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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 | ||
3e0d4cb1 | 38 | #include "iwl-dev.h" |
be1f3ab6 | 39 | #include "iwl-sta.h" |
857485c0 | 40 | #include "iwl-core.h" |
b481de9c ZY |
41 | #include "iwl-helpers.h" |
42 | ||
e227ceac | 43 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 44 | |
aade00ce | 45 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
46 | #define IWL_NUMBER_TRY 1 |
47 | #define IWL_HT_NUMBER_TRY 3 | |
48 | ||
77626355 BC |
49 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
50 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
51 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
52 | ||
53 | /* max time to accum history 2 seconds */ | |
54 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) | |
b481de9c ZY |
55 | |
56 | static u8 rs_ht_to_legacy[] = { | |
57 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
58 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
59 | IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
61 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
62 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
63 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
64 | }; | |
65 | ||
aade00ce GC |
66 | static const u8 ant_toggle_lookup[] = { |
67 | /*ANT_NONE -> */ ANT_NONE, | |
68 | /*ANT_A -> */ ANT_B, | |
69 | /*ANT_B -> */ ANT_C, | |
70 | /*ANT_AB -> */ ANT_BC, | |
71 | /*ANT_C -> */ ANT_A, | |
72 | /*ANT_AC -> */ ANT_AB, | |
73 | /*ANT_BC -> */ ANT_AC, | |
74 | /*ANT_ABC -> */ ANT_ABC, | |
75 | }; | |
76 | ||
77626355 | 77 | /** |
e227ceac | 78 | * struct iwl_rate_scale_data -- tx success history for one rate |
77626355 | 79 | */ |
e227ceac | 80 | struct iwl_rate_scale_data { |
77626355 BC |
81 | u64 data; /* bitmap of successful frames */ |
82 | s32 success_counter; /* number of frames successful */ | |
83 | s32 success_ratio; /* per-cent * 128 */ | |
84 | s32 counter; /* number of frames attempted */ | |
85 | s32 average_tpt; /* success ratio * expected throughput */ | |
b481de9c ZY |
86 | unsigned long stamp; |
87 | }; | |
88 | ||
77626355 | 89 | /** |
e227ceac | 90 | * struct iwl_scale_tbl_info -- tx params and success history for all rates |
77626355 | 91 | * |
e227ceac | 92 | * There are two of these in struct iwl_lq_sta, |
77626355 BC |
93 | * one for "active", and one for "search". |
94 | */ | |
e227ceac | 95 | struct iwl_scale_tbl_info { |
fde0db31 GC |
96 | enum iwl_table_type lq_type; |
97 | u8 ant_type; | |
77626355 BC |
98 | u8 is_SGI; /* 1 = short guard interval */ |
99 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
100 | u8 is_dup; /* 1 = duplicated data streams */ | |
101 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
102 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
39e88504 | 103 | u32 current_rate; /* rate_n_flags, uCode API format */ |
e227ceac | 104 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
105 | }; |
106 | ||
e227ceac | 107 | struct iwl_traffic_load { |
0c11b4de RR |
108 | unsigned long time_stamp; /* age of the oldest statistics */ |
109 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
110 | * slice */ | |
111 | u32 total; /* total num of packets during the | |
112 | * last TID_MAX_TIME_DIFF */ | |
113 | u8 queue_count; /* number of queues that has | |
114 | * been used since the last cleanup */ | |
115 | u8 head; /* start of the circular buffer */ | |
116 | }; | |
117 | ||
77626355 | 118 | /** |
e227ceac | 119 | * struct iwl_lq_sta -- driver's rate scaling private structure |
77626355 BC |
120 | * |
121 | * Pointer to this gets passed back and forth between driver and mac80211. | |
122 | */ | |
e227ceac | 123 | struct iwl_lq_sta { |
77626355 BC |
124 | u8 active_tbl; /* index of active table, range 0-1 */ |
125 | u8 enable_counter; /* indicates HT mode */ | |
126 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
127 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 128 | s32 last_tpt; |
77626355 BC |
129 | |
130 | /* The following determine when to search for a new mode */ | |
b481de9c | 131 | u32 table_count_limit; |
77626355 BC |
132 | u32 max_failure_limit; /* # failed frames before new search */ |
133 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 134 | u32 table_count; |
77626355 BC |
135 | u32 total_failed; /* total failed frames, any/all rates */ |
136 | u32 total_success; /* total successful frames, any/all rates */ | |
137 | u32 flush_timer; /* time staying in mode before new search */ | |
138 | ||
139 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
140 | u8 is_green; |
141 | u8 is_dup; | |
8318d78a | 142 | enum ieee80211_band band; |
b481de9c | 143 | u8 ibss_sta_added; |
77626355 BC |
144 | |
145 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 146 | u32 supp_rates; |
39e88504 | 147 | u16 active_legacy_rate; |
b481de9c | 148 | u16 active_siso_rate; |
fde0db31 GC |
149 | u16 active_mimo2_rate; |
150 | u16 active_mimo3_rate; | |
b481de9c | 151 | u16 active_rate_basic; |
77626355 | 152 | |
66c73db7 | 153 | struct iwl_link_quality_cmd lq; |
e227ceac TW |
154 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
155 | struct iwl_traffic_load load[TID_MAX_LOAD_COUNT]; | |
0c11b4de | 156 | u8 tx_agg_tid_en; |
5ae212c9 | 157 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 158 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 159 | struct dentry *rs_sta_dbgfs_stats_table_file; |
0c11b4de | 160 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; |
39e88504 | 161 | u32 dbg_fixed_rate; |
5ae212c9 | 162 | #endif |
6243065d | 163 | struct iwl_priv *drv; |
b7e35008 JB |
164 | |
165 | /* used to be in sta_info */ | |
166 | int last_txrate_idx; | |
b481de9c ZY |
167 | }; |
168 | ||
c79dd5b5 | 169 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 170 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
171 | struct ieee80211_sta *sta, |
172 | struct iwl_lq_sta *lq_sta); | |
fde0db31 | 173 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 174 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
b481de9c ZY |
175 | |
176 | ||
98d7e09a | 177 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
178 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
179 | u32 *rate_n_flags, int index); | |
98d7e09a | 180 | #else |
e227ceac TW |
181 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
182 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
183 | {} |
184 | #endif | |
77626355 BC |
185 | |
186 | /* | |
187 | * Expected throughput metrics for following rates: | |
188 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
189 | * "G" is the only table that supports CCK (the first 4 rates). | |
190 | */ | |
fde0db31 | 191 | /*FIXME:RS:need to spearate tables for MIMO2/MIMO3*/ |
b481de9c ZY |
192 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
193 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
194 | }; | |
195 | ||
196 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
197 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
198 | }; | |
199 | ||
200 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
201 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
202 | }; | |
203 | ||
204 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
205 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
206 | }; | |
207 | ||
208 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
209 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
210 | }; | |
211 | ||
212 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
213 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
214 | }; | |
215 | ||
216 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
217 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
218 | }; | |
219 | ||
220 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
221 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
222 | }; | |
223 | ||
224 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
225 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
226 | }; | |
227 | ||
228 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
229 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
230 | }; | |
231 | ||
39e88504 | 232 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
233 | { |
234 | return (u8)(rate_n_flags & 0xFF); | |
235 | } | |
236 | ||
e227ceac | 237 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
238 | { |
239 | window->data = 0; | |
240 | window->success_counter = 0; | |
241 | window->success_ratio = IWL_INVALID_VALUE; | |
242 | window->counter = 0; | |
243 | window->average_tpt = IWL_INVALID_VALUE; | |
244 | window->stamp = 0; | |
b481de9c ZY |
245 | } |
246 | ||
aade00ce GC |
247 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
248 | { | |
3ac7f146 | 249 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
250 | } |
251 | ||
0c11b4de RR |
252 | /* |
253 | * removes the old data from the statistics. All data that is older than | |
254 | * TID_MAX_TIME_DIFF, will be deleted. | |
255 | */ | |
e227ceac | 256 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
257 | { |
258 | /* The oldest age we want to keep */ | |
259 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
260 | ||
261 | while (tl->queue_count && | |
262 | (tl->time_stamp < oldest_time)) { | |
263 | tl->total -= tl->packet_count[tl->head]; | |
264 | tl->packet_count[tl->head] = 0; | |
265 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
266 | tl->queue_count--; | |
267 | tl->head++; | |
268 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
269 | tl->head = 0; | |
270 | } | |
271 | } | |
272 | ||
273 | /* | |
274 | * increment traffic load value for tid and also remove | |
275 | * any old values if passed the certain time period | |
276 | */ | |
e227ceac | 277 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 278 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
279 | { |
280 | u32 curr_time = jiffies_to_msecs(jiffies); | |
281 | u32 time_diff; | |
282 | s32 index; | |
e227ceac | 283 | struct iwl_traffic_load *tl = NULL; |
fd7c8a40 | 284 | __le16 fc = hdr->frame_control; |
54dbb525 | 285 | u8 tid; |
0c11b4de | 286 | |
fd7c8a40 HH |
287 | if (ieee80211_is_data_qos(fc)) { |
288 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
54dbb525 TW |
289 | tid = qc[0] & 0xf; |
290 | } else | |
faa29718 | 291 | return MAX_TID_COUNT; |
0c11b4de RR |
292 | |
293 | tl = &lq_data->load[tid]; | |
294 | ||
295 | curr_time -= curr_time % TID_ROUND_VALUE; | |
296 | ||
297 | /* Happens only for the first packet. Initialize the data */ | |
298 | if (!(tl->queue_count)) { | |
299 | tl->total = 1; | |
300 | tl->time_stamp = curr_time; | |
301 | tl->queue_count = 1; | |
302 | tl->head = 0; | |
303 | tl->packet_count[0] = 1; | |
faa29718 | 304 | return MAX_TID_COUNT; |
0c11b4de RR |
305 | } |
306 | ||
307 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
308 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
309 | ||
310 | /* The history is too long: remove data that is older than */ | |
311 | /* TID_MAX_TIME_DIFF */ | |
312 | if (index >= TID_QUEUE_MAX_SIZE) | |
313 | rs_tl_rm_old_stats(tl, curr_time); | |
314 | ||
315 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
316 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
317 | tl->total = tl->total + 1; | |
318 | ||
319 | if ((index + 1) > tl->queue_count) | |
320 | tl->queue_count = index + 1; | |
faa29718 RR |
321 | |
322 | return tid; | |
0c11b4de RR |
323 | } |
324 | ||
325 | /* | |
326 | get the traffic load value for tid | |
327 | */ | |
e227ceac | 328 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
329 | { |
330 | u32 curr_time = jiffies_to_msecs(jiffies); | |
331 | u32 time_diff; | |
332 | s32 index; | |
e227ceac | 333 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
334 | |
335 | if (tid >= TID_MAX_LOAD_COUNT) | |
336 | return 0; | |
337 | ||
338 | tl = &(lq_data->load[tid]); | |
339 | ||
340 | curr_time -= curr_time % TID_ROUND_VALUE; | |
341 | ||
342 | if (!(tl->queue_count)) | |
343 | return 0; | |
344 | ||
345 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
346 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
347 | ||
348 | /* The history is too long: remove data that is older than */ | |
349 | /* TID_MAX_TIME_DIFF */ | |
350 | if (index >= TID_QUEUE_MAX_SIZE) | |
351 | rs_tl_rm_old_stats(tl, curr_time); | |
352 | ||
353 | return tl->total; | |
354 | } | |
355 | ||
c79dd5b5 | 356 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 357 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 358 | struct ieee80211_sta *sta) |
0c11b4de | 359 | { |
ff550cb4 | 360 | if (rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { |
e174961c JB |
361 | IWL_DEBUG_HT("Starting Tx agg: STA: %pM tid: %d\n", |
362 | sta->addr, tid); | |
4b7679a5 | 363 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); |
0c11b4de RR |
364 | } |
365 | } | |
366 | ||
c79dd5b5 | 367 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 368 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 369 | struct ieee80211_sta *sta) |
0c11b4de RR |
370 | { |
