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1 | /****************************************************************************** |
2 | * | |
3 | * Copyright(c) 2005 - 2007 Intel Corporation. All rights reserved. | |
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> | |
31 | #include <net/ieee80211.h> | |
32 | ||
33 | #include <linux/netdevice.h> | |
34 | #include <linux/etherdevice.h> | |
35 | #include <linux/delay.h> | |
36 | ||
37 | #include <linux/workqueue.h> | |
38 | ||
39 | #include <net/mac80211.h> | |
40 | #include <linux/wireless.h> | |
41 | ||
42 | #include "../net/mac80211/ieee80211_rate.h" | |
43 | ||
44 | #include "iwlwifi.h" | |
45 | #include "iwl-helpers.h" | |
46 | ||
47 | #define RS_NAME "iwl-4965-rs" | |
48 | ||
49 | #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1 | |
50 | #define IWL_NUMBER_TRY 1 | |
51 | #define IWL_HT_NUMBER_TRY 3 | |
52 | ||
53 | #define IWL_RATE_MAX_WINDOW 62 | |
54 | #define IWL_RATE_HIGH_TH 10880 | |
55 | #define IWL_RATE_MIN_FAILURE_TH 6 | |
56 | #define IWL_RATE_MIN_SUCCESS_TH 8 | |
57 | #define IWL_RATE_DECREASE_TH 1920 | |
58 | #define IWL_RATE_INCREASE_TH 8960 | |
59 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) /*2 seconds */ | |
60 | ||
61 | static u8 rs_ht_to_legacy[] = { | |
62 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
63 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
64 | IWL_RATE_6M_INDEX, | |
65 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
66 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
67 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
68 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
69 | }; | |
70 | ||
71 | struct iwl_rate { | |
72 | u32 rate_n_flags; | |
73 | } __attribute__ ((packed)); | |
74 | ||
75 | struct iwl_rate_scale_data { | |
76 | u64 data; | |
77 | s32 success_counter; | |
78 | s32 success_ratio; | |
79 | s32 counter; | |
80 | s32 average_tpt; | |
81 | unsigned long stamp; | |
82 | }; | |
83 | ||
84 | struct iwl_scale_tbl_info { | |
85 | enum iwl_table_type lq_type; | |
86 | enum iwl_antenna_type antenna_type; | |
87 | u8 is_SGI; | |
88 | u8 is_fat; | |
89 | u8 is_dup; | |
90 | u8 action; | |
91 | s32 *expected_tpt; | |
92 | struct iwl_rate current_rate; | |
93 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; | |
94 | }; | |
95 | ||
96 | struct iwl_rate_scale_priv { | |
97 | u8 active_tbl; | |
98 | u8 enable_counter; | |
99 | u8 stay_in_tbl; | |
100 | u8 search_better_tbl; | |
101 | s32 last_tpt; | |
102 | u32 table_count_limit; | |
103 | u32 max_failure_limit; | |
104 | u32 max_success_limit; | |
105 | u32 table_count; | |
106 | u32 total_failed; | |
107 | u32 total_success; | |
108 | u32 flush_timer; | |
109 | u8 action_counter; | |
110 | u8 antenna; | |
111 | u8 valid_antenna; | |
112 | u8 is_green; | |
113 | u8 is_dup; | |
114 | u8 phymode; | |
115 | u8 ibss_sta_added; | |
116 | u16 active_rate; | |
117 | u16 active_siso_rate; | |
118 | u16 active_mimo_rate; | |
119 | u16 active_rate_basic; | |
120 | struct iwl_link_quality_cmd lq; | |
121 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; | |
122 | }; | |
123 | ||
124 | static void rs_rate_scale_perform(struct iwl_priv *priv, | |
125 | struct net_device *dev, | |
126 | struct ieee80211_hdr *hdr, | |
127 | struct sta_info *sta); | |
128 | static int rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, | |
129 | struct iwl_rate *tx_mcs, | |
130 | struct iwl_link_quality_cmd *tbl, | |
131 | struct sta_info *sta); | |
132 | ||
133 | ||
134 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { | |
135 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
136 | }; | |
137 | ||
138 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
139 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
140 | }; | |
141 | ||
142 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
143 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
144 | }; | |
145 | ||
146 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
147 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
148 | }; | |
149 | ||
150 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
151 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
152 | }; | |
153 | ||
154 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
155 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
156 | }; | |
157 | ||
158 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
159 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
160 | }; | |
161 | ||
162 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
163 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
164 | }; | |
165 | ||
166 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
167 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
168 | }; | |
169 | ||
170 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
171 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
172 | }; | |
173 | ||
174 | static int iwl_lq_sync_callback(struct iwl_priv *priv, | |
175 | struct iwl_cmd *cmd, struct sk_buff *skb) | |
176 | { | |
177 | /*We didn't cache the SKB; let the caller free it */ | |
178 | return 1; | |
179 | } | |
180 | ||
181 | static inline u8 iwl_rate_get_rate(u32 rate_n_flags) | |
182 | { | |
183 | return (u8)(rate_n_flags & 0xFF); | |
184 | } | |
185 | ||
186 | static int rs_send_lq_cmd(struct iwl_priv *priv, | |
187 | struct iwl_link_quality_cmd *lq, u8 flags) | |
188 | { | |
189 | #ifdef CONFIG_IWLWIFI_DEBUG | |
190 | int i; | |
191 | #endif | |
192 | int rc = -1; | |
193 | ||
194 | struct iwl_host_cmd cmd = { | |
195 | .id = REPLY_TX_LINK_QUALITY_CMD, | |
196 | .len = sizeof(struct iwl_link_quality_cmd), | |
