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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
eb7ae89c | 3 | * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved. |
b481de9c ZY |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * James P. Ketrenos <ipw2100-admin@linux.intel.com> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/wireless.h> | |
30 | #include <net/mac80211.h> | |
b481de9c ZY |
31 | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
2c8dccc7 | 38 | #include "../net/mac80211/rate.h" |
b481de9c | 39 | |
3e0d4cb1 | 40 | #include "iwl-dev.h" |
be1f3ab6 | 41 | #include "iwl-sta.h" |
857485c0 | 42 | #include "iwl-core.h" |
b481de9c ZY |
43 | #include "iwl-helpers.h" |
44 | ||
e227ceac | 45 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 46 | |
aade00ce | 47 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
48 | #define IWL_NUMBER_TRY 1 |
49 | #define IWL_HT_NUMBER_TRY 3 | |
50 | ||
77626355 BC |
51 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
52 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
53 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
54 | ||
55 | /* max time to accum history 2 seconds */ | |
56 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) | |
b481de9c ZY |
57 | |
58 | static u8 rs_ht_to_legacy[] = { | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, | |
62 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
63 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
64 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
65 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
66 | }; | |
67 | ||
aade00ce GC |
68 | static const u8 ant_toggle_lookup[] = { |
69 | /*ANT_NONE -> */ ANT_NONE, | |
70 | /*ANT_A -> */ ANT_B, | |
71 | /*ANT_B -> */ ANT_C, | |
72 | /*ANT_AB -> */ ANT_BC, | |
73 | /*ANT_C -> */ ANT_A, | |
74 | /*ANT_AC -> */ ANT_AB, | |
75 | /*ANT_BC -> */ ANT_AC, | |
76 | /*ANT_ABC -> */ ANT_ABC, | |
77 | }; | |
78 | ||
77626355 | 79 | /** |
e227ceac | 80 | * struct iwl_rate_scale_data -- tx success history for one rate |
77626355 | 81 | */ |
e227ceac | 82 | struct iwl_rate_scale_data { |
77626355 BC |
83 | u64 data; /* bitmap of successful frames */ |
84 | s32 success_counter; /* number of frames successful */ | |
85 | s32 success_ratio; /* per-cent * 128 */ | |
86 | s32 counter; /* number of frames attempted */ | |
87 | s32 average_tpt; /* success ratio * expected throughput */ | |
b481de9c ZY |
88 | unsigned long stamp; |
89 | }; | |
90 | ||
77626355 | 91 | /** |
e227ceac | 92 | * struct iwl_scale_tbl_info -- tx params and success history for all rates |
77626355 | 93 | * |
e227ceac | 94 | * There are two of these in struct iwl_lq_sta, |
77626355 BC |
95 | * one for "active", and one for "search". |
96 | */ | |
e227ceac | 97 | struct iwl_scale_tbl_info { |
fde0db31 GC |
98 | enum iwl_table_type lq_type; |
99 | u8 ant_type; | |
77626355 BC |
100 | u8 is_SGI; /* 1 = short guard interval */ |
101 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
102 | u8 is_dup; /* 1 = duplicated data streams */ | |
103 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
104 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
39e88504 | 105 | u32 current_rate; /* rate_n_flags, uCode API format */ |
e227ceac | 106 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
107 | }; |
108 | ||
e227ceac | 109 | struct iwl_traffic_load { |
0c11b4de RR |
110 | unsigned long time_stamp; /* age of the oldest statistics */ |
111 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
112 | * slice */ | |
113 | u32 total; /* total num of packets during the | |
114 | * last TID_MAX_TIME_DIFF */ | |
115 | u8 queue_count; /* number of queues that has | |
116 | * been used since the last cleanup */ | |
117 | u8 head; /* start of the circular buffer */ | |
118 | }; | |
119 | ||
77626355 | 120 | /** |
e227ceac | 121 | * struct iwl_lq_sta -- driver's rate scaling private structure |
77626355 BC |
122 | * |
123 | * Pointer to this gets passed back and forth between driver and mac80211. | |
124 | */ | |
e227ceac | 125 | struct iwl_lq_sta { |
77626355 BC |
126 | u8 active_tbl; /* index of active table, range 0-1 */ |
127 | u8 enable_counter; /* indicates HT mode */ | |
128 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
129 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 130 | s32 last_tpt; |
77626355 BC |
131 | |
132 | /* The following determine when to search for a new mode */ | |
b481de9c | 133 | u32 table_count_limit; |
77626355 BC |
134 | u32 max_failure_limit; /* # failed frames before new search */ |
135 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 136 | u32 table_count; |
77626355 BC |
137 | u32 total_failed; /* total failed frames, any/all rates */ |
138 | u32 total_success; /* total successful frames, any/all rates */ | |
139 | u32 flush_timer; /* time staying in mode before new search */ | |
140 | ||
141 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
142 | u8 is_green; |
143 | u8 is_dup; | |
8318d78a | 144 | enum ieee80211_band band; |
b481de9c | 145 | u8 ibss_sta_added; |
77626355 BC |
146 | |
147 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 148 | u32 supp_rates; |
39e88504 | 149 | u16 active_legacy_rate; |
b481de9c | 150 | u16 active_siso_rate; |
fde0db31 GC |
151 | u16 active_mimo2_rate; |
152 | u16 active_mimo3_rate; | |
b481de9c | 153 | u16 active_rate_basic; |
77626355 | 154 | |
66c73db7 | 155 | struct iwl_link_quality_cmd lq; |
e227ceac TW |
156 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
157 | struct iwl_traffic_load load[TID_MAX_LOAD_COUNT]; | |
0c11b4de | 158 | u8 tx_agg_tid_en; |
5ae212c9 | 159 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 160 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 161 | struct dentry *rs_sta_dbgfs_stats_table_file; |
0c11b4de | 162 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; |
39e88504 | 163 | u32 dbg_fixed_rate; |
5ae212c9 | 164 | #endif |
6243065d | 165 | struct iwl_priv *drv; |
b481de9c ZY |
166 | }; |
167 | ||
c79dd5b5 | 168 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
169 | struct net_device *dev, |
170 | struct ieee80211_hdr *hdr, | |
171 | struct sta_info *sta); | |
fde0db31 | 172 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 173 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
b481de9c ZY |
174 | |
175 | ||
98d7e09a | 176 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
177 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
178 | u32 *rate_n_flags, int index); | |
98d7e09a | 179 | #else |
e227ceac TW |
180 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
181 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
182 | {} |
183 | #endif | |
77626355 BC |
184 | |
185 | /* | |
186 | * Expected throughput metrics for following rates: | |
187 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
188 | * "G" is the only table that supports CCK (the first 4 rates). | |
189 | */ | |
fde0db31 | 190 | /*FIXME:RS:need to spearate tables for MIMO2/MIMO3*/ |
b481de9c ZY |
191 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
192 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
193 | }; | |
194 | ||
195 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
196 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
197 | }; | |
198 | ||
199 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
200 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
201 | }; | |
202 | ||
203 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
204 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
205 | }; | |
206 | ||
207 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
208 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
209 | }; | |
210 | ||
211 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
212 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
213 | }; | |
214 | ||
215 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
216 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
217 | }; | |
218 | ||
219 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
220 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
221 | }; | |
222 | ||
223 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
224 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
225 | }; | |
226 | ||
227 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
228 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
229 | }; | |
230 | ||
39e88504 | 231 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
232 | { |
233 | return (u8)(rate_n_flags & 0xFF); | |
234 | } | |
235 | ||
e227ceac | 236 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
237 | { |
238 | window->data = 0; | |
239 | window->success_counter = 0; | |
240 | window->success_ratio = IWL_INVALID_VALUE; | |
241 | window->counter = 0; | |
242 | window->average_tpt = IWL_INVALID_VALUE; | |
243 | window->stamp = 0; | |
b481de9c ZY |
244 | } |
245 | ||
aade00ce GC |
246 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
247 | { | |
3ac7f146 | 248 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
249 | } |
250 | ||
0c11b4de RR |
251 | /* |
252 | * removes the old data from the statistics. All data that is older than | |
253 | * TID_MAX_TIME_DIFF, will be deleted. | |
254 | */ | |
e227ceac | 255 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
256 | { |
257 | /* The oldest age we want to keep */ | |
258 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
259 | ||
260 | while (tl->queue_count && | |
261 | (tl->time_stamp < oldest_time)) { | |
262 | tl->total -= tl->packet_count[tl->head]; | |
263 | tl->packet_count[tl->head] = 0; | |
264 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
265 | tl->queue_count--; | |
266 | tl->head++; | |
267 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
268 | tl->head = 0; | |
269 | } | |
270 | } | |
271 | ||
272 | /* | |
273 | * increment traffic load value for tid and also remove | |
274 | * any old values if passed the certain time period | |
275 | */ | |
e227ceac | 276 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 277 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
278 | { |
279 | u32 curr_time = jiffies_to_msecs(jiffies); | |
280 | u32 time_diff; | |
281 | s32 index; | |
e227ceac | 282 | struct iwl_traffic_load *tl = NULL; |
fd7c8a40 | 283 | __le16 fc = hdr->frame_control; |
54dbb525 | 284 | u8 tid; |
0c11b4de | 285 | |
fd7c8a40 HH |
286 | if (ieee80211_is_data_qos(fc)) { |
287 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
54dbb525 TW |
288 | tid = qc[0] & 0xf; |
289 | } else | |
faa29718 | 290 | return MAX_TID_COUNT; |
0c11b4de RR |
291 | |
292 | tl = &lq_data->load[tid]; | |
293 | ||
294 | curr_time -= curr_time % TID_ROUND_VALUE; | |
295 | ||
296 | /* Happens only for the first packet. Initialize the data */ | |
297 | if (!(tl->queue_count)) { | |
298 | tl->total = 1; | |
299 | tl->time_stamp = curr_time; | |
300 | tl->queue_count = 1; | |
301 | tl->head = 0; | |
302 | tl->packet_count[0] = 1; | |
faa29718 | 303 | return MAX_TID_COUNT; |
0c11b4de RR |
304 | } |
305 | ||
306 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
307 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
308 | ||
309 | /* The history is too long: remove data that is older than */ | |
310 | /* TID_MAX_TIME_DIFF */ | |
311 | if (index >= TID_QUEUE_MAX_SIZE) | |
312 | rs_tl_rm_old_stats(tl, curr_time); | |
313 | ||
314 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
315 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
316 | tl->total = tl->total + 1; | |
317 | ||
318 | if ((index + 1) > tl->queue_count) | |
319 | tl->queue_count = index + 1; | |
faa29718 RR |
320 | |
321 | return tid; | |
0c11b4de RR |
322 | } |
323 | ||
324 | /* | |
325 | get the traffic load value for tid | |
326 | */ | |
e227ceac | 327 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
328 | { |
329 | u32 curr_time = jiffies_to_msecs(jiffies); | |
330 | u32 time_diff; | |
331 | s32 index; | |
e227ceac | 332 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
333 | |
334 | if (tid >= TID_MAX_LOAD_COUNT) | |
335 | return 0; | |
336 | ||
337 | tl = &(lq_data->load[tid]); | |
338 | ||
339 | curr_time -= curr_time % TID_ROUND_VALUE; | |
340 | ||
341 | if (!(tl->queue_count)) | |
342 | return 0; | |
343 | ||
344 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
345 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
346 | ||
347 | /* The history is too long: remove data that is older than */ | |
348 | /* TID_MAX_TIME_DIFF */ | |
349 | if (index >= TID_QUEUE_MAX_SIZE) | |
350 | rs_tl_rm_old_stats(tl, curr_time); | |
351 | ||
352 | return tl->total; | |
353 | } | |
354 | ||
c79dd5b5 | 355 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac TW |
356 | struct iwl_lq_sta *lq_data, u8 tid, |
357 | struct sta_info *sta) | |
0c11b4de RR |
358 | { |
359 | unsigned long state; | |
360 | DECLARE_MAC_BUF(mac); | |
361 | ||
07346f81 | 362 | spin_lock_bh(&sta->lock); |
cee24a3e | 363 | state = sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 364 | spin_unlock_bh(&sta->lock); |