371 | if ((tid < TID_MAX_LOAD_COUNT)) | |
372 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
373 | else if (tid == IWL_AGG_ALL_TID) | |
374 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
375 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
376 | } | |
377 | ||
39e88504 | 378 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 379 | { |
3ac7f146 TW |
380 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
381 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
382 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
383 | } |
384 | ||
77626355 BC |
385 | /** |
386 | * rs_collect_tx_data - Update the success/failure sliding window | |
387 | * | |
388 | * We keep a sliding window of the last 62 packets transmitted | |
389 | * at this rate. window->data contains the bitmask of successful | |
390 | * packets. | |
391 | */ | |
e227ceac | 392 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
99556438 RR |
393 | int scale_index, s32 tpt, int retries, |
394 | int successes) | |
b481de9c | 395 | { |
e227ceac | 396 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 397 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
398 | s32 fail_count; |
399 | ||
dc2453ae TW |
400 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
401 | return -EINVAL; | |
b481de9c | 402 | |
77626355 | 403 | /* Select data for current tx bit rate */ |
b481de9c ZY |
404 | window = &(windows[scale_index]); |
405 | ||
77626355 BC |
406 | /* |
407 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
408 | * history window; anything older isn't really relevant any more. | |
409 | * If we have filled up the sliding window, drop the oldest attempt; | |
410 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
411 | * subtract "1" from the success counter (this is the main reason | |
412 | * we keep these bitmaps!). | |
413 | */ | |
99556438 | 414 | while (retries > 0) { |
39e88504 GC |
415 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
416 | ||
417 | /* remove earliest */ | |
418 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
419 | ||
99556438 RR |
420 | if (window->data & mask) { |
421 | window->data &= ~mask; | |
39e88504 | 422 | window->success_counter--; |
99556438 | 423 | } |
b481de9c | 424 | } |
b481de9c | 425 | |
99556438 RR |
426 | /* Increment frames-attempted counter */ |
427 | window->counter++; | |
428 | ||
429 | /* Shift bitmap by one frame (throw away oldest history), | |
430 | * OR in "1", and increment "success" if this | |
431 | * frame was successful. */ | |
90d7795e | 432 | window->data <<= 1; |
99556438 | 433 | if (successes > 0) { |
39e88504 | 434 | window->success_counter++; |
99556438 RR |
435 | window->data |= 0x1; |
436 | successes--; | |
437 | } | |
77626355 | 438 | |
99556438 | 439 | retries--; |
b481de9c ZY |
440 | } |
441 | ||
77626355 | 442 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
443 | if (window->counter > 0) |
444 | window->success_ratio = 128 * (100 * window->success_counter) | |
445 | / window->counter; | |
446 | else | |
447 | window->success_ratio = IWL_INVALID_VALUE; | |
448 | ||
449 | fail_count = window->counter - window->success_counter; | |
450 | ||
77626355 | 451 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
452 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
453 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
454 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
455 | else | |
456 | window->average_tpt = IWL_INVALID_VALUE; | |
457 | ||
77626355 | 458 | /* Tag this window as having been updated */ |
b481de9c ZY |
459 | window->stamp = jiffies; |
460 | ||
dc2453ae | 461 | return 0; |
b481de9c ZY |
462 | } |
463 | ||
77626355 BC |
464 | /* |
465 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
466 | */ | |
39e88504 | 467 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
e227ceac | 468 | static u32 rate_n_flags_from_tbl(struct iwl_scale_tbl_info *tbl, |
39e88504 | 469 | int index, u8 use_green) |
b481de9c | 470 | { |
39e88504 GC |
471 | u32 rate_n_flags = 0; |
472 | ||
b481de9c | 473 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 474 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 475 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 476 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 477 | |
fde0db31 GC |
478 | } else if (is_Ht(tbl->lq_type)) { |
479 | if (index > IWL_LAST_OFDM_RATE) { | |
480 | IWL_ERROR("invalid HT rate index %d\n", index); | |
b481de9c | 481 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 482 | } |
39e88504 | 483 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
484 | |
485 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 486 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 487 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 488 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 489 | else |
1826dcc0 | 490 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 491 | } else { |
fde0db31 | 492 | IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
493 | } |
494 | ||
39e88504 | 495 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 496 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 497 | |
39e88504 GC |
498 | if (is_Ht(tbl->lq_type)) { |
499 | if (tbl->is_fat) { | |
500 | if (tbl->is_dup) | |
501 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
502 | else | |
503 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
504 | } | |
505 | if (tbl->is_SGI) | |
506 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
507 | ||
508 | if (use_green) { | |
509 | rate_n_flags |= RATE_MCS_GF_MSK; | |
510 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
511 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
512 | IWL_ERROR("GF was set with SGI:SISO\n"); | |
513 | } | |
514 | } | |
b481de9c | 515 | } |
39e88504 | 516 | return rate_n_flags; |
b481de9c ZY |
517 | } |
518 | ||
77626355 BC |
519 | /* |
520 | * Interpret uCode API's rate_n_flags format, | |
521 | * fill "search" or "active" tx mode table. | |
522 | */ | |
39e88504 | 523 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 524 | enum ieee80211_band band, |
e227ceac | 525 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
526 | int *rate_idx) |
527 | { | |
39e88504 GC |
528 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
529 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
530 | u8 mcs; | |
b481de9c | 531 | |
e7d326ac | 532 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 533 | |
fde0db31 | 534 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 535 | *rate_idx = -1; |
dc2453ae | 536 | return -EINVAL; |
b481de9c | 537 | } |
77626355 | 538 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
539 | tbl->is_fat = 0; |
540 | tbl->is_dup = 0; | |
fde0db31 GC |
541 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
542 | tbl->lq_type = LQ_NONE; | |
b481de9c | 543 | |
77626355 | 544 | /* legacy rate format */ |
39e88504 | 545 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 546 | if (num_of_ant == 1) { |
8318d78a | 547 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
548 | tbl->lq_type = LQ_A; |
549 | else | |
550 | tbl->lq_type = LQ_G; | |
b481de9c | 551 | } |
fde0db31 | 552 | /* HT rate format */ |
b481de9c | 553 | } else { |
39e88504 | 554 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
555 | tbl->is_SGI = 1; |
556 | ||
39e88504 GC |
557 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
558 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
559 | tbl->is_fat = 1; |
560 | ||
39e88504 | 561 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 562 | tbl->is_dup = 1; |
fde0db31 | 563 | |
39e88504 | 564 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 565 | |
39e88504 GC |
566 | /* SISO */ |
567 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
568 | if (num_of_ant == 1) |
569 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
570 | /* MIMO2 */ | |
39e88504 | 571 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
572 | if (num_of_ant == 2) |
573 | tbl->lq_type = LQ_MIMO2; | |
574 | /* MIMO3 */ | |
575 | } else { | |
576 | if (num_of_ant == 3) | |
577 | tbl->lq_type = LQ_MIMO3; | |
578 | } | |
b481de9c ZY |
579 | } |
580 | return 0; | |
581 | } | |
aade00ce GC |
582 | |
583 | /* switch to another antenna/antennas and return 1 */ | |
584 | /* if no other valid antenna found, return 0 */ | |
585 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 586 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 587 | { |
aade00ce GC |
588 | u8 new_ant_type; |
589 | ||
590 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
591 | return 0; | |
592 | ||
593 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
594 | return 0; | |
595 | ||
596 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
597 | ||
598 | while ((new_ant_type != tbl->ant_type) && | |
599 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
600 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
601 | ||
602 | if (new_ant_type == tbl->ant_type) | |
603 | return 0; | |
604 | ||
605 | tbl->ant_type = new_ant_type; | |
606 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
607 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
608 | return 1; | |
b481de9c ZY |
609 | } |
610 | ||
39e88504 | 611 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 612 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
613 | #if 0 |
614 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 615 | { |
3ac7f146 | 616 | return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
270243a5 | 617 | priv->current_ht_config.is_green_field && |
3ac7f146 | 618 | !priv->current_ht_config.non_GF_STA_present; |
f935a6da | 619 | } |
4f85f5b3 | 620 | #endif |
f935a6da GC |
621 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
622 | { | |
dc2453ae | 623 | return 0; |
b481de9c ZY |
624 | } |
625 | ||
626 | /** | |
627 | * rs_get_supported_rates - get the available rates | |
628 | * | |
629 | * if management frame or broadcast frame only return | |
630 | * basic available rates. | |
631 | * | |
632 | */ | |
e227ceac TW |
633 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
634 | struct ieee80211_hdr *hdr, | |
635 | enum iwl_table_type rate_type) | |
b481de9c | 636 | { |
eecd6e57 GC |
637 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
638 | lq_sta->active_rate_basic) | |
639 | return lq_sta->active_rate_basic; | |
640 | ||
641 | if (is_legacy(rate_type)) { | |
642 | return lq_sta->active_legacy_rate; | |
643 | } else { | |
b481de9c | 644 | if (is_siso(rate_type)) |
eecd6e57 | 645 | return lq_sta->active_siso_rate; |
fde0db31 | 646 | else if (is_mimo2(rate_type)) |
eecd6e57 | 647 | return lq_sta->active_mimo2_rate; |
b481de9c | 648 | else |
eecd6e57 | 649 | return lq_sta->active_mimo3_rate; |
c33104f0 | 650 | } |
b481de9c ZY |
651 | } |
652 | ||
bf403db8 EK |
653 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
654 | int rate_type) | |
b481de9c ZY |
655 | { |
656 | u8 high = IWL_RATE_INVALID; | |
657 | u8 low = IWL_RATE_INVALID; | |
658 | ||
01ebd063 | 659 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
660 | * the rate table */ |
661 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
662 | int i; | |
663 | u32 mask; | |
664 | ||
665 | /* Find the previous rate that is in the rate mask */ | |
666 | i = index - 1; | |
667 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
668 | if (rate_mask & mask) { | |
669 | low = i; | |
670 | break; | |
671 | } | |
672 | } | |
673 | ||
674 | /* Find the next rate that is in the rate mask */ | |
675 | i = index + 1; | |
676 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
677 | if (rate_mask & mask) { | |
678 | high = i; | |
679 | break; | |
680 | } | |
681 | } | |
682 | ||
683 | return (high << 8) | low; | |
684 | } | |
685 | ||
686 | low = index; | |
687 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 688 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
689 | if (low == IWL_RATE_INVALID) |
690 | break; | |
691 | if (rate_mask & (1 << low)) | |
692 | break; | |
693 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
694 | } | |
695 | ||
696 | high = index; | |
697 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 698 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
699 | if (high == IWL_RATE_INVALID) |
700 | break; | |
701 | if (rate_mask & (1 << high)) | |
702 | break; | |
703 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
704 | } | |
705 | ||
706 | return (high << 8) | low; | |
707 | } | |
708 | ||
e227ceac TW |
709 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
710 | struct iwl_scale_tbl_info *tbl, | |
711 | u8 scale_index, u8 ht_possible) | |
b481de9c | 712 | { |
b481de9c ZY |
713 | s32 low; |
714 | u16 rate_mask; | |
715 | u16 high_low; | |
716 | u8 switch_to_legacy = 0; | |
c33104f0 | 717 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
718 | |
719 | /* check if we need to switch from HT to legacy rates. | |
720 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
721 | * are always supported (spec demand) */ | |
