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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 | { |
0c11b4de RR |
360 | DECLARE_MAC_BUF(mac); |
361 | ||
ff550cb4 | 362 | if (rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { |
0c11b4de | 363 | IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n", |
4b7679a5 JB |
364 | print_mac(mac, sta->addr), tid); |
365 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); | |
0c11b4de RR |
366 | } |
367 | } | |
368 | ||
c79dd5b5 | 369 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 370 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 371 | struct ieee80211_sta *sta) |
0c11b4de RR |
372 | { |
373 | if ((tid < TID_MAX_LOAD_COUNT)) | |
374 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
375 | else if (tid == IWL_AGG_ALL_TID) | |
376 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
377 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
378 | } | |
379 | ||
39e88504 | 380 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 381 | { |
3ac7f146 TW |
382 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
383 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
384 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
385 | } |
386 | ||
77626355 BC |
387 | /** |
388 | * rs_collect_tx_data - Update the success/failure sliding window | |
389 | * | |
390 | * We keep a sliding window of the last 62 packets transmitted | |
391 | * at this rate. window->data contains the bitmask of successful | |
392 | * packets. | |
393 | */ | |
e227ceac | 394 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
99556438 RR |
395 | int scale_index, s32 tpt, int retries, |
396 | int successes) | |
b481de9c | 397 | { |
e227ceac | 398 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 399 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
400 | s32 fail_count; |
401 | ||
dc2453ae TW |
402 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
403 | return -EINVAL; | |
b481de9c | 404 | |
77626355 | 405 | /* Select data for current tx bit rate */ |
b481de9c ZY |
406 | window = &(windows[scale_index]); |
407 | ||
77626355 BC |
408 | /* |
409 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
410 | * history window; anything older isn't really relevant any more. | |
411 | * If we have filled up the sliding window, drop the oldest attempt; | |
412 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
413 | * subtract "1" from the success counter (this is the main reason | |
414 | * we keep these bitmaps!). | |
415 | */ | |
99556438 | 416 | while (retries > 0) { |
39e88504 GC |
417 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
418 | ||
419 | /* remove earliest */ | |
420 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
421 | ||
99556438 RR |
422 | if (window->data & mask) { |
423 | window->data &= ~mask; | |
39e88504 | 424 | window->success_counter--; |
99556438 | 425 | } |
b481de9c | 426 | } |
b481de9c | 427 | |
99556438 RR |
428 | /* Increment frames-attempted counter */ |
429 | window->counter++; | |
430 | ||
431 | /* Shift bitmap by one frame (throw away oldest history), | |
432 | * OR in "1", and increment "success" if this | |
433 | * frame was successful. */ | |
90d7795e | 434 | window->data <<= 1; |
99556438 | 435 | if (successes > 0) { |
39e88504 | 436 | window->success_counter++; |
99556438 RR |
437 | window->data |= 0x1; |
438 | successes--; | |
439 | } | |
77626355 | 440 | |
99556438 | 441 | retries--; |
b481de9c ZY |
442 | } |
443 | ||
77626355 | 444 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
445 | if (window->counter > 0) |
446 | window->success_ratio = 128 * (100 * window->success_counter) | |
447 | / window->counter; | |
448 | else | |
449 | window->success_ratio = IWL_INVALID_VALUE; | |
450 | ||
451 | fail_count = window->counter - window->success_counter; | |
452 | ||
77626355 | 453 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
454 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
455 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
456 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
457 | else | |
458 | window->average_tpt = IWL_INVALID_VALUE; | |
459 | ||
77626355 | 460 | /* Tag this window as having been updated */ |
b481de9c ZY |
461 | window->stamp = jiffies; |
462 | ||
dc2453ae | 463 | return 0; |
b481de9c ZY |
464 | } |
465 | ||
77626355 BC |
466 | /* |
467 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
468 | */ | |
39e88504 | 469 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
e227ceac | 470 | static u32 rate_n_flags_from_tbl(struct iwl_scale_tbl_info *tbl, |
39e88504 | 471 | int index, u8 use_green) |
b481de9c | 472 | { |
39e88504 GC |
473 | u32 rate_n_flags = 0; |
474 | ||
b481de9c | 475 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 476 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 477 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 478 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 479 | |
fde0db31 GC |
480 | } else if (is_Ht(tbl->lq_type)) { |
481 | if (index > IWL_LAST_OFDM_RATE) { | |
482 | IWL_ERROR("invalid HT rate index %d\n", index); | |
b481de9c | 483 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 484 | } |
39e88504 | 485 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
486 | |
487 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 488 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 489 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 490 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 491 | else |
1826dcc0 | 492 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 493 | } else { |
fde0db31 | 494 | IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
495 | } |
496 | ||
39e88504 | 497 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 498 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 499 | |
39e88504 GC |
500 | if (is_Ht(tbl->lq_type)) { |
501 | if (tbl->is_fat) { | |
502 | if (tbl->is_dup) | |
503 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
504 | else | |
505 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
506 | } | |
507 | if (tbl->is_SGI) | |
508 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
509 | ||
510 | if (use_green) { | |
511 | rate_n_flags |= RATE_MCS_GF_MSK; | |
512 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
513 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
514 | IWL_ERROR("GF was set with SGI:SISO\n"); | |
515 | } | |
516 | } | |
b481de9c | 517 | } |
39e88504 | 518 | return rate_n_flags; |
b481de9c ZY |
519 | } |
520 | ||
77626355 BC |
521 | /* |
522 | * Interpret uCode API's rate_n_flags format, | |
523 | * fill "search" or "active" tx mode table. | |
524 | */ | |
39e88504 | 525 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 526 | enum ieee80211_band band, |
e227ceac | 527 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
528 | int *rate_idx) |
529 | { | |
39e88504 GC |
530 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
531 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
532 | u8 mcs; | |
b481de9c | 533 | |
e7d326ac | 534 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 535 | |
fde0db31 | 536 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 537 | *rate_idx = -1; |
dc2453ae | 538 | return -EINVAL; |
b481de9c | 539 | } |
77626355 | 540 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
541 | tbl->is_fat = 0; |
542 | tbl->is_dup = 0; | |
fde0db31 GC |
543 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
544 | tbl->lq_type = LQ_NONE; | |
b481de9c | 545 | |
77626355 | 546 | /* legacy rate format */ |
39e88504 | 547 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 548 | if (num_of_ant == 1) { |
8318d78a | 549 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
550 | tbl->lq_type = LQ_A; |
551 | else | |
552 | tbl->lq_type = LQ_G; | |
b481de9c | 553 | } |
fde0db31 | 554 | /* HT rate format */ |
b481de9c | 555 | } else { |
39e88504 | 556 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
557 | tbl->is_SGI = 1; |
558 | ||
39e88504 GC |
559 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
560 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
561 | tbl->is_fat = 1; |
562 | ||
39e88504 | 563 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 564 | tbl->is_dup = 1; |
fde0db31 | 565 | |
39e88504 | 566 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 567 | |
39e88504 GC |
568 | /* SISO */ |
569 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
570 | if (num_of_ant == 1) |
571 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
572 | /* MIMO2 */ | |
39e88504 | 573 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
574 | if (num_of_ant == 2) |
575 | tbl->lq_type = LQ_MIMO2; | |
576 | /* MIMO3 */ | |
577 | } else { | |
578 | if (num_of_ant == 3) | |
579 | tbl->lq_type = LQ_MIMO3; | |
580 | } | |
b481de9c ZY |
581 | } |
582 | return 0; | |
583 | } | |
aade00ce GC |
584 | |
585 | /* switch to another antenna/antennas and return 1 */ | |
586 | /* if no other valid antenna found, return 0 */ | |
587 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 588 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 589 | { |
aade00ce GC |
590 | u8 new_ant_type; |
591 | ||
592 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
593 | return 0; | |
594 | ||
595 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
596 | return 0; | |
597 | ||
598 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
599 | ||
600 | while ((new_ant_type != tbl->ant_type) && | |
601 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
602 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
603 | ||
604 | if (new_ant_type == tbl->ant_type) | |
605 | return 0; | |
606 | ||
607 | tbl->ant_type = new_ant_type; | |
608 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
609 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
610 | return 1; | |
b481de9c ZY |
611 | } |
612 | ||
39e88504 | 613 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 614 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
615 | #if 0 |
616 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 617 | { |
3ac7f146 | 618 | return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
270243a5 | 619 | priv->current_ht_config.is_green_field && |
3ac7f146 | 620 | !priv->current_ht_config.non_GF_STA_present; |
f935a6da | 621 | } |
4f85f5b3 | 622 | #endif |
f935a6da GC |
623 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
624 | { | |
dc2453ae | 625 | return 0; |
b481de9c ZY |
626 | } |
627 | ||
628 | /** | |
629 | * rs_get_supported_rates - get the available rates | |
630 | * | |
631 | * if management frame or broadcast frame only return | |
632 | * basic available rates. | |
633 | * | |
634 | */ | |
e227ceac TW |
635 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
636 | struct ieee80211_hdr *hdr, | |
637 | enum iwl_table_type rate_type) | |
b481de9c | 638 | { |
eecd6e57 GC |
639 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
640 | lq_sta->active_rate_basic) | |
641 | return lq_sta->active_rate_basic; | |
642 | ||
643 | if (is_legacy(rate_type)) { | |
644 | return lq_sta->active_legacy_rate; | |
645 | } else { | |
b481de9c | 646 | if (is_siso(rate_type)) |
eecd6e57 | 647 | return lq_sta->active_siso_rate; |
fde0db31 | 648 | else if (is_mimo2(rate_type)) |
eecd6e57 | 649 | return lq_sta->active_mimo2_rate; |
b481de9c | 650 | else |
eecd6e57 | 651 | return lq_sta->active_mimo3_rate; |
c33104f0 | 652 | } |
b481de9c ZY |
653 | } |
654 | ||
bf403db8 EK |
655 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