197 | .meta.flags = flags, | |
198 | .data = lq, | |
199 | }; | |
200 | ||
201 | if ((lq->sta_id == 0xFF) && | |
202 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
203 | return rc; | |
204 | ||
205 | if (lq->sta_id == 0xFF) | |
206 | lq->sta_id = IWL_AP_ID; | |
207 | ||
208 | IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id); | |
209 | IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n", | |
210 | lq->general_params.single_stream_ant_msk, | |
211 | lq->general_params.dual_stream_ant_msk); | |
212 | #ifdef CONFIG_IWLWIFI_DEBUG | |
213 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
214 | IWL_DEBUG_RATE("lq index %d 0x%X\n", | |
215 | i, lq->rs_table[i].rate_n_flags); | |
216 | #endif | |
217 | ||
218 | if (flags & CMD_ASYNC) | |
219 | cmd.meta.u.callback = iwl_lq_sync_callback; | |
220 | ||
221 | if (iwl_is_associated(priv) && priv->assoc_station_added && | |
222 | priv->lq_mngr.lq_ready) | |
223 | rc = iwl_send_cmd(priv, &cmd); | |
224 | ||
225 | return rc; | |
226 | } | |
227 | ||
228 | static int rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) | |
229 | { | |
230 | window->data = 0; | |
231 | window->success_counter = 0; | |
232 | window->success_ratio = IWL_INVALID_VALUE; | |
233 | window->counter = 0; | |
234 | window->average_tpt = IWL_INVALID_VALUE; | |
235 | window->stamp = 0; | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, | |
241 | int scale_index, s32 tpt, u32 status) | |
242 | { | |
243 | int rc = 0; | |
244 | struct iwl_rate_scale_data *window = NULL; | |
245 | u64 mask; | |
246 | u8 win_size = IWL_RATE_MAX_WINDOW; | |
247 | s32 fail_count; | |
248 | ||
249 | if (scale_index < 0) | |
250 | return -1; | |
251 | ||
252 | if (scale_index >= IWL_RATE_COUNT) | |
253 | return -1; | |
254 | ||
255 | window = &(windows[scale_index]); | |
256 | ||
257 | if (window->counter >= win_size) { | |
258 | ||
259 | window->counter = win_size - 1; | |
260 | mask = 1; | |
261 | mask = (mask << (win_size - 1)); | |
262 | if ((window->data & mask)) { | |
263 | window->data &= ~mask; | |
264 | window->success_counter = window->success_counter - 1; | |
265 | } | |
266 | } | |
267 | ||
268 | window->counter = window->counter + 1; | |
269 | mask = window->data; | |
270 | window->data = (mask << 1); | |
271 | if (status != 0) { | |
272 | window->success_counter = window->success_counter + 1; | |
273 | window->data |= 0x1; | |
274 | } | |
275 | ||
276 | if (window->counter > 0) | |
277 | window->success_ratio = 128 * (100 * window->success_counter) | |
278 | / window->counter; | |
279 | else | |
280 | window->success_ratio = IWL_INVALID_VALUE; | |
281 | ||
282 | fail_count = window->counter - window->success_counter; | |
283 | ||
284 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || | |
285 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
286 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
287 | else | |
288 | window->average_tpt = IWL_INVALID_VALUE; | |
289 | ||
290 | window->stamp = jiffies; | |
291 | ||
292 | return rc; | |
293 | } | |
294 | ||
295 | int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, | |
296 | struct iwl_scale_tbl_info *tbl, | |
297 | int index, u8 use_green) | |
298 | { | |
299 | int rc = 0; | |
300 | ||
301 | if (is_legacy(tbl->lq_type)) { | |
302 | mcs_rate->rate_n_flags = iwl_rates[index].plcp; | |
303 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) | |
304 | mcs_rate->rate_n_flags |= RATE_MCS_CCK_MSK; | |
305 | ||
306 | } else if (is_siso(tbl->lq_type)) { | |
307 | if (index > IWL_LAST_OFDM_RATE) | |
308 | index = IWL_LAST_OFDM_RATE; | |
309 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_siso | | |
310 | RATE_MCS_HT_MSK; | |
311 | } else { | |
312 | if (index > IWL_LAST_OFDM_RATE) | |
313 | index = IWL_LAST_OFDM_RATE; | |
314 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_mimo | | |
315 | RATE_MCS_HT_MSK; | |
316 | } | |
317 | ||
318 | switch (tbl->antenna_type) { | |
319 | case ANT_BOTH: | |
320 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_AB_MSK; | |
321 | break; | |
322 | case ANT_MAIN: | |
323 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
324 | break; | |
325 | case ANT_AUX: | |
326 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
327 | break; | |
328 | case ANT_NONE: | |
329 | break; | |
330 | } | |
331 | ||
332 | if (is_legacy(tbl->lq_type)) | |
333 | return rc; | |
334 | ||
335 | if (tbl->is_fat) { | |
336 | if (tbl->is_dup) | |
337 | mcs_rate->rate_n_flags |= RATE_MCS_DUP_MSK; | |
338 | else | |
339 | mcs_rate->rate_n_flags |= RATE_MCS_FAT_MSK; | |
340 | } | |
341 | if (tbl->is_SGI) | |
342 | mcs_rate->rate_n_flags |= RATE_MCS_SGI_MSK; | |
343 | ||
344 | if (use_green) { | |
345 | mcs_rate->rate_n_flags |= RATE_MCS_GF_MSK; | |
346 | if (is_siso(tbl->lq_type)) | |
347 | mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
348 | } | |
349 | return rc; | |
350 | } | |
351 | ||
352 | static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, | |
353 | int phymode, struct iwl_scale_tbl_info *tbl, | |
354 | int *rate_idx) | |
355 | { | |
356 | int index; | |
357 | u32 ant_msk; | |
358 | ||
359 | index = iwl_rate_index_from_plcp(mcs_rate->rate_n_flags); | |
360 | ||
361 | if (index == IWL_RATE_INVALID) { | |
362 | *rate_idx = -1; | |
363 | return -1; | |
364 | } | |
365 | tbl->is_SGI = 0; | |
366 | tbl->is_fat = 0; | |
367 | tbl->is_dup = 0; | |
368 | tbl->antenna_type = ANT_BOTH; | |
369 | ||
370 | if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { | |
371 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
372 | ||
373 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
