; | |
2373 | else if (priv && | |
2374 | rs_toggle_antenna(valid_tx_ant, | |
2375 | &new_rate, &tbl_type)) | |
2376 | ant_toggle_cnt = 1; | |
2377 | } | |
98d7e09a | 2378 | |
77626355 | 2379 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2380 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2381 | |
2382 | /* Fill next table entry */ | |
b481de9c | 2383 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2384 | cpu_to_le32(new_rate); |
1b696de2 | 2385 | repeat_rate--; |
b481de9c ZY |
2386 | index++; |
2387 | } | |
2388 | ||
39e88504 | 2389 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2390 | &rate_idx); |
2391 | ||
77626355 BC |
2392 | /* Indicate to uCode which entries might be MIMO. |
2393 | * If initial rate was MIMO, this will finally end up | |
2394 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2395 | if (is_mimo(tbl_type.lq_type)) |
2396 | lq_cmd->general_params.mimo_delimiter = index; | |
2397 | ||
77626355 | 2398 | /* Get next rate */ |
39e88504 GC |
2399 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2400 | use_ht_possible); | |
b481de9c | 2401 | |
77626355 | 2402 | /* How many times should we repeat the next rate? */ |
b481de9c | 2403 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2404 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2405 | ant_toggle_cnt++; | |
2406 | else if (priv && | |
2407 | rs_toggle_antenna(valid_tx_ant, | |
2408 | &new_rate, &tbl_type)) | |
2409 | ant_toggle_cnt = 1; | |
2410 | ||
1b696de2 | 2411 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2412 | } else { |
1b696de2 | 2413 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2414 | } |
b481de9c | 2415 | |
77626355 BC |
2416 | /* Don't allow HT rates after next pass. |
2417 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2418 | use_ht_possible = 0; |
2419 | ||
77626355 | 2420 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2421 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2422 | |
2423 | /* Fill next table entry */ | |
39e88504 | 2424 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2425 | |
2426 | index++; | |
1b696de2 | 2427 | repeat_rate--; |
b481de9c ZY |
2428 | } |
2429 | ||
5e1dd8dc | 2430 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2431 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2432 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2433 | } |
2434 | ||
4b7679a5 | 2435 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2436 | { |
4b7679a5 | 2437 | return hw->priv; |
b481de9c ZY |
2438 | } |
2439 | /* rate scale requires free function to be implemented */ | |
2440 | static void rs_free(void *priv_rate) | |
2441 | { | |
2442 | return; | |
2443 | } | |
2444 | ||
4b7679a5 JB |
2445 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2446 | void *priv_sta) | |
b481de9c | 2447 | { |
e227ceac | 2448 | struct iwl_lq_sta *lq_sta = priv_sta; |
45527c2c | 2449 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c | 2450 | |
e1623446 | 2451 | IWL_DEBUG_RATE(priv, "enter\n"); |
c33104f0 | 2452 | kfree(lq_sta); |
e1623446 | 2453 | IWL_DEBUG_RATE(priv, "leave\n"); |
b481de9c ZY |
2454 | } |
2455 | ||
2456 | ||
93dc646a | 2457 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2458 | static int open_file_generic(struct inode *inode, struct file *file) |
2459 | { | |
2460 | file->private_data = inode->i_private; | |
2461 | return 0; | |
2462 | } | |
e227ceac TW |
2463 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2464 | u32 *rate_n_flags, int index) | |
98d7e09a | 2465 | { |
bf403db8 EK |
2466 | struct iwl_priv *priv; |
2467 | ||
2468 | priv = lq_sta->drv; | |
39e88504 GC |
2469 | if (lq_sta->dbg_fixed_rate) { |
2470 | if (index < 12) { | |
2471 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2472 | } else { | |
2473 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2474 | *rate_n_flags = 0x800D; | |
2475 | else | |
2476 | *rate_n_flags = 0x820A; | |
2477 | } | |
e1623446 | 2478 | IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
39e88504 | 2479 | } else { |
e1623446 | 2480 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
98d7e09a | 2481 | } |
98d7e09a | 2482 | } |
5ae212c9 | 2483 | |
98d7e09a ZY |
2484 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2485 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2486 | { | |
e227ceac | 2487 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2488 | struct iwl_priv *priv; |
98d7e09a ZY |
2489 | char buf[64]; |
2490 | int buf_size; | |
2491 | u32 parsed_rate; | |
2492 | ||
bf403db8 | 2493 | priv = lq_sta->drv; |
98d7e09a ZY |
2494 | memset(buf, 0, sizeof(buf)); |
2495 | buf_size = min(count, sizeof(buf) - 1); | |
2496 | if (copy_from_user(buf, user_buf, buf_size)) | |
2497 | return -EFAULT; | |
2498 | ||
2499 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2500 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2501 | else |
39e88504 | 2502 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2503 | |
39e88504 GC |
2504 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2505 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2506 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2507 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a | 2508 | |
e1623446 | 2509 | IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
39e88504 | 2510 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2511 | |
39e88504 | 2512 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2513 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2514 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2515 | } |