0c11b4de RR |
365 | |
366 | if (state == HT_AGG_STATE_IDLE && | |
367 | rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { | |
368 | IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n", | |
369 | print_mac(mac, sta->addr), tid); | |
370 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); | |
371 | } | |
372 | } | |
373 | ||
c79dd5b5 | 374 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac TW |
375 | struct iwl_lq_sta *lq_data, |
376 | struct sta_info *sta) | |
0c11b4de RR |
377 | { |
378 | if ((tid < TID_MAX_LOAD_COUNT)) | |
379 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
380 | else if (tid == IWL_AGG_ALL_TID) | |
381 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
382 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
383 | } | |
384 | ||
39e88504 | 385 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 386 | { |
3ac7f146 TW |
387 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
388 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
389 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
390 | } |
391 | ||
77626355 BC |
392 | /** |
393 | * rs_collect_tx_data - Update the success/failure sliding window | |
394 | * | |
395 | * We keep a sliding window of the last 62 packets transmitted | |
396 | * at this rate. window->data contains the bitmask of successful | |
397 | * packets. | |
398 | */ | |
e227ceac | 399 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
99556438 RR |
400 | int scale_index, s32 tpt, int retries, |
401 | int successes) | |
b481de9c | 402 | { |
e227ceac | 403 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 404 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
405 | s32 fail_count; |
406 | ||
dc2453ae TW |
407 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
408 | return -EINVAL; | |
b481de9c | 409 | |
77626355 | 410 | /* Select data for current tx bit rate */ |
b481de9c ZY |
411 | window = &(windows[scale_index]); |
412 | ||
77626355 BC |
413 | /* |
414 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
415 | * history window; anything older isn't really relevant any more. | |
416 | * If we have filled up the sliding window, drop the oldest attempt; | |
417 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
418 | * subtract "1" from the success counter (this is the main reason | |
419 | * we keep these bitmaps!). | |
420 | */ | |
99556438 | 421 | while (retries > 0) { |
39e88504 GC |
422 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
423 | ||
424 | /* remove earliest */ | |
425 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
426 | ||
99556438 RR |
427 | if (window->data & mask) { |
428 | window->data &= ~mask; | |
39e88504 | 429 | window->success_counter--; |
99556438 | 430 | } |
b481de9c | 431 | } |
b481de9c | 432 | |
99556438 RR |
433 | /* Increment frames-attempted counter */ |
434 | window->counter++; | |
435 | ||
436 | /* Shift bitmap by one frame (throw away oldest history), | |
437 | * OR in "1", and increment "success" if this | |
438 | * frame was successful. */ | |
39e88504 | 439 | window->data <<= 1;; |
99556438 | 440 | if (successes > 0) { |
39e88504 | 441 | window->success_counter++; |
99556438 RR |
442 | window->data |= 0x1; |
443 | successes--; | |
444 | } | |
77626355 | 445 | |
99556438 | 446 | retries--; |
b481de9c ZY |
447 | } |
448 | ||
77626355 | 449 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
450 | if (window->counter > 0) |
451 | window->success_ratio = 128 * (100 * window->success_counter) | |
452 | / window->counter; | |
453 | else | |
454 | window->success_ratio = IWL_INVALID_VALUE; | |
455 | ||
456 | fail_count = window->counter - window->success_counter; | |
457 | ||
77626355 | 458 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
459 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
460 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
461 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
462 | else | |
463 | window->average_tpt = IWL_INVALID_VALUE; | |
464 | ||
77626355 | 465 | /* Tag this window as having been updated */ |
b481de9c ZY |
466 | window->stamp = jiffies; |
467 | ||
dc2453ae | 468 | return 0; |
b481de9c ZY |
469 | } |
470 | ||
77626355 BC |
471 | /* |
472 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
473 | */ | |
39e88504 | 474 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
e227ceac | 475 | static u32 rate_n_flags_from_tbl(struct iwl_scale_tbl_info *tbl, |
39e88504 | 476 | int index, u8 use_green) |
b481de9c | 477 | { |
39e88504 GC |
478 | u32 rate_n_flags = 0; |
479 | ||
b481de9c | 480 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 481 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 482 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 483 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 484 | |
fde0db31 GC |
485 | } else if (is_Ht(tbl->lq_type)) { |
486 | if (index > IWL_LAST_OFDM_RATE) { | |
487 | IWL_ERROR("invalid HT rate index %d\n", index); | |
b481de9c | 488 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 489 | } |
39e88504 | 490 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
491 | |
492 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 493 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 494 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 495 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 496 | else |
1826dcc0 | 497 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 498 | } else { |
fde0db31 | 499 | IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
500 | } |
501 | ||
39e88504 | 502 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 503 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 504 | |
39e88504 GC |
505 | if (is_Ht(tbl->lq_type)) { |
506 | if (tbl->is_fat) { | |
507 | if (tbl->is_dup) | |
508 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
509 | else | |
510 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
511 | } | |
512 | if (tbl->is_SGI) | |
513 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
514 | ||
515 | if (use_green) { | |
516 | rate_n_flags |= RATE_MCS_GF_MSK; | |
517 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
518 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
519 | IWL_ERROR("GF was set with SGI:SISO\n"); | |
520 | } | |
521 | } | |
b481de9c | 522 | } |
39e88504 | 523 | return rate_n_flags; |
b481de9c ZY |
524 | } |
525 | ||
77626355 BC |
526 | /* |
527 | * Interpret uCode API's rate_n_flags format, | |
528 | * fill "search" or "active" tx mode table. | |
529 | */ | |
39e88504 | 530 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 531 | enum ieee80211_band band, |
e227ceac | 532 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
533 | int *rate_idx) |
534 | { | |
39e88504 GC |
535 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
536 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
537 | u8 mcs; | |
b481de9c | 538 | |
e7d326ac | 539 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 540 | |
fde0db31 | 541 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 542 | *rate_idx = -1; |
dc2453ae | 543 | return -EINVAL; |
b481de9c | 544 | } |
77626355 | 545 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
546 | tbl->is_fat = 0; |
547 | tbl->is_dup = 0; | |
fde0db31 GC |
548 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
549 | tbl->lq_type = LQ_NONE; | |
b481de9c | 550 | |
77626355 | 551 | /* legacy rate format */ |
39e88504 | 552 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 553 | if (num_of_ant == 1) { |
8318d78a | 554 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
555 | tbl->lq_type = LQ_A; |
556 | else | |
557 | tbl->lq_type = LQ_G; | |
b481de9c | 558 | } |
fde0db31 | 559 | /* HT rate format */ |
b481de9c | 560 | } else { |
39e88504 | 561 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
562 | tbl->is_SGI = 1; |
563 | ||
39e88504 GC |
564 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
565 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
566 | tbl->is_fat = 1; |
567 | ||
39e88504 | 568 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 569 | tbl->is_dup = 1; |
fde0db31 | 570 | |
39e88504 | 571 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 572 | |
39e88504 GC |
573 | /* SISO */ |
574 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
575 | if (num_of_ant == 1) |
576 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
577 | /* MIMO2 */ | |
39e88504 | 578 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
579 | if (num_of_ant == 2) |
580 | tbl->lq_type = LQ_MIMO2; | |
581 | /* MIMO3 */ | |
582 | } else { | |
583 | if (num_of_ant == 3) | |
584 | tbl->lq_type = LQ_MIMO3; | |
585 | } | |
b481de9c ZY |
586 | } |
587 | return 0; | |
588 | } | |
aade00ce GC |
589 | |
590 | /* switch to another antenna/antennas and return 1 */ | |
591 | /* if no other valid antenna found, return 0 */ | |
592 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 593 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 594 | { |
aade00ce GC |
595 | u8 new_ant_type; |
596 | ||
597 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
598 | return 0; | |
599 | ||
600 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
601 | return 0; | |
602 | ||
603 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
604 | ||
605 | while ((new_ant_type != tbl->ant_type) && | |
606 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
607 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
608 | ||
609 | if (new_ant_type == tbl->ant_type) | |
610 | return 0; | |
611 | ||
612 | tbl->ant_type = new_ant_type; | |
613 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
614 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
615 | return 1; | |
b481de9c ZY |
616 | } |
617 | ||
39e88504 | 618 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 619 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
620 | #if 0 |
621 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 622 | { |
3ac7f146 | 623 | return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
270243a5 | 624 | priv->current_ht_config.is_green_field && |
3ac7f146 | 625 | !priv->current_ht_config.non_GF_STA_present; |
f935a6da | 626 | } |
4f85f5b3 | 627 | #endif |
f935a6da GC |
628 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
629 | { | |
dc2453ae | 630 | return 0; |
b481de9c ZY |
631 | } |
632 | ||
633 | /** | |
634 | * rs_get_supported_rates - get the available rates | |
635 | * | |
636 | * if management frame or broadcast frame only return | |
637 | * basic available rates. | |
638 | * | |
639 | */ | |
e227ceac TW |
640 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
641 | struct ieee80211_hdr *hdr, | |
642 | enum iwl_table_type rate_type) | |
b481de9c | 643 | { |
eecd6e57 GC |
644 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
645 | lq_sta->active_rate_basic) | |
646 | return lq_sta->active_rate_basic; | |
647 | ||
648 | if (is_legacy(rate_type)) { | |
649 | return lq_sta->active_legacy_rate; | |
650 | } else { | |
b481de9c | 651 | if (is_siso(rate_type)) |
eecd6e57 | 652 | return lq_sta->active_siso_rate; |
fde0db31 | 653 | else if (is_mimo2(rate_type)) |
eecd6e57 | 654 | return lq_sta->active_mimo2_rate; |
b481de9c | 655 | else |
eecd6e57 | 656 | return lq_sta->active_mimo3_rate; |
c33104f0 | 657 | } |
b481de9c ZY |
658 | } |
659 | ||
bf403db8 EK |
660 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
661 | int rate_type) | |
b481de9c ZY |
662 | { |
663 | u8 high = IWL_RATE_INVALID; | |
664 | u8 low = IWL_RATE_INVALID; | |
665 | ||
01ebd063 | 666 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
667 | * the rate table */ |
668 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
669 | int i; | |
670 | u32 mask; | |
671 | ||
672 | /* Find the previous rate that is in the rate mask */ | |
673 | i = index - 1; | |
674 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
675 | if (rate_mask & mask) { | |
676 | low = i; | |
677 | break; | |
678 | } | |
679 | } | |
680 | ||
681 | /* Find the next rate that is in the rate mask */ | |
682 | i = index + 1; | |
683 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
684 | if (rate_mask & mask) { | |
685 | high = i; | |
686 | break; | |
687 | } | |
688 | } | |
689 | ||
690 | return (high << 8) | low; | |
691 | } | |
692 | ||
693 | low = index; | |
694 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 695 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
696 | if (low == IWL_RATE_INVALID) |
697 | break; | |
698 | if (rate_mask & (1 << low)) | |
699 | break; | |
700 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
701 | } | |
702 | ||
703 | high = index; | |
704 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 705 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
706 | if (high == IWL_RATE_INVALID) |
707 | break; | |
708 | if (rate_mask & (1 << high)) | |
709 | break; | |
710 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
711 | } | |
712 | ||
713 | return (high << 8) | low; | |
714 | } | |
715 | ||
e227ceac TW |
716 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