374 | tbl->lq_type = LQ_NONE; | |
375 | else { | |
376 | ||
377 | if (phymode == MODE_IEEE80211A) | |
378 | tbl->lq_type = LQ_A; | |
379 | else | |
380 | tbl->lq_type = LQ_G; | |
381 | ||
382 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
383 | tbl->antenna_type = ANT_MAIN; | |
384 | else | |
385 | tbl->antenna_type = ANT_AUX; | |
386 | } | |
387 | *rate_idx = index; | |
388 | ||
389 | } else if (iwl_rate_get_rate(mcs_rate->rate_n_flags) | |
390 | <= IWL_RATE_SISO_60M_PLCP) { | |
391 | tbl->lq_type = LQ_SISO; | |
392 | ||
393 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
394 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
395 | tbl->lq_type = LQ_NONE; | |
396 | else { | |
397 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
398 | tbl->antenna_type = ANT_MAIN; | |
399 | else | |
400 | tbl->antenna_type = ANT_AUX; | |
401 | } | |
402 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
403 | tbl->is_SGI = 1; | |
404 | ||
405 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
406 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
407 | tbl->is_fat = 1; | |
408 | ||
409 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
410 | tbl->is_dup = 1; | |
411 | ||
412 | *rate_idx = index; | |
413 | } else { | |
414 | tbl->lq_type = LQ_MIMO; | |
415 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
416 | tbl->is_SGI = 1; | |
417 | ||
418 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
419 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
420 | tbl->is_fat = 1; | |
421 | ||
422 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
423 | tbl->is_dup = 1; | |
424 | *rate_idx = index; | |
425 | } | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static inline void rs_toggle_antenna(struct iwl_rate *new_rate, | |
430 | struct iwl_scale_tbl_info *tbl) | |
431 | { | |
432 | if (tbl->antenna_type == ANT_AUX) { | |
433 | tbl->antenna_type = ANT_MAIN; | |
434 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_B_MSK; | |
435 | new_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
436 | } else { | |
437 | tbl->antenna_type = ANT_AUX; | |
438 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
439 | new_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
440 | } | |
441 | } | |
442 | ||
443 | static inline s8 rs_use_green(struct iwl_priv *priv) | |
444 | { | |
445 | s8 rc = 0; | |
446 | #ifdef CONFIG_IWLWIFI_HT | |
447 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
448 | return 0; | |
449 | ||
450 | if ((priv->current_assoc_ht.is_green_field) && | |
451 | !(priv->current_assoc_ht.operating_mode & 0x4)) | |
452 | rc = 1; | |
453 | #endif /*CONFIG_IWLWIFI_HT */ | |
454 | return rc; | |
455 | } | |
456 | ||
457 | /** | |
458 | * rs_get_supported_rates - get the available rates | |
459 | * | |
460 | * if management frame or broadcast frame only return | |
461 | * basic available rates. | |
462 | * | |
463 | */ | |
464 | static void rs_get_supported_rates(struct iwl_rate_scale_priv *lq_data, | |
465 | struct ieee80211_hdr *hdr, | |
466 | enum iwl_table_type rate_type, | |
467 | u16 *data_rate) | |
468 | { | |
469 | if (is_legacy(rate_type)) | |
470 | *data_rate = lq_data->active_rate; | |
471 | else { | |
472 | if (is_siso(rate_type)) | |
473 | *data_rate = lq_data->active_siso_rate; | |
474 | else | |
475 | *data_rate = lq_data->active_mimo_rate; | |
476 | } | |
477 | ||
478 | if (hdr && is_multicast_ether_addr(hdr->addr1) && | |
479 | lq_data->active_rate_basic) | |
480 | *data_rate = lq_data->active_rate_basic; | |
481 | } | |
482 | ||
483 | static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) | |
484 | { | |
485 | u8 high = IWL_RATE_INVALID; | |
486 | u8 low = IWL_RATE_INVALID; | |
487 | ||
488 | /* 802.11A or ht walks to the next literal adjascent rate in | |
489 | * the rate table */ | |
490 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
491 | int i; | |
492 | u32 mask; | |
493 | ||
494 | /* Find the previous rate that is in the rate mask */ | |
495 | i = index - 1; | |
496 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
497 | if (rate_mask & mask) { | |
498 | low = i; | |
499 | break; | |
500 | } | |
501 | } | |
502 | ||
503 | /* Find the next rate that is in the rate mask */ | |
504 | i = index + 1; | |
505 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
506 | if (rate_mask & mask) { | |
507 | high = i; | |
508 | break; | |
509 | } | |
510 | } | |
511 | ||
512 | return (high << 8) | low; | |
513 | } | |
514 | ||
515 | low = index; | |
516 | while (low != IWL_RATE_INVALID) { | |
517 | low = iwl_rates[low].prev_rs; | |
518 | if (low == IWL_RATE_INVALID) | |
519 | break; | |
520 | if (rate_mask & (1 << low)) | |
521 | break; | |
522 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
523 | } | |
524 | ||
525 | high = index; | |
526 | while (high != IWL_RATE_INVALID) { | |
527 | high = iwl_rates[high].next_rs; | |
528 | if (high == IWL_RATE_INVALID) | |
529 | break; | |
530 | if (rate_mask & (1 << high)) | |
531 | break; | |
532 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
533 | } | |
534 | ||
535 | return (high << 8) | low; | |
536 | } | |
537 | ||
538 | static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, | |
539 | struct iwl_scale_tbl_info *tbl, u8 scale_index, | |
540 | u8 ht_possible, struct iwl_rate *mcs_rate, | |
541 | struct sta_info *sta) | |
542 | { | |
543 | u8 is_green = lq_data->is_green; | |
544 | s32 low; | |
545 | u16 rate_mask; | |
546 | u16 high_low; | |
547 | u8 switch_to_legacy = 0; | |
548 | ||
549 | /* check if we need to switch from HT to legacy rates. | |
550 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