656 | int rate_type) | |
b481de9c ZY |
657 | { |
658 | u8 high = IWL_RATE_INVALID; | |
659 | u8 low = IWL_RATE_INVALID; | |
660 | ||
01ebd063 | 661 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
662 | * the rate table */ |
663 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
664 | int i; | |
665 | u32 mask; | |
666 | ||
667 | /* Find the previous rate that is in the rate mask */ | |
668 | i = index - 1; | |
669 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
670 | if (rate_mask & mask) { | |
671 | low = i; | |
672 | break; | |
673 | } | |
674 | } | |
675 | ||
676 | /* Find the next rate that is in the rate mask */ | |
677 | i = index + 1; | |
678 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
679 | if (rate_mask & mask) { | |
680 | high = i; | |
681 | break; | |
682 | } | |
683 | } | |
684 | ||
685 | return (high << 8) | low; | |
686 | } | |
687 | ||
688 | low = index; | |
689 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 690 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
691 | if (low == IWL_RATE_INVALID) |
692 | break; | |
693 | if (rate_mask & (1 << low)) | |
694 | break; | |
695 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
696 | } | |
697 | ||
698 | high = index; | |
699 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 700 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
701 | if (high == IWL_RATE_INVALID) |
702 | break; | |
703 | if (rate_mask & (1 << high)) | |
704 | break; | |
705 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
706 | } | |
707 | ||
708 | return (high << 8) | low; | |
709 | } | |
710 | ||
e227ceac TW |
711 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
712 | struct iwl_scale_tbl_info *tbl, | |
713 | u8 scale_index, u8 ht_possible) | |
b481de9c | 714 | { |
b481de9c ZY |
715 | s32 low; |
716 | u16 rate_mask; | |
717 | u16 high_low; | |
718 | u8 switch_to_legacy = 0; | |
c33104f0 | 719 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
720 | |
721 | /* check if we need to switch from HT to legacy rates. | |
722 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
723 | * are always supported (spec demand) */ | |
724 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
725 | switch_to_legacy = 1; | |
726 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 727 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
728 | tbl->lq_type = LQ_A; |
729 | else | |
730 | tbl->lq_type = LQ_G; | |
731 | ||
69fdb309 | 732 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 733 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
734 | |
735 | tbl->is_fat = 0; | |
736 | tbl->is_SGI = 0; | |
737 | } | |
738 | ||
eecd6e57 | 739 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 740 | |
77626355 | 741 | /* Mask with station rate restriction */ |
b481de9c | 742 | if (is_legacy(tbl->lq_type)) { |
77626355 | 743 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 744 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 745 | rate_mask = (u16)(rate_mask & |
c33104f0 | 746 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 747 | else |
c33104f0 | 748 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
749 | } |
750 | ||
77626355 | 751 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 752 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
753 | low = scale_index; |
754 | goto out; | |
b481de9c ZY |
755 | } |
756 | ||
bf403db8 EK |
757 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
758 | tbl->lq_type); | |
b481de9c ZY |
759 | low = high_low & 0xff; |
760 | ||
39e88504 GC |
761 | if (low == IWL_RATE_INVALID) |
762 | low = scale_index; | |
763 | ||
764 | out: | |
765 | return rate_n_flags_from_tbl(tbl, low, is_green); | |
b481de9c ZY |
766 | } |
767 | ||
77626355 BC |
768 | /* |
769 | * mac80211 sends us Tx status | |
770 | */ | |
4b7679a5 JB |
771 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
772 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 773 | struct sk_buff *skb) |
b481de9c ZY |
774 | { |
775 | int status; | |
776 | u8 retries; | |
777 | int rs_index, index = 0; | |
e227ceac | 778 | struct iwl_lq_sta *lq_sta; |
66c73db7 | 779 | struct iwl_link_quality_cmd *table; |
b481de9c | 780 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 JB |
781 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
782 | struct ieee80211_hw *hw = priv->hw; | |
e039fa4a | 783 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac TW |
784 | struct iwl_rate_scale_data *window = NULL; |
785 | struct iwl_rate_scale_data *search_win = NULL; | |
39e88504 | 786 | u32 tx_rate; |
e227ceac TW |
787 | struct iwl_scale_tbl_info tbl_type; |
788 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c | 789 | u8 active_index = 0; |
fd7c8a40 | 790 | __le16 fc = hdr->frame_control; |
b481de9c ZY |
791 | s32 tpt = 0; |
792 | ||
58826351 | 793 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
794 | |
795 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
796 | return; | |
797 | ||
99556438 | 798 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
799 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
800 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
801 | return; |
802 | ||
e039fa4a | 803 | retries = info->status.retry_count; |
b481de9c ZY |
804 | |
805 | if (retries > 15) | |
806 | retries = 15; | |
807 | ||
4b7679a5 | 808 | lq_sta = (struct iwl_lq_sta *)priv_sta; |
b481de9c | 809 | |
05c914fe | 810 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 811 | !lq_sta->ibss_sta_added) |
f4d6082d | 812 | goto out; |
b481de9c | 813 | |
c33104f0 TW |
814 | table = &lq_sta->lq; |
815 | active_index = lq_sta->active_tbl; | |
b481de9c | 816 | |
c33104f0 TW |
817 | curr_tbl = &(lq_sta->lq_info[active_index]); |
818 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
e227ceac TW |
819 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
820 | search_win = (struct iwl_rate_scale_data *)&(search_tbl->win[0]); | |
b481de9c | 821 | |
77626355 BC |
822 | /* |
823 | * Ignore this Tx frame response if its initial rate doesn't match | |
824 | * that of latest Link Quality command. There may be stragglers | |
825 | * from a previous Link Quality command, but we're no longer interested | |
826 | * in those; they're either from the "active" mode while we're trying | |
827 | * to check "search" mode, or a prior "search" mode after we've moved | |
828 | * to a new "search" mode (which might become the new "active" mode). | |
829 | */ | |
39e88504 GC |
830 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
831 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
832 | if (priv->band == IEEE80211_BAND_5GHZ) |
833 | rs_index -= IWL_FIRST_OFDM_RATE; | |
834 | ||
e039fa4a | 835 | if ((info->tx_rate_idx < 0) || |
4c424e4c | 836 | (tbl_type.is_SGI ^ |
e039fa4a | 837 | !!(info->flags & IEEE80211_TX_CTL_SHORT_GI)) || |
4c424e4c | 838 | (tbl_type.is_fat ^ |
e039fa4a | 839 | !!(info->flags & IEEE80211_TX_CTL_40_MHZ_WIDTH)) || |
4c424e4c | 840 | (tbl_type.is_dup ^ |
e039fa4a JB |
841 | !!(info->flags & IEEE80211_TX_CTL_DUP_DATA)) || |
842 | (tbl_type.ant_type ^ info->antenna_sel_tx) || | |
39e88504 | 843 | (!!(tx_rate & RATE_MCS_HT_MSK) ^ |
e039fa4a | 844 | !!(info->flags & IEEE80211_TX_CTL_OFDM_HT)) || |
39e88504 | 845 | (!!(tx_rate & RATE_MCS_GF_MSK) ^ |
e039fa4a | 846 | !!(info->flags & IEEE80211_TX_CTL_GREEN_FIELD)) || |
4c424e4c | 847 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e039fa4a | 848 | hw->wiphy->bands[info->band]->bitrates[info->tx_rate_idx].bitrate)) { |
39e88504 | 849 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
f4d6082d | 850 | goto out; |
b481de9c ZY |
851 | } |
852 | ||
77626355 | 853 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 854 | while (retries) { |
77626355 BC |
855 | /* Look up the rate and other info used for each tx attempt. |
856 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
857 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
858 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
859 | &tbl_type, &rs_index); |
860 | ||
77626355 BC |
861 | /* If type matches "search" table, |
862 | * add failure to "search" history */ | |
b481de9c | 863 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 864 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
865 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
866 | if (search_tbl->expected_tpt) | |
867 | tpt = search_tbl->expected_tpt[rs_index]; | |
868 | else | |
869 | tpt = 0; | |
99556438 | 870 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
871 | |
872 | /* Else if type matches "current/active" table, | |
873 | * add failure to "current/active" history */ | |
b481de9c | 874 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 875 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
876 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
877 | if (curr_tbl->expected_tpt) | |
878 | tpt = curr_tbl->expected_tpt[rs_index]; | |
879 | else | |
880 | tpt = 0; | |
99556438 | 881 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 882 | } |
77626355 BC |
883 | |
884 | /* If not searching for a new mode, increment failed counter | |
885 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
886 | if (lq_sta->stay_in_tbl) |
887 | lq_sta->total_failed++; | |
b481de9c ZY |
888 | --retries; |
889 | index++; | |
890 | ||
891 | } | |
892 | ||
77626355 BC |
893 | /* |
894 | * Find (by rate) the history window to update with final Tx attempt; | |
895 | * if Tx was successful first try, use original rate, | |
896 | * else look up the rate that was, finally, successful. | |
897 | */ | |
39e88504 GC |
898 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
899 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 900 | |
77626355 | 901 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 902 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 903 | |
77626355 BC |
904 | /* If type matches "search" table, |
905 | * add final tx status to "search" history */ | |
b481de9c | 906 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 907 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
908 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
909 | if (search_tbl->expected_tpt) | |
910 | tpt = search_tbl->expected_tpt[rs_index]; | |
911 | else | |
912 | tpt = 0; | |
e039fa4a | 913 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 914 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
915 | info->status.ampdu_ack_len, |
916 | info->status.ampdu_ack_map); | |
99556438 RR |
917 | else |
918 | rs_collect_tx_data(search_win, rs_index, tpt, | |
919 | 1, status); | |
77626355 BC |
920 | /* Else if type matches "current/active" table, |
921 | * add final tx status to "current/active" history */ | |
b481de9c | 922 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 923 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
924 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
925 | if (curr_tbl->expected_tpt) | |
926 | tpt = curr_tbl->expected_tpt[rs_index]; | |
927 | else | |
928 | tpt = 0; | |
e039fa4a | 929 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
99556438 | 930 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
931 | info->status.ampdu_ack_len, |
932 | info->status.ampdu_ack_map); | |
99556438 RR |
933 | else |
934 | rs_collect_tx_data(window, rs_index, tpt, | |
935 | 1, status); | |
b481de9c ZY |
936 | } |
937 | ||
77626355 BC |
938 | /* If not searching for new mode, increment success/failed counter |
939 | * ... these help determine when to start searching again */ | |
c33104f0 | 940 | if (lq_sta->stay_in_tbl) { |