722 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
723 | switch_to_legacy = 1; | |
724 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 725 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
726 | tbl->lq_type = LQ_A; |
727 | else | |
728 | tbl->lq_type = LQ_G; | |
729 | ||
69fdb309 | 730 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 731 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
732 | |
733 | tbl->is_fat = 0; | |
734 | tbl->is_SGI = 0; | |
735 | } | |
736 | ||
eecd6e57 | 737 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 738 | |
77626355 | 739 | /* Mask with station rate restriction */ |
b481de9c | 740 | if (is_legacy(tbl->lq_type)) { |
77626355 | 741 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 742 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 743 | rate_mask = (u16)(rate_mask & |
c33104f0 | 744 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 745 | else |
c33104f0 | 746 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
747 | } |
748 | ||
77626355 | 749 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 750 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
751 | low = scale_index; |
752 | goto out; | |
b481de9c ZY |
753 | } |
754 | ||
bf403db8 EK |
755 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
756 | tbl->lq_type); | |
b481de9c ZY |
757 | low = high_low & 0xff; |
758 | ||
39e88504 GC |
759 | if (low == IWL_RATE_INVALID) |
760 | low = scale_index; | |
761 | ||
762 | out: | |
763 | return rate_n_flags_from_tbl(tbl, low, is_green); | |
b481de9c ZY |
764 | } |
765 | ||
77626355 BC |
766 | /* |
767 | * mac80211 sends us Tx status | |
768 | */ | |
4b7679a5 JB |
769 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
770 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 771 | struct sk_buff *skb) |
b481de9c ZY |
772 | { |
773 | int status; | |
774 | u8 retries; | |
775 | int rs_index, index = 0; | |
e227ceac | 776 | struct iwl_lq_sta *lq_sta; |
66c73db7 | 777 | struct iwl_link_quality_cmd *table; |
b481de9c | 778 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 JB |
779 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
780 | struct ieee80211_hw *hw = priv->hw; | |
e039fa4a | 781 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac TW |
782 | struct iwl_rate_scale_data *window = NULL; |
783 | struct iwl_rate_scale_data *search_win = NULL; | |
39e88504 | 784 | u32 tx_rate; |
e227ceac TW |
785 | struct iwl_scale_tbl_info tbl_type; |
786 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c | 787 | u8 active_index = 0; |
fd7c8a40 | 788 | __le16 fc = hdr->frame_control; |
b481de9c ZY |
789 | s32 tpt = 0; |
790 | ||
58826351 | 791 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
792 | |
793 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
794 | return; | |
795 | ||
99556438 | 796 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
797 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
798 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
799 | return; |
800 | ||
e039fa4a | 801 | retries = info->status.retry_count; |
b481de9c ZY |
802 | |
803 | if (retries > 15) | |
804 | retries = 15; | |
805 | ||
4b7679a5 | 806 | lq_sta = (struct iwl_lq_sta *)priv_sta; |
b481de9c | 807 | |
05c914fe | 808 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 809 | !lq_sta->ibss_sta_added) |
f4d6082d | 810 | goto out; |
b481de9c | 811 | |
c33104f0 TW |
812 | table = &lq_sta->lq; |
813 | active_index = lq_sta->active_tbl; | |
b481de9c | 814 | |
c33104f0 TW |
815 | curr_tbl = &(lq_sta->lq_info[active_index]); |
816 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
e227ceac TW |
817 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
818 | search_win = (struct iwl_rate_scale_data *)&(search_tbl->win[0]); | |
b481de9c | 819 | |
77626355 BC |
820 | /* |
821 | * Ignore this Tx frame response if its initial rate doesn't match | |
822 | * that of latest Link Quality command. There may be stragglers | |
823 | * from a previous Link Quality command, but we're no longer interested | |
824 | * in those; they're either from the "active" mode while we're trying | |
825 | * to check "search" mode, or a prior "search" mode after we've moved | |
826 | * to a new "search" mode (which might become the new "active" mode). | |
827 | */ | |
39e88504 GC |
828 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
829 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
830 | if (priv->band == IEEE80211_BAND_5GHZ) |
831 | rs_index -= IWL_FIRST_OFDM_RATE; | |
832 | ||
e039fa4a | 833 | if ((info->tx_rate_idx < 0) || |
4c424e4c | 834 | (tbl_type.is_SGI ^ |
e039fa4a | 835 | !!(info->flags & IEEE80211_TX_CTL_SHORT_GI)) || |
4c424e4c | 836 | (tbl_type.is_fat ^ |
e039fa4a | 837 | !!(info->flags & IEEE80211_TX_CTL_40_MHZ_WIDTH)) || |
4c424e4c | 838 | (tbl_type.is_dup ^ |
e039fa4a JB |
839 | !!(info->flags & IEEE80211_TX_CTL_DUP_DATA)) || |
840 | (tbl_type.ant_type ^ info->antenna_sel_tx) || | |
39e88504 | 841 | (!!(tx_rate & RATE_MCS_HT_MSK) ^ |
e039fa4a | 842 | !!(info->flags & IEEE80211_TX_CTL_OFDM_HT)) || |
39e88504 | 843 | (!!(tx_rate & RATE_MCS_GF_MSK) ^ |
e039fa4a | 844 | !!(info->flags & IEEE80211_TX_CTL_GREEN_FIELD)) || |
4c424e4c | 845 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e039fa4a | 846 | hw->wiphy->bands[info->band]->bitrates[info->tx_rate_idx].bitrate)) { |
39e88504 | 847 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
f4d6082d | 848 | goto out; |
b481de9c ZY |
849 | } |
850 | ||
77626355 | 851 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 852 | while (retries) { |
77626355 BC |
853 | /* Look up the rate and other info used for each tx attempt. |
854 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
855 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
856 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
857 | &tbl_type, &rs_index); |
858 | ||
77626355 BC |
859 | /* If type matches "search" table, |
860 | * add failure to "search" history */ | |
b481de9c | 861 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 862 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
863 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
864 | if (search_tbl->expected_tpt) | |
865 | tpt = search_tbl->expected_tpt[rs_index]; | |
866 | else | |
867 | tpt = 0; | |
99556438 | 868 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
869 | |
870 | /* Else if type matches "current/active" table, | |
871 | * add failure to "current/active" history */ | |
b481de9c | 872 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 873 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
874 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
875 | if (curr_tbl->expected_tpt) | |
876 | tpt = curr_tbl->expected_tpt[rs_index]; | |
877 | else | |
878 | tpt = 0; | |
99556438 | 879 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 880 | } |
77626355 BC |
881 | |
882 | /* If not searching for a new mode, increment failed counter | |
883 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
884 | if (lq_sta->stay_in_tbl) |
885 | lq_sta->total_failed++; | |
b481de9c ZY |
886 | --retries; |
887 | index++; | |
888 | ||
889 | } | |
890 | ||
77626355 BC |
891 | /* |
892 | * Find (by rate) the history window to update with final Tx attempt; | |
893 | * if Tx was successful first try, use original rate, | |
894 | * else look up the rate that was, finally, successful. | |
895 | */ | |
39e88504 GC |
896 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
897 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 898 | |
77626355 | 899 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 900 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 901 | |
77626355 BC |
902 | /* If type matches "search" table, |
903 | * add final tx status to "search" history */ | |
b481de9c | 904 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 905 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
906 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
907 | if (search_tbl->expected_tpt) | |
908 | tpt = search_tbl->expected_tpt[rs_index]; | |
909 | else | |
910 | tpt = 0; | |
e039fa4a | 911 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 912 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
913 | info->status.ampdu_ack_len, |
914 | info->status.ampdu_ack_map); | |
99556438 RR |
915 | else |
916 | rs_collect_tx_data(search_win, rs_index, tpt, | |
917 | 1, status); | |
77626355 BC |
918 | /* Else if type matches "current/active" table, |
919 | * add final tx status to "current/active" history */ | |
b481de9c | 920 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 921 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
922 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
923 | if (curr_tbl->expected_tpt) | |
924 | tpt = curr_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(window, 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(window, rs_index, tpt, | |
933 | 1, status); | |
b481de9c ZY |
934 | } |
935 | ||
77626355 BC |
936 | /* If not searching for new mode, increment success/failed counter |
937 | * ... these help determine when to start searching again */ | |
c33104f0 | 938 | if (lq_sta->stay_in_tbl) { |
e039fa4a JB |
939 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
940 | lq_sta->total_success += info->status.ampdu_ack_map; | |
99556438 | 941 | lq_sta->total_failed += |
e039fa4a | 942 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
943 | } else { |
944 | if (status) | |
945 | lq_sta->total_success++; | |
946 | else | |
947 | lq_sta->total_failed++; | |
948 | } | |
b481de9c ZY |
949 | } |
950 | ||
77626355 | 951 | /* See if there's a better rate or modulation mode to try. */ |
4b7679a5 | 952 | rs_rate_scale_perform(priv, hdr, sta, lq_sta); |
f4d6082d | 953 | out: |
b481de9c ZY |
954 | return; |
955 | } | |
956 | ||
77626355 BC |
957 | /* |
958 | * Begin a period of staying with a selected modulation mode. | |
959 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
960 | * Set frame tx success limits according to legacy vs. high-throughput, | |
961 | * and reset overall (spanning all rates) tx success history statistics. | |
962 | * These control how long we stay using same modulation mode before | |
963 | * searching for a new mode. | |
964 | */ | |
bf403db8 | 965 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 966 | struct iwl_lq_sta *lq_sta) |
b481de9c | 967 | { |
eecd6e57 | 968 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 969 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 970 | if (is_legacy) { |
c33104f0 TW |
971 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
972 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
973 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 974 | } else { |
c33104f0 TW |
975 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
976 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
977 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 978 | } |
c33104f0 TW |
979 | lq_sta->table_count = 0; |
980 | lq_sta->total_failed = 0; | |
981 | lq_sta->total_success = 0; | |
b481de9c ZY |
982 | } |
983 | ||
77626355 BC |
984 | /* |
985 | * Find correct throughput table for given mode of modulation | |
986 | */ | |
e227ceac TW |
987 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
988 | struct iwl_scale_tbl_info *tbl) | |
b481de9c ZY |
989 | { |
990 | if (is_legacy(tbl->lq_type)) { | |
991 | if (!is_a_band(tbl->lq_type)) | |
992 | tbl->expected_tpt = expected_tpt_G; | |
993 | else | |
994 | tbl->expected_tpt = expected_tpt_A; | |
995 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 996 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
997 | if (tbl->is_SGI) |
998 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
999 | else | |
1000 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1001 | else if (tbl->is_SGI) | |
1002 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1003 | else | |
1004 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1005 | ||
fde0db31 | 1006 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1007 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1008 | if (tbl->is_SGI) |
1009 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1010 | else | |
1011 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1012 | else if (tbl->is_SGI) | |
1013 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1014 | else | |
1015 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1016 | } else | |
1017 | tbl->expected_tpt = expected_tpt_G; | |
1018 | } | |
1019 | ||
77626355 BC |
1020 | /* |
1021 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1022 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1023 | * above the current measured throughput of "active" mode, to give new mode | |
1024 | * a fair chance to prove itself without too many challenges. | |
1025 | * | |
1026 | * This gets called when transitioning to more aggressive modulation | |
1027 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1028 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1029 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1030 | * bit rate will typically need to increase, but not if performance was bad. | |