717 | struct iwl_scale_tbl_info *tbl, | |
718 | u8 scale_index, u8 ht_possible) | |
b481de9c | 719 | { |
b481de9c ZY |
720 | s32 low; |
721 | u16 rate_mask; | |
722 | u16 high_low; | |
723 | u8 switch_to_legacy = 0; | |
c33104f0 | 724 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
725 | |
726 | /* check if we need to switch from HT to legacy rates. | |
727 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
728 | * are always supported (spec demand) */ | |
729 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
730 | switch_to_legacy = 1; | |
731 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 732 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
733 | tbl->lq_type = LQ_A; |
734 | else | |
735 | tbl->lq_type = LQ_G; | |
736 | ||
69fdb309 | 737 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 738 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
739 | |
740 | tbl->is_fat = 0; | |
741 | tbl->is_SGI = 0; | |
742 | } | |
743 | ||
eecd6e57 | 744 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 745 | |
77626355 | 746 | /* Mask with station rate restriction */ |
b481de9c | 747 | if (is_legacy(tbl->lq_type)) { |
77626355 | 748 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 749 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 750 | rate_mask = (u16)(rate_mask & |
c33104f0 | 751 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 752 | else |
c33104f0 | 753 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
754 | } |
755 | ||
77626355 | 756 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 757 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
758 | low = scale_index; |
759 | goto out; | |
b481de9c ZY |
760 | } |
761 | ||
bf403db8 EK |
762 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
763 | tbl->lq_type); | |
b481de9c ZY |
764 | low = high_low & 0xff; |
765 | ||
39e88504 GC |
766 | if (low == IWL_RATE_INVALID) |
767 | low = scale_index; | |
768 | ||
769 | out: | |
770 | return rate_n_flags_from_tbl(tbl, low, is_green); | |
b481de9c ZY |
771 | } |
772 | ||
77626355 BC |
773 | /* |
774 | * mac80211 sends us Tx status | |
775 | */ | |
c33104f0 | 776 | static void rs_tx_status(void *priv_rate, struct net_device *dev, |
e039fa4a | 777 | struct sk_buff *skb) |
b481de9c ZY |
778 | { |
779 | int status; | |
780 | u8 retries; | |
781 | int rs_index, index = 0; | |
e227ceac | 782 | struct iwl_lq_sta *lq_sta; |
66c73db7 | 783 | struct iwl_link_quality_cmd *table; |
b481de9c ZY |
784 | struct sta_info *sta; |
785 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
c79dd5b5 | 786 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
b481de9c | 787 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
4c424e4c | 788 | struct ieee80211_hw *hw = local_to_hw(local); |
e039fa4a | 789 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac TW |
790 | struct iwl_rate_scale_data *window = NULL; |
791 | struct iwl_rate_scale_data *search_win = NULL; | |
39e88504 | 792 | u32 tx_rate; |
e227ceac TW |
793 | struct iwl_scale_tbl_info tbl_type; |
794 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c | 795 | u8 active_index = 0; |
fd7c8a40 | 796 | __le16 fc = hdr->frame_control; |
b481de9c ZY |
797 | s32 tpt = 0; |
798 | ||
58826351 | 799 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
800 | |
801 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
802 | return; | |
803 | ||
99556438 | 804 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
805 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
806 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
807 | return; |
808 | ||
e039fa4a | 809 | retries = info->status.retry_count; |
b481de9c ZY |
810 | |
811 | if (retries > 15) | |
812 | retries = 15; | |
813 | ||
d0709a65 | 814 | rcu_read_lock(); |
b481de9c ZY |
815 | |
816 | sta = sta_info_get(local, hdr->addr1); | |
817 | ||
f4d6082d TW |
818 | if (!sta || !sta->rate_ctrl_priv) |
819 | goto out; | |
820 | ||
b481de9c | 821 | |
e227ceac | 822 | lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv; |
b481de9c | 823 | |
c33104f0 TW |
824 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
825 | !lq_sta->ibss_sta_added) | |
f4d6082d | 826 | goto out; |
b481de9c | 827 | |
c33104f0 TW |
828 | table = &lq_sta->lq; |
829 | active_index = lq_sta->active_tbl; | |
b481de9c | 830 | |
c33104f0 TW |
831 | curr_tbl = &(lq_sta->lq_info[active_index]); |
832 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
e227ceac TW |
833 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
834 | search_win = (struct iwl_rate_scale_data *)&(search_tbl->win[0]); | |
b481de9c | 835 | |
77626355 BC |
836 | /* |
837 | * Ignore this Tx frame response if its initial rate doesn't match | |
838 | * that of latest Link Quality command. There may be stragglers | |
839 | * from a previous Link Quality command, but we're no longer interested | |
840 | * in those; they're either from the "active" mode while we're trying | |
841 | * to check "search" mode, or a prior "search" mode after we've moved | |
842 | * to a new "search" mode (which might become the new "active" mode). | |
843 | */ | |
39e88504 GC |
844 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
845 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
846 | if (priv->band == IEEE80211_BAND_5GHZ) |
847 | rs_index -= IWL_FIRST_OFDM_RATE; | |
848 | ||
e039fa4a | 849 | if ((info->tx_rate_idx < 0) || |
4c424e4c | 850 | (tbl_type.is_SGI ^ |
e039fa4a | 851 | !!(info->flags & IEEE80211_TX_CTL_SHORT_GI)) || |
4c424e4c | 852 | (tbl_type.is_fat ^ |
e039fa4a | 853 | !!(info->flags & IEEE80211_TX_CTL_40_MHZ_WIDTH)) || |
4c424e4c | 854 | (tbl_type.is_dup ^ |
e039fa4a JB |
855 | !!(info->flags & IEEE80211_TX_CTL_DUP_DATA)) || |
856 | (tbl_type.ant_type ^ info->antenna_sel_tx) || | |
39e88504 | 857 | (!!(tx_rate & RATE_MCS_HT_MSK) ^ |
e039fa4a | 858 | !!(info->flags & IEEE80211_TX_CTL_OFDM_HT)) || |
39e88504 | 859 | (!!(tx_rate & RATE_MCS_GF_MSK) ^ |
e039fa4a | 860 | !!(info->flags & IEEE80211_TX_CTL_GREEN_FIELD)) || |
4c424e4c | 861 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e039fa4a | 862 | hw->wiphy->bands[info->band]->bitrates[info->tx_rate_idx].bitrate)) { |
39e88504 | 863 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
f4d6082d | 864 | goto out; |
b481de9c ZY |
865 | } |
866 | ||
77626355 | 867 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 868 | while (retries) { |
77626355 BC |
869 | /* Look up the rate and other info used for each tx attempt. |
870 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
871 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
872 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
873 | &tbl_type, &rs_index); |
874 | ||
77626355 BC |
875 | /* If type matches "search" table, |
876 | * add failure to "search" history */ | |
b481de9c | 877 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 878 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
879 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
880 | if (search_tbl->expected_tpt) | |
881 | tpt = search_tbl->expected_tpt[rs_index]; | |
882 | else | |
883 | tpt = 0; | |
99556438 | 884 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
885 | |
886 | /* Else if type matches "current/active" table, | |
887 | * add failure to "current/active" history */ | |
b481de9c | 888 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 889 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
890 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
891 | if (curr_tbl->expected_tpt) | |
892 | tpt = curr_tbl->expected_tpt[rs_index]; | |
893 | else | |
894 | tpt = 0; | |
99556438 | 895 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 896 | } |
77626355 BC |
897 | |
898 | /* If not searching for a new mode, increment failed counter | |
899 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
900 | if (lq_sta->stay_in_tbl) |
901 | lq_sta->total_failed++; | |
b481de9c ZY |
902 | --retries; |
903 | index++; | |
904 | ||
905 | } | |
906 | ||
77626355 BC |
907 | /* |
908 | * Find (by rate) the history window to update with final Tx attempt; | |
909 | * if Tx was successful first try, use original rate, | |
910 | * else look up the rate that was, finally, successful. | |
911 | */ | |
39e88504 GC |
912 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
913 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 914 | |
77626355 | 915 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 916 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 917 | |
77626355 BC |
918 | /* If type matches "search" table, |
919 | * add final tx status to "search" history */ | |
b481de9c | 920 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 921 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
922 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
923 | if (search_tbl->expected_tpt) | |
924 | tpt = search_tbl->expected_tpt[rs_index]; | |
925 | else | |
926 | tpt = 0; | |
e039fa4a | 927 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 928 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
929 | info->status.ampdu_ack_len, |
930 | info->status.ampdu_ack_map); | |
99556438 RR |
931 | else |
932 | rs_collect_tx_data(search_win, rs_index, tpt, | |
933 | 1, status); | |
77626355 BC |
934 | /* Else if type matches "current/active" table, |
935 | * add final tx status to "current/active" history */ | |
b481de9c | 936 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 937 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
938 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
939 | if (curr_tbl->expected_tpt) | |
940 | tpt = curr_tbl->expected_tpt[rs_index]; | |
941 | else | |
942 | tpt = 0; | |
e039fa4a | 943 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 944 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
945 | info->status.ampdu_ack_len, |
946 | info->status.ampdu_ack_map); | |
99556438 RR |
947 | else |
948 | rs_collect_tx_data(window, rs_index, tpt, | |
949 | 1, status); | |
b481de9c ZY |
950 | } |
951 | ||
77626355 BC |
952 | /* If not searching for new mode, increment success/failed counter |
953 | * ... these help determine when to start searching again */ | |
c33104f0 | 954 | if (lq_sta->stay_in_tbl) { |
e039fa4a JB |
955 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
956 | lq_sta->total_success += info->status.ampdu_ack_map; | |
99556438 | 957 | lq_sta->total_failed += |
e039fa4a | 958 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
959 | } else { |
960 | if (status) | |
961 | lq_sta->total_success++; | |
962 | else | |
963 | lq_sta->total_failed++; | |
964 | } | |
b481de9c ZY |
965 | } |
966 | ||
77626355 | 967 | /* See if there's a better rate or modulation mode to try. */ |
b481de9c | 968 | rs_rate_scale_perform(priv, dev, hdr, sta); |
f4d6082d | 969 | out: |
d0709a65 | 970 | rcu_read_unlock(); |
b481de9c ZY |
971 | return; |
972 | } | |
973 | ||
77626355 BC |
974 | /* |
975 | * Begin a period of staying with a selected modulation mode. | |
976 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
977 | * Set frame tx success limits according to legacy vs. high-throughput, | |
978 | * and reset overall (spanning all rates) tx success history statistics. | |
979 | * These control how long we stay using same modulation mode before | |
980 | * searching for a new mode. | |
981 | */ | |
bf403db8 | 982 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 983 | struct iwl_lq_sta *lq_sta) |
b481de9c | 984 | { |
eecd6e57 | 985 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 986 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 987 | if (is_legacy) { |
c33104f0 TW |
988 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
989 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
990 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 991 | } else { |
c33104f0 TW |
992 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
993 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
994 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 995 | } |
c33104f0 TW |
996 | lq_sta->table_count = 0; |
997 | lq_sta->total_failed = 0; | |
998 | lq_sta->total_success = 0; | |
b481de9c ZY |
999 | } |
1000 | ||
77626355 BC |
1001 | /* |
1002 | * Find correct throughput table for given mode of modulation | |
1003 | */ | |
e227ceac TW |
1004 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
1005 | struct iwl_scale_tbl_info *tbl) | |
b481de9c ZY |
1006 | { |
1007 | if (is_legacy(tbl->lq_type)) { | |
1008 | if (!is_a_band(tbl->lq_type)) | |
1009 | tbl->expected_tpt = expected_tpt_G; | |
1010 | else | |
1011 | tbl->expected_tpt = expected_tpt_A; | |
1012 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1013 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1014 | if (tbl->is_SGI) |
1015 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1016 | else | |
1017 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1018 | else if (tbl->is_SGI) | |
1019 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1020 | else | |