e039fa4a JB |
941 | if (info->flags & IEEE80211_TX_CTL_AMPDU) { |
942 | lq_sta->total_success += info->status.ampdu_ack_map; | |
99556438 | 943 | lq_sta->total_failed += |
e039fa4a | 944 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
945 | } else { |
946 | if (status) | |
947 | lq_sta->total_success++; | |
948 | else | |
949 | lq_sta->total_failed++; | |
950 | } | |
b481de9c ZY |
951 | } |
952 | ||
77626355 | 953 | /* See if there's a better rate or modulation mode to try. */ |
4b7679a5 | 954 | rs_rate_scale_perform(priv, hdr, sta, lq_sta); |
f4d6082d | 955 | out: |
b481de9c ZY |
956 | return; |
957 | } | |
958 | ||
77626355 BC |
959 | /* |
960 | * Begin a period of staying with a selected modulation mode. | |
961 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
962 | * Set frame tx success limits according to legacy vs. high-throughput, | |
963 | * and reset overall (spanning all rates) tx success history statistics. | |
964 | * These control how long we stay using same modulation mode before | |
965 | * searching for a new mode. | |
966 | */ | |
bf403db8 | 967 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 968 | struct iwl_lq_sta *lq_sta) |
b481de9c | 969 | { |
eecd6e57 | 970 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 971 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 972 | if (is_legacy) { |
c33104f0 TW |
973 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
974 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
975 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 976 | } else { |
c33104f0 TW |
977 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
978 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
979 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 980 | } |
c33104f0 TW |
981 | lq_sta->table_count = 0; |
982 | lq_sta->total_failed = 0; | |
983 | lq_sta->total_success = 0; | |
b481de9c ZY |
984 | } |
985 | ||
77626355 BC |
986 | /* |
987 | * Find correct throughput table for given mode of modulation | |
988 | */ | |
e227ceac TW |
989 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
990 | struct iwl_scale_tbl_info *tbl) | |
b481de9c ZY |
991 | { |
992 | if (is_legacy(tbl->lq_type)) { | |
993 | if (!is_a_band(tbl->lq_type)) | |
994 | tbl->expected_tpt = expected_tpt_G; | |
995 | else | |
996 | tbl->expected_tpt = expected_tpt_A; | |
997 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 998 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
999 | if (tbl->is_SGI) |
1000 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1001 | else | |
1002 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1003 | else if (tbl->is_SGI) | |
1004 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1005 | else | |
1006 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1007 | ||
fde0db31 | 1008 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1009 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1010 | if (tbl->is_SGI) |
1011 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1012 | else | |
1013 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1014 | else if (tbl->is_SGI) | |
1015 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1016 | else | |
1017 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1018 | } else | |
1019 | tbl->expected_tpt = expected_tpt_G; | |
1020 | } | |
1021 | ||
77626355 BC |
1022 | /* |
1023 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1024 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1025 | * above the current measured throughput of "active" mode, to give new mode | |
1026 | * a fair chance to prove itself without too many challenges. | |
1027 | * | |
1028 | * This gets called when transitioning to more aggressive modulation | |
1029 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1030 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1031 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1032 | * bit rate will typically need to increase, but not if performance was bad. | |
1033 | */ | |
c79dd5b5 | 1034 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1035 | struct iwl_lq_sta *lq_sta, |
1036 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1037 | u16 rate_mask, s8 index) |
b481de9c | 1038 | { |
77626355 | 1039 | /* "active" values */ |
e227ceac | 1040 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1041 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1042 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1043 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1044 | |
1045 | /* expected "search" throughput */ | |
1046 | s32 *tpt_tbl = tbl->expected_tpt; | |
1047 | ||
1048 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1049 | u16 high_low; |
f935a6da | 1050 | s8 rate = index; |
b481de9c ZY |
1051 | |
1052 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1053 | ||
1054 | for (; ;) { | |
bf403db8 EK |
1055 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1056 | tbl->lq_type); | |
b481de9c ZY |
1057 | |
1058 | low = high_low & 0xff; | |
1059 | high = (high_low >> 8) & 0xff; | |
1060 | ||
77626355 BC |
1061 | /* |
1062 | * Lower the "search" bit rate, to give new "search" mode | |
1063 | * approximately the same throughput as "active" if: | |
1064 | * | |
1065 | * 1) "Active" mode has been working modestly well (but not | |
1066 | * great), and expected "search" throughput (under perfect | |
1067 | * conditions) at candidate rate is above the actual | |
1068 | * measured "active" throughput (but less than expected | |
1069 | * "active" throughput under perfect conditions). | |
1070 | * OR | |
1071 | * 2) "Active" mode has been working perfectly or very well | |
1072 | * and expected "search" throughput (under perfect | |
1073 | * conditions) at candidate rate is above expected | |
1074 | * "active" throughput (under perfect conditions). | |
1075 | */ | |
c33104f0 | 1076 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1077 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1078 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1079 | (tpt_tbl[rate] <= active_tpt))) || | |
1080 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1081 | (tpt_tbl[rate] > active_tpt))) { | |
1082 | ||
77626355 BC |
1083 | /* (2nd or later pass) |
1084 | * If we've already tried to raise the rate, and are | |
1085 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1086 | if (start_hi != IWL_RATE_INVALID) { |
1087 | new_rate = start_hi; | |
1088 | break; | |
1089 | } | |
77626355 | 1090 | |
b481de9c | 1091 | new_rate = rate; |
77626355 BC |
1092 | |
1093 | /* Loop again with lower rate */ | |
b481de9c ZY |
1094 | if (low != IWL_RATE_INVALID) |
1095 | rate = low; | |
77626355 BC |
1096 | |
1097 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1098 | else |
1099 | break; | |
77626355 BC |
1100 | |
1101 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1102 | } else { |
77626355 BC |
1103 | /* (2nd or later pass) |
1104 | * If we've already tried to lower the rate, and are | |
1105 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1106 | if (new_rate != IWL_RATE_INVALID) |
1107 | break; | |
77626355 BC |
1108 | |
1109 | /* Loop again with higher rate */ | |
b481de9c ZY |
1110 | else if (high != IWL_RATE_INVALID) { |
1111 | start_hi = high; | |
1112 | rate = high; | |
77626355 BC |
1113 | |
1114 | /* Higher rate not available, use the original */ | |
b481de9c | 1115 | } else { |
90d7795e | 1116 | new_rate = rate; |
b481de9c ZY |
1117 | break; |
1118 | } | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | return new_rate; | |
1123 | } | |
b481de9c | 1124 | |
77626355 BC |
1125 | /* |
1126 | * Set up search table for MIMO | |
1127 | */ | |
fde0db31 | 1128 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1129 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1130 | struct ieee80211_conf *conf, |
4b7679a5 | 1131 | struct ieee80211_sta *sta, |
e227ceac | 1132 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1133 | { |
b481de9c ZY |
1134 | u16 rate_mask; |
1135 | s32 rate; | |
c33104f0 | 1136 | s8 is_green = lq_sta->is_green; |
b481de9c | 1137 | |
270243a5 | 1138 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
4b7679a5 | 1139 | !sta->ht_info.ht_supported) |
b481de9c ZY |
1140 | return -1; |
1141 | ||
4b7679a5 | 1142 | if (((sta->ht_info.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1143 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1144 | return -1; |
1145 | ||
77626355 | 1146 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1147 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1148 | return -1; |
1149 | ||
eecd6e57 | 1150 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1151 | |
1152 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1153 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1154 | tbl->action = 0; |
39e88504 GC |
1155 | rate_mask = lq_sta->active_mimo2_rate; |
1156 | ||
270243a5 | 1157 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1158 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1159 | tbl->is_fat = 1; |
1160 | else | |
1161 | tbl->is_fat = 0; | |
1162 | ||
39e88504 | 1163 | /* FIXME: - don't toggle SGI here |
b481de9c | 1164 | if (tbl->is_fat) { |
270243a5 | 1165 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1166 | tbl->is_SGI = 1; |
1167 | else | |
1168 | tbl->is_SGI = 0; | |
270243a5 | 1169 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1170 | tbl->is_SGI = 1; |
1171 | else | |
1172 | tbl->is_SGI = 0; | |
39e88504 | 1173 | */ |
b481de9c | 1174 | |
eecd6e57 | 1175 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1176 | |
f935a6da | 1177 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1178 | |
eecd6e57 | 1179 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1180 | |
1181 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1182 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1183 | rate, rate_mask); |
b481de9c | 1184 | return -1; |
39e88504 GC |
1185 | } |
1186 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); | |
b481de9c | 1187 | |
eecd6e57 | 1188 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1189 | tbl->current_rate, is_green); |
dc2453ae | 1190 | return 0; |
fde0db31 | 1191 | } |
b481de9c | 1192 | |
77626355 BC |
1193 | /* |
1194 | * Set up search table for SISO | |
1195 | */ | |
c79dd5b5 | 1196 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1197 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1198 | struct ieee80211_conf *conf, |
4b7679a5 | 1199 | struct ieee80211_sta *sta, |
e227ceac | 1200 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1201 | { |
b481de9c | 1202 | u16 rate_mask; |
c33104f0 | 1203 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1204 | s32 rate; |
1205 | ||
270243a5 | 1206 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
4b7679a5 | 1207 | !sta->ht_info.ht_supported) |
b481de9c ZY |
1208 | return -1; |
1209 | ||
eecd6e57 | 1210 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1211 | |
c33104f0 | 1212 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1213 | tbl->lq_type = LQ_SISO; |
1214 | tbl->action = 0; | |
39e88504 | 1215 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1216 | |
270243a5 RR |
1217 | if (priv->current_ht_config.supported_chan_width |
1218 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1219 | tbl->is_fat = 1; |
1220 | else | |
1221 | tbl->is_fat = 0; | |
1222 | ||
39e88504 | 1223 | /* FIXME: - don't toggle SGI here |
b481de9c | 1224 | if (tbl->is_fat) { |
270243a5 | 1225 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1226 | tbl->is_SGI = 1; |