551 | * are always supported (spec demand) */ | |
552 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
553 | switch_to_legacy = 1; | |
554 | scale_index = rs_ht_to_legacy[scale_index]; | |
555 | if (lq_data->phymode == MODE_IEEE80211A) | |
556 | tbl->lq_type = LQ_A; | |
557 | else | |
558 | tbl->lq_type = LQ_G; | |
559 | ||
560 | if ((tbl->antenna_type == ANT_BOTH) || | |
561 | (tbl->antenna_type == ANT_NONE)) | |
562 | tbl->antenna_type = ANT_MAIN; | |
563 | ||
564 | tbl->is_fat = 0; | |
565 | tbl->is_SGI = 0; | |
566 | } | |
567 | ||
568 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, &rate_mask); | |
569 | ||
570 | /* mask with station rate restriction */ | |
571 | if (is_legacy(tbl->lq_type)) { | |
572 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
573 | rate_mask = (u16)(rate_mask & | |
574 | (sta->supp_rates << IWL_FIRST_OFDM_RATE)); | |
575 | else | |
576 | rate_mask = (u16)(rate_mask & sta->supp_rates); | |
577 | } | |
578 | ||
579 | /* if we did switched from HT to legacy check current rate */ | |
580 | if ((switch_to_legacy) && | |
581 | (rate_mask & (1 << scale_index))) { | |
582 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
583 | return 0; | |
584 | } | |
585 | ||
586 | high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); | |
587 | low = high_low & 0xff; | |
588 | ||
589 | if (low != IWL_RATE_INVALID) | |
590 | rs_mcs_from_tbl(mcs_rate, tbl, low, is_green); | |
591 | else | |
592 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | static void rs_tx_status(void *priv_rate, | |
598 | struct net_device *dev, | |
599 | struct sk_buff *skb, | |
600 | struct ieee80211_tx_status *tx_resp) | |
601 | { | |
602 | int status; | |
603 | u8 retries; | |
604 | int rs_index, index = 0; | |
605 | struct iwl_rate_scale_priv *lq; | |
606 | struct iwl_link_quality_cmd *table; | |
607 | struct sta_info *sta; | |
608 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
609 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
610 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
611 | struct iwl_rate_scale_data *window = NULL; | |
612 | struct iwl_rate_scale_data *search_win = NULL; | |
613 | struct iwl_rate tx_mcs; | |
614 | struct iwl_scale_tbl_info tbl_type; | |
615 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
616 | u8 active_index = 0; | |
617 | u16 fc = le16_to_cpu(hdr->frame_control); | |
618 | s32 tpt = 0; | |
619 | ||
620 | IWL_DEBUG_RATE("get frame ack response, update rate scale window\n"); | |
621 | ||
622 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
623 | return; | |
624 | ||
625 | retries = tx_resp->retry_count; | |
626 | ||
627 | if (retries > 15) | |
628 | retries = 15; | |
629 | ||
630 | ||
631 | sta = sta_info_get(local, hdr->addr1); | |
632 | ||
633 | if (!sta || !sta->rate_ctrl_priv) { | |
634 | if (sta) | |
635 | sta_info_put(sta); | |
636 | return; | |
637 | } | |
638 | ||
639 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
640 | ||
641 | if (!priv->lq_mngr.lq_ready) | |
642 | return; | |
643 | ||
644 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) | |
645 | return; | |
646 | ||
647 | table = &lq->lq; | |
648 | active_index = lq->active_tbl; | |
649 | ||
650 | lq->antenna = (lq->valid_antenna & local->hw.conf.antenna_sel_tx); | |
651 | if (!lq->antenna) | |
652 | lq->antenna = lq->valid_antenna; | |
653 | ||
654 | lq->antenna = lq->valid_antenna; | |
655 | curr_tbl = &(lq->lq_info[active_index]); | |
656 | search_tbl = &(lq->lq_info[(1 - active_index)]); | |
657 | window = (struct iwl_rate_scale_data *) | |
658 | &(curr_tbl->win[0]); | |
659 | search_win = (struct iwl_rate_scale_data *) | |
660 | &(search_tbl->win[0]); | |
661 | ||
662 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
663 | ||
664 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
665 | &tbl_type, &rs_index); | |
666 | if ((rs_index < 0) || (rs_index >= IWL_RATE_COUNT)) { | |
667 | IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n", | |
668 | rs_index, tx_mcs.rate_n_flags); | |
669 | sta_info_put(sta); | |
670 | return; | |
671 | } | |
672 | ||
673 | if (retries && | |
674 | (tx_mcs.rate_n_flags != | |
675 | le32_to_cpu(table->rs_table[0].rate_n_flags))) { | |
676 | IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n", | |
677 | tx_mcs.rate_n_flags, | |
678 | le32_to_cpu(table->rs_table[0].rate_n_flags)); | |
679 | sta_info_put(sta); | |
680 | return; | |
681 | } | |
682 | ||
683 | while (retries) { | |
684 | tx_mcs.rate_n_flags = | |
685 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
686 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
687 | &tbl_type, &rs_index); | |
688 | ||
689 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
690 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
691 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
692 | if (search_tbl->expected_tpt) | |
693 | tpt = search_tbl->expected_tpt[rs_index]; | |
694 | else | |
695 | tpt = 0; | |
696 | rs_collect_tx_data(search_win, | |
697 | rs_index, tpt, 0); | |
698 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
699 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
700 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
701 | if (curr_tbl->expected_tpt) | |
702 | tpt = curr_tbl->expected_tpt[rs_index]; | |
703 | else | |
704 | tpt = 0; | |
705 | rs_collect_tx_data(window, rs_index, tpt, 0); | |
706 | } | |
707 | if (lq->stay_in_tbl) | |
708 | lq->total_failed++; | |
709 | --retries; | |
710 | index++; | |
711 | ||
712 | } | |
713 | ||
714 | if (!tx_resp->retry_count) | |
715 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