1031 | */ | |
c79dd5b5 | 1032 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1033 | struct iwl_lq_sta *lq_sta, |
1034 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1035 | u16 rate_mask, s8 index) |
b481de9c | 1036 | { |
77626355 | 1037 | /* "active" values */ |
e227ceac | 1038 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1039 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1040 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1041 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1042 | |
1043 | /* expected "search" throughput */ | |
1044 | s32 *tpt_tbl = tbl->expected_tpt; | |
1045 | ||
1046 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1047 | u16 high_low; |
f935a6da | 1048 | s8 rate = index; |
b481de9c ZY |
1049 | |
1050 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1051 | ||
1052 | for (; ;) { | |
bf403db8 EK |
1053 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1054 | tbl->lq_type); | |
b481de9c ZY |
1055 | |
1056 | low = high_low & 0xff; | |
1057 | high = (high_low >> 8) & 0xff; | |
1058 | ||
77626355 BC |
1059 | /* |
1060 | * Lower the "search" bit rate, to give new "search" mode | |
1061 | * approximately the same throughput as "active" if: | |
1062 | * | |
1063 | * 1) "Active" mode has been working modestly well (but not | |
1064 | * great), and expected "search" throughput (under perfect | |
1065 | * conditions) at candidate rate is above the actual | |
1066 | * measured "active" throughput (but less than expected | |
1067 | * "active" throughput under perfect conditions). | |
1068 | * OR | |
1069 | * 2) "Active" mode has been working perfectly or very well | |
1070 | * and expected "search" throughput (under perfect | |
1071 | * conditions) at candidate rate is above expected | |
1072 | * "active" throughput (under perfect conditions). | |
1073 | */ | |
c33104f0 | 1074 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1075 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1076 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1077 | (tpt_tbl[rate] <= active_tpt))) || | |
1078 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1079 | (tpt_tbl[rate] > active_tpt))) { | |
1080 | ||
77626355 BC |
1081 | /* (2nd or later pass) |
1082 | * If we've already tried to raise the rate, and are | |
1083 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1084 | if (start_hi != IWL_RATE_INVALID) { |
1085 | new_rate = start_hi; | |
1086 | break; | |
1087 | } | |
77626355 | 1088 | |
b481de9c | 1089 | new_rate = rate; |
77626355 BC |
1090 | |
1091 | /* Loop again with lower rate */ | |
b481de9c ZY |
1092 | if (low != IWL_RATE_INVALID) |
1093 | rate = low; | |
77626355 BC |
1094 | |
1095 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1096 | else |
1097 | break; | |
77626355 BC |
1098 | |
1099 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1100 | } else { |
77626355 BC |
1101 | /* (2nd or later pass) |
1102 | * If we've already tried to lower the rate, and are | |
1103 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1104 | if (new_rate != IWL_RATE_INVALID) |
1105 | break; | |
77626355 BC |
1106 | |
1107 | /* Loop again with higher rate */ | |
b481de9c ZY |
1108 | else if (high != IWL_RATE_INVALID) { |
1109 | start_hi = high; | |
1110 | rate = high; | |
77626355 BC |
1111 | |
1112 | /* Higher rate not available, use the original */ | |
b481de9c | 1113 | } else { |
90d7795e | 1114 | new_rate = rate; |
b481de9c ZY |
1115 | break; |
1116 | } | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | return new_rate; | |
1121 | } | |
b481de9c | 1122 | |
77626355 BC |
1123 | /* |
1124 | * Set up search table for MIMO | |
1125 | */ | |
fde0db31 | 1126 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1127 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1128 | struct ieee80211_conf *conf, |
4b7679a5 | 1129 | struct ieee80211_sta *sta, |
e227ceac | 1130 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1131 | { |
b481de9c ZY |
1132 | u16 rate_mask; |
1133 | s32 rate; | |
c33104f0 | 1134 | s8 is_green = lq_sta->is_green; |
b481de9c | 1135 | |
270243a5 | 1136 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
4b7679a5 | 1137 | !sta->ht_info.ht_supported) |
b481de9c ZY |
1138 | return -1; |
1139 | ||
4b7679a5 | 1140 | if (((sta->ht_info.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1141 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1142 | return -1; |
1143 | ||
77626355 | 1144 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1145 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1146 | return -1; |
1147 | ||
eecd6e57 | 1148 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1149 | |
1150 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1151 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1152 | tbl->action = 0; |
39e88504 GC |
1153 | rate_mask = lq_sta->active_mimo2_rate; |
1154 | ||
270243a5 | 1155 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1156 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1157 | tbl->is_fat = 1; |
1158 | else | |
1159 | tbl->is_fat = 0; | |
1160 | ||
39e88504 | 1161 | /* FIXME: - don't toggle SGI here |
b481de9c | 1162 | if (tbl->is_fat) { |
270243a5 | 1163 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1164 | tbl->is_SGI = 1; |
1165 | else | |
1166 | tbl->is_SGI = 0; | |
270243a5 | 1167 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1168 | tbl->is_SGI = 1; |
1169 | else | |
1170 | tbl->is_SGI = 0; | |
39e88504 | 1171 | */ |
b481de9c | 1172 | |
eecd6e57 | 1173 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1174 | |
f935a6da | 1175 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1176 | |
eecd6e57 | 1177 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1178 | |
1179 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1180 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1181 | rate, rate_mask); |
b481de9c | 1182 | return -1; |
39e88504 GC |
1183 | } |
1184 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); | |
b481de9c | 1185 | |
eecd6e57 | 1186 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1187 | tbl->current_rate, is_green); |
dc2453ae | 1188 | return 0; |
fde0db31 | 1189 | } |
b481de9c | 1190 | |
77626355 BC |
1191 | /* |
1192 | * Set up search table for SISO | |
1193 | */ | |
c79dd5b5 | 1194 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1195 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1196 | struct ieee80211_conf *conf, |
4b7679a5 | 1197 | struct ieee80211_sta *sta, |
e227ceac | 1198 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1199 | { |
b481de9c | 1200 | u16 rate_mask; |
c33104f0 | 1201 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1202 | s32 rate; |
1203 | ||
270243a5 | 1204 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
4b7679a5 | 1205 | !sta->ht_info.ht_supported) |
b481de9c ZY |
1206 | return -1; |
1207 | ||
eecd6e57 | 1208 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1209 | |
c33104f0 | 1210 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1211 | tbl->lq_type = LQ_SISO; |
1212 | tbl->action = 0; | |
39e88504 | 1213 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1214 | |
270243a5 RR |
1215 | if (priv->current_ht_config.supported_chan_width |
1216 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1217 | tbl->is_fat = 1; |
1218 | else | |
1219 | tbl->is_fat = 0; | |
1220 | ||
39e88504 | 1221 | /* FIXME: - don't toggle SGI here |
b481de9c | 1222 | if (tbl->is_fat) { |
270243a5 | 1223 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1224 | tbl->is_SGI = 1; |
1225 | else | |
1226 | tbl->is_SGI = 0; | |
270243a5 | 1227 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1228 | tbl->is_SGI = 1; |
1229 | else | |
1230 | tbl->is_SGI = 0; | |
39e88504 | 1231 | */ |
b481de9c ZY |
1232 | |
1233 | if (is_green) | |
39e88504 | 1234 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1235 | |
eecd6e57 | 1236 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1237 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1238 | |
eecd6e57 | 1239 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1240 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1241 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1242 | rate, rate_mask); |
1243 | return -1; | |
1244 | } | |
39e88504 | 1245 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); |
eecd6e57 | 1246 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1247 | tbl->current_rate, is_green); |
403ab56b | 1248 | return 0; |
b481de9c ZY |
1249 | } |
1250 | ||
77626355 BC |
1251 | /* |
1252 | * Try to switch to new modulation mode from legacy | |
1253 | */ | |
c79dd5b5 | 1254 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1255 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1256 | struct ieee80211_conf *conf, |
4b7679a5 | 1257 | struct ieee80211_sta *sta, |
b481de9c ZY |
1258 | int index) |
1259 | { | |
e227ceac TW |
1260 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1261 | struct iwl_scale_tbl_info *search_tbl = | |
1262 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1263 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1264 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1265 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1266 | u8 start_action = tbl->action; |
fde0db31 | 1267 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1268 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1269 | int ret = 0; |
b481de9c ZY |
1270 | |
1271 | for (; ;) { | |
1272 | switch (tbl->action) { | |
3110bef7 GC |
1273 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1274 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
f935a6da | 1275 | IWL_DEBUG_RATE("LQ: Legacy toggle Antenna\n"); |
b481de9c | 1276 | |
c33104f0 | 1277 | lq_sta->action_counter++; |
77626355 | 1278 | |
3110bef7 GC |
1279 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1280 | tx_chains_num <= 1) || | |
1281 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1282 | tx_chains_num <= 2)) | |
1283 | break; | |
1284 | ||
77626355 | 1285 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1286 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1287 | break; | |
77626355 | 1288 | |
77626355 | 1289 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1290 | memcpy(search_tbl, tbl, sz); |
1291 | ||
aade00ce GC |
1292 | if (rs_toggle_antenna(valid_tx_ant, |
1293 | &search_tbl->current_rate, search_tbl)) { | |
3110bef7 | 1294 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1295 | goto out; |
1296 | } | |
a5e8b505 | 1297 | break; |
b481de9c | 1298 | case IWL_LEGACY_SWITCH_SISO: |
eecd6e57 | 1299 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1300 | |
1301 | /* Set up search table to try SISO */ | |
b481de9c | 1302 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1303 | search_tbl->is_SGI = 0; |
c33104f0 | 1304 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1305 | search_tbl, index); |
dc2453ae | 1306 | if (!ret) { |
c33104f0 | 1307 | lq_sta->action_counter = 0; |
b481de9c | 1308 | goto out; |
dc2453ae | 1309 | } |
b481de9c ZY |
1310 | |
1311 | break; | |
3110bef7 GC |
1312 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1313 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1314 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
eecd6e57 | 1315 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1316 | |
1317 | /* Set up search table to try MIMO */ | |
b481de9c | 1318 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1319 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1320 | |
1321 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1322 | search_tbl->ant_type = ANT_AB; | |
1323 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1324 | search_tbl->ant_type = ANT_AC; | |
1325 | else | |
1326 | search_tbl->ant_type = ANT_BC; | |
1327 | ||
1328 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1329 | break; | |
1330 | ||
fde0db31 | 1331 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1332 | search_tbl, index); |
dc2453ae | 1333 | if (!ret) { |
c33104f0 | 1334 | lq_sta->action_counter = 0; |
b481de9c | 1335 | goto out; |
dc2453ae | 1336 | } |
b481de9c ZY |
1337 | break; |
1338 | } | |
1339 | tbl->action++; | |
3110bef7 GC |
1340 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1341 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1342 | |
1343 | if (tbl->action == start_action) | |
1344 | break; | |
1345 | ||
1346 | } | |
3110bef7 | 1347 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1348 | return 0; |
1349 | ||
3110bef7 GC |
1350 | out: |
1351 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1352 | tbl->action++; |
3110bef7 GC |
1353 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1354 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1355 | return 0; |
1356 | ||
1357 | } | |
1358 | ||
77626355 BC |
1359 | /* |
1360 | * Try to switch to new modulation mode from SISO | |
1361 | */ | |