1227 | else | |
1228 | tbl->is_SGI = 0; | |
270243a5 | 1229 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1230 | tbl->is_SGI = 1; |
1231 | else | |
1232 | tbl->is_SGI = 0; | |
39e88504 | 1233 | */ |
b481de9c ZY |
1234 | |
1235 | if (is_green) | |
39e88504 | 1236 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1237 | |
eecd6e57 | 1238 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1239 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1240 | |
eecd6e57 | 1241 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1242 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1243 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1244 | rate, rate_mask); |
1245 | return -1; | |
1246 | } | |
39e88504 | 1247 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); |
eecd6e57 | 1248 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1249 | tbl->current_rate, is_green); |
403ab56b | 1250 | return 0; |
b481de9c ZY |
1251 | } |
1252 | ||
77626355 BC |
1253 | /* |
1254 | * Try to switch to new modulation mode from legacy | |
1255 | */ | |
c79dd5b5 | 1256 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1257 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1258 | struct ieee80211_conf *conf, |
4b7679a5 | 1259 | struct ieee80211_sta *sta, |
b481de9c ZY |
1260 | int index) |
1261 | { | |
e227ceac TW |
1262 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1263 | struct iwl_scale_tbl_info *search_tbl = | |
1264 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1265 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1266 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1267 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1268 | u8 start_action = tbl->action; |
fde0db31 | 1269 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1270 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1271 | int ret = 0; |
b481de9c ZY |
1272 | |
1273 | for (; ;) { | |
1274 | switch (tbl->action) { | |
3110bef7 GC |
1275 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1276 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
f935a6da | 1277 | IWL_DEBUG_RATE("LQ: Legacy toggle Antenna\n"); |
b481de9c | 1278 | |
c33104f0 | 1279 | lq_sta->action_counter++; |
77626355 | 1280 | |
3110bef7 GC |
1281 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1282 | tx_chains_num <= 1) || | |
1283 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1284 | tx_chains_num <= 2)) | |
1285 | break; | |
1286 | ||
77626355 | 1287 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1288 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1289 | break; | |
77626355 | 1290 | |
77626355 | 1291 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1292 | memcpy(search_tbl, tbl, sz); |
1293 | ||
aade00ce GC |
1294 | if (rs_toggle_antenna(valid_tx_ant, |
1295 | &search_tbl->current_rate, search_tbl)) { | |
3110bef7 | 1296 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1297 | goto out; |
1298 | } | |
a5e8b505 | 1299 | break; |
b481de9c | 1300 | case IWL_LEGACY_SWITCH_SISO: |
eecd6e57 | 1301 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1302 | |
1303 | /* Set up search table to try SISO */ | |
b481de9c | 1304 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1305 | search_tbl->is_SGI = 0; |
c33104f0 | 1306 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1307 | search_tbl, index); |
dc2453ae | 1308 | if (!ret) { |
c33104f0 | 1309 | lq_sta->action_counter = 0; |
b481de9c | 1310 | goto out; |
dc2453ae | 1311 | } |
b481de9c ZY |
1312 | |
1313 | break; | |
3110bef7 GC |
1314 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1315 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1316 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
eecd6e57 | 1317 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1318 | |
1319 | /* Set up search table to try MIMO */ | |
b481de9c | 1320 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1321 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1322 | |
1323 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1324 | search_tbl->ant_type = ANT_AB; | |
1325 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1326 | search_tbl->ant_type = ANT_AC; | |
1327 | else | |
1328 | search_tbl->ant_type = ANT_BC; | |
1329 | ||
1330 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1331 | break; | |
1332 | ||
fde0db31 | 1333 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1334 | search_tbl, index); |
dc2453ae | 1335 | if (!ret) { |
c33104f0 | 1336 | lq_sta->action_counter = 0; |
b481de9c | 1337 | goto out; |
dc2453ae | 1338 | } |
b481de9c ZY |
1339 | break; |
1340 | } | |
1341 | tbl->action++; | |
3110bef7 GC |
1342 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1343 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1344 | |
1345 | if (tbl->action == start_action) | |
1346 | break; | |
1347 | ||
1348 | } | |
3110bef7 | 1349 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1350 | return 0; |
1351 | ||
3110bef7 GC |
1352 | out: |
1353 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1354 | tbl->action++; |
3110bef7 GC |
1355 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) |
1356 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
b481de9c ZY |
1357 | return 0; |
1358 | ||
1359 | } | |
1360 | ||
77626355 BC |
1361 | /* |
1362 | * Try to switch to new modulation mode from SISO | |
1363 | */ | |
c79dd5b5 | 1364 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1365 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1366 | struct ieee80211_conf *conf, |
4b7679a5 | 1367 | struct ieee80211_sta *sta, int index) |
b481de9c | 1368 | { |
c33104f0 | 1369 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1370 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1371 | struct iwl_scale_tbl_info *search_tbl = | |
1372 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1373 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1374 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1375 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1376 | u8 start_action = tbl->action; |
fde0db31 | 1377 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1378 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1379 | int ret; |
b481de9c ZY |
1380 | |
1381 | for (;;) { | |
c33104f0 | 1382 | lq_sta->action_counter++; |
b481de9c | 1383 | switch (tbl->action) { |
3110bef7 GC |
1384 | case IWL_SISO_SWITCH_ANTENNA1: |
1385 | case IWL_SISO_SWITCH_ANTENNA2: | |
eecd6e57 | 1386 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1387 | |
1388 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1389 | tx_chains_num <= 1) || | |
1390 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1391 | tx_chains_num <= 2)) | |
1392 | break; | |
1393 | ||
b481de9c ZY |
1394 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1395 | break; | |
b481de9c ZY |
1396 | |
1397 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1398 | if (rs_toggle_antenna(valid_tx_ant, |
3110bef7 | 1399 | &search_tbl->current_rate, search_tbl)) |
aade00ce | 1400 | goto out; |
a5e8b505 | 1401 | break; |
3110bef7 GC |
1402 | case IWL_SISO_SWITCH_MIMO2_AB: |
1403 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1404 | case IWL_SISO_SWITCH_MIMO2_BC: | |
a5e8b505 | 1405 | IWL_DEBUG_RATE("LQ: SISO switch to MIMO2\n"); |
b481de9c | 1406 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1407 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1408 | |
1409 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1410 | search_tbl->ant_type = ANT_AB; | |
1411 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1412 | search_tbl->ant_type = ANT_AC; | |
1413 | else | |
1414 | search_tbl->ant_type = ANT_BC; | |
1415 | ||
1416 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1417 | break; | |
1418 | ||
fde0db31 | 1419 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1420 | search_tbl, index); |
3110bef7 | 1421 | if (!ret) |
b481de9c ZY |
1422 | goto out; |
1423 | break; | |
1424 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1425 | if (!tbl->is_fat && |
1426 | !(priv->current_ht_config.sgf & | |
1427 | HT_SHORT_GI_20MHZ)) | |
1428 | break; | |
1429 | if (tbl->is_fat && | |
1430 | !(priv->current_ht_config.sgf & | |
1431 | HT_SHORT_GI_40MHZ)) | |
1432 | break; | |
1433 | ||
eecd6e57 | 1434 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1435 | |
b481de9c | 1436 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1437 | if (is_green) { |
1438 | if (!tbl->is_SGI) | |
1439 | break; | |
1440 | else | |
1441 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1442 | } |
39e88504 | 1443 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1444 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1445 | if (tbl->is_SGI) { |
1446 | s32 tpt = lq_sta->last_tpt / 100; | |
1447 | if (tpt >= search_tbl->expected_tpt[index]) | |
1448 | break; | |
1449 | } | |
1450 | search_tbl->current_rate = rate_n_flags_from_tbl( | |
1451 | search_tbl, index, is_green); | |
b481de9c ZY |
1452 | goto out; |
1453 | } | |
1454 | tbl->action++; | |
1455 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1456 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1457 | |
1458 | if (tbl->action == start_action) | |
1459 | break; | |
1460 | } | |
3110bef7 | 1461 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1462 | return 0; |
1463 | ||
1464 | out: | |
3110bef7 | 1465 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1466 | tbl->action++; |
1467 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
3110bef7 | 1468 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1469 | return 0; |
1470 | } | |
1471 | ||
77626355 BC |
1472 | /* |
1473 | * Try to switch to new modulation mode from MIMO | |
1474 | */ | |
c79dd5b5 | 1475 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
e227ceac | 1476 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1477 | struct ieee80211_conf *conf, |
4b7679a5 | 1478 | struct ieee80211_sta *sta, int index) |
b481de9c | 1479 | { |
c33104f0 | 1480 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1481 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1482 | struct iwl_scale_tbl_info *search_tbl = | |
1483 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1484 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
e227ceac TW |
1485 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1486 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1487 | u8 start_action = tbl->action; |
3110bef7 GC |
1488 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1489 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
aade00ce | 1490 | int ret; |
b481de9c ZY |
1491 | |
1492 | for (;;) { | |
c33104f0 | 1493 | lq_sta->action_counter++; |
b481de9c | 1494 | switch (tbl->action) { |
3110bef7 GC |
1495 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1496 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
1497 | IWL_DEBUG_RATE("LQ: MIMO toggle Antennas\n"); | |
1498 | ||
1499 | if (tx_chains_num <= 2) | |
1500 | break; | |
1501 | ||
1502 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1503 | break; | |
1504 | ||
1505 | memcpy(search_tbl, tbl, sz); | |
1506 | if (rs_toggle_antenna(valid_tx_ant, | |
1507 | &search_tbl->current_rate, search_tbl)) | |
1508 | goto out; | |
1509 | break; | |
1510 | case IWL_MIMO2_SWITCH_SISO_A: | |
1511 | case IWL_MIMO2_SWITCH_SISO_B: | |
1512 | case IWL_MIMO2_SWITCH_SISO_C: | |
eecd6e57 | 1513 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1514 | |
77626355 | 1515 | /* Set up new search table for SISO */ |
b481de9c | 1516 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1517 | |