716 | else | |
717 | tx_mcs.rate_n_flags = | |
718 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
719 | ||
720 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
721 | &tbl_type, &rs_index); | |
722 | ||
723 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) | |
724 | status = 1; | |
725 | else | |
726 | status = 0; | |
727 | ||
728 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
729 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
730 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
731 | if (search_tbl->expected_tpt) | |
732 | tpt = search_tbl->expected_tpt[rs_index]; | |
733 | else | |
734 | tpt = 0; | |
735 | rs_collect_tx_data(search_win, | |
736 | rs_index, tpt, status); | |
737 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
738 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
739 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
740 | if (curr_tbl->expected_tpt) | |
741 | tpt = curr_tbl->expected_tpt[rs_index]; | |
742 | else | |
743 | tpt = 0; | |
744 | rs_collect_tx_data(window, rs_index, tpt, status); | |
745 | } | |
746 | ||
747 | if (lq->stay_in_tbl) { | |
748 | if (status) | |
749 | lq->total_success++; | |
750 | else | |
751 | lq->total_failed++; | |
752 | } | |
753 | ||
754 | rs_rate_scale_perform(priv, dev, hdr, sta); | |
755 | sta_info_put(sta); | |
756 | return; | |
757 | } | |
758 | ||
759 | static u8 rs_is_ant_connected(u8 valid_antenna, | |
760 | enum iwl_antenna_type antenna_type) | |
761 | { | |
762 | if (antenna_type == ANT_AUX) | |
763 | return ((valid_antenna & 0x2) ? 1:0); | |
764 | else if (antenna_type == ANT_MAIN) | |
765 | return ((valid_antenna & 0x1) ? 1:0); | |
766 | else if (antenna_type == ANT_BOTH) { | |
767 | if ((valid_antenna & 0x3) == 0x3) | |
768 | return 1; | |
769 | else | |
770 | return 0; | |
771 | } | |
772 | ||
773 | return 1; | |
774 | } | |
775 | ||
776 | static u8 rs_is_other_ant_connected(u8 valid_antenna, | |
777 | enum iwl_antenna_type antenna_type) | |
778 | { | |
779 | if (antenna_type == ANT_AUX) | |
780 | return (rs_is_ant_connected(valid_antenna, ANT_MAIN)); | |
781 | else | |
782 | return (rs_is_ant_connected(valid_antenna, ANT_AUX)); | |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
787 | static void rs_set_stay_in_table(u8 is_legacy, | |
788 | struct iwl_rate_scale_priv *lq_data) | |
789 | { | |
790 | IWL_DEBUG_HT("we are staying in the same table\n"); | |
791 | lq_data->stay_in_tbl = 1; | |
792 | if (is_legacy) { | |
793 | lq_data->table_count_limit = IWL_LEGACY_TABLE_COUNT; | |
794 | lq_data->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
795 | lq_data->max_success_limit = IWL_LEGACY_TABLE_COUNT; | |
796 | } else { | |
797 | lq_data->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; | |
798 | lq_data->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
799 | lq_data->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
800 | } | |
801 | lq_data->table_count = 0; | |
802 | lq_data->total_failed = 0; | |
803 | lq_data->total_success = 0; | |
804 | } | |
805 | ||
806 | static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, | |
807 | struct iwl_scale_tbl_info *tbl) | |
808 | { | |
809 | if (is_legacy(tbl->lq_type)) { | |
810 | if (!is_a_band(tbl->lq_type)) | |
811 | tbl->expected_tpt = expected_tpt_G; | |
812 | else | |
813 | tbl->expected_tpt = expected_tpt_A; | |
814 | } else if (is_siso(tbl->lq_type)) { | |
815 | if (tbl->is_fat && !lq_data->is_dup) | |
816 | if (tbl->is_SGI) | |
817 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
818 | else | |
819 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
820 | else if (tbl->is_SGI) | |
821 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
822 | else | |
823 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
824 | ||
825 | } else if (is_mimo(tbl->lq_type)) { | |
826 | if (tbl->is_fat && !lq_data->is_dup) | |
827 | if (tbl->is_SGI) | |
828 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
829 | else | |
830 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
831 | else if (tbl->is_SGI) | |
832 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
833 | else | |
834 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
835 | } else | |
836 | tbl->expected_tpt = expected_tpt_G; | |
837 | } | |
838 | ||
839 | #ifdef CONFIG_IWLWIFI_HT | |
840 | static s32 rs_get_best_rate(struct iwl_priv *priv, | |
841 | struct iwl_rate_scale_priv *lq_data, | |
842 | struct iwl_scale_tbl_info *tbl, | |
843 | u16 rate_mask, s8 index, s8 rate) | |
844 | { | |
845 | struct iwl_scale_tbl_info *active_tbl = | |
846 | &(lq_data->lq_info[lq_data->active_tbl]); | |
847 | s32 new_rate, high, low, start_hi; | |
848 | s32 active_sr = active_tbl->win[index].success_ratio; | |
849 | s32 *tpt_tbl = tbl->expected_tpt; | |
850 | s32 active_tpt = active_tbl->expected_tpt[index]; | |
851 | u16 high_low; | |
852 | ||
853 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
854 | ||
855 | for (; ;) { | |
856 | high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); | |
857 | ||
858 | low = high_low & 0xff; | |
859 | high = (high_low >> 8) & 0xff; | |
860 | ||
861 | if ((((100 * tpt_tbl[rate]) > lq_data->last_tpt) && | |
862 | ((active_sr > IWL_RATE_DECREASE_TH) && | |
863 | (active_sr <= IWL_RATE_HIGH_TH) && | |
864 | (tpt_tbl[rate] <= active_tpt))) || | |
865 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
866 | (tpt_tbl[rate] > active_tpt))) { | |
867 | ||
868 | if (start_hi != IWL_RATE_INVALID) { | |
869 | new_rate = start_hi; | |
870 | break; | |
871 | } | |
872 | new_rate = rate; | |
873 | if (low != IWL_RATE_INVALID) | |