c79dd5b5 | 1362 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1363 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1364 | struct ieee80211_conf *conf, |
4b7679a5 | 1365 | struct ieee80211_sta *sta, int index) |
b481de9c | 1366 | { |
c33104f0 | 1367 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1368 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1369 | struct iwl_scale_tbl_info *search_tbl = | |
1370 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1371 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1372 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1373 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1374 | u8 start_action = tbl->action; |
fde0db31 | 1375 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1376 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1377 | int ret; |
b481de9c ZY |
1378 | |
1379 | for (;;) { | |
c33104f0 | 1380 | lq_sta->action_counter++; |
b481de9c | 1381 | switch (tbl->action) { |
3110bef7 GC |
1382 | case IWL_SISO_SWITCH_ANTENNA1: |
1383 | case IWL_SISO_SWITCH_ANTENNA2: | |
eecd6e57 | 1384 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1385 | |
1386 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1387 | tx_chains_num <= 1) || | |
1388 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1389 | tx_chains_num <= 2)) | |
1390 | break; | |
1391 | ||
b481de9c ZY |
1392 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1393 | break; | |
b481de9c ZY |
1394 | |
1395 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1396 | if (rs_toggle_antenna(valid_tx_ant, |
3110bef7 | 1397 | &search_tbl->current_rate, search_tbl)) |
aade00ce | 1398 | goto out; |
a5e8b505 | 1399 | break; |
3110bef7 GC |
1400 | case IWL_SISO_SWITCH_MIMO2_AB: |
1401 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1402 | case IWL_SISO_SWITCH_MIMO2_BC: | |
a5e8b505 | 1403 | IWL_DEBUG_RATE("LQ: SISO switch to MIMO2\n"); |
b481de9c | 1404 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1405 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1406 | |
1407 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1408 | search_tbl->ant_type = ANT_AB; | |
1409 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1410 | search_tbl->ant_type = ANT_AC; | |
1411 | else | |
1412 | search_tbl->ant_type = ANT_BC; | |
1413 | ||
1414 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1415 | break; | |
1416 | ||
fde0db31 | 1417 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1418 | search_tbl, index); |
3110bef7 | 1419 | if (!ret) |
b481de9c ZY |
1420 | goto out; |
1421 | break; | |
1422 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1423 | if (!tbl->is_fat && |
1424 | !(priv->current_ht_config.sgf & | |
1425 | HT_SHORT_GI_20MHZ)) | |
1426 | break; | |
1427 | if (tbl->is_fat && | |
1428 | !(priv->current_ht_config.sgf & | |
1429 | HT_SHORT_GI_40MHZ)) | |
1430 | break; | |
1431 | ||
eecd6e57 | 1432 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1433 | |
b481de9c | 1434 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1435 | if (is_green) { |
1436 | if (!tbl->is_SGI) | |
1437 | break; | |
1438 | else | |
1439 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1440 | } |
39e88504 | 1441 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1442 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1443 | if (tbl->is_SGI) { |
1444 | s32 tpt = lq_sta->last_tpt / 100; | |
1445 | if (tpt >= search_tbl->expected_tpt[index]) | |
1446 | break; | |
1447 | } | |
1448 | search_tbl->current_rate = rate_n_flags_from_tbl( | |
1449 | search_tbl, index, is_green); | |
b481de9c ZY |
1450 | goto out; |
1451 | } | |
1452 | tbl->action++; | |
1453 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1454 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1455 | |
1456 | if (tbl->action == start_action) | |
1457 | break; | |
1458 | } | |
3110bef7 | 1459 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1460 | return 0; |
1461 | ||
1462 | out: | |
3110bef7 | 1463 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1464 | tbl->action++; |
1465 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1466 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1467 | return 0; |
1468 | } | |
1469 | ||
77626355 BC |
1470 | /* |
1471 | * Try to switch to new modulation mode from MIMO | |
1472 | */ | |
c79dd5b5 | 1473 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
e227ceac | 1474 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1475 | struct ieee80211_conf *conf, |
4b7679a5 | 1476 | struct ieee80211_sta *sta, int index) |
b481de9c | 1477 | { |
c33104f0 | 1478 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1479 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1480 | struct iwl_scale_tbl_info *search_tbl = | |
1481 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1482 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
e227ceac TW |
1483 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1484 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1485 | u8 start_action = tbl->action; |
3110bef7 GC |
1486 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1487 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
aade00ce | 1488 | int ret; |
b481de9c ZY |
1489 | |
1490 | for (;;) { | |
c33104f0 | 1491 | lq_sta->action_counter++; |
b481de9c | 1492 | switch (tbl->action) { |
3110bef7 GC |
1493 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1494 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
1495 | IWL_DEBUG_RATE("LQ: MIMO toggle Antennas\n"); | |
1496 | ||
1497 | if (tx_chains_num <= 2) | |
1498 | break; | |
1499 | ||
1500 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1501 | break; | |
1502 | ||
1503 | memcpy(search_tbl, tbl, sz); | |
1504 | if (rs_toggle_antenna(valid_tx_ant, | |
1505 | &search_tbl->current_rate, search_tbl)) | |
1506 | goto out; | |
1507 | break; | |
1508 | case IWL_MIMO2_SWITCH_SISO_A: | |
1509 | case IWL_MIMO2_SWITCH_SISO_B: | |
1510 | case IWL_MIMO2_SWITCH_SISO_C: | |
eecd6e57 | 1511 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1512 | |
77626355 | 1513 | /* Set up new search table for SISO */ |
b481de9c | 1514 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1515 | |
3110bef7 | 1516 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1517 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1518 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1519 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1520 | else |
1521 | search_tbl->ant_type = ANT_C; | |
1522 | ||
1523 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1524 | break; | |
b481de9c | 1525 | |
c33104f0 | 1526 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1527 | search_tbl, index); |
3110bef7 | 1528 | if (!ret) |
b481de9c | 1529 | goto out; |
3110bef7 | 1530 | |
b481de9c ZY |
1531 | break; |
1532 | ||
3110bef7 | 1533 | case IWL_MIMO2_SWITCH_GI: |
a9841013 EG |
1534 | if (!tbl->is_fat && |
1535 | !(priv->current_ht_config.sgf & | |
1536 | HT_SHORT_GI_20MHZ)) | |
1537 | break; | |
1538 | if (tbl->is_fat && | |
1539 | !(priv->current_ht_config.sgf & | |
1540 | HT_SHORT_GI_40MHZ)) | |
1541 | break; | |
1542 | ||
eecd6e57 | 1543 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1544 | |
1545 | /* Set up new search table for MIMO */ | |
b481de9c | 1546 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1547 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1548 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1549 | /* |
1550 | * If active table already uses the fastest possible | |
1551 | * modulation (dual stream with short guard interval), | |
1552 | * and it's working well, there's no need to look | |
1553 | * for a better type of modulation! | |
1554 | */ | |
39e88504 | 1555 | if (tbl->is_SGI) { |
c33104f0 | 1556 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1557 | if (tpt >= search_tbl->expected_tpt[index]) |
1558 | break; | |
b481de9c | 1559 | } |
39e88504 GC |
1560 | search_tbl->current_rate = rate_n_flags_from_tbl( |
1561 | search_tbl, index, is_green); | |
b481de9c ZY |
1562 | goto out; |
1563 | ||
1564 | } | |
1565 | tbl->action++; | |
3110bef7 GC |
1566 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1567 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1568 | |
1569 | if (tbl->action == start_action) | |
1570 | break; | |
1571 | } | |
3110bef7 | 1572 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1573 | return 0; |
1574 | out: | |
3110bef7 | 1575 | lq_sta->search_better_tbl = 1; |
b481de9c | 1576 | tbl->action++; |
3110bef7 GC |
1577 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1578 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1579 | return 0; |
1580 | ||
1581 | } | |
1582 | ||
77626355 BC |
1583 | /* |
1584 | * Check whether we should continue using same modulation mode, or | |
1585 | * begin search for a new mode, based on: | |
1586 | * 1) # tx successes or failures while using this mode | |
1587 | * 2) # times calling this function | |
1588 | * 3) elapsed time in this mode (not used, for now) | |
1589 | */ | |
e227ceac | 1590 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1591 | { |
e227ceac | 1592 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1593 | int i; |
1594 | int active_tbl; | |
1595 | int flush_interval_passed = 0; | |
bf403db8 | 1596 | struct iwl_priv *priv; |
b481de9c | 1597 | |
bf403db8 | 1598 | priv = lq_sta->drv; |
c33104f0 | 1599 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1600 | |
c33104f0 | 1601 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1602 | |
77626355 | 1603 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1604 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1605 | |
77626355 | 1606 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1607 | if (lq_sta->flush_timer) |
b481de9c ZY |
1608 | flush_interval_passed = |
1609 | time_after(jiffies, | |
c33104f0 | 1610 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1611 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1612 | ||
77626355 BC |
1613 | /* |
1614 | * Check if we should allow search for new modulation mode. | |
1615 | * If many frames have failed or succeeded, or we've used | |
1616 | * this same modulation for a long time, allow search, and | |
1617 | * reset history stats that keep track of whether we should | |
1618 | * allow a new search. Also (below) reset all bitmaps and | |
1619 | * stats in active history. | |
1620 | */ | |
c33104f0 TW |
1621 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1622 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1623 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1624 | && (flush_interval_passed))) { |
eecd6e57 | 1625 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1626 | lq_sta->total_failed, |
1627 | lq_sta->total_success, | |
b481de9c | 1628 | flush_interval_passed); |
77626355 BC |
1629 | |
1630 | /* Allow search for new mode */ | |
c33104f0 TW |
1631 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1632 | lq_sta->total_failed = 0; | |
1633 | lq_sta->total_success = 0; | |
1634 | lq_sta->flush_timer = 0; | |
77626355 BC |
1635 | |
1636 | /* | |
1637 | * Else if we've used this modulation mode enough repetitions | |
1638 | * (regardless of elapsed time or success/failure), reset | |
1639 | * history bitmaps and rate-specific stats for all rates in | |
1640 | * active table. | |
1641 | */ | |
403ab56b | 1642 | } else { |
c33104f0 TW |
1643 | lq_sta->table_count++; |
1644 | if (lq_sta->table_count >= | |
1645 | lq_sta->table_count_limit) { | |
1646 | lq_sta->table_count = 0; | |
b481de9c | 1647 | |
eecd6e57 | 1648 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1649 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1650 | rs_rate_scale_clear_window( | |
1651 | &(tbl->win[i])); | |
1652 | } | |
1653 | } | |
1654 | ||
77626355 BC |
1655 | /* If transitioning to allow "search", reset all history |
1656 | * bitmaps and stats in active table (this will become the new | |
1657 | * "search" table). */ | |
c33104f0 | 1658 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1659 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1660 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1661 | } | |
1662 | } | |
1663 | } | |
1664 | ||
77626355 BC |
1665 | /* |
1666 | * Do rate scaling and search for new modulation mode. | |
1667 | */ | |
c79dd5b5 | 1668 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 1669 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
1670 | struct ieee80211_sta *sta, |
1671 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 1672 | { |
4b7679a5 | 1673 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 1674 | struct ieee80211_conf *conf = &hw->conf; |
b481de9c ZY |
1675 | int low = IWL_RATE_INVALID; |
1676 | int high = IWL_RATE_INVALID; | |
1677 | int index; | |
1678 | int i; | |
e227ceac | 1679 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1680 | int current_tpt = IWL_INVALID_VALUE; |
1681 | int low_tpt = IWL_INVALID_VALUE; | |
1682 | int high_tpt = IWL_INVALID_VALUE; | |
1683 | u32 fail_count; | |