3110bef7 | 1518 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1519 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1520 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1521 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1522 | else |
1523 | search_tbl->ant_type = ANT_C; | |
1524 | ||
1525 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1526 | break; | |
b481de9c | 1527 | |
c33104f0 | 1528 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1529 | search_tbl, index); |
3110bef7 | 1530 | if (!ret) |
b481de9c | 1531 | goto out; |
3110bef7 | 1532 | |
b481de9c ZY |
1533 | break; |
1534 | ||
3110bef7 | 1535 | case IWL_MIMO2_SWITCH_GI: |
a9841013 EG |
1536 | if (!tbl->is_fat && |
1537 | !(priv->current_ht_config.sgf & | |
1538 | HT_SHORT_GI_20MHZ)) | |
1539 | break; | |
1540 | if (tbl->is_fat && | |
1541 | !(priv->current_ht_config.sgf & | |
1542 | HT_SHORT_GI_40MHZ)) | |
1543 | break; | |
1544 | ||
eecd6e57 | 1545 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1546 | |
1547 | /* Set up new search table for MIMO */ | |
b481de9c | 1548 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1549 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1550 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1551 | /* |
1552 | * If active table already uses the fastest possible | |
1553 | * modulation (dual stream with short guard interval), | |
1554 | * and it's working well, there's no need to look | |
1555 | * for a better type of modulation! | |
1556 | */ | |
39e88504 | 1557 | if (tbl->is_SGI) { |
c33104f0 | 1558 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1559 | if (tpt >= search_tbl->expected_tpt[index]) |
1560 | break; | |
b481de9c | 1561 | } |
39e88504 GC |
1562 | search_tbl->current_rate = rate_n_flags_from_tbl( |
1563 | search_tbl, index, is_green); | |
b481de9c ZY |
1564 | goto out; |
1565 | ||
1566 | } | |
1567 | tbl->action++; | |
3110bef7 GC |
1568 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1569 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1570 | |
1571 | if (tbl->action == start_action) | |
1572 | break; | |
1573 | } | |
3110bef7 | 1574 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1575 | return 0; |
1576 | out: | |
3110bef7 | 1577 | lq_sta->search_better_tbl = 1; |
b481de9c | 1578 | tbl->action++; |
3110bef7 GC |
1579 | if (tbl->action > IWL_MIMO2_SWITCH_GI) |
1580 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; | |
b481de9c ZY |
1581 | return 0; |
1582 | ||
1583 | } | |
1584 | ||
77626355 BC |
1585 | /* |
1586 | * Check whether we should continue using same modulation mode, or | |
1587 | * begin search for a new mode, based on: | |
1588 | * 1) # tx successes or failures while using this mode | |
1589 | * 2) # times calling this function | |
1590 | * 3) elapsed time in this mode (not used, for now) | |
1591 | */ | |
e227ceac | 1592 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1593 | { |
e227ceac | 1594 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1595 | int i; |
1596 | int active_tbl; | |
1597 | int flush_interval_passed = 0; | |
bf403db8 | 1598 | struct iwl_priv *priv; |
b481de9c | 1599 | |
bf403db8 | 1600 | priv = lq_sta->drv; |
c33104f0 | 1601 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1602 | |
c33104f0 | 1603 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1604 | |
77626355 | 1605 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1606 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1607 | |
77626355 | 1608 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1609 | if (lq_sta->flush_timer) |
b481de9c ZY |
1610 | flush_interval_passed = |
1611 | time_after(jiffies, | |
c33104f0 | 1612 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1613 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1614 | ||
77626355 BC |
1615 | /* |
1616 | * Check if we should allow search for new modulation mode. | |
1617 | * If many frames have failed or succeeded, or we've used | |
1618 | * this same modulation for a long time, allow search, and | |
1619 | * reset history stats that keep track of whether we should | |
1620 | * allow a new search. Also (below) reset all bitmaps and | |
1621 | * stats in active history. | |
1622 | */ | |
c33104f0 TW |
1623 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1624 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1625 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1626 | && (flush_interval_passed))) { |
eecd6e57 | 1627 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1628 | lq_sta->total_failed, |
1629 | lq_sta->total_success, | |
b481de9c | 1630 | flush_interval_passed); |
77626355 BC |
1631 | |
1632 | /* Allow search for new mode */ | |
c33104f0 TW |
1633 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1634 | lq_sta->total_failed = 0; | |
1635 | lq_sta->total_success = 0; | |
1636 | lq_sta->flush_timer = 0; | |
77626355 BC |
1637 | |
1638 | /* | |
1639 | * Else if we've used this modulation mode enough repetitions | |
1640 | * (regardless of elapsed time or success/failure), reset | |
1641 | * history bitmaps and rate-specific stats for all rates in | |
1642 | * active table. | |
1643 | */ | |
403ab56b | 1644 | } else { |
c33104f0 TW |
1645 | lq_sta->table_count++; |
1646 | if (lq_sta->table_count >= | |
1647 | lq_sta->table_count_limit) { | |
1648 | lq_sta->table_count = 0; | |
b481de9c | 1649 | |
eecd6e57 | 1650 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1651 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1652 | rs_rate_scale_clear_window( | |
1653 | &(tbl->win[i])); | |
1654 | } | |
1655 | } | |
1656 | ||
77626355 BC |
1657 | /* If transitioning to allow "search", reset all history |
1658 | * bitmaps and stats in active table (this will become the new | |
1659 | * "search" table). */ | |
c33104f0 | 1660 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1661 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1662 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1663 | } | |
1664 | } | |
1665 | } | |
1666 | ||
77626355 BC |
1667 | /* |
1668 | * Do rate scaling and search for new modulation mode. | |
1669 | */ | |
c79dd5b5 | 1670 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 1671 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
1672 | struct ieee80211_sta *sta, |
1673 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 1674 | { |
4b7679a5 | 1675 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 1676 | struct ieee80211_conf *conf = &hw->conf; |
b481de9c ZY |
1677 | int low = IWL_RATE_INVALID; |
1678 | int high = IWL_RATE_INVALID; | |
1679 | int index; | |
1680 | int i; | |
e227ceac | 1681 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1682 | int current_tpt = IWL_INVALID_VALUE; |
1683 | int low_tpt = IWL_INVALID_VALUE; | |
1684 | int high_tpt = IWL_INVALID_VALUE; | |
1685 | u32 fail_count; | |
1686 | s8 scale_action = 0; | |
fd7c8a40 HH |
1687 | __le16 fc; |
1688 | u16 rate_mask; | |
b481de9c | 1689 | u8 update_lq = 0; |
e227ceac | 1690 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1691 | u16 rate_scale_index_msk = 0; |
39e88504 | 1692 | u32 rate; |
b481de9c ZY |
1693 | u8 is_green = 0; |
1694 | u8 active_tbl = 0; | |
1695 | u8 done_search = 0; | |
1696 | u16 high_low; | |
a5e8b505 | 1697 | s32 sr; |
0c11b4de | 1698 | u8 tid = MAX_TID_COUNT; |
b481de9c ZY |
1699 | |
1700 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1701 | ||
fd7c8a40 | 1702 | fc = hdr->frame_control; |
b481de9c ZY |
1703 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
1704 | /* Send management frames and broadcast/multicast data using | |
1705 | * lowest rate. */ | |
1706 | /* TODO: this could probably be improved.. */ | |
1707 | return; | |
1708 | } | |
1709 | ||
4b7679a5 | 1710 | if (!sta || !lq_sta) |
b481de9c ZY |
1711 | return; |
1712 | ||
4b7679a5 | 1713 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1714 | |
faa29718 RR |
1715 | tid = rs_tl_add_packet(lq_sta, hdr); |
1716 | ||
77626355 BC |
1717 | /* |
1718 | * Select rate-scale / modulation-mode table to work with in | |
1719 | * the rest of this function: "search" if searching for better | |
1720 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1721 | */ | |
c33104f0 TW |
1722 | if (!lq_sta->search_better_tbl) |
1723 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1724 | else |
c33104f0 | 1725 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1726 | |
c33104f0 TW |
1727 | tbl = &(lq_sta->lq_info[active_tbl]); |
1728 | is_green = lq_sta->is_green; | |
b481de9c | 1729 | |
77626355 | 1730 | /* current tx rate */ |
b7e35008 | 1731 | index = lq_sta->last_txrate_idx; |
b481de9c ZY |
1732 | |
1733 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1734 | tbl->lq_type); | |
1735 | ||
77626355 | 1736 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1737 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1738 | |
1739 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1740 | ||
1741 | /* mask with station rate restriction */ | |
1742 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1743 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1744 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1745 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1746 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1747 | else |
1748 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1749 | lq_sta->supp_rates); |
b481de9c ZY |
1750 | |
1751 | } else | |
1752 | rate_scale_index_msk = rate_mask; | |
1753 | ||
1754 | if (!rate_scale_index_msk) | |
1755 | rate_scale_index_msk = rate_mask; | |
1756 | ||
07bc28ed GC |
1757 | if (!((1 << index) & rate_scale_index_msk)) { |
1758 | IWL_ERROR("Current Rate is not valid\n"); | |
1759 | return; | |
b481de9c ZY |
1760 | } |
1761 | ||
77626355 | 1762 | /* Get expected throughput table and history window for current rate */ |
07bc28ed GC |
1763 | if (!tbl->expected_tpt) { |
1764 | IWL_ERROR("tbl->expected_tpt is NULL\n"); | |
1765 | return; | |
1766 | } | |
b481de9c ZY |
1767 | |
1768 | window = &(tbl->win[index]); | |
1769 | ||
77626355 BC |
1770 | /* |
1771 | * If there is not enough history to calculate actual average | |
1772 | * throughput, keep analyzing results of more tx frames, without | |
1773 | * changing rate or mode (bypass most of the rest of this function). | |
1774 | * Set up new rate table in uCode only if old rate is not supported | |
1775 | * in current association (use new rate found above). | |
1776 | */ | |
b481de9c | 1777 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1778 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1779 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1780 | IWL_DEBUG_RATE("LQ: still below TH. succ=%d total=%d " | |
b481de9c ZY |
1781 | "for index %d\n", |
1782 | window->success_counter, window->counter, index); | |
77626355 BC |
1783 | |
1784 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1785 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1786 | |
1787 | /* Should we stay with this modulation mode, | |
1788 | * or search for a new one? */ | |
c33104f0 | 1789 | rs_stay_in_table(lq_sta); |
77626355 | 1790 | |
b481de9c | 1791 | goto out; |
3110bef7 | 1792 | } |
b481de9c | 1793 | |
77626355 BC |
1794 | /* Else we have enough samples; calculate estimate of |
1795 | * actual average throughput */ | |
3110bef7 GC |
1796 | |
1797 | BUG_ON(window->average_tpt != ((window->success_ratio * | |
1798 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 1799 | |