874 | rate = low; | |
875 | else | |
876 | break; | |
877 | } else { | |
878 | if (new_rate != IWL_RATE_INVALID) | |
879 | break; | |
880 | else if (high != IWL_RATE_INVALID) { | |
881 | start_hi = high; | |
882 | rate = high; | |
883 | } else { | |
884 | new_rate = rate; | |
885 | break; | |
886 | } | |
887 | } | |
888 | } | |
889 | ||
890 | return new_rate; | |
891 | } | |
892 | #endif /* CONFIG_IWLWIFI_HT */ | |
893 | ||
894 | static inline u8 rs_is_both_ant_supp(u8 valid_antenna) | |
895 | { | |
896 | return (rs_is_ant_connected(valid_antenna, ANT_BOTH)); | |
897 | } | |
898 | ||
899 | static int rs_switch_to_mimo(struct iwl_priv *priv, | |
900 | struct iwl_rate_scale_priv *lq_data, | |
901 | struct iwl_scale_tbl_info *tbl, int index) | |
902 | { | |
903 | int rc = -1; | |
904 | #ifdef CONFIG_IWLWIFI_HT | |
905 | u16 rate_mask; | |
906 | s32 rate; | |
907 | s8 is_green = lq_data->is_green; | |
908 | ||
909 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
910 | return -1; | |
911 | ||
912 | IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); | |
913 | tbl->lq_type = LQ_MIMO; | |
914 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
915 | &rate_mask); | |
916 | ||
917 | if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) | |
918 | return -1; | |
919 | ||
920 | if (!rs_is_both_ant_supp(lq_data->antenna)) | |
921 | return -1; | |
922 | ||
923 | rc = 0; | |
924 | tbl->is_dup = lq_data->is_dup; | |
925 | tbl->action = 0; | |
926 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
927 | tbl->is_fat = 1; | |
928 | else | |
929 | tbl->is_fat = 0; | |
930 | ||
931 | if (tbl->is_fat) { | |
932 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
933 | tbl->is_SGI = 1; | |
934 | else | |
935 | tbl->is_SGI = 0; | |
936 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
937 | tbl->is_SGI = 1; | |
938 | else | |
939 | tbl->is_SGI = 0; | |
940 | ||
941 | rs_get_expected_tpt_table(lq_data, tbl); | |
942 | ||
943 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
944 | ||
945 | IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate, rate_mask); | |
946 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) | |
947 | return -1; | |
948 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
949 | ||
950 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
951 | tbl->current_rate.rate_n_flags, is_green); | |
952 | ||
953 | #endif /*CONFIG_IWLWIFI_HT */ | |
954 | return rc; | |
955 | } | |
956 | ||
957 | static int rs_switch_to_siso(struct iwl_priv *priv, | |
958 | struct iwl_rate_scale_priv *lq_data, | |
959 | struct iwl_scale_tbl_info *tbl, int index) | |
960 | { | |
961 | int rc = -1; | |
962 | #ifdef CONFIG_IWLWIFI_HT | |
963 | u16 rate_mask; | |
964 | u8 is_green = lq_data->is_green; | |
965 | s32 rate; | |
966 | ||
967 | IWL_DEBUG_HT("LQ: try to switch to SISO\n"); | |
968 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
969 | return -1; | |
970 | ||
971 | rc = 0; | |
972 | tbl->is_dup = lq_data->is_dup; | |
973 | tbl->lq_type = LQ_SISO; | |
974 | tbl->action = 0; | |
975 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
976 | &rate_mask); | |
977 | ||
978 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
979 | tbl->is_fat = 1; | |
980 | else | |
981 | tbl->is_fat = 0; | |
982 | ||
983 | if (tbl->is_fat) { | |
984 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
985 | tbl->is_SGI = 1; | |
986 | else | |
987 | tbl->is_SGI = 0; | |
988 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
989 | tbl->is_SGI = 1; | |
990 | else | |
991 | tbl->is_SGI = 0; | |
992 | ||
993 | if (is_green) | |
994 | tbl->is_SGI = 0; | |
995 | ||
996 | rs_get_expected_tpt_table(lq_data, tbl); | |
997 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
998 | ||
999 | IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask); | |
1000 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
1001 | IWL_DEBUG_HT("can not switch with index %d rate mask %x\n", | |
1002 | rate, rate_mask); | |
1003 | return -1; | |
1004 | } | |
1005 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
1006 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
1007 | tbl->current_rate.rate_n_flags, is_green); | |
1008 | ||
1009 | #endif /*CONFIG_IWLWIFI_HT */ | |
1010 | return rc; | |
1011 | } | |
1012 | ||
1013 | static int rs_move_legacy_other(struct iwl_priv *priv, | |
1014 | struct iwl_rate_scale_priv *lq_data, | |
1015 | int index) | |
1016 | { | |
1017 | int rc = 0; | |
1018 | struct iwl_scale_tbl_info *tbl = | |
1019 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1020 | struct iwl_scale_tbl_info *search_tbl = | |
1021 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1022 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1023 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1024 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1025 | u8 start_action = tbl->action; | |
1026 | ||
1027 | for (; ;) { | |
1028 | switch (tbl->action) { | |
1029 | case IWL_LEGACY_SWITCH_ANTENNA: | |
1030 | IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); | |
1031 | ||
1032 | search_tbl->lq_type = LQ_NONE; | |
1033 | lq_data->action_counter++; | |
1034 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1035 | break; | |
1036 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1037 | tbl->antenna_type)) | |
1038 | break; | |
1039 | ||
1040 | memcpy(search_tbl, tbl, sz); | |
1041 | ||
1042 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1043 | search_tbl); | |
1044 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1045 | lq_data->search_better_tbl = 1; | |
1046 | goto out; | |
1047 | ||