1684 | s8 scale_action = 0; | |
fd7c8a40 HH |
1685 | __le16 fc; |
1686 | u16 rate_mask; | |
b481de9c | 1687 | u8 update_lq = 0; |
e227ceac | 1688 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1689 | u16 rate_scale_index_msk = 0; |
39e88504 | 1690 | u32 rate; |
b481de9c ZY |
1691 | u8 is_green = 0; |
1692 | u8 active_tbl = 0; | |
1693 | u8 done_search = 0; | |
1694 | u16 high_low; | |
a5e8b505 | 1695 | s32 sr; |
0c11b4de | 1696 | u8 tid = MAX_TID_COUNT; |
b481de9c ZY |
1697 | |
1698 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1699 | ||
fd7c8a40 | 1700 | fc = hdr->frame_control; |
b481de9c ZY |
1701 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
1702 | /* Send management frames and broadcast/multicast data using | |
1703 | * lowest rate. */ | |
1704 | /* TODO: this could probably be improved.. */ | |
1705 | return; | |
1706 | } | |
1707 | ||
4b7679a5 | 1708 | if (!sta || !lq_sta) |
b481de9c ZY |
1709 | return; |
1710 | ||
4b7679a5 | 1711 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1712 | |
faa29718 RR |
1713 | tid = rs_tl_add_packet(lq_sta, hdr); |
1714 | ||
77626355 BC |
1715 | /* |
1716 | * Select rate-scale / modulation-mode table to work with in | |
1717 | * the rest of this function: "search" if searching for better | |
1718 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1719 | */ | |
c33104f0 TW |
1720 | if (!lq_sta->search_better_tbl) |
1721 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1722 | else |
c33104f0 | 1723 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1724 | |
c33104f0 TW |
1725 | tbl = &(lq_sta->lq_info[active_tbl]); |
1726 | is_green = lq_sta->is_green; | |
b481de9c | 1727 | |
77626355 | 1728 | /* current tx rate */ |
b7e35008 | 1729 | index = lq_sta->last_txrate_idx; |
b481de9c ZY |
1730 | |
1731 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1732 | tbl->lq_type); | |
1733 | ||
77626355 | 1734 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1735 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1736 | |
1737 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1738 | ||
1739 | /* mask with station rate restriction */ | |
1740 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1741 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1742 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1743 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1744 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1745 | else |
1746 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1747 | lq_sta->supp_rates); |
b481de9c ZY |
1748 | |
1749 | } else | |
1750 | rate_scale_index_msk = rate_mask; | |
1751 | ||
1752 | if (!rate_scale_index_msk) | |
1753 | rate_scale_index_msk = rate_mask; | |
1754 | ||
07bc28ed GC |
1755 | if (!((1 << index) & rate_scale_index_msk)) { |
1756 | IWL_ERROR("Current Rate is not valid\n"); | |
1757 | return; | |
b481de9c ZY |
1758 | } |
1759 | ||
77626355 | 1760 | /* Get expected throughput table and history window for current rate */ |
07bc28ed GC |
1761 | if (!tbl->expected_tpt) { |
1762 | IWL_ERROR("tbl->expected_tpt is NULL\n"); | |
1763 | return; | |
1764 | } | |
b481de9c ZY |
1765 | |
1766 | window = &(tbl->win[index]); | |
1767 | ||
77626355 BC |
1768 | /* |
1769 | * If there is not enough history to calculate actual average | |
1770 | * throughput, keep analyzing results of more tx frames, without | |
1771 | * changing rate or mode (bypass most of the rest of this function). | |
1772 | * Set up new rate table in uCode only if old rate is not supported | |
1773 | * in current association (use new rate found above). | |
1774 | */ | |
b481de9c | 1775 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1776 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1777 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1778 | IWL_DEBUG_RATE("LQ: still below TH. succ=%d total=%d " | |
b481de9c ZY |
1779 | "for index %d\n", |
1780 | window->success_counter, window->counter, index); | |
77626355 BC |
1781 | |
1782 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1783 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1784 | |
1785 | /* Should we stay with this modulation mode, | |
1786 | * or search for a new one? */ | |
c33104f0 | 1787 | rs_stay_in_table(lq_sta); |
77626355 | 1788 | |
b481de9c | 1789 | goto out; |
3110bef7 | 1790 | } |
b481de9c | 1791 | |
77626355 BC |
1792 | /* Else we have enough samples; calculate estimate of |
1793 | * actual average throughput */ | |
3110bef7 GC |
1794 | |
1795 | BUG_ON(window->average_tpt != ((window->success_ratio * | |
1796 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 1797 | |
77626355 | 1798 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1799 | if (lq_sta->search_better_tbl) { |
b481de9c | 1800 | |
77626355 BC |
1801 | /* If good success, continue using the "search" mode; |
1802 | * no need to send new link quality command, since we're | |
1803 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1804 | if (window->average_tpt > lq_sta->last_tpt) { |
1805 | ||
3110bef7 | 1806 | IWL_DEBUG_RATE("LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
1807 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1808 | window->success_ratio, | |
1809 | window->average_tpt, | |
1810 | lq_sta->last_tpt); | |
1811 | ||
1812 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1813 | lq_sta->enable_counter = 1; |
07bc28ed | 1814 | |
77626355 | 1815 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1816 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1817 | current_tpt = window->average_tpt; |
77626355 BC |
1818 | |
1819 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1820 | } else { |
07bc28ed GC |
1821 | |
1822 | IWL_DEBUG_RATE("LQ: GOING BACK TO THE OLD TABLE " | |
1823 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1824 | window->success_ratio, | |
1825 | window->average_tpt, | |
1826 | lq_sta->last_tpt); | |
1827 | ||
77626355 | 1828 | /* Nullify "search" table */ |
b481de9c | 1829 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1830 | |
1831 | /* Revert to "active" table */ | |
c33104f0 TW |
1832 | active_tbl = lq_sta->active_tbl; |
1833 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1834 | |
77626355 | 1835 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 1836 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 1837 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1838 | |
77626355 | 1839 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1840 | update_lq = 1; |
b481de9c | 1841 | } |
77626355 BC |
1842 | |
1843 | /* Either way, we've made a decision; modulation mode | |
1844 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1845 | lq_sta->search_better_tbl = 0; |
77626355 | 1846 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1847 | goto lq_update; |
1848 | } | |
1849 | ||
77626355 BC |
1850 | /* (Else) not in search of better modulation mode, try for better |
1851 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1852 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1853 | tbl->lq_type); |
1854 | low = high_low & 0xff; | |
1855 | high = (high_low >> 8) & 0xff; | |
1856 | ||
a5e8b505 GC |
1857 | sr = window->success_ratio; |
1858 | ||
77626355 | 1859 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1860 | current_tpt = window->average_tpt; |
b481de9c ZY |
1861 | if (low != IWL_RATE_INVALID) |
1862 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1863 | if (high != IWL_RATE_INVALID) |
1864 | high_tpt = tbl->win[high].average_tpt; | |
1865 | ||
a5e8b505 | 1866 | scale_action = 0; |
b481de9c | 1867 | |
77626355 | 1868 | /* Too many failures, decrease rate */ |
a5e8b505 | 1869 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
b481de9c ZY |
1870 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
1871 | scale_action = -1; | |
77626355 BC |
1872 | |
1873 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 1874 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
1875 | (high_tpt == IWL_INVALID_VALUE)) { |
1876 | ||
1877 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
1878 | scale_action = 1; | |
1879 | else if (low != IWL_RATE_INVALID) | |
1880 | scale_action = -1; | |
1881 | } | |
77626355 BC |
1882 | |
1883 | /* Both adjacent throughputs are measured, but neither one has better | |
1884 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1885 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1886 | (high_tpt != IWL_INVALID_VALUE) && | |
1887 | (low_tpt < current_tpt) && | |
1888 | (high_tpt < current_tpt)) | |
1889 | scale_action = 0; | |
77626355 BC |
1890 | |
1891 | /* At least one adjacent rate's throughput is measured, | |
1892 | * and may have better performance. */ | |
b481de9c | 1893 | else { |
77626355 | 1894 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1895 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1896 | /* Higher rate has better throughput */ |
a5e8b505 GC |
1897 | if (high_tpt > current_tpt && |
1898 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 1899 | scale_action = 1; |
a5e8b505 | 1900 | } else { |
b481de9c ZY |
1901 | IWL_DEBUG_RATE |
1902 | ("decrease rate because of high tpt\n"); | |
1903 | scale_action = -1; | |
1904 | } | |
77626355 BC |
1905 | |
1906 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1907 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1908 | /* Lower rate has better throughput */ |
b481de9c ZY |
1909 | if (low_tpt > current_tpt) { |
1910 | IWL_DEBUG_RATE | |
1911 | ("decrease rate because of low tpt\n"); | |
1912 | scale_action = -1; | |
a5e8b505 | 1913 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 1914 | scale_action = 1; |
a5e8b505 | 1915 | } |
b481de9c ZY |
1916 | } |
1917 | } | |
1918 | ||
77626355 BC |
1919 | /* Sanity check; asked for decrease, but success rate or throughput |
1920 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
1921 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
1922 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 1923 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
1924 | scale_action = 0; |
1925 | ||
1926 | switch (scale_action) { | |
1927 | case -1: | |
77626355 | 1928 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1929 | if (low != IWL_RATE_INVALID) { |
1930 | update_lq = 1; | |
1931 | index = low; | |
1932 | } | |
1933 | break; | |
1934 | case 1: | |
77626355 | 1935 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1936 | if (high != IWL_RATE_INVALID) { |
1937 | update_lq = 1; | |
1938 | index = high; | |
1939 | } | |
1940 | ||
1941 | break; | |
1942 | case 0: | |
77626355 | 1943 | /* No change */ |
b481de9c ZY |
1944 | default: |
1945 | break; | |
1946 | } | |
1947 | ||
eecd6e57 | 1948 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1949 | "high %d type %d\n", |
1950 | index, scale_action, low, high, tbl->lq_type); | |
1951 | ||
a5e8b505 | 1952 | lq_update: |
77626355 | 1953 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1954 | if (update_lq) { |
39e88504 | 1955 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
07bc28ed | 1956 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1957 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1958 | } |
77626355 BC |
1959 | |
1960 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1961 | rs_stay_in_table(lq_sta); |
b481de9c | 1962 | |
77626355 BC |
1963 | /* |
1964 | * Search for new modulation mode if we're: | |
1965 | * 1) Not changing rates right now | |
1966 | * 2) Not just finishing up a search | |
1967 | * 3) Allowing a new search | |
1968 | */ | |
47cfd463 | 1969 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 1970 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1971 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1972 | |
77626355 BC |
1973 | /* Select a new "search" modulation mode to try. |
1974 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1975 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1976 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1977 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1978 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1979 | else |
c33104f0 | 1980 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1981 | |
77626355 | 1982 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 1983 | if (lq_sta->search_better_tbl) { |
77626355 | 1984 | /* Access the "search" table, clear its history. */ |
c33104f0 | 1985 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
1986 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1987 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1988 | ||
77626355 | 1989 | /* Use new "search" start rate */ |
e7d326ac | 1990 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 1991 | |
eecd6e57 | 1992 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 | 1993 | tbl->current_rate, index); |
07bc28ed | 1994 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 1995 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1996 | } |
b481de9c | 1997 | |
77626355 BC |
1998 | /* If the "active" (non-search) mode was legacy, |