1021 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1022 | ||
fde0db31 | 1023 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1024 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1025 | if (tbl->is_SGI) |
1026 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1027 | else | |
1028 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1029 | else if (tbl->is_SGI) | |
1030 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1031 | else | |
1032 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1033 | } else | |
1034 | tbl->expected_tpt = expected_tpt_G; | |
1035 | } | |
1036 | ||
77626355 BC |
1037 | /* |
1038 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1039 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1040 | * above the current measured throughput of "active" mode, to give new mode | |
1041 | * a fair chance to prove itself without too many challenges. | |
1042 | * | |
1043 | * This gets called when transitioning to more aggressive modulation | |
1044 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1045 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1046 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1047 | * bit rate will typically need to increase, but not if performance was bad. | |
1048 | */ | |
c79dd5b5 | 1049 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1050 | struct iwl_lq_sta *lq_sta, |
1051 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1052 | u16 rate_mask, s8 index) |
b481de9c | 1053 | { |
77626355 | 1054 | /* "active" values */ |
e227ceac | 1055 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1056 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1057 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1058 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1059 | |
1060 | /* expected "search" throughput */ | |
1061 | s32 *tpt_tbl = tbl->expected_tpt; | |
1062 | ||
1063 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1064 | u16 high_low; |
f935a6da | 1065 | s8 rate = index; |
b481de9c ZY |
1066 | |
1067 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1068 | ||
1069 | for (; ;) { | |
bf403db8 EK |
1070 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1071 | tbl->lq_type); | |
b481de9c ZY |
1072 | |
1073 | low = high_low & 0xff; | |
1074 | high = (high_low >> 8) & 0xff; | |
1075 | ||
77626355 BC |
1076 | /* |
1077 | * Lower the "search" bit rate, to give new "search" mode | |
1078 | * approximately the same throughput as "active" if: | |
1079 | * | |
1080 | * 1) "Active" mode has been working modestly well (but not | |
1081 | * great), and expected "search" throughput (under perfect | |
1082 | * conditions) at candidate rate is above the actual | |
1083 | * measured "active" throughput (but less than expected | |
1084 | * "active" throughput under perfect conditions). | |
1085 | * OR | |
1086 | * 2) "Active" mode has been working perfectly or very well | |
1087 | * and expected "search" throughput (under perfect | |
1088 | * conditions) at candidate rate is above expected | |
1089 | * "active" throughput (under perfect conditions). | |
1090 | */ | |
c33104f0 | 1091 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1092 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1093 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1094 | (tpt_tbl[rate] <= active_tpt))) || | |
1095 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1096 | (tpt_tbl[rate] > active_tpt))) { | |
1097 | ||
77626355 BC |
1098 | /* (2nd or later pass) |
1099 | * If we've already tried to raise the rate, and are | |
1100 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1101 | if (start_hi != IWL_RATE_INVALID) { |
1102 | new_rate = start_hi; | |
1103 | break; | |
1104 | } | |
77626355 | 1105 | |
b481de9c | 1106 | new_rate = rate; |
77626355 BC |
1107 | |
1108 | /* Loop again with lower rate */ | |
b481de9c ZY |
1109 | if (low != IWL_RATE_INVALID) |
1110 | rate = low; | |
77626355 BC |
1111 | |
1112 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1113 | else |
1114 | break; | |
77626355 BC |
1115 | |
1116 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1117 | } else { |
77626355 BC |
1118 | /* (2nd or later pass) |
1119 | * If we've already tried to lower the rate, and are | |
1120 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1121 | if (new_rate != IWL_RATE_INVALID) |
1122 | break; | |
77626355 BC |
1123 | |
1124 | /* Loop again with higher rate */ | |
b481de9c ZY |
1125 | else if (high != IWL_RATE_INVALID) { |
1126 | start_hi = high; | |
1127 | rate = high; | |
77626355 BC |
1128 | |
1129 | /* Higher rate not available, use the original */ | |
b481de9c | 1130 | } else { |
b481de9c ZY |
1131 | break; |
1132 | } | |
1133 | } | |
1134 | } | |
1135 | ||
1136 | return new_rate; | |
1137 | } | |
b481de9c | 1138 | |
77626355 BC |
1139 | /* |
1140 | * Set up search table for MIMO | |
1141 | */ | |
fde0db31 | 1142 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1143 | struct iwl_lq_sta *lq_sta, |
270243a5 RR |
1144 | struct ieee80211_conf *conf, |
1145 | struct sta_info *sta, | |
e227ceac | 1146 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1147 | { |
b481de9c ZY |
1148 | u16 rate_mask; |
1149 | s32 rate; | |
c33104f0 | 1150 | s8 is_green = lq_sta->is_green; |
b481de9c | 1151 | |
270243a5 RR |
1152 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1153 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1154 | return -1; |
1155 | ||
4834c73f RR |
1156 | if (((sta->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS) >> 2) |
1157 | == IWL_MIMO_PS_STATIC) | |
b481de9c ZY |
1158 | return -1; |
1159 | ||
77626355 | 1160 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1161 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1162 | return -1; |
1163 | ||
eecd6e57 | 1164 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1165 | |
1166 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1167 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1168 | tbl->action = 0; |
39e88504 GC |
1169 | rate_mask = lq_sta->active_mimo2_rate; |
1170 | ||
270243a5 | 1171 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1172 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1173 | tbl->is_fat = 1; |
1174 | else | |
1175 | tbl->is_fat = 0; | |
1176 | ||
39e88504 | 1177 | /* FIXME: - don't toggle SGI here |
b481de9c | 1178 | if (tbl->is_fat) { |
270243a5 | 1179 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1180 | tbl->is_SGI = 1; |
1181 | else | |
1182 | tbl->is_SGI = 0; | |
270243a5 | 1183 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1184 | tbl->is_SGI = 1; |
1185 | else | |
1186 | tbl->is_SGI = 0; | |
39e88504 | 1187 | */ |
b481de9c | 1188 | |
eecd6e57 | 1189 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1190 | |
f935a6da | 1191 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1192 | |
eecd6e57 | 1193 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1194 | |
1195 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1196 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1197 | rate, rate_mask); |
b481de9c | 1198 | return -1; |
39e88504 GC |
1199 | } |
1200 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); | |
b481de9c | 1201 | |
eecd6e57 | 1202 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1203 | tbl->current_rate, is_green); |
dc2453ae | 1204 | return 0; |
fde0db31 | 1205 | } |
b481de9c | 1206 | |
77626355 BC |
1207 | /* |
1208 | * Set up search table for SISO | |
1209 | */ | |
c79dd5b5 | 1210 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1211 | struct iwl_lq_sta *lq_sta, |
270243a5 RR |
1212 | struct ieee80211_conf *conf, |
1213 | struct sta_info *sta, | |
e227ceac | 1214 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1215 | { |
b481de9c | 1216 | u16 rate_mask; |
c33104f0 | 1217 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1218 | s32 rate; |
1219 | ||
270243a5 RR |
1220 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1221 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1222 | return -1; |
1223 | ||
eecd6e57 | 1224 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1225 | |
c33104f0 | 1226 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1227 | tbl->lq_type = LQ_SISO; |
1228 | tbl->action = 0; | |
39e88504 | 1229 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1230 | |
270243a5 RR |
1231 | if (priv->current_ht_config.supported_chan_width |
1232 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1233 | tbl->is_fat = 1; |
1234 | else | |
1235 | tbl->is_fat = 0; | |
1236 | ||
39e88504 | 1237 | /* FIXME: - don't toggle SGI here |
b481de9c | 1238 | if (tbl->is_fat) { |
270243a5 | 1239 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1240 | tbl->is_SGI = 1; |
1241 | else | |
1242 | tbl->is_SGI = 0; | |
270243a5 | 1243 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1244 | tbl->is_SGI = 1; |
1245 | else | |
1246 | tbl->is_SGI = 0; | |
39e88504 | 1247 | */ |
b481de9c ZY |
1248 | |
1249 | if (is_green) | |
39e88504 | 1250 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1251 | |
eecd6e57 | 1252 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1253 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1254 | |
eecd6e57 | 1255 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1256 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1257 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1258 | rate, rate_mask); |
1259 | return -1; | |
1260 | } | |
39e88504 | 1261 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); |
eecd6e57 | 1262 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1263 | tbl->current_rate, is_green); |
403ab56b | 1264 | return 0; |
b481de9c ZY |
1265 | } |
1266 | ||
77626355 BC |
1267 | /* |
1268 | * Try to switch to new modulation mode from legacy | |
1269 | */ | |
c79dd5b5 | 1270 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1271 | struct iwl_lq_sta *lq_sta, |
270243a5 RR |
1272 | struct ieee80211_conf *conf, |
1273 | struct sta_info *sta, | |
b481de9c ZY |
1274 | int index) |
1275 | { | |
e227ceac TW |
1276 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1277 | struct iwl_scale_tbl_info *search_tbl = | |
1278 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1279 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1280 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1281 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1282 | u8 start_action = tbl->action; |
fde0db31 GC |
1283 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1284 | int ret = 0; | |
b481de9c ZY |
1285 | |
1286 | for (; ;) { | |
1287 | switch (tbl->action) { | |
1288 | case IWL_LEGACY_SWITCH_ANTENNA: | |
f935a6da | 1289 | IWL_DEBUG_RATE("LQ: Legacy toggle Antenna\n"); |
b481de9c | 1290 | |
c33104f0 | 1291 | lq_sta->action_counter++; |
77626355 BC |
1292 | |
1293 | /* Don't change antenna if success has been great */ | |
b481de9c ZY |
1294 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1295 | break; | |
77626355 | 1296 | |
77626355 | 1297 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1298 | memcpy(search_tbl, tbl, sz); |
1299 | ||
aade00ce GC |
1300 | if (rs_toggle_antenna(valid_tx_ant, |
1301 | &search_tbl->current_rate, search_tbl)) { | |
aade00ce GC |
1302 | lq_sta->search_better_tbl = 1; |
1303 | goto out; | |
1304 | } | |
a5e8b505 | 1305 | break; |
b481de9c | 1306 | case IWL_LEGACY_SWITCH_SISO: |
eecd6e57 | 1307 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1308 | |
1309 | /* Set up search table to try SISO */ | |
b481de9c | 1310 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1311 | search_tbl->is_SGI = 0; |
c33104f0 | 1312 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1313 | search_tbl, index); |
dc2453ae | 1314 | if (!ret) { |
c33104f0 TW |
1315 | lq_sta->search_better_tbl = 1; |
1316 | lq_sta->action_counter = 0; | |
b481de9c | 1317 | goto out; |
dc2453ae | 1318 | } |
b481de9c ZY |
1319 | |
1320 | break; | |
fde0db31 | 1321 | case IWL_LEGACY_SWITCH_MIMO2: |
eecd6e57 | 1322 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1323 | |
1324 | /* Set up search table to try MIMO */ | |
b481de9c | 1325 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1326 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1327 | search_tbl->ant_type = ANT_AB;/*FIXME:RS*/ |
1328 | /*FIXME:RS:need to check ant validity*/ | |
1329 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1330 | search_tbl, index); |
dc2453ae | 1331 | if (!ret) { |
c33104f0 TW |
1332 | lq_sta->search_better_tbl = 1; |
1333 | lq_sta->action_counter = 0; | |
b481de9c | 1334 | goto out; |
dc2453ae | 1335 | } |
b481de9c ZY |
1336 | break; |
1337 | } | |
1338 | tbl->action++; | |
fde0db31 | 1339 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1340 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1341 | ||
1342 | if (tbl->action == start_action) | |
1343 | break; | |
1344 | ||
1345 | } | |
1346 | return 0; | |
1347 | ||
1348 | out: | |
1349 | tbl->action++; | |
fde0db31 | 1350 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1351 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1352 | return 0; | |