77626355 | 1800 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1801 | if (lq_sta->search_better_tbl) { |
b481de9c | 1802 | |
77626355 BC |
1803 | /* If good success, continue using the "search" mode; |
1804 | * no need to send new link quality command, since we're | |
1805 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1806 | if (window->average_tpt > lq_sta->last_tpt) { |
1807 | ||
3110bef7 | 1808 | IWL_DEBUG_RATE("LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
1809 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1810 | window->success_ratio, | |
1811 | window->average_tpt, | |
1812 | lq_sta->last_tpt); | |
1813 | ||
1814 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1815 | lq_sta->enable_counter = 1; |
07bc28ed | 1816 | |
77626355 | 1817 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1818 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1819 | current_tpt = window->average_tpt; |
77626355 BC |
1820 | |
1821 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1822 | } else { |
07bc28ed GC |
1823 | |
1824 | IWL_DEBUG_RATE("LQ: GOING BACK TO THE OLD TABLE " | |
1825 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1826 | window->success_ratio, | |
1827 | window->average_tpt, | |
1828 | lq_sta->last_tpt); | |
1829 | ||
77626355 | 1830 | /* Nullify "search" table */ |
b481de9c | 1831 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1832 | |
1833 | /* Revert to "active" table */ | |
c33104f0 TW |
1834 | active_tbl = lq_sta->active_tbl; |
1835 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1836 | |
77626355 | 1837 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 1838 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 1839 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1840 | |
77626355 | 1841 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1842 | update_lq = 1; |
b481de9c | 1843 | } |
77626355 BC |
1844 | |
1845 | /* Either way, we've made a decision; modulation mode | |
1846 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1847 | lq_sta->search_better_tbl = 0; |
77626355 | 1848 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1849 | goto lq_update; |
1850 | } | |
1851 | ||
77626355 BC |
1852 | /* (Else) not in search of better modulation mode, try for better |
1853 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1854 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1855 | tbl->lq_type); |
1856 | low = high_low & 0xff; | |
1857 | high = (high_low >> 8) & 0xff; | |
1858 | ||
a5e8b505 GC |
1859 | sr = window->success_ratio; |
1860 | ||
77626355 | 1861 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1862 | current_tpt = window->average_tpt; |
b481de9c ZY |
1863 | if (low != IWL_RATE_INVALID) |
1864 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1865 | if (high != IWL_RATE_INVALID) |
1866 | high_tpt = tbl->win[high].average_tpt; | |
1867 | ||
a5e8b505 | 1868 | scale_action = 0; |
b481de9c | 1869 | |
77626355 | 1870 | /* Too many failures, decrease rate */ |
a5e8b505 | 1871 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
b481de9c ZY |
1872 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
1873 | scale_action = -1; | |
77626355 BC |
1874 | |
1875 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 1876 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
1877 | (high_tpt == IWL_INVALID_VALUE)) { |
1878 | ||
1879 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
1880 | scale_action = 1; | |
1881 | else if (low != IWL_RATE_INVALID) | |
1882 | scale_action = -1; | |
1883 | } | |
77626355 BC |
1884 | |
1885 | /* Both adjacent throughputs are measured, but neither one has better | |
1886 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1887 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1888 | (high_tpt != IWL_INVALID_VALUE) && | |
1889 | (low_tpt < current_tpt) && | |
1890 | (high_tpt < current_tpt)) | |
1891 | scale_action = 0; | |
77626355 BC |
1892 | |
1893 | /* At least one adjacent rate's throughput is measured, | |
1894 | * and may have better performance. */ | |
b481de9c | 1895 | else { |
77626355 | 1896 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1897 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1898 | /* Higher rate has better throughput */ |
a5e8b505 GC |
1899 | if (high_tpt > current_tpt && |
1900 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 1901 | scale_action = 1; |
a5e8b505 | 1902 | } else { |
b481de9c ZY |
1903 | IWL_DEBUG_RATE |
1904 | ("decrease rate because of high tpt\n"); | |
1905 | scale_action = -1; | |
1906 | } | |
77626355 BC |
1907 | |
1908 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1909 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1910 | /* Lower rate has better throughput */ |
b481de9c ZY |
1911 | if (low_tpt > current_tpt) { |
1912 | IWL_DEBUG_RATE | |
1913 | ("decrease rate because of low tpt\n"); | |
1914 | scale_action = -1; | |
a5e8b505 | 1915 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 1916 | scale_action = 1; |
a5e8b505 | 1917 | } |
b481de9c ZY |
1918 | } |
1919 | } | |
1920 | ||
77626355 BC |
1921 | /* Sanity check; asked for decrease, but success rate or throughput |
1922 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
1923 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
1924 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 1925 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
1926 | scale_action = 0; |
1927 | ||
1928 | switch (scale_action) { | |
1929 | case -1: | |
77626355 | 1930 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1931 | if (low != IWL_RATE_INVALID) { |
1932 | update_lq = 1; | |
1933 | index = low; | |
1934 | } | |
1935 | break; | |
1936 | case 1: | |
77626355 | 1937 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1938 | if (high != IWL_RATE_INVALID) { |
1939 | update_lq = 1; | |
1940 | index = high; | |
1941 | } | |
1942 | ||
1943 | break; | |
1944 | case 0: | |
77626355 | 1945 | /* No change */ |
b481de9c ZY |
1946 | default: |
1947 | break; | |
1948 | } | |
1949 | ||
eecd6e57 | 1950 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1951 | "high %d type %d\n", |
1952 | index, scale_action, low, high, tbl->lq_type); | |
1953 | ||
a5e8b505 | 1954 | lq_update: |
77626355 | 1955 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1956 | if (update_lq) { |
39e88504 | 1957 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
07bc28ed | 1958 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1959 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1960 | } |
77626355 BC |
1961 | |
1962 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1963 | rs_stay_in_table(lq_sta); |
b481de9c | 1964 | |
77626355 BC |
1965 | /* |
1966 | * Search for new modulation mode if we're: | |
1967 | * 1) Not changing rates right now | |
1968 | * 2) Not just finishing up a search | |
1969 | * 3) Allowing a new search | |
1970 | */ | |
47cfd463 | 1971 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 1972 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1973 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1974 | |
77626355 BC |
1975 | /* Select a new "search" modulation mode to try. |
1976 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1977 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1978 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1979 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1980 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1981 | else |
c33104f0 | 1982 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1983 | |
77626355 | 1984 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 1985 | if (lq_sta->search_better_tbl) { |
77626355 | 1986 | /* Access the "search" table, clear its history. */ |
c33104f0 | 1987 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
1988 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1989 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1990 | ||
77626355 | 1991 | /* Use new "search" start rate */ |
e7d326ac | 1992 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 1993 | |
eecd6e57 | 1994 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 | 1995 | tbl->current_rate, index); |
07bc28ed | 1996 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 1997 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1998 | } |
b481de9c | 1999 | |
77626355 BC |
2000 | /* If the "active" (non-search) mode was legacy, |
2001 | * and we've tried switching antennas, | |
2002 | * but we haven't been able to try HT modes (not available), | |
2003 | * stay with best antenna legacy modulation for a while | |
2004 | * before next round of mode comparisons. */ | |
c33104f0 | 2005 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 2006 | if (is_legacy(tbl1->lq_type) && |
270243a5 | 2007 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
c33104f0 TW |
2008 | (lq_sta->action_counter >= 1)) { |
2009 | lq_sta->action_counter = 0; | |
eecd6e57 | 2010 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
bf403db8 | 2011 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2012 | } |
2013 | ||
77626355 BC |
2014 | /* If we're in an HT mode, and all 3 mode switch actions |
2015 | * have been tried and compared, stay in this best modulation | |
2016 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2017 | if (lq_sta->enable_counter && |
2018 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2019 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2020 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2021 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 2022 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 2023 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 2024 | } |
c33104f0 | 2025 | lq_sta->action_counter = 0; |
bf403db8 | 2026 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2027 | } |
77626355 BC |
2028 | |
2029 | /* | |
2030 | * Else, don't search for a new modulation mode. | |
2031 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2032 | * 1) Not changing rates right now | |
2033 | * 2) Not just finishing up a search | |
2034 | * 3) flush timer is empty | |
2035 | */ | |
b481de9c | 2036 | } else { |
c33104f0 TW |
2037 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2038 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2039 | } |
2040 | ||
2041 | out: | |
39e88504 | 2042 | tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green); |
b481de9c | 2043 | i = index; |
b7e35008 | 2044 | lq_sta->last_txrate_idx = i; |
b481de9c | 2045 | |
b481de9c ZY |
2046 | return; |
2047 | } | |
2048 | ||
2049 | ||
c79dd5b5 | 2050 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2051 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2052 | struct ieee80211_sta *sta, |
2053 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2054 | { |
e227ceac | 2055 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2056 | int rate_idx; |
aade00ce | 2057 | int i; |
39e88504 | 2058 | u32 rate; |
aade00ce GC |
2059 | u8 use_green = rs_use_green(priv, conf); |
2060 | u8 active_tbl = 0; | |
2061 | u8 valid_tx_ant; | |
b481de9c | 2062 | |
4b7679a5 | 2063 | if (!sta || !lq_sta) |
b481de9c ZY |
2064 | goto out; |
2065 | ||
b7e35008 | 2066 | i = lq_sta->last_txrate_idx; |
b481de9c | 2067 | |
c33104f0 | 2068 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2069 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2070 | goto out; |
2071 | ||
aade00ce GC |
2072 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2073 | ||
c33104f0 TW |
2074 | if (!lq_sta->search_better_tbl) |
2075 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2076 | else |