1999 | * and we've tried switching antennas, | |
2000 | * but we haven't been able to try HT modes (not available), | |
2001 | * stay with best antenna legacy modulation for a while | |
2002 | * before next round of mode comparisons. */ | |
c33104f0 | 2003 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 2004 | if (is_legacy(tbl1->lq_type) && |
270243a5 | 2005 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
c33104f0 TW |
2006 | (lq_sta->action_counter >= 1)) { |
2007 | lq_sta->action_counter = 0; | |
eecd6e57 | 2008 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
bf403db8 | 2009 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2010 | } |
2011 | ||
77626355 BC |
2012 | /* If we're in an HT mode, and all 3 mode switch actions |
2013 | * have been tried and compared, stay in this best modulation | |
2014 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2015 | if (lq_sta->enable_counter && |
2016 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2017 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2018 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2019 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 2020 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 2021 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 2022 | } |
c33104f0 | 2023 | lq_sta->action_counter = 0; |
bf403db8 | 2024 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2025 | } |
77626355 BC |
2026 | |
2027 | /* | |
2028 | * Else, don't search for a new modulation mode. | |
2029 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2030 | * 1) Not changing rates right now | |
2031 | * 2) Not just finishing up a search | |
2032 | * 3) flush timer is empty | |
2033 | */ | |
b481de9c | 2034 | } else { |
c33104f0 TW |
2035 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2036 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2037 | } |
2038 | ||
2039 | out: | |
39e88504 | 2040 | tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green); |
b481de9c | 2041 | i = index; |
b7e35008 | 2042 | lq_sta->last_txrate_idx = i; |
b481de9c | 2043 | |
b481de9c ZY |
2044 | return; |
2045 | } | |
2046 | ||
2047 | ||
c79dd5b5 | 2048 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2049 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2050 | struct ieee80211_sta *sta, |
2051 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2052 | { |
e227ceac | 2053 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2054 | int rate_idx; |
aade00ce | 2055 | int i; |
39e88504 | 2056 | u32 rate; |
aade00ce GC |
2057 | u8 use_green = rs_use_green(priv, conf); |
2058 | u8 active_tbl = 0; | |
2059 | u8 valid_tx_ant; | |
b481de9c | 2060 | |
4b7679a5 | 2061 | if (!sta || !lq_sta) |
b481de9c ZY |
2062 | goto out; |
2063 | ||
b7e35008 | 2064 | i = lq_sta->last_txrate_idx; |
b481de9c | 2065 | |
c33104f0 | 2066 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2067 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2068 | goto out; |
2069 | ||
aade00ce GC |
2070 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2071 | ||
c33104f0 TW |
2072 | if (!lq_sta->search_better_tbl) |
2073 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2074 | else |
c33104f0 | 2075 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2076 | |
c33104f0 | 2077 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2078 | |
2079 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2080 | i = 0; | |
2081 | ||
fde0db31 | 2082 | /* FIXME:RS: This is also wrong in 4965 */ |
1826dcc0 | 2083 | rate = iwl_rates[i].plcp; |
39e88504 GC |
2084 | rate |= RATE_MCS_ANT_B_MSK; |
2085 | rate &= ~RATE_MCS_ANT_A_MSK; | |
b481de9c ZY |
2086 | |
2087 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2088 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2089 | |
fde0db31 | 2090 | tbl->ant_type = ANT_B; |
39e88504 | 2091 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2092 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2093 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2094 | |
39e88504 GC |
2095 | rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green); |
2096 | tbl->current_rate = rate; | |
eecd6e57 | 2097 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2098 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2099 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2100 | out: |
2101 | return; | |
2102 | } | |
2103 | ||
4b7679a5 JB |
2104 | static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband, |
2105 | struct ieee80211_sta *sta, void *priv_sta, | |
2106 | struct sk_buff *skb, struct rate_selection *sel) | |
b481de9c ZY |
2107 | { |
2108 | ||
2109 | int i; | |
4b7679a5 JB |
2110 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2111 | struct ieee80211_conf *conf = &priv->hw->conf; | |
b481de9c | 2112 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
fd7c8a40 | 2113 | __le16 fc; |
e227ceac | 2114 | struct iwl_lq_sta *lq_sta; |
b481de9c | 2115 | |
58826351 | 2116 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2117 | |
2bc454b0 MW |
2118 | /* Send management frames and broadcast/multicast data using lowest |
2119 | * rate. */ | |
fd7c8a40 | 2120 | fc = hdr->frame_control; |
2bc454b0 | 2121 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || |
4b7679a5 JB |
2122 | !sta || !priv_sta) { |
2123 | sel->rate_idx = rate_lowest_index(sband, sta); | |
2124 | return; | |
b481de9c ZY |
2125 | } |
2126 | ||
4b7679a5 | 2127 | lq_sta = (struct iwl_lq_sta *)priv_sta; |
b7e35008 | 2128 | i = lq_sta->last_txrate_idx; |
b481de9c | 2129 | |
05c914fe | 2130 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2131 | !lq_sta->ibss_sta_added) { |
947b13a7 | 2132 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
b481de9c ZY |
2133 | |
2134 | if (sta_id == IWL_INVALID_STATION) { | |
e174961c JB |
2135 | IWL_DEBUG_RATE("LQ: ADD station %pM\n", |
2136 | hdr->addr1); | |
4f40e4d9 | 2137 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2138 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2139 | } |
2140 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2141 | lq_sta->lq.sta_id = sta_id; |
2142 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2143 | lq_sta->ibss_sta_added = 1; | |
4b7679a5 | 2144 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c | 2145 | } |
b481de9c ZY |
2146 | } |
2147 | ||
1abbe498 | 2148 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
4b7679a5 JB |
2149 | sel->rate_idx = rate_lowest_index(sband, sta); |
2150 | return; | |
1abbe498 | 2151 | } |
b481de9c | 2152 | |
2e92e6f2 JB |
2153 | if (sband->band == IEEE80211_BAND_5GHZ) |
2154 | i -= IWL_FIRST_OFDM_RATE; | |
2155 | sel->rate_idx = i; | |
b481de9c ZY |
2156 | } |
2157 | ||
4b7679a5 JB |
2158 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2159 | gfp_t gfp) | |
b481de9c | 2160 | { |
e227ceac | 2161 | struct iwl_lq_sta *lq_sta; |
bf403db8 | 2162 | struct iwl_priv *priv; |
b481de9c ZY |
2163 | int i, j; |
2164 | ||
bf403db8 | 2165 | priv = (struct iwl_priv *)priv_rate; |
b481de9c ZY |
2166 | IWL_DEBUG_RATE("create station rate scale window\n"); |
2167 | ||
e227ceac | 2168 | lq_sta = kzalloc(sizeof(struct iwl_lq_sta), gfp); |
b481de9c | 2169 | |
c33104f0 | 2170 | if (lq_sta == NULL) |
b481de9c | 2171 | return NULL; |
c33104f0 | 2172 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2173 | |
63fddb9f | 2174 | |
b481de9c ZY |
2175 | for (j = 0; j < LQ_SIZE; j++) |
2176 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2177 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2178 | |
c33104f0 | 2179 | return lq_sta; |
b481de9c ZY |
2180 | } |
2181 | ||
4b7679a5 JB |
2182 | static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, |
2183 | struct ieee80211_sta *sta, void *priv_sta) | |
b481de9c ZY |
2184 | { |
2185 | int i, j; | |
4b7679a5 JB |
2186 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2187 | struct ieee80211_conf *conf = &priv->hw->conf; | |
e227ceac | 2188 | struct iwl_lq_sta *lq_sta = priv_sta; |
b481de9c | 2189 | |
c33104f0 | 2190 | lq_sta->flush_timer = 0; |
4b7679a5 | 2191 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2192 | for (j = 0; j < LQ_SIZE; j++) |
2193 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2194 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2195 | |
3110bef7 | 2196 | IWL_DEBUG_RATE("LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2197 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2198 | * the lowest or the highest rate.. Could consider using RSSI from | |
2199 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2200 | * after assoc.. */ | |
2201 | ||
c33104f0 | 2202 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2203 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
4b7679a5 | 2204 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 | 2205 | |
b481de9c | 2206 | /* for IBSS the call are from tasklet */ |
e174961c | 2207 | IWL_DEBUG_RATE("LQ: ADD station %pM\n", sta->addr); |
b481de9c ZY |
2208 | |
2209 | if (sta_id == IWL_INVALID_STATION) { | |
e174961c | 2210 | IWL_DEBUG_RATE("LQ: ADD station %pM\n", sta->addr); |
4b7679a5 | 2211 | sta_id = iwl_add_station_flags(priv, sta->addr, |
67d62035 | 2212 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2213 | } |
2214 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2215 | lq_sta->lq.sta_id = sta_id; |
2216 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2217 | } |
2218 | /* FIXME: this is w/a remove it later */ | |
2219 | priv->assoc_station_added = 1; | |
2220 | } | |
2221 | ||
77626355 | 2222 | /* Find highest tx rate supported by hardware and destination station */ |
ae17e986 | 2223 | lq_sta->last_txrate_idx = 3; |
8318d78a | 2224 | for (i = 0; i < sband->n_bitrates; i++) |
4b7679a5 | 2225 | if (sta->supp_rates[sband->band] & BIT(i)) |
ae17e986 | 2226 | lq_sta->last_txrate_idx = i; |
8318d78a | 2227 | |
05ecc2c1 | 2228 | /* For MODE_IEEE80211A, skip over cck rates in global rate table */ |
4b7679a5 | 2229 | if (sband->band == IEEE80211_BAND_5GHZ) |
b7e35008 | 2230 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; |
b481de9c | 2231 | |
c33104f0 | 2232 | lq_sta->is_dup = 0; |
c33104f0 | 2233 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2234 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2235 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2236 | lq_sta->band = priv->band; |
77626355 BC |
2237 | /* |
2238 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2239 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2240 | */ | |
263b5f5a RR |
2241 | lq_sta->active_siso_rate = conf->ht_conf.supp_mcs_set[0] << 1; |
2242 | lq_sta->active_siso_rate |= conf->ht_conf.supp_mcs_set[0] & 0x1; | |
c33104f0 | 2243 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2244 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2245 | |
77626355 | 2246 | /* Same here */ |
263b5f5a RR |
2247 | lq_sta->active_mimo2_rate = conf->ht_conf.supp_mcs_set[1] << 1; |
2248 | lq_sta->active_mimo2_rate |= conf->ht_conf.supp_mcs_set[1] & 0x1; | |
fde0db31 GC |
2249 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2250 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2251 | ||
263b5f5a RR |
2252 | lq_sta->active_mimo3_rate = conf->ht_conf.supp_mcs_set[2] << 1; |
2253 | lq_sta->active_mimo3_rate |= conf->ht_conf.supp_mcs_set[2] & 0x1; | |
fde0db31 GC |
2254 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2255 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2256 | ||
07bc28ed | 2257 | IWL_DEBUG_RATE("SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2258 | lq_sta->active_siso_rate, |
fde0db31 GC |
2259 | lq_sta->active_mimo2_rate, |
2260 | lq_sta->active_mimo3_rate); | |
2261 | ||
07bc28ed GC |
2262 | /* These values will be overriden later */ |
2263 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; | |
2264 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2265 | ||
0c11b4de RR |
2266 | /* as default allow aggregation for all tids */ |
2267 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2268 | lq_sta->drv = priv; |
b481de9c | 2269 | |
4b7679a5 | 2270 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2271 | } |
2272 | ||
fde0db31 | 2273 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 2274 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2275 | { |
e227ceac | 2276 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2277 | int index = 0; |
b481de9c | 2278 | int rate_idx; |
1b696de2 | 2279 | int repeat_rate = 0; |
aade00ce | 2280 | u8 ant_toggle_cnt = 0; |
b481de9c | 2281 | u8 use_ht_possible = 1; |
aade00ce | 2282 | u8 valid_tx_ant = 0; |
07bc28ed | 2283 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2284 | |
77626355 | 2285 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2286 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2287 | |
39e88504 | 2288 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2289 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2290 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2291 | &tbl_type, &rate_idx); |
2292 | ||