1353 | ||
1354 | } | |
1355 | ||
77626355 BC |
1356 | /* |
1357 | * Try to switch to new modulation mode from SISO | |
1358 | */ | |
c79dd5b5 | 1359 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1360 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1361 | struct ieee80211_conf *conf, |
e227ceac | 1362 | struct sta_info *sta, int index) |
b481de9c | 1363 | { |
c33104f0 | 1364 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1365 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1366 | struct iwl_scale_tbl_info *search_tbl = | |
1367 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1368 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1369 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1370 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1371 | u8 start_action = tbl->action; |
fde0db31 GC |
1372 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1373 | int ret; | |
b481de9c ZY |
1374 | |
1375 | for (;;) { | |
c33104f0 | 1376 | lq_sta->action_counter++; |
b481de9c ZY |
1377 | switch (tbl->action) { |
1378 | case IWL_SISO_SWITCH_ANTENNA: | |
eecd6e57 | 1379 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
b481de9c ZY |
1380 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1381 | break; | |
b481de9c ZY |
1382 | |
1383 | memcpy(search_tbl, tbl, sz); | |
aade00ce GC |
1384 | if (rs_toggle_antenna(valid_tx_ant, |
1385 | &search_tbl->current_rate, search_tbl)) { | |
1386 | lq_sta->search_better_tbl = 1; | |
1387 | goto out; | |
1388 | } | |
a5e8b505 | 1389 | break; |
fde0db31 | 1390 | case IWL_SISO_SWITCH_MIMO2: |
a5e8b505 | 1391 | IWL_DEBUG_RATE("LQ: SISO switch to MIMO2\n"); |
b481de9c | 1392 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1393 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1394 | search_tbl->ant_type = ANT_AB; /*FIXME:RS*/ |
1395 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1396 | search_tbl, index); |
dc2453ae | 1397 | if (!ret) { |
c33104f0 | 1398 | lq_sta->search_better_tbl = 1; |
b481de9c | 1399 | goto out; |
dc2453ae | 1400 | } |
b481de9c ZY |
1401 | break; |
1402 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1403 | if (!tbl->is_fat && |
1404 | !(priv->current_ht_config.sgf & | |
1405 | HT_SHORT_GI_20MHZ)) | |
1406 | break; | |
1407 | if (tbl->is_fat && | |
1408 | !(priv->current_ht_config.sgf & | |
1409 | HT_SHORT_GI_40MHZ)) | |
1410 | break; | |
1411 | ||
eecd6e57 | 1412 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1413 | |
b481de9c | 1414 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1415 | if (is_green) { |
1416 | if (!tbl->is_SGI) | |
1417 | break; | |
1418 | else | |
1419 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1420 | } |
39e88504 | 1421 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1422 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1423 | if (tbl->is_SGI) { |
1424 | s32 tpt = lq_sta->last_tpt / 100; | |
1425 | if (tpt >= search_tbl->expected_tpt[index]) | |
1426 | break; | |
1427 | } | |
1428 | search_tbl->current_rate = rate_n_flags_from_tbl( | |
1429 | search_tbl, index, is_green); | |
1430 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1431 | goto out; |
1432 | } | |
1433 | tbl->action++; | |
1434 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1435 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1436 | ||
1437 | if (tbl->action == start_action) | |
1438 | break; | |
1439 | } | |
1440 | return 0; | |
1441 | ||
1442 | out: | |
1443 | tbl->action++; | |
1444 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1445 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1446 | return 0; | |
1447 | } | |
1448 | ||
77626355 BC |
1449 | /* |
1450 | * Try to switch to new modulation mode from MIMO | |
1451 | */ | |
c79dd5b5 | 1452 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
e227ceac | 1453 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1454 | struct ieee80211_conf *conf, |
e227ceac | 1455 | struct sta_info *sta, int index) |
b481de9c | 1456 | { |
c33104f0 | 1457 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1458 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1459 | struct iwl_scale_tbl_info *search_tbl = | |
1460 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1461 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1462 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1463 | u8 start_action = tbl->action; |
aade00ce GC |
1464 | /*u8 valid_tx_ant = priv->hw_params.valid_tx_ant;*/ |
1465 | int ret; | |
b481de9c ZY |
1466 | |
1467 | for (;;) { | |
c33104f0 | 1468 | lq_sta->action_counter++; |
b481de9c ZY |
1469 | switch (tbl->action) { |
1470 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1471 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
eecd6e57 | 1472 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1473 | |
77626355 | 1474 | /* Set up new search table for SISO */ |
b481de9c | 1475 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1476 | |
1477 | /*FIXME:RS:need to check ant validity + C*/ | |
b481de9c | 1478 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) |
fde0db31 | 1479 | search_tbl->ant_type = ANT_A; |
b481de9c | 1480 | else |
fde0db31 | 1481 | search_tbl->ant_type = ANT_B; |
b481de9c | 1482 | |
c33104f0 | 1483 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1484 | search_tbl, index); |
dc2453ae | 1485 | if (!ret) { |
c33104f0 | 1486 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1487 | goto out; |
1488 | } | |
1489 | break; | |
1490 | ||
1491 | case IWL_MIMO_SWITCH_GI: | |
a9841013 EG |
1492 | if (!tbl->is_fat && |
1493 | !(priv->current_ht_config.sgf & | |
1494 | HT_SHORT_GI_20MHZ)) | |
1495 | break; | |
1496 | if (tbl->is_fat && | |
1497 | !(priv->current_ht_config.sgf & | |
1498 | HT_SHORT_GI_40MHZ)) | |
1499 | break; | |
1500 | ||
eecd6e57 | 1501 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1502 | |
1503 | /* Set up new search table for MIMO */ | |
b481de9c | 1504 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1505 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1506 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1507 | /* |
1508 | * If active table already uses the fastest possible | |
1509 | * modulation (dual stream with short guard interval), | |
1510 | * and it's working well, there's no need to look | |
1511 | * for a better type of modulation! | |
1512 | */ | |
39e88504 | 1513 | if (tbl->is_SGI) { |
c33104f0 | 1514 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1515 | if (tpt >= search_tbl->expected_tpt[index]) |
1516 | break; | |
b481de9c | 1517 | } |
39e88504 GC |
1518 | search_tbl->current_rate = rate_n_flags_from_tbl( |
1519 | search_tbl, index, is_green); | |
1520 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1521 | goto out; |
1522 | ||
1523 | } | |
1524 | tbl->action++; | |
1525 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1526 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1527 | ||
1528 | if (tbl->action == start_action) | |
1529 | break; | |
1530 | } | |
1531 | ||
1532 | return 0; | |
1533 | out: | |
1534 | tbl->action++; | |
1535 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1536 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1537 | return 0; | |
1538 | ||
1539 | } | |
1540 | ||
77626355 BC |
1541 | /* |
1542 | * Check whether we should continue using same modulation mode, or | |
1543 | * begin search for a new mode, based on: | |
1544 | * 1) # tx successes or failures while using this mode | |
1545 | * 2) # times calling this function | |
1546 | * 3) elapsed time in this mode (not used, for now) | |
1547 | */ | |
e227ceac | 1548 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1549 | { |
e227ceac | 1550 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1551 | int i; |
1552 | int active_tbl; | |
1553 | int flush_interval_passed = 0; | |
bf403db8 | 1554 | struct iwl_priv *priv; |
b481de9c | 1555 | |
bf403db8 | 1556 | priv = lq_sta->drv; |
c33104f0 | 1557 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1558 | |
c33104f0 | 1559 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1560 | |
77626355 | 1561 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1562 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1563 | |
77626355 | 1564 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1565 | if (lq_sta->flush_timer) |
b481de9c ZY |
1566 | flush_interval_passed = |
1567 | time_after(jiffies, | |
c33104f0 | 1568 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1569 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1570 | ||
77626355 BC |
1571 | /* |
1572 | * Check if we should allow search for new modulation mode. | |
1573 | * If many frames have failed or succeeded, or we've used | |
1574 | * this same modulation for a long time, allow search, and | |
1575 | * reset history stats that keep track of whether we should | |
1576 | * allow a new search. Also (below) reset all bitmaps and | |
1577 | * stats in active history. | |
1578 | */ | |
c33104f0 TW |
1579 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1580 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1581 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1582 | && (flush_interval_passed))) { |
eecd6e57 | 1583 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1584 | lq_sta->total_failed, |
1585 | lq_sta->total_success, | |
b481de9c | 1586 | flush_interval_passed); |
77626355 BC |
1587 | |
1588 | /* Allow search for new mode */ | |
c33104f0 TW |
1589 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1590 | lq_sta->total_failed = 0; | |
1591 | lq_sta->total_success = 0; | |
1592 | lq_sta->flush_timer = 0; | |
77626355 BC |
1593 | |
1594 | /* | |
1595 | * Else if we've used this modulation mode enough repetitions | |
1596 | * (regardless of elapsed time or success/failure), reset | |
1597 | * history bitmaps and rate-specific stats for all rates in | |
1598 | * active table. | |
1599 | */ | |
403ab56b | 1600 | } else { |
c33104f0 TW |
1601 | lq_sta->table_count++; |
1602 | if (lq_sta->table_count >= | |
1603 | lq_sta->table_count_limit) { | |
1604 | lq_sta->table_count = 0; | |
b481de9c | 1605 | |
eecd6e57 | 1606 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1607 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1608 | rs_rate_scale_clear_window( | |
1609 | &(tbl->win[i])); | |
1610 | } | |
1611 | } | |
1612 | ||
77626355 BC |
1613 | /* If transitioning to allow "search", reset all history |
1614 | * bitmaps and stats in active table (this will become the new | |
1615 | * "search" table). */ | |
c33104f0 | 1616 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1617 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1618 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1619 | } | |
1620 | } | |
1621 | } | |
1622 | ||
77626355 BC |
1623 | /* |
1624 | * Do rate scaling and search for new modulation mode. | |
1625 | */ | |
c79dd5b5 | 1626 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
1627 | struct net_device *dev, |
1628 | struct ieee80211_hdr *hdr, | |
1629 | struct sta_info *sta) | |
1630 | { | |
270243a5 RR |
1631 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
1632 | struct ieee80211_hw *hw = local_to_hw(local); | |
1633 | struct ieee80211_conf *conf = &hw->conf; | |
b481de9c ZY |
1634 | int low = IWL_RATE_INVALID; |
1635 | int high = IWL_RATE_INVALID; | |
1636 | int index; | |
1637 | int i; | |
e227ceac | 1638 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1639 | int current_tpt = IWL_INVALID_VALUE; |
1640 | int low_tpt = IWL_INVALID_VALUE; | |
1641 | int high_tpt = IWL_INVALID_VALUE; | |
1642 | u32 fail_count; | |
1643 | s8 scale_action = 0; | |
fd7c8a40 HH |
1644 | __le16 fc; |
1645 | u16 rate_mask; | |
b481de9c | 1646 | u8 update_lq = 0; |
e227ceac TW |
1647 | struct iwl_lq_sta *lq_sta; |
1648 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
b481de9c | 1649 | u16 rate_scale_index_msk = 0; |
39e88504 | 1650 | u32 rate; |
b481de9c ZY |
1651 | u8 is_green = 0; |
1652 | u8 active_tbl = 0; | |
1653 | u8 done_search = 0; | |
1654 | u16 high_low; | |
a5e8b505 | 1655 | s32 sr; |
0c11b4de | 1656 | u8 tid = MAX_TID_COUNT; |
b481de9c ZY |
1657 | |
1658 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1659 | ||
fd7c8a40 | 1660 | fc = hdr->frame_control; |
b481de9c ZY |
1661 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
1662 | /* Send management frames and broadcast/multicast data using | |
1663 | * lowest rate. */ | |
1664 | /* TODO: this could probably be improved.. */ | |
1665 | return; | |
1666 | } | |
1667 | ||
1668 | if (!sta || !sta->rate_ctrl_priv) | |
1669 | return; | |
1670 | ||
e227ceac | 1671 | lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv; |
68d12b7c | 1672 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1673 | |
faa29718 RR |
1674 | tid = rs_tl_add_packet(lq_sta, hdr); |
1675 | ||
77626355 BC |
1676 | /* |
1677 | * Select rate-scale / modulation-mode table to work with in | |
1678 | * the rest of this function: "search" if searching for better | |