c33104f0 | 2077 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2078 | |
c33104f0 | 2079 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2080 | |
2081 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2082 | i = 0; | |
2083 | ||
fde0db31 | 2084 | /* FIXME:RS: This is also wrong in 4965 */ |
1826dcc0 | 2085 | rate = iwl_rates[i].plcp; |
39e88504 GC |
2086 | rate |= RATE_MCS_ANT_B_MSK; |
2087 | rate &= ~RATE_MCS_ANT_A_MSK; | |
b481de9c ZY |
2088 | |
2089 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2090 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2091 | |
fde0db31 | 2092 | tbl->ant_type = ANT_B; |
39e88504 | 2093 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2094 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2095 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2096 | |
39e88504 GC |
2097 | rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green); |
2098 | tbl->current_rate = rate; | |
eecd6e57 | 2099 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2100 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2101 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2102 | out: |
2103 | return; | |
2104 | } | |
2105 | ||
4b7679a5 JB |
2106 | static void rs_get_rate(void *priv_r, struct ieee80211_supported_band *sband, |
2107 | struct ieee80211_sta *sta, void *priv_sta, | |
2108 | struct sk_buff *skb, struct rate_selection *sel) | |
b481de9c ZY |
2109 | { |
2110 | ||
2111 | int i; | |
4b7679a5 JB |
2112 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2113 | struct ieee80211_conf *conf = &priv->hw->conf; | |
b481de9c | 2114 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
fd7c8a40 | 2115 | __le16 fc; |
e227ceac | 2116 | struct iwl_lq_sta *lq_sta; |
b481de9c | 2117 | |
58826351 | 2118 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2119 | |
2bc454b0 MW |
2120 | /* Send management frames and broadcast/multicast data using lowest |
2121 | * rate. */ | |
fd7c8a40 | 2122 | fc = hdr->frame_control; |
2bc454b0 | 2123 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || |
4b7679a5 JB |
2124 | !sta || !priv_sta) { |
2125 | sel->rate_idx = rate_lowest_index(sband, sta); | |
2126 | return; | |
b481de9c ZY |
2127 | } |
2128 | ||
4b7679a5 | 2129 | lq_sta = (struct iwl_lq_sta *)priv_sta; |
b7e35008 | 2130 | i = lq_sta->last_txrate_idx; |
b481de9c | 2131 | |
05c914fe | 2132 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2133 | !lq_sta->ibss_sta_added) { |
947b13a7 | 2134 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
0795af57 | 2135 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
2136 | |
2137 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2138 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2139 | print_mac(mac, hdr->addr1)); | |
4f40e4d9 | 2140 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2141 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2142 | } |
2143 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2144 | lq_sta->lq.sta_id = sta_id; |
2145 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2146 | lq_sta->ibss_sta_added = 1; | |
4b7679a5 | 2147 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c | 2148 | } |
b481de9c ZY |
2149 | } |
2150 | ||
1abbe498 | 2151 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
4b7679a5 JB |
2152 | sel->rate_idx = rate_lowest_index(sband, sta); |
2153 | return; | |
1abbe498 | 2154 | } |
b481de9c | 2155 | |
2e92e6f2 JB |
2156 | if (sband->band == IEEE80211_BAND_5GHZ) |
2157 | i -= IWL_FIRST_OFDM_RATE; | |
2158 | sel->rate_idx = i; | |
b481de9c ZY |
2159 | } |
2160 | ||
4b7679a5 JB |
2161 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2162 | gfp_t gfp) | |
b481de9c | 2163 | { |
e227ceac | 2164 | struct iwl_lq_sta *lq_sta; |
bf403db8 | 2165 | struct iwl_priv *priv; |
b481de9c ZY |
2166 | int i, j; |
2167 | ||
bf403db8 | 2168 | priv = (struct iwl_priv *)priv_rate; |
b481de9c ZY |
2169 | IWL_DEBUG_RATE("create station rate scale window\n"); |
2170 | ||
e227ceac | 2171 | lq_sta = kzalloc(sizeof(struct iwl_lq_sta), gfp); |
b481de9c | 2172 | |
c33104f0 | 2173 | if (lq_sta == NULL) |
b481de9c | 2174 | return NULL; |
c33104f0 | 2175 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2176 | |
63fddb9f | 2177 | |
b481de9c ZY |
2178 | for (j = 0; j < LQ_SIZE; j++) |
2179 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2180 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2181 | |
c33104f0 | 2182 | return lq_sta; |
b481de9c ZY |
2183 | } |
2184 | ||
4b7679a5 JB |
2185 | static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, |
2186 | struct ieee80211_sta *sta, void *priv_sta) | |
b481de9c ZY |
2187 | { |
2188 | int i, j; | |
4b7679a5 JB |
2189 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2190 | struct ieee80211_conf *conf = &priv->hw->conf; | |
e227ceac | 2191 | struct iwl_lq_sta *lq_sta = priv_sta; |
b481de9c | 2192 | |
c33104f0 | 2193 | lq_sta->flush_timer = 0; |
4b7679a5 | 2194 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2195 | for (j = 0; j < LQ_SIZE; j++) |
2196 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2197 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2198 | |
3110bef7 | 2199 | IWL_DEBUG_RATE("LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2200 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2201 | * the lowest or the highest rate.. Could consider using RSSI from | |
2202 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2203 | * after assoc.. */ | |
2204 | ||
c33104f0 | 2205 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2206 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
4b7679a5 | 2207 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 JP |
2208 | DECLARE_MAC_BUF(mac); |
2209 | ||
b481de9c | 2210 | /* for IBSS the call are from tasklet */ |
eecd6e57 | 2211 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
4b7679a5 | 2212 | print_mac(mac, sta->addr)); |
b481de9c ZY |
2213 | |
2214 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 | 2215 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
4b7679a5 JB |
2216 | print_mac(mac, sta->addr)); |
2217 | sta_id = iwl_add_station_flags(priv, sta->addr, | |
67d62035 | 2218 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2219 | } |
2220 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2221 | lq_sta->lq.sta_id = sta_id; |
2222 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2223 | } |
2224 | /* FIXME: this is w/a remove it later */ | |
2225 | priv->assoc_station_added = 1; | |
2226 | } | |
2227 | ||
77626355 | 2228 | /* Find highest tx rate supported by hardware and destination station */ |
ae17e986 | 2229 | lq_sta->last_txrate_idx = 3; |
8318d78a | 2230 | for (i = 0; i < sband->n_bitrates; i++) |
4b7679a5 | 2231 | if (sta->supp_rates[sband->band] & BIT(i)) |
ae17e986 | 2232 | lq_sta->last_txrate_idx = i; |
8318d78a | 2233 | |
05ecc2c1 | 2234 | /* For MODE_IEEE80211A, skip over cck rates in global rate table */ |
4b7679a5 | 2235 | if (sband->band == IEEE80211_BAND_5GHZ) |
b7e35008 | 2236 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; |
b481de9c | 2237 | |
c33104f0 | 2238 | lq_sta->is_dup = 0; |
c33104f0 | 2239 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2240 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2241 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2242 | lq_sta->band = priv->band; |
77626355 BC |
2243 | /* |
2244 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2245 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2246 | */ | |
263b5f5a RR |
2247 | lq_sta->active_siso_rate = conf->ht_conf.supp_mcs_set[0] << 1; |
2248 | lq_sta->active_siso_rate |= conf->ht_conf.supp_mcs_set[0] & 0x1; | |
c33104f0 | 2249 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2250 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2251 | |
77626355 | 2252 | /* Same here */ |
263b5f5a RR |
2253 | lq_sta->active_mimo2_rate = conf->ht_conf.supp_mcs_set[1] << 1; |
2254 | lq_sta->active_mimo2_rate |= conf->ht_conf.supp_mcs_set[1] & 0x1; | |
fde0db31 GC |
2255 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2256 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2257 | ||
263b5f5a RR |
2258 | lq_sta->active_mimo3_rate = conf->ht_conf.supp_mcs_set[2] << 1; |
2259 | lq_sta->active_mimo3_rate |= conf->ht_conf.supp_mcs_set[2] & 0x1; | |
fde0db31 GC |
2260 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2261 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2262 | ||
07bc28ed | 2263 | IWL_DEBUG_RATE("SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2264 | lq_sta->active_siso_rate, |
fde0db31 GC |
2265 | lq_sta->active_mimo2_rate, |
2266 | lq_sta->active_mimo3_rate); | |
2267 | ||
07bc28ed GC |
2268 | /* These values will be overriden later */ |
2269 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; | |
2270 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2271 | ||
0c11b4de RR |
2272 | /* as default allow aggregation for all tids */ |
2273 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2274 | lq_sta->drv = priv; |
b481de9c | 2275 | |
4b7679a5 | 2276 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2277 | } |
2278 | ||
fde0db31 | 2279 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 2280 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2281 | { |
e227ceac | 2282 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2283 | int index = 0; |
b481de9c | 2284 | int rate_idx; |
1b696de2 | 2285 | int repeat_rate = 0; |
aade00ce | 2286 | u8 ant_toggle_cnt = 0; |
b481de9c | 2287 | u8 use_ht_possible = 1; |
aade00ce | 2288 | u8 valid_tx_ant = 0; |
07bc28ed | 2289 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2290 | |
77626355 | 2291 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2292 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2293 | |
39e88504 | 2294 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2295 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2296 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2297 | &tbl_type, &rate_idx); |
2298 | ||
77626355 | 2299 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2300 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2301 | ant_toggle_cnt = 1; |
1b696de2 | 2302 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2303 | } else { |
1b696de2 | 2304 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2305 | } |
b481de9c ZY |
2306 | |
2307 | lq_cmd->general_params.mimo_delimiter = | |
2308 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2309 | |
2310 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2311 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2312 | |
07bc28ed GC |
2313 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2314 | lq_cmd->general_params.single_stream_ant_msk = | |
2315 | tbl_type.ant_type; | |
2316 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2317 | lq_cmd->general_params.dual_stream_ant_msk = | |
2318 | tbl_type.ant_type; | |
2319 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2320 | |
2321 | index++; | |
1b696de2 | 2322 | repeat_rate--; |
b481de9c | 2323 | |
aade00ce GC |
2324 | if (priv) |
2325 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2326 | ||
77626355 | 2327 | /* Fill rest of rate table */ |
b481de9c | 2328 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2329 | /* Repeat initial/next rate. |
2330 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2331 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2332 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2333 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2334 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2335 | ant_toggle_cnt++; | |