77626355 | 2293 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2294 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2295 | ant_toggle_cnt = 1; |
1b696de2 | 2296 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2297 | } else { |
1b696de2 | 2298 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2299 | } |
b481de9c ZY |
2300 | |
2301 | lq_cmd->general_params.mimo_delimiter = | |
2302 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2303 | |
2304 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2305 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2306 | |
07bc28ed GC |
2307 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2308 | lq_cmd->general_params.single_stream_ant_msk = | |
2309 | tbl_type.ant_type; | |
2310 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2311 | lq_cmd->general_params.dual_stream_ant_msk = | |
2312 | tbl_type.ant_type; | |
2313 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2314 | |
2315 | index++; | |
1b696de2 | 2316 | repeat_rate--; |
b481de9c | 2317 | |
aade00ce GC |
2318 | if (priv) |
2319 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2320 | ||
77626355 | 2321 | /* Fill rest of rate table */ |
b481de9c | 2322 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2323 | /* Repeat initial/next rate. |
2324 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2325 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2326 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2327 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2328 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2329 | ant_toggle_cnt++; | |
2330 | else if (priv && | |
2331 | rs_toggle_antenna(valid_tx_ant, | |
2332 | &new_rate, &tbl_type)) | |
2333 | ant_toggle_cnt = 1; | |
2334 | } | |
98d7e09a | 2335 | |
77626355 | 2336 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2337 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2338 | |
2339 | /* Fill next table entry */ | |
b481de9c | 2340 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2341 | cpu_to_le32(new_rate); |
1b696de2 | 2342 | repeat_rate--; |
b481de9c ZY |
2343 | index++; |
2344 | } | |
2345 | ||
39e88504 | 2346 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2347 | &rate_idx); |
2348 | ||
77626355 BC |
2349 | /* Indicate to uCode which entries might be MIMO. |
2350 | * If initial rate was MIMO, this will finally end up | |
2351 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2352 | if (is_mimo(tbl_type.lq_type)) |
2353 | lq_cmd->general_params.mimo_delimiter = index; | |
2354 | ||
77626355 | 2355 | /* Get next rate */ |
39e88504 GC |
2356 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2357 | use_ht_possible); | |
b481de9c | 2358 | |
77626355 | 2359 | /* How many times should we repeat the next rate? */ |
b481de9c | 2360 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2361 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2362 | ant_toggle_cnt++; | |
2363 | else if (priv && | |
2364 | rs_toggle_antenna(valid_tx_ant, | |
2365 | &new_rate, &tbl_type)) | |
2366 | ant_toggle_cnt = 1; | |
2367 | ||
1b696de2 | 2368 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2369 | } else { |
1b696de2 | 2370 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2371 | } |
b481de9c | 2372 | |
77626355 BC |
2373 | /* Don't allow HT rates after next pass. |
2374 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2375 | use_ht_possible = 0; |
2376 | ||
77626355 | 2377 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2378 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2379 | |
2380 | /* Fill next table entry */ | |
39e88504 | 2381 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2382 | |
2383 | index++; | |
1b696de2 | 2384 | repeat_rate--; |
b481de9c ZY |
2385 | } |
2386 | ||
5e1dd8dc | 2387 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2388 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2389 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2390 | } |
2391 | ||
4b7679a5 | 2392 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2393 | { |
4b7679a5 | 2394 | return hw->priv; |
b481de9c ZY |
2395 | } |
2396 | /* rate scale requires free function to be implemented */ | |
2397 | static void rs_free(void *priv_rate) | |
2398 | { | |
2399 | return; | |
2400 | } | |
2401 | ||
2402 | static void rs_clear(void *priv_rate) | |
2403 | { | |
e170402e | 2404 | #ifdef CONFIG_IWLWIFI_DEBUG |
c79dd5b5 | 2405 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
b481de9c ZY |
2406 | |
2407 | IWL_DEBUG_RATE("enter\n"); | |
2408 | ||
36e1f16e | 2409 | /* TODO - add rate scale state reset */ |
b481de9c ZY |
2410 | |
2411 | IWL_DEBUG_RATE("leave\n"); | |
e170402e | 2412 | #endif /* CONFIG_IWLWIFI_DEBUG */ |
b481de9c ZY |
2413 | } |
2414 | ||
4b7679a5 JB |
2415 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2416 | void *priv_sta) | |
b481de9c | 2417 | { |
e227ceac | 2418 | struct iwl_lq_sta *lq_sta = priv_sta; |
45527c2c | 2419 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c ZY |
2420 | |
2421 | IWL_DEBUG_RATE("enter\n"); | |
c33104f0 | 2422 | kfree(lq_sta); |
b481de9c ZY |
2423 | IWL_DEBUG_RATE("leave\n"); |
2424 | } | |
2425 | ||
2426 | ||
93dc646a | 2427 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2428 | static int open_file_generic(struct inode *inode, struct file *file) |
2429 | { | |
2430 | file->private_data = inode->i_private; | |
2431 | return 0; | |
2432 | } | |
e227ceac TW |
2433 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2434 | u32 *rate_n_flags, int index) | |
98d7e09a | 2435 | { |
bf403db8 EK |
2436 | struct iwl_priv *priv; |
2437 | ||
2438 | priv = lq_sta->drv; | |
39e88504 GC |
2439 | if (lq_sta->dbg_fixed_rate) { |
2440 | if (index < 12) { | |
2441 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2442 | } else { | |
2443 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2444 | *rate_n_flags = 0x800D; | |
2445 | else | |
2446 | *rate_n_flags = 0x820A; | |
2447 | } | |
98d7e09a | 2448 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2449 | } else { |
2450 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2451 | } |
98d7e09a | 2452 | } |
5ae212c9 | 2453 | |
98d7e09a ZY |
2454 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2455 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2456 | { | |
e227ceac | 2457 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2458 | struct iwl_priv *priv; |
98d7e09a ZY |
2459 | char buf[64]; |
2460 | int buf_size; | |
2461 | u32 parsed_rate; | |
2462 | ||
bf403db8 | 2463 | priv = lq_sta->drv; |
98d7e09a ZY |
2464 | memset(buf, 0, sizeof(buf)); |
2465 | buf_size = min(count, sizeof(buf) - 1); | |
2466 | if (copy_from_user(buf, user_buf, buf_size)) | |
2467 | return -EFAULT; | |
2468 | ||
2469 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2470 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2471 | else |
39e88504 | 2472 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2473 | |
39e88504 GC |
2474 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2475 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2476 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2477 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2478 | |
2479 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2480 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2481 | |
39e88504 | 2482 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2483 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2484 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2485 | } |
2486 | ||
2487 | return count; | |
2488 | } | |
0209dc11 | 2489 | |
5ae212c9 ZY |
2490 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2491 | char __user *user_buf, size_t count, loff_t *ppos) | |
2492 | { | |
2493 | char buff[1024]; | |
2494 | int desc = 0; | |
2495 | int i = 0; | |
2496 | ||
e227ceac | 2497 | struct iwl_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2498 | |
c33104f0 | 2499 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2500 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2501 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2502 | lq_sta->active_legacy_rate); |
98d7e09a | 2503 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2504 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2505 | desc += sprintf(buff+desc, "general:" |
2506 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2507 | lq_sta->lq.general_params.flags, |
2508 | lq_sta->lq.general_params.mimo_delimiter, | |
2509 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2510 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2511 | |
2512 | desc += sprintf(buff+desc, "agg:" | |
2513 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2514 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2515 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2516 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2517 | |
2518 | desc += sprintf(buff+desc, | |
2519 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2520 | lq_sta->lq.general_params.start_rate_index[0], |
2521 | lq_sta->lq.general_params.start_rate_index[1], | |
2522 | lq_sta->lq.general_params.start_rate_index[2], | |
2523 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2524 | |
2525 | ||
2526 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2527 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2528 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2529 | |
2530 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2531 | } | |
2532 | ||
2533 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2534 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2535 | .read = rs_sta_dbgfs_scale_table_read, |
2536 | .open = open_file_generic, | |
2537 | }; | |
0209dc11 ZY |
2538 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2539 | char __user *user_buf, size_t count, loff_t *ppos) | |
2540 | { | |
2541 | char buff[1024]; | |
2542 | int desc = 0; | |
2543 | int i, j; | |
2544 | ||
e227ceac | 2545 | struct iwl_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2546 | for (i = 0; i < LQ_SIZE; i++) { |
2547 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2548 | "rate=0x%X\n", | |
c33104f0 TW |
2549 | lq_sta->active_tbl == i?"*":"x", |
2550 | lq_sta->lq_info[i].lq_type, | |
2551 | lq_sta->lq_info[i].is_SGI, | |
2552 | lq_sta->lq_info[i].is_fat, | |
2553 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2554 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2555 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2556 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2557 | "counter=%d success=%d %%=%d\n", |
2558 | lq_sta->lq_info[i].win[j].counter, | |
2559 | lq_sta->lq_info[i].win[j].success_counter, | |
2560 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2561 | } |
2562 | } | |
2563 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2564 | } | |
2565 | ||
2566 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2567 | .read = rs_sta_dbgfs_stats_table_read, | |
2568 | .open = open_file_generic, | |
2569 | }; | |
5ae212c9 | 2570 | |
93dc646a ZY |
2571 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2572 | struct dentry *dir) | |
2573 | { | |
e227ceac | 2574 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2575 | lq_sta->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 2576 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2577 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2578 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2579 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2580 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2581 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2582 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2583 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2584 | |
93dc646a ZY |
2585 | } |
2586 | ||
2587 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2588 | { | |
e227ceac | 2589 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2590 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2591 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2592 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2593 | } |
2594 | #endif | |
2595 | ||
b481de9c ZY |
2596 | static struct rate_control_ops rs_ops = { |
2597 | .module = NULL, | |
2598 | .name = RS_NAME, | |
2599 | .tx_status = rs_tx_status, | |
2600 | .get_rate = rs_get_rate, | |
2601 | .rate_init = rs_rate_init, | |
2602 | .clear = rs_clear, | |
2603 | .alloc = rs_alloc, | |
2604 | .free = rs_free, | |
2605 | .alloc_sta = rs_alloc_sta, | |
2606 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2607 | #ifdef CONFIG_MAC80211_DEBUGFS |
2608 | .add_sta_debugfs = rs_add_debugfs, | |
2609 | .remove_sta_debugfs = rs_remove_debugfs, | |
2610 | #endif | |
b481de9c ZY |
2611 | }; |
2612 | ||
e227ceac | 2613 | int iwlagn_rate_control_register(void) |
b481de9c | 2614 | { |
897e1cf2 | 2615 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2616 | } |
2617 | ||
e227ceac | 2618 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
2619 | { |
2620 | ieee80211_rate_control_unregister(&rs_ops); | |
2621 | } | |
2622 |