1679 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1680 | */ | |
c33104f0 TW |
1681 | if (!lq_sta->search_better_tbl) |
1682 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1683 | else |
c33104f0 | 1684 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1685 | |
c33104f0 TW |
1686 | tbl = &(lq_sta->lq_info[active_tbl]); |
1687 | is_green = lq_sta->is_green; | |
b481de9c | 1688 | |
77626355 | 1689 | /* current tx rate */ |
8318d78a | 1690 | index = sta->last_txrate_idx; |
b481de9c ZY |
1691 | |
1692 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1693 | tbl->lq_type); | |
1694 | ||
77626355 | 1695 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1696 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1697 | |
1698 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1699 | ||
1700 | /* mask with station rate restriction */ | |
1701 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1702 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1703 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1704 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1705 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1706 | else |
1707 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1708 | lq_sta->supp_rates); |
b481de9c ZY |
1709 | |
1710 | } else | |
1711 | rate_scale_index_msk = rate_mask; | |
1712 | ||
1713 | if (!rate_scale_index_msk) | |
1714 | rate_scale_index_msk = rate_mask; | |
1715 | ||
07bc28ed GC |
1716 | if (!((1 << index) & rate_scale_index_msk)) { |
1717 | IWL_ERROR("Current Rate is not valid\n"); | |
1718 | return; | |
b481de9c ZY |
1719 | } |
1720 | ||
77626355 | 1721 | /* Get expected throughput table and history window for current rate */ |
07bc28ed GC |
1722 | if (!tbl->expected_tpt) { |
1723 | IWL_ERROR("tbl->expected_tpt is NULL\n"); | |
1724 | return; | |
1725 | } | |
b481de9c ZY |
1726 | |
1727 | window = &(tbl->win[index]); | |
1728 | ||
77626355 BC |
1729 | /* |
1730 | * If there is not enough history to calculate actual average | |
1731 | * throughput, keep analyzing results of more tx frames, without | |
1732 | * changing rate or mode (bypass most of the rest of this function). | |
1733 | * Set up new rate table in uCode only if old rate is not supported | |
1734 | * in current association (use new rate found above). | |
1735 | */ | |
b481de9c | 1736 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1737 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1738 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1739 | IWL_DEBUG_RATE("LQ: still below TH. succ=%d total=%d " | |
b481de9c ZY |
1740 | "for index %d\n", |
1741 | window->success_counter, window->counter, index); | |
77626355 BC |
1742 | |
1743 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1744 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1745 | |
1746 | /* Should we stay with this modulation mode, | |
1747 | * or search for a new one? */ | |
c33104f0 | 1748 | rs_stay_in_table(lq_sta); |
77626355 | 1749 | |
b481de9c ZY |
1750 | goto out; |
1751 | ||
77626355 BC |
1752 | /* Else we have enough samples; calculate estimate of |
1753 | * actual average throughput */ | |
07bc28ed GC |
1754 | } else { |
1755 | /*FIXME:RS remove this else if we don't get this error*/ | |
1756 | if (window->average_tpt != ((window->success_ratio * | |
1757 | tbl->expected_tpt[index] + 64) / 128)) { | |
1758 | IWL_ERROR("expected_tpt should have been calculated" | |
1759 | " by now\n"); | |
1760 | window->average_tpt = ((window->success_ratio * | |
b481de9c | 1761 | tbl->expected_tpt[index] + 64) / 128); |
07bc28ed GC |
1762 | } |
1763 | } | |
b481de9c | 1764 | |
77626355 | 1765 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1766 | if (lq_sta->search_better_tbl) { |
b481de9c | 1767 | |
77626355 BC |
1768 | /* If good success, continue using the "search" mode; |
1769 | * no need to send new link quality command, since we're | |
1770 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1771 | if (window->average_tpt > lq_sta->last_tpt) { |
1772 | ||
1773 | IWL_DEBUG_RATE("LQ: SWITCHING TO CURRENT TABLE " | |
1774 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1775 | window->success_ratio, | |
1776 | window->average_tpt, | |
1777 | lq_sta->last_tpt); | |
1778 | ||
1779 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1780 | lq_sta->enable_counter = 1; |
07bc28ed | 1781 | |
77626355 | 1782 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1783 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1784 | current_tpt = window->average_tpt; |
77626355 BC |
1785 | |
1786 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1787 | } else { |
07bc28ed GC |
1788 | |
1789 | IWL_DEBUG_RATE("LQ: GOING BACK TO THE OLD TABLE " | |
1790 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1791 | window->success_ratio, | |
1792 | window->average_tpt, | |
1793 | lq_sta->last_tpt); | |
1794 | ||
77626355 | 1795 | /* Nullify "search" table */ |
b481de9c | 1796 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1797 | |
1798 | /* Revert to "active" table */ | |
c33104f0 TW |
1799 | active_tbl = lq_sta->active_tbl; |
1800 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1801 | |
77626355 | 1802 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 1803 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 1804 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1805 | |
77626355 | 1806 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1807 | update_lq = 1; |
b481de9c | 1808 | } |
77626355 BC |
1809 | |
1810 | /* Either way, we've made a decision; modulation mode | |
1811 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1812 | lq_sta->search_better_tbl = 0; |
77626355 | 1813 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1814 | goto lq_update; |
1815 | } | |
1816 | ||
77626355 BC |
1817 | /* (Else) not in search of better modulation mode, try for better |
1818 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1819 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1820 | tbl->lq_type); |
1821 | low = high_low & 0xff; | |
1822 | high = (high_low >> 8) & 0xff; | |
1823 | ||
a5e8b505 GC |
1824 | sr = window->success_ratio; |
1825 | ||
77626355 | 1826 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1827 | current_tpt = window->average_tpt; |
b481de9c ZY |
1828 | if (low != IWL_RATE_INVALID) |
1829 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1830 | if (high != IWL_RATE_INVALID) |
1831 | high_tpt = tbl->win[high].average_tpt; | |
1832 | ||
a5e8b505 | 1833 | scale_action = 0; |
b481de9c | 1834 | |
77626355 | 1835 | /* Too many failures, decrease rate */ |
a5e8b505 | 1836 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
b481de9c ZY |
1837 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
1838 | scale_action = -1; | |
77626355 BC |
1839 | |
1840 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 1841 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
1842 | (high_tpt == IWL_INVALID_VALUE)) { |
1843 | ||
1844 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
1845 | scale_action = 1; | |
1846 | else if (low != IWL_RATE_INVALID) | |
1847 | scale_action = -1; | |
1848 | } | |
77626355 BC |
1849 | |
1850 | /* Both adjacent throughputs are measured, but neither one has better | |
1851 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1852 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1853 | (high_tpt != IWL_INVALID_VALUE) && | |
1854 | (low_tpt < current_tpt) && | |
1855 | (high_tpt < current_tpt)) | |
1856 | scale_action = 0; | |
77626355 BC |
1857 | |
1858 | /* At least one adjacent rate's throughput is measured, | |
1859 | * and may have better performance. */ | |
b481de9c | 1860 | else { |
77626355 | 1861 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1862 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1863 | /* Higher rate has better throughput */ |
a5e8b505 GC |
1864 | if (high_tpt > current_tpt && |
1865 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 1866 | scale_action = 1; |
a5e8b505 | 1867 | } else { |
b481de9c ZY |
1868 | IWL_DEBUG_RATE |
1869 | ("decrease rate because of high tpt\n"); | |
1870 | scale_action = -1; | |
1871 | } | |
77626355 BC |
1872 | |
1873 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1874 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1875 | /* Lower rate has better throughput */ |
b481de9c ZY |
1876 | if (low_tpt > current_tpt) { |
1877 | IWL_DEBUG_RATE | |
1878 | ("decrease rate because of low tpt\n"); | |
1879 | scale_action = -1; | |
a5e8b505 | 1880 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 1881 | scale_action = 1; |
a5e8b505 | 1882 | } |
b481de9c ZY |
1883 | } |
1884 | } | |
1885 | ||
77626355 BC |
1886 | /* Sanity check; asked for decrease, but success rate or throughput |
1887 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
1888 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
1889 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 1890 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
1891 | scale_action = 0; |
1892 | ||
1893 | switch (scale_action) { | |
1894 | case -1: | |
77626355 | 1895 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1896 | if (low != IWL_RATE_INVALID) { |
1897 | update_lq = 1; | |
1898 | index = low; | |
1899 | } | |
1900 | break; | |
1901 | case 1: | |
77626355 | 1902 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1903 | if (high != IWL_RATE_INVALID) { |
1904 | update_lq = 1; | |
1905 | index = high; | |
1906 | } | |
1907 | ||
1908 | break; | |
1909 | case 0: | |
77626355 | 1910 | /* No change */ |
b481de9c ZY |
1911 | default: |
1912 | break; | |
1913 | } | |
1914 | ||
eecd6e57 | 1915 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1916 | "high %d type %d\n", |
1917 | index, scale_action, low, high, tbl->lq_type); | |
1918 | ||
a5e8b505 | 1919 | lq_update: |
77626355 | 1920 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1921 | if (update_lq) { |
39e88504 | 1922 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
07bc28ed | 1923 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1924 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1925 | } |
77626355 BC |
1926 | |
1927 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1928 | rs_stay_in_table(lq_sta); |
b481de9c | 1929 | |
77626355 BC |
1930 | /* |
1931 | * Search for new modulation mode if we're: | |
1932 | * 1) Not changing rates right now | |
1933 | * 2) Not just finishing up a search | |
1934 | * 3) Allowing a new search | |
1935 | */ | |
47cfd463 | 1936 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 1937 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1938 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1939 | |
77626355 BC |
1940 | /* Select a new "search" modulation mode to try. |
1941 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1942 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1943 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1944 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1945 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1946 | else |
c33104f0 | 1947 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1948 | |
77626355 | 1949 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 1950 | if (lq_sta->search_better_tbl) { |
77626355 | 1951 | /* Access the "search" table, clear its history. */ |
c33104f0 | 1952 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
1953 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1954 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1955 | ||
77626355 | 1956 | /* Use new "search" start rate */ |
e7d326ac | 1957 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 1958 | |
eecd6e57 | 1959 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 | 1960 | tbl->current_rate, index); |
07bc28ed | 1961 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 1962 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1963 | } |
b481de9c | 1964 | |
77626355 BC |
1965 | /* If the "active" (non-search) mode was legacy, |
1966 | * and we've tried switching antennas, | |
1967 | * but we haven't been able to try HT modes (not available), | |
1968 | * stay with best antenna legacy modulation for a while | |
1969 | * before next round of mode comparisons. */ | |
c33104f0 | 1970 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1971 | if (is_legacy(tbl1->lq_type) && |
270243a5 | 1972 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
c33104f0 TW |
1973 | (lq_sta->action_counter >= 1)) { |
1974 | lq_sta->action_counter = 0; | |
eecd6e57 | 1975 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
bf403db8 | 1976 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
1977 | } |
1978 | ||
77626355 BC |
1979 | /* If we're in an HT mode, and all 3 mode switch actions |
1980 | * have been tried and compared, stay in this best modulation | |
1981 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
1982 | if (lq_sta->enable_counter && |
1983 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
1984 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