1048 | case IWL_LEGACY_SWITCH_SISO: | |
1049 | IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); | |
1050 | memcpy(search_tbl, tbl, sz); | |
1051 | search_tbl->lq_type = LQ_SISO; | |
1052 | search_tbl->is_SGI = 0; | |
1053 | search_tbl->is_fat = 0; | |
1054 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, | |
1055 | index); | |
1056 | if (!rc) { | |
1057 | lq_data->search_better_tbl = 1; | |
1058 | lq_data->action_counter = 0; | |
1059 | } | |
1060 | if (!rc) | |
1061 | goto out; | |
1062 | ||
1063 | break; | |
1064 | case IWL_LEGACY_SWITCH_MIMO: | |
1065 | IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); | |
1066 | memcpy(search_tbl, tbl, sz); | |
1067 | search_tbl->lq_type = LQ_MIMO; | |
1068 | search_tbl->is_SGI = 0; | |
1069 | search_tbl->is_fat = 0; | |
1070 | search_tbl->antenna_type = ANT_BOTH; | |
1071 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, | |
1072 | index); | |
1073 | if (!rc) { | |
1074 | lq_data->search_better_tbl = 1; | |
1075 | lq_data->action_counter = 0; | |
1076 | } | |
1077 | if (!rc) | |
1078 | goto out; | |
1079 | break; | |
1080 | } | |
1081 | tbl->action++; | |
1082 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1083 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1084 | ||
1085 | if (tbl->action == start_action) | |
1086 | break; | |
1087 | ||
1088 | } | |
1089 | return 0; | |
1090 | ||
1091 | out: | |
1092 | tbl->action++; | |
1093 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1094 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1095 | return 0; | |
1096 | ||
1097 | } | |
1098 | ||
1099 | static int rs_move_siso_to_other(struct iwl_priv *priv, | |
1100 | struct iwl_rate_scale_priv *lq_data, | |
1101 | int index) | |
1102 | { | |
1103 | int rc = -1; | |
1104 | u8 is_green = lq_data->is_green; | |
1105 | struct iwl_scale_tbl_info *tbl = | |
1106 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1107 | struct iwl_scale_tbl_info *search_tbl = | |
1108 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1109 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1110 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1111 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1112 | u8 start_action = tbl->action; | |
1113 | ||
1114 | for (;;) { | |
1115 | lq_data->action_counter++; | |
1116 | switch (tbl->action) { | |
1117 | case IWL_SISO_SWITCH_ANTENNA: | |
1118 | IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n"); | |
1119 | search_tbl->lq_type = LQ_NONE; | |
1120 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1121 | break; | |
1122 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1123 | tbl->antenna_type)) | |
1124 | break; | |
1125 | ||
1126 | memcpy(search_tbl, tbl, sz); | |
1127 | search_tbl->action = IWL_SISO_SWITCH_MIMO; | |
1128 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1129 | search_tbl); | |
1130 | lq_data->search_better_tbl = 1; | |
1131 | ||
1132 | goto out; | |
1133 | ||
1134 | case IWL_SISO_SWITCH_MIMO: | |
1135 | IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n"); | |
1136 | memcpy(search_tbl, tbl, sz); | |
1137 | search_tbl->lq_type = LQ_MIMO; | |
1138 | search_tbl->is_SGI = 0; | |
1139 | search_tbl->is_fat = 0; | |
1140 | search_tbl->antenna_type = ANT_BOTH; | |
1141 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, | |
1142 | index); | |
1143 | if (!rc) | |
1144 | lq_data->search_better_tbl = 1; | |
1145 | ||
1146 | if (!rc) | |
1147 | goto out; | |
1148 | break; | |
1149 | case IWL_SISO_SWITCH_GI: | |
1150 | IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); | |
1151 | memcpy(search_tbl, tbl, sz); | |
1152 | search_tbl->action = 0; | |
1153 | if (search_tbl->is_SGI) | |
1154 | search_tbl->is_SGI = 0; | |
1155 | else if (!is_green) | |
1156 | search_tbl->is_SGI = 1; | |
1157 | else | |
1158 | break; | |
1159 | lq_data->search_better_tbl = 1; | |
1160 | if ((tbl->lq_type == LQ_SISO) && | |
1161 | (tbl->is_SGI)) { | |
1162 | s32 tpt = lq_data->last_tpt / 100; | |
1163 | if (((!tbl->is_fat) && | |
1164 | (tpt >= expected_tpt_siso20MHz[index])) || | |
1165 | ((tbl->is_fat) && | |
1166 | (tpt >= expected_tpt_siso40MHz[index]))) | |
1167 | lq_data->search_better_tbl = 0; | |
1168 | } | |
1169 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1170 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1171 | search_tbl, index, is_green); | |
1172 | goto out; | |
1173 | } | |
1174 | tbl->action++; | |
1175 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1176 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1177 | ||
1178 | if (tbl->action == start_action) | |
1179 | break; | |
1180 | } | |
1181 | return 0; | |
1182 | ||
1183 | out: | |
1184 | tbl->action++; | |
1185 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1186 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | static int rs_move_mimo_to_other(struct iwl_priv *priv, | |
1191 | struct iwl_rate_scale_priv *lq_data, | |
1192 | int index) | |
1193 | { | |
1194 | int rc = -1; | |
1195 | s8 is_green = lq_data->is_green; | |
1196 | struct iwl_scale_tbl_info *tbl = | |
1197 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1198 | struct iwl_scale_tbl_info *search_tbl = | |
1199 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1200 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1201 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1202 | u8 start_action = tbl->action; | |
1203 | ||
1204 | for (;;) { | |
1205 | lq_data->action_counter++; | |
1206 | switch (tbl->action) { | |
1207 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1208 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