2516 | ||
2517 | return count; | |
2518 | } | |
0209dc11 | 2519 | |
5ae212c9 ZY |
2520 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2521 | char __user *user_buf, size_t count, loff_t *ppos) | |
2522 | { | |
2523 | char buff[1024]; | |
2524 | int desc = 0; | |
2525 | int i = 0; | |
2526 | ||
e227ceac | 2527 | struct iwl_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2528 | |
c33104f0 | 2529 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2530 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2531 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2532 | lq_sta->active_legacy_rate); |
98d7e09a | 2533 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2534 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2535 | desc += sprintf(buff+desc, "general:" |
2536 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2537 | lq_sta->lq.general_params.flags, |
2538 | lq_sta->lq.general_params.mimo_delimiter, | |
2539 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2540 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2541 | |
2542 | desc += sprintf(buff+desc, "agg:" | |
2543 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2544 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2545 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2546 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2547 | |
2548 | desc += sprintf(buff+desc, | |
2549 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2550 | lq_sta->lq.general_params.start_rate_index[0], |
2551 | lq_sta->lq.general_params.start_rate_index[1], | |
2552 | lq_sta->lq.general_params.start_rate_index[2], | |
2553 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2554 | |
2555 | ||
2556 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2557 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2558 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2559 | |
2560 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2561 | } | |
2562 | ||
2563 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2564 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2565 | .read = rs_sta_dbgfs_scale_table_read, |
2566 | .open = open_file_generic, | |
2567 | }; | |
0209dc11 ZY |
2568 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2569 | char __user *user_buf, size_t count, loff_t *ppos) | |
2570 | { | |
2571 | char buff[1024]; | |
2572 | int desc = 0; | |
2573 | int i, j; | |
2574 | ||
e227ceac | 2575 | struct iwl_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2576 | for (i = 0; i < LQ_SIZE; i++) { |
2577 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2578 | "rate=0x%X\n", | |
c3056065 | 2579 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
2580 | lq_sta->lq_info[i].lq_type, |
2581 | lq_sta->lq_info[i].is_SGI, | |
2582 | lq_sta->lq_info[i].is_fat, | |
2583 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2584 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2585 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2586 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2587 | "counter=%d success=%d %%=%d\n", |
2588 | lq_sta->lq_info[i].win[j].counter, | |
2589 | lq_sta->lq_info[i].win[j].success_counter, | |
2590 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2591 | } |
2592 | } | |
2593 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2594 | } | |
2595 | ||
2596 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2597 | .read = rs_sta_dbgfs_stats_table_read, | |
2598 | .open = open_file_generic, | |
2599 | }; | |
5ae212c9 | 2600 | |
93dc646a ZY |
2601 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2602 | struct dentry *dir) | |
2603 | { | |
e227ceac | 2604 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2605 | lq_sta->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 2606 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2607 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2608 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2609 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2610 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2611 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2612 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2613 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2614 | |
93dc646a ZY |
2615 | } |
2616 | ||
2617 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2618 | { | |
e227ceac | 2619 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2620 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2621 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2622 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2623 | } |
2624 | #endif | |
2625 | ||
b481de9c ZY |
2626 | static struct rate_control_ops rs_ops = { |
2627 | .module = NULL, | |
2628 | .name = RS_NAME, | |
2629 | .tx_status = rs_tx_status, | |
2630 | .get_rate = rs_get_rate, | |
2631 | .rate_init = rs_rate_init, | |
b481de9c ZY |
2632 | .alloc = rs_alloc, |
2633 | .free = rs_free, | |
2634 | .alloc_sta = rs_alloc_sta, | |
2635 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2636 | #ifdef CONFIG_MAC80211_DEBUGFS |
2637 | .add_sta_debugfs = rs_add_debugfs, | |
2638 | .remove_sta_debugfs = rs_remove_debugfs, | |
2639 | #endif | |
b481de9c ZY |
2640 | }; |
2641 | ||
e227ceac | 2642 | int iwlagn_rate_control_register(void) |
b481de9c | 2643 | { |
897e1cf2 | 2644 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2645 | } |
2646 | ||
e227ceac | 2647 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
2648 | { |
2649 | ieee80211_rate_control_unregister(&rs_ops); | |
2650 | } | |
2651 |