1985 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
1986 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 1987 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 1988 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 1989 | } |
c33104f0 | 1990 | lq_sta->action_counter = 0; |
bf403db8 | 1991 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 1992 | } |
77626355 BC |
1993 | |
1994 | /* | |
1995 | * Else, don't search for a new modulation mode. | |
1996 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
1997 | * 1) Not changing rates right now | |
1998 | * 2) Not just finishing up a search | |
1999 | * 3) flush timer is empty | |
2000 | */ | |
b481de9c | 2001 | } else { |
c33104f0 TW |
2002 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2003 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2004 | } |
2005 | ||
2006 | out: | |
39e88504 | 2007 | tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green); |
b481de9c | 2008 | i = index; |
8318d78a | 2009 | sta->last_txrate_idx = i; |
b481de9c | 2010 | |
8318d78a | 2011 | /* sta->txrate_idx is an index to A mode rates which start |
b481de9c ZY |
2012 | * at IWL_FIRST_OFDM_RATE |
2013 | */ | |
8318d78a JB |
2014 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
2015 | sta->txrate_idx = i - IWL_FIRST_OFDM_RATE; | |
b481de9c | 2016 | else |
8318d78a | 2017 | sta->txrate_idx = i; |
b481de9c ZY |
2018 | |
2019 | return; | |
2020 | } | |
2021 | ||
2022 | ||
c79dd5b5 | 2023 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2024 | struct ieee80211_conf *conf, |
b481de9c ZY |
2025 | struct sta_info *sta) |
2026 | { | |
e227ceac TW |
2027 | struct iwl_lq_sta *lq_sta; |
2028 | struct iwl_scale_tbl_info *tbl; | |
b481de9c | 2029 | int rate_idx; |
aade00ce | 2030 | int i; |
39e88504 | 2031 | u32 rate; |
aade00ce GC |
2032 | u8 use_green = rs_use_green(priv, conf); |
2033 | u8 active_tbl = 0; | |
2034 | u8 valid_tx_ant; | |
b481de9c ZY |
2035 | |
2036 | if (!sta || !sta->rate_ctrl_priv) | |
2037 | goto out; | |
2038 | ||
e227ceac | 2039 | lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2040 | i = sta->last_txrate_idx; |
b481de9c | 2041 | |
c33104f0 | 2042 | if ((lq_sta->lq.sta_id == 0xff) && |
b481de9c ZY |
2043 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
2044 | goto out; | |
2045 | ||
aade00ce GC |
2046 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2047 | ||
c33104f0 TW |
2048 | if (!lq_sta->search_better_tbl) |
2049 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2050 | else |
c33104f0 | 2051 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2052 | |
c33104f0 | 2053 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2054 | |
2055 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2056 | i = 0; | |
2057 | ||
fde0db31 | 2058 | /* FIXME:RS: This is also wrong in 4965 */ |
1826dcc0 | 2059 | rate = iwl_rates[i].plcp; |
39e88504 GC |
2060 | rate |= RATE_MCS_ANT_B_MSK; |
2061 | rate &= ~RATE_MCS_ANT_A_MSK; | |
b481de9c ZY |
2062 | |
2063 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2064 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2065 | |
fde0db31 | 2066 | tbl->ant_type = ANT_B; |
39e88504 | 2067 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2068 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2069 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2070 | |
39e88504 GC |
2071 | rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green); |
2072 | tbl->current_rate = rate; | |
eecd6e57 | 2073 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2074 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2075 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2076 | out: |
2077 | return; | |
2078 | } | |
2079 | ||
1abbe498 | 2080 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
8318d78a JB |
2081 | struct ieee80211_supported_band *sband, |
2082 | struct sk_buff *skb, | |
1abbe498 | 2083 | struct rate_selection *sel) |
b481de9c ZY |
2084 | { |
2085 | ||
2086 | int i; | |
2087 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
270243a5 | 2088 | struct ieee80211_conf *conf = &local->hw.conf; |
b481de9c ZY |
2089 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2090 | struct sta_info *sta; | |
fd7c8a40 | 2091 | __le16 fc; |
c79dd5b5 | 2092 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
e227ceac | 2093 | struct iwl_lq_sta *lq_sta; |
b481de9c | 2094 | |
58826351 | 2095 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2096 | |
d0709a65 JB |
2097 | rcu_read_lock(); |
2098 | ||
b481de9c ZY |
2099 | sta = sta_info_get(local, hdr->addr1); |
2100 | ||
2bc454b0 MW |
2101 | /* Send management frames and broadcast/multicast data using lowest |
2102 | * rate. */ | |
fd7c8a40 | 2103 | fc = hdr->frame_control; |
2bc454b0 MW |
2104 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || |
2105 | !sta || !sta->rate_ctrl_priv) { | |
2e92e6f2 | 2106 | sel->rate_idx = rate_lowest_index(local, sband, sta); |
f4d6082d | 2107 | goto out; |
b481de9c ZY |
2108 | } |
2109 | ||
e227ceac | 2110 | lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2111 | i = sta->last_txrate_idx; |
b481de9c | 2112 | |
c33104f0 TW |
2113 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
2114 | !lq_sta->ibss_sta_added) { | |
947b13a7 | 2115 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
0795af57 | 2116 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
2117 | |
2118 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2119 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2120 | print_mac(mac, hdr->addr1)); | |
4f40e4d9 | 2121 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2122 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2123 | } |
2124 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2125 | lq_sta->lq.sta_id = sta_id; |
2126 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2127 | lq_sta->ibss_sta_added = 1; | |
270243a5 | 2128 | rs_initialize_lq(priv, conf, sta); |
b481de9c | 2129 | } |
b481de9c ZY |
2130 | } |
2131 | ||
1abbe498 | 2132 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
2e92e6f2 | 2133 | sel->rate_idx = rate_lowest_index(local, sband, sta); |
f4d6082d | 2134 | goto out; |
1abbe498 | 2135 | } |
b481de9c | 2136 | |
2e92e6f2 JB |
2137 | if (sband->band == IEEE80211_BAND_5GHZ) |
2138 | i -= IWL_FIRST_OFDM_RATE; | |
2139 | sel->rate_idx = i; | |
f4d6082d TW |
2140 | out: |
2141 | rcu_read_unlock(); | |
b481de9c ZY |
2142 | } |
2143 | ||
bf403db8 | 2144 | static void *rs_alloc_sta(void *priv_rate, gfp_t gfp) |
b481de9c | 2145 | { |
e227ceac | 2146 | struct iwl_lq_sta *lq_sta; |
bf403db8 | 2147 | struct iwl_priv *priv; |
b481de9c ZY |
2148 | int i, j; |
2149 | ||
bf403db8 | 2150 | priv = (struct iwl_priv *)priv_rate; |
b481de9c ZY |
2151 | IWL_DEBUG_RATE("create station rate scale window\n"); |
2152 | ||
e227ceac | 2153 | lq_sta = kzalloc(sizeof(struct iwl_lq_sta), gfp); |
b481de9c | 2154 | |
c33104f0 | 2155 | if (lq_sta == NULL) |
b481de9c | 2156 | return NULL; |
c33104f0 | 2157 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2158 | |
63fddb9f | 2159 | |
b481de9c ZY |
2160 | for (j = 0; j < LQ_SIZE; j++) |
2161 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2162 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2163 | |
c33104f0 | 2164 | return lq_sta; |
b481de9c ZY |
2165 | } |
2166 | ||
2167 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
2168 | struct ieee80211_local *local, | |
2169 | struct sta_info *sta) | |
2170 | { | |
2171 | int i, j; | |
270243a5 | 2172 | struct ieee80211_conf *conf = &local->hw.conf; |
8318d78a | 2173 | struct ieee80211_supported_band *sband; |
c79dd5b5 | 2174 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
e227ceac | 2175 | struct iwl_lq_sta *lq_sta = priv_sta; |
b481de9c | 2176 | |
8318d78a JB |
2177 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
2178 | ||
c33104f0 | 2179 | lq_sta->flush_timer = 0; |
8318d78a JB |
2180 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
2181 | sta->txrate_idx = 3; | |
b481de9c ZY |
2182 | for (j = 0; j < LQ_SIZE; j++) |
2183 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2184 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2185 | |
07bc28ed | 2186 | IWL_DEBUG_RATE("LQ: *** rate scale global init ***\n"); |
b481de9c ZY |
2187 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2188 | * the lowest or the highest rate.. Could consider using RSSI from | |
2189 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2190 | * after assoc.. */ | |
2191 | ||
c33104f0 | 2192 | lq_sta->ibss_sta_added = 0; |
b481de9c | 2193 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { |
947b13a7 | 2194 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 JP |
2195 | DECLARE_MAC_BUF(mac); |
2196 | ||
b481de9c | 2197 | /* for IBSS the call are from tasklet */ |
eecd6e57 | 2198 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
0795af57 | 2199 | print_mac(mac, sta->addr)); |
b481de9c ZY |
2200 | |
2201 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2202 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2203 | print_mac(mac, sta->addr)); | |
4f40e4d9 | 2204 | sta_id = iwl_add_station_flags(priv, sta->addr, |
67d62035 | 2205 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2206 | } |
2207 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2208 | lq_sta->lq.sta_id = sta_id; |
2209 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2210 | } |
2211 | /* FIXME: this is w/a remove it later */ | |
2212 | priv->assoc_station_added = 1; | |
2213 | } | |
2214 | ||
77626355 | 2215 | /* Find highest tx rate supported by hardware and destination station */ |
8318d78a JB |
2216 | for (i = 0; i < sband->n_bitrates; i++) |
2217 | if (sta->supp_rates[sband->band] & BIT(i)) | |
2218 | sta->txrate_idx = i; | |
2219 | ||
2220 | sta->last_txrate_idx = sta->txrate_idx; | |
05ecc2c1 | 2221 | /* For MODE_IEEE80211A, skip over cck rates in global rate table */ |
8318d78a JB |
2222 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
2223 | sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
b481de9c | 2224 | |
c33104f0 | 2225 | lq_sta->is_dup = 0; |
c33104f0 | 2226 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2227 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2228 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2229 | lq_sta->band = priv->band; |
77626355 BC |
2230 | /* |
2231 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2232 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2233 | */ | |
263b5f5a RR |
2234 | lq_sta->active_siso_rate = conf->ht_conf.supp_mcs_set[0] << 1; |
2235 | lq_sta->active_siso_rate |= conf->ht_conf.supp_mcs_set[0] & 0x1; | |
c33104f0 | 2236 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2237 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2238 | |
77626355 | 2239 | /* Same here */ |
263b5f5a RR |
2240 | lq_sta->active_mimo2_rate = conf->ht_conf.supp_mcs_set[1] << 1; |
2241 | lq_sta->active_mimo2_rate |= conf->ht_conf.supp_mcs_set[1] & 0x1; | |
fde0db31 GC |
2242 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2243 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2244 | ||
263b5f5a RR |
2245 | lq_sta->active_mimo3_rate = conf->ht_conf.supp_mcs_set[2] << 1; |
2246 | lq_sta->active_mimo3_rate |= conf->ht_conf.supp_mcs_set[2] & 0x1; | |
fde0db31 GC |
2247 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2248 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2249 | ||
07bc28ed | 2250 | IWL_DEBUG_RATE("SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2251 | lq_sta->active_siso_rate, |
fde0db31 GC |
2252 | lq_sta->active_mimo2_rate, |
2253 | lq_sta->active_mimo3_rate); | |
2254 | ||
07bc28ed GC |
2255 | /* These values will be overriden later */ |
2256 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; | |
2257 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2258 | ||
0c11b4de RR |
2259 | /* as default allow aggregation for all tids */ |
2260 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2261 | lq_sta->drv = priv; |
b481de9c | 2262 | |
270243a5 | 2263 | rs_initialize_lq(priv, conf, sta); |
b481de9c ZY |
2264 | } |
2265 | ||
fde0db31 | 2266 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 2267 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2268 | { |
e227ceac | 2269 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2270 | int index = 0; |
b481de9c | 2271 | int rate_idx; |
1b696de2 | 2272 | int repeat_rate = 0; |
aade00ce | 2273 | u8 ant_toggle_cnt = 0; |
b481de9c | 2274 | u8 use_ht_possible = 1; |
aade00ce | 2275 | u8 valid_tx_ant = 0; |
07bc28ed | 2276 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2277 | |
77626355 | 2278 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2279 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2280 | |
39e88504 | 2281 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2282 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2283 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2284 | &tbl_type, &rate_idx); |
2285 | ||