2336 | else if (priv && | |
2337 | rs_toggle_antenna(valid_tx_ant, | |
2338 | &new_rate, &tbl_type)) | |
2339 | ant_toggle_cnt = 1; | |
2340 | } | |
98d7e09a | 2341 | |
77626355 | 2342 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2343 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2344 | |
2345 | /* Fill next table entry */ | |
b481de9c | 2346 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2347 | cpu_to_le32(new_rate); |
1b696de2 | 2348 | repeat_rate--; |
b481de9c ZY |
2349 | index++; |
2350 | } | |
2351 | ||
39e88504 | 2352 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2353 | &rate_idx); |
2354 | ||
77626355 BC |
2355 | /* Indicate to uCode which entries might be MIMO. |
2356 | * If initial rate was MIMO, this will finally end up | |
2357 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2358 | if (is_mimo(tbl_type.lq_type)) |
2359 | lq_cmd->general_params.mimo_delimiter = index; | |
2360 | ||
77626355 | 2361 | /* Get next rate */ |
39e88504 GC |
2362 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2363 | use_ht_possible); | |
b481de9c | 2364 | |
77626355 | 2365 | /* How many times should we repeat the next rate? */ |
b481de9c | 2366 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2367 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2368 | ant_toggle_cnt++; | |
2369 | else if (priv && | |
2370 | rs_toggle_antenna(valid_tx_ant, | |
2371 | &new_rate, &tbl_type)) | |
2372 | ant_toggle_cnt = 1; | |
2373 | ||
1b696de2 | 2374 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2375 | } else { |
1b696de2 | 2376 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2377 | } |
b481de9c | 2378 | |
77626355 BC |
2379 | /* Don't allow HT rates after next pass. |
2380 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2381 | use_ht_possible = 0; |
2382 | ||
77626355 | 2383 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2384 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2385 | |
2386 | /* Fill next table entry */ | |
39e88504 | 2387 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2388 | |
2389 | index++; | |
1b696de2 | 2390 | repeat_rate--; |
b481de9c ZY |
2391 | } |
2392 | ||
5e1dd8dc | 2393 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2394 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2395 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2396 | } |
2397 | ||
4b7679a5 | 2398 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2399 | { |
4b7679a5 | 2400 | return hw->priv; |
b481de9c ZY |
2401 | } |
2402 | /* rate scale requires free function to be implemented */ | |
2403 | static void rs_free(void *priv_rate) | |
2404 | { | |
2405 | return; | |
2406 | } | |
2407 | ||
2408 | static void rs_clear(void *priv_rate) | |
2409 | { | |
e170402e | 2410 | #ifdef CONFIG_IWLWIFI_DEBUG |
c79dd5b5 | 2411 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
b481de9c ZY |
2412 | |
2413 | IWL_DEBUG_RATE("enter\n"); | |
2414 | ||
36e1f16e | 2415 | /* TODO - add rate scale state reset */ |
b481de9c ZY |
2416 | |
2417 | IWL_DEBUG_RATE("leave\n"); | |
e170402e | 2418 | #endif /* CONFIG_IWLWIFI_DEBUG */ |
b481de9c ZY |
2419 | } |
2420 | ||
4b7679a5 JB |
2421 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2422 | void *priv_sta) | |
b481de9c | 2423 | { |
e227ceac | 2424 | struct iwl_lq_sta *lq_sta = priv_sta; |
45527c2c | 2425 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c ZY |
2426 | |
2427 | IWL_DEBUG_RATE("enter\n"); | |
c33104f0 | 2428 | kfree(lq_sta); |
b481de9c ZY |
2429 | IWL_DEBUG_RATE("leave\n"); |
2430 | } | |
2431 | ||
2432 | ||
93dc646a | 2433 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2434 | static int open_file_generic(struct inode *inode, struct file *file) |
2435 | { | |
2436 | file->private_data = inode->i_private; | |
2437 | return 0; | |
2438 | } | |
e227ceac TW |
2439 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2440 | u32 *rate_n_flags, int index) | |
98d7e09a | 2441 | { |
bf403db8 EK |
2442 | struct iwl_priv *priv; |
2443 | ||
2444 | priv = lq_sta->drv; | |
39e88504 GC |
2445 | if (lq_sta->dbg_fixed_rate) { |
2446 | if (index < 12) { | |
2447 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2448 | } else { | |
2449 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2450 | *rate_n_flags = 0x800D; | |
2451 | else | |
2452 | *rate_n_flags = 0x820A; | |
2453 | } | |
98d7e09a | 2454 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2455 | } else { |
2456 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2457 | } |
98d7e09a | 2458 | } |
5ae212c9 | 2459 | |
98d7e09a ZY |
2460 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2461 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2462 | { | |
e227ceac | 2463 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2464 | struct iwl_priv *priv; |
98d7e09a ZY |
2465 | char buf[64]; |
2466 | int buf_size; | |
2467 | u32 parsed_rate; | |
2468 | ||
bf403db8 | 2469 | priv = lq_sta->drv; |
98d7e09a ZY |
2470 | memset(buf, 0, sizeof(buf)); |
2471 | buf_size = min(count, sizeof(buf) - 1); | |
2472 | if (copy_from_user(buf, user_buf, buf_size)) | |
2473 | return -EFAULT; | |
2474 | ||
2475 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2476 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2477 | else |
39e88504 | 2478 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2479 | |
39e88504 GC |
2480 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2481 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2482 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2483 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2484 | |
2485 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2486 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2487 | |
39e88504 | 2488 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2489 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2490 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2491 | } |
2492 | ||
2493 | return count; | |
2494 | } | |
0209dc11 | 2495 | |
5ae212c9 ZY |
2496 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2497 | char __user *user_buf, size_t count, loff_t *ppos) | |
2498 | { | |
2499 | char buff[1024]; | |
2500 | int desc = 0; | |
2501 | int i = 0; | |
2502 | ||
e227ceac | 2503 | struct iwl_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2504 | |
c33104f0 | 2505 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2506 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2507 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2508 | lq_sta->active_legacy_rate); |
98d7e09a | 2509 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2510 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2511 | desc += sprintf(buff+desc, "general:" |
2512 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2513 | lq_sta->lq.general_params.flags, |
2514 | lq_sta->lq.general_params.mimo_delimiter, | |
2515 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2516 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2517 | |
2518 | desc += sprintf(buff+desc, "agg:" | |
2519 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2520 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2521 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2522 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2523 | |
2524 | desc += sprintf(buff+desc, | |
2525 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2526 | lq_sta->lq.general_params.start_rate_index[0], |
2527 | lq_sta->lq.general_params.start_rate_index[1], | |
2528 | lq_sta->lq.general_params.start_rate_index[2], | |
2529 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2530 | |
2531 | ||
2532 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2533 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2534 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2535 | |
2536 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2537 | } | |
2538 | ||
2539 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2540 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2541 | .read = rs_sta_dbgfs_scale_table_read, |
2542 | .open = open_file_generic, | |
2543 | }; | |
0209dc11 ZY |
2544 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2545 | char __user *user_buf, size_t count, loff_t *ppos) | |
2546 | { | |
2547 | char buff[1024]; | |
2548 | int desc = 0; | |
2549 | int i, j; | |
2550 | ||
e227ceac | 2551 | struct iwl_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2552 | for (i = 0; i < LQ_SIZE; i++) { |
2553 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2554 | "rate=0x%X\n", | |
c33104f0 TW |
2555 | lq_sta->active_tbl == i?"*":"x", |
2556 | lq_sta->lq_info[i].lq_type, | |
2557 | lq_sta->lq_info[i].is_SGI, | |
2558 | lq_sta->lq_info[i].is_fat, | |
2559 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2560 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2561 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2562 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2563 | "counter=%d success=%d %%=%d\n", |
2564 | lq_sta->lq_info[i].win[j].counter, | |
2565 | lq_sta->lq_info[i].win[j].success_counter, | |
2566 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2567 | } |
2568 | } | |
2569 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2570 | } | |
2571 | ||
2572 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2573 | .read = rs_sta_dbgfs_stats_table_read, | |
2574 | .open = open_file_generic, | |
2575 | }; | |
5ae212c9 | 2576 | |
93dc646a ZY |
2577 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2578 | struct dentry *dir) | |
2579 | { | |
e227ceac | 2580 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2581 | lq_sta->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 2582 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2583 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2584 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2585 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2586 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2587 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2588 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2589 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2590 | |
93dc646a ZY |
2591 | } |
2592 | ||
2593 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2594 | { | |
e227ceac | 2595 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2596 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2597 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2598 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2599 | } |
2600 | #endif | |
2601 | ||
b481de9c ZY |
2602 | static struct rate_control_ops rs_ops = { |
2603 | .module = NULL, | |
2604 | .name = RS_NAME, | |
2605 | .tx_status = rs_tx_status, | |
2606 | .get_rate = rs_get_rate, | |
2607 | .rate_init = rs_rate_init, | |
2608 | .clear = rs_clear, | |
2609 | .alloc = rs_alloc, | |
2610 | .free = rs_free, | |
2611 | .alloc_sta = rs_alloc_sta, | |
2612 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2613 | #ifdef CONFIG_MAC80211_DEBUGFS |
2614 | .add_sta_debugfs = rs_add_debugfs, | |
2615 | .remove_sta_debugfs = rs_remove_debugfs, | |
2616 | #endif | |
b481de9c ZY |
2617 | }; |
2618 | ||
e227ceac | 2619 | int iwlagn_rate_control_register(void) |
b481de9c | 2620 | { |
897e1cf2 | 2621 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2622 | } |
2623 | ||
e227ceac | 2624 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
2625 | { |
2626 | ieee80211_rate_control_unregister(&rs_ops); | |
2627 | } | |
2628 |