77626355 | 2286 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2287 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2288 | ant_toggle_cnt = 1; |
1b696de2 | 2289 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2290 | } else { |
1b696de2 | 2291 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2292 | } |
b481de9c ZY |
2293 | |
2294 | lq_cmd->general_params.mimo_delimiter = | |
2295 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2296 | |
2297 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2298 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2299 | |
07bc28ed GC |
2300 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2301 | lq_cmd->general_params.single_stream_ant_msk = | |
2302 | tbl_type.ant_type; | |
2303 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2304 | lq_cmd->general_params.dual_stream_ant_msk = | |
2305 | tbl_type.ant_type; | |
2306 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2307 | |
2308 | index++; | |
1b696de2 | 2309 | repeat_rate--; |
b481de9c | 2310 | |
aade00ce GC |
2311 | if (priv) |
2312 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2313 | ||
77626355 | 2314 | /* Fill rest of rate table */ |
b481de9c | 2315 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2316 | /* Repeat initial/next rate. |
2317 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2318 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2319 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2320 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2321 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2322 | ant_toggle_cnt++; | |
2323 | else if (priv && | |
2324 | rs_toggle_antenna(valid_tx_ant, | |
2325 | &new_rate, &tbl_type)) | |
2326 | ant_toggle_cnt = 1; | |
2327 | } | |
98d7e09a | 2328 | |
77626355 | 2329 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2330 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2331 | |
2332 | /* Fill next table entry */ | |
b481de9c | 2333 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2334 | cpu_to_le32(new_rate); |
1b696de2 | 2335 | repeat_rate--; |
b481de9c ZY |
2336 | index++; |
2337 | } | |
2338 | ||
39e88504 | 2339 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2340 | &rate_idx); |
2341 | ||
77626355 BC |
2342 | /* Indicate to uCode which entries might be MIMO. |
2343 | * If initial rate was MIMO, this will finally end up | |
2344 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2345 | if (is_mimo(tbl_type.lq_type)) |
2346 | lq_cmd->general_params.mimo_delimiter = index; | |
2347 | ||
77626355 | 2348 | /* Get next rate */ |
39e88504 GC |
2349 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2350 | use_ht_possible); | |
b481de9c | 2351 | |
77626355 | 2352 | /* How many times should we repeat the next rate? */ |
b481de9c | 2353 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2354 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2355 | ant_toggle_cnt++; | |
2356 | else if (priv && | |
2357 | rs_toggle_antenna(valid_tx_ant, | |
2358 | &new_rate, &tbl_type)) | |
2359 | ant_toggle_cnt = 1; | |
2360 | ||
1b696de2 | 2361 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2362 | } else { |
1b696de2 | 2363 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2364 | } |
b481de9c | 2365 | |
77626355 BC |
2366 | /* Don't allow HT rates after next pass. |
2367 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2368 | use_ht_possible = 0; |
2369 | ||
77626355 | 2370 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2371 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2372 | |
2373 | /* Fill next table entry */ | |
39e88504 | 2374 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2375 | |
2376 | index++; | |
1b696de2 | 2377 | repeat_rate--; |
b481de9c ZY |
2378 | } |
2379 | ||
5e1dd8dc | 2380 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2381 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2382 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2383 | } |
2384 | ||
2385 | static void *rs_alloc(struct ieee80211_local *local) | |
2386 | { | |
2387 | return local->hw.priv; | |
2388 | } | |
2389 | /* rate scale requires free function to be implemented */ | |
2390 | static void rs_free(void *priv_rate) | |
2391 | { | |
2392 | return; | |
2393 | } | |
2394 | ||
2395 | static void rs_clear(void *priv_rate) | |
2396 | { | |
e170402e | 2397 | #ifdef CONFIG_IWLWIFI_DEBUG |
c79dd5b5 | 2398 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
b481de9c ZY |
2399 | |
2400 | IWL_DEBUG_RATE("enter\n"); | |
2401 | ||
36e1f16e | 2402 | /* TODO - add rate scale state reset */ |
b481de9c ZY |
2403 | |
2404 | IWL_DEBUG_RATE("leave\n"); | |
e170402e | 2405 | #endif /* CONFIG_IWLWIFI_DEBUG */ |
b481de9c ZY |
2406 | } |
2407 | ||
bf403db8 | 2408 | static void rs_free_sta(void *priv_rate, void *priv_sta) |
b481de9c | 2409 | { |
e227ceac | 2410 | struct iwl_lq_sta *lq_sta = priv_sta; |
bf403db8 | 2411 | struct iwl_priv *priv; |
b481de9c | 2412 | |
bf403db8 | 2413 | priv = (struct iwl_priv *)priv_rate; |
b481de9c | 2414 | IWL_DEBUG_RATE("enter\n"); |
c33104f0 | 2415 | kfree(lq_sta); |
b481de9c ZY |
2416 | IWL_DEBUG_RATE("leave\n"); |
2417 | } | |
2418 | ||
2419 | ||
93dc646a | 2420 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2421 | static int open_file_generic(struct inode *inode, struct file *file) |
2422 | { | |
2423 | file->private_data = inode->i_private; | |
2424 | return 0; | |
2425 | } | |
e227ceac TW |
2426 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2427 | u32 *rate_n_flags, int index) | |
98d7e09a | 2428 | { |
bf403db8 EK |
2429 | struct iwl_priv *priv; |
2430 | ||
2431 | priv = lq_sta->drv; | |
39e88504 GC |
2432 | if (lq_sta->dbg_fixed_rate) { |
2433 | if (index < 12) { | |
2434 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2435 | } else { | |
2436 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2437 | *rate_n_flags = 0x800D; | |
2438 | else | |
2439 | *rate_n_flags = 0x820A; | |
2440 | } | |
98d7e09a | 2441 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2442 | } else { |
2443 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2444 | } |
98d7e09a | 2445 | } |
5ae212c9 | 2446 | |
98d7e09a ZY |
2447 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2448 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2449 | { | |
e227ceac | 2450 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2451 | struct iwl_priv *priv; |
98d7e09a ZY |
2452 | char buf[64]; |
2453 | int buf_size; | |
2454 | u32 parsed_rate; | |
2455 | ||
bf403db8 | 2456 | priv = lq_sta->drv; |
98d7e09a ZY |
2457 | memset(buf, 0, sizeof(buf)); |
2458 | buf_size = min(count, sizeof(buf) - 1); | |
2459 | if (copy_from_user(buf, user_buf, buf_size)) | |
2460 | return -EFAULT; | |
2461 | ||
2462 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2463 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2464 | else |
39e88504 | 2465 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2466 | |
39e88504 GC |
2467 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2468 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2469 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2470 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2471 | |
2472 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2473 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2474 | |
39e88504 | 2475 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2476 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2477 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2478 | } |
2479 | ||
2480 | return count; | |
2481 | } | |
0209dc11 | 2482 | |
5ae212c9 ZY |
2483 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2484 | char __user *user_buf, size_t count, loff_t *ppos) | |
2485 | { | |
2486 | char buff[1024]; | |
2487 | int desc = 0; | |
2488 | int i = 0; | |
2489 | ||
e227ceac | 2490 | struct iwl_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2491 | |
c33104f0 | 2492 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2493 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2494 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2495 | lq_sta->active_legacy_rate); |
98d7e09a | 2496 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2497 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2498 | desc += sprintf(buff+desc, "general:" |
2499 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2500 | lq_sta->lq.general_params.flags, |
2501 | lq_sta->lq.general_params.mimo_delimiter, | |
2502 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2503 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2504 | |
2505 | desc += sprintf(buff+desc, "agg:" | |
2506 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2507 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2508 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2509 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2510 | |
2511 | desc += sprintf(buff+desc, | |
2512 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2513 | lq_sta->lq.general_params.start_rate_index[0], |
2514 | lq_sta->lq.general_params.start_rate_index[1], | |
2515 | lq_sta->lq.general_params.start_rate_index[2], | |
2516 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2517 | |
2518 | ||
2519 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2520 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2521 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2522 | |
2523 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2524 | } | |
2525 | ||
2526 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2527 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2528 | .read = rs_sta_dbgfs_scale_table_read, |
2529 | .open = open_file_generic, | |
2530 | }; | |
0209dc11 ZY |
2531 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2532 | char __user *user_buf, size_t count, loff_t *ppos) | |
2533 | { | |
2534 | char buff[1024]; | |
2535 | int desc = 0; | |
2536 | int i, j; | |
2537 | ||
e227ceac | 2538 | struct iwl_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2539 | for (i = 0; i < LQ_SIZE; i++) { |
2540 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2541 | "rate=0x%X\n", | |
c33104f0 TW |
2542 | lq_sta->active_tbl == i?"*":"x", |
2543 | lq_sta->lq_info[i].lq_type, | |
2544 | lq_sta->lq_info[i].is_SGI, | |
2545 | lq_sta->lq_info[i].is_fat, | |
2546 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2547 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2548 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2549 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2550 | "counter=%d success=%d %%=%d\n", |
2551 | lq_sta->lq_info[i].win[j].counter, | |
2552 | lq_sta->lq_info[i].win[j].success_counter, | |
2553 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2554 | } |
2555 | } | |
2556 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2557 | } | |
2558 | ||
2559 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2560 | .read = rs_sta_dbgfs_stats_table_read, | |
2561 | .open = open_file_generic, | |
2562 | }; | |
5ae212c9 | 2563 | |
93dc646a ZY |
2564 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2565 | struct dentry *dir) | |
2566 | { | |
e227ceac | 2567 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2568 | lq_sta->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 2569 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2570 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2571 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2572 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2573 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2574 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2575 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2576 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2577 | |
93dc646a ZY |
2578 | } |
2579 | ||
2580 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2581 | { | |
e227ceac | 2582 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2583 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2584 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2585 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2586 | } |
2587 | #endif | |
2588 | ||
b481de9c ZY |
2589 | static struct rate_control_ops rs_ops = { |
2590 | .module = NULL, | |
2591 | .name = RS_NAME, | |
2592 | .tx_status = rs_tx_status, | |
2593 | .get_rate = rs_get_rate, | |
2594 | .rate_init = rs_rate_init, | |
2595 | .clear = rs_clear, | |
2596 | .alloc = rs_alloc, | |
2597 | .free = rs_free, | |
2598 | .alloc_sta = rs_alloc_sta, | |
2599 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2600 | #ifdef CONFIG_MAC80211_DEBUGFS |
2601 | .add_sta_debugfs = rs_add_debugfs, | |
2602 | .remove_sta_debugfs = rs_remove_debugfs, | |
2603 | #endif | |
b481de9c ZY |
2604 | }; |
2605 | ||
e227ceac | 2606 | int iwlagn_rate_control_register(void) |
b481de9c | 2607 | { |
897e1cf2 | 2608 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2609 | } |
2610 | ||
e227ceac | 2611 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
2612 | { |
2613 | ieee80211_rate_control_unregister(&rs_ops); | |
2614 | } | |
2615 |