1209 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n"); | |
1210 | memcpy(search_tbl, tbl, sz); | |
1211 | search_tbl->lq_type = LQ_SISO; | |
1212 | search_tbl->is_SGI = 0; | |
1213 | search_tbl->is_fat = 0; | |
1214 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) | |
1215 | search_tbl->antenna_type = ANT_MAIN; | |
1216 | else | |
1217 | search_tbl->antenna_type = ANT_AUX; | |
1218 | ||
1219 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, | |
1220 | index); | |
1221 | if (!rc) { | |
1222 | lq_data->search_better_tbl = 1; | |
1223 | goto out; | |
1224 | } | |
1225 | break; | |
1226 | ||
1227 | case IWL_MIMO_SWITCH_GI: | |
1228 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); | |
1229 | memcpy(search_tbl, tbl, sz); | |
1230 | search_tbl->lq_type = LQ_MIMO; | |
1231 | search_tbl->antenna_type = ANT_BOTH; | |
1232 | search_tbl->action = 0; | |
1233 | if (search_tbl->is_SGI) | |
1234 | search_tbl->is_SGI = 0; | |
1235 | else | |
1236 | search_tbl->is_SGI = 1; | |
1237 | lq_data->search_better_tbl = 1; | |
1238 | if ((tbl->lq_type == LQ_MIMO) && | |
1239 | (tbl->is_SGI)) { | |
1240 | s32 tpt = lq_data->last_tpt / 100; | |
1241 | if (((!tbl->is_fat) && | |
1242 | (tpt >= expected_tpt_mimo20MHz[index])) || | |
1243 | ((tbl->is_fat) && | |
1244 | (tpt >= expected_tpt_mimo40MHz[index]))) | |
1245 | lq_data->search_better_tbl = 0; | |
1246 | } | |
1247 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1248 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1249 | search_tbl, index, is_green); | |
1250 | goto out; | |
1251 | ||
1252 | } | |
1253 | tbl->action++; | |
1254 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1255 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1256 | ||
1257 | if (tbl->action == start_action) | |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | return 0; | |
1262 | out: | |
1263 | tbl->action++; | |
1264 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1265 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1266 | return 0; | |
1267 | ||
1268 | } | |
1269 | ||
1270 | static void rs_stay_in_table(struct iwl_rate_scale_priv *lq_data) | |
1271 | { | |
1272 | struct iwl_scale_tbl_info *tbl; | |
1273 | int i; | |
1274 | int active_tbl; | |
1275 | int flush_interval_passed = 0; | |
1276 | ||
1277 | active_tbl = lq_data->active_tbl; | |
1278 | ||
1279 | tbl = &(lq_data->lq_info[active_tbl]); | |
1280 | ||
1281 | if (lq_data->stay_in_tbl) { | |
1282 | ||
1283 | if (lq_data->flush_timer) | |
1284 | flush_interval_passed = | |
1285 | time_after(jiffies, | |
1286 | (unsigned long)(lq_data->flush_timer + | |
1287 | IWL_RATE_SCALE_FLUSH_INTVL)); | |
1288 | ||
1289 | flush_interval_passed = 0; | |
1290 | if ((lq_data->total_failed > lq_data->max_failure_limit) || | |
1291 | (lq_data->total_success > lq_data->max_success_limit) || | |
1292 | ((!lq_data->search_better_tbl) && (lq_data->flush_timer) | |
1293 | && (flush_interval_passed))) { | |
1294 | IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:", | |
1295 | lq_data->total_failed, | |
1296 | lq_data->total_success, | |
1297 | flush_interval_passed); | |
1298 | lq_data->stay_in_tbl = 0; | |
1299 | lq_data->total_failed = 0; | |
1300 | lq_data->total_success = 0; | |
1301 | lq_data->flush_timer = 0; | |
1302 | } else if (lq_data->table_count > 0) { | |
1303 | lq_data->table_count++; | |
1304 | if (lq_data->table_count >= | |
1305 | lq_data->table_count_limit) { | |
1306 | lq_data->table_count = 0; | |
1307 | ||
1308 | IWL_DEBUG_HT("LQ: stay in table clear win\n"); | |
1309 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1310 | rs_rate_scale_clear_window( | |
1311 | &(tbl->win[i])); | |
1312 | } | |
1313 | } | |
1314 | ||
1315 | if (!lq_data->stay_in_tbl) { | |
1316 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1317 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1318 | } | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | static void rs_rate_scale_perform(struct iwl_priv *priv, | |
1323 | struct net_device *dev, | |
1324 | struct ieee80211_hdr *hdr, | |
1325 | struct sta_info *sta) | |
1326 | { | |
1327 | int low = IWL_RATE_INVALID; | |
1328 | int high = IWL_RATE_INVALID; | |
1329 | int index; | |
1330 | int i; | |
1331 | struct iwl_rate_scale_data *window = NULL; | |
1332 | int current_tpt = IWL_INVALID_VALUE; | |
1333 | int low_tpt = IWL_INVALID_VALUE; | |
1334 | int high_tpt = IWL_INVALID_VALUE; | |
1335 | u32 fail_count; | |
1336 | s8 scale_action = 0; | |
1337 | u16 fc, rate_mask; | |
1338 | u8 update_lq = 0; | |
1339 | struct iwl_rate_scale_priv *lq_data; | |
1340 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
1341 | u16 rate_scale_index_msk = 0; | |
1342 | struct iwl_rate mcs_rate; | |
1343 | u8 is_green = 0; | |
1344 | u8 active_tbl = 0; | |
1345 | u8 done_search = 0; | |
1346 | u16 high_low; | |
1347 | ||
1348 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1349 | ||
1350 | fc = le16_to_cpu(hdr->frame_control); | |
1351 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1352 | /* Send management frames and broadcast/multicast data using | |
1353 | * lowest rate. */ | |
1354 | /* TODO: this could probably be improved.. */ | |
1355 | return; | |
1356 | } | |
1357 | ||
1358 | if (!sta || !sta->rate_ctrl_priv) | |
1359 | return; | |
1360 | ||
1361 | if (!priv->lq_mngr.lq_ready) { | |
1362 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1363 | return; | |
1364 | } | |
1365 | lq_data = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1366 | ||
1367 | if (!lq_data->search_better_tbl) | |
1368 | active_tbl = lq_data->active_tbl; | |
1369 | else | |
1370 | active_tbl = 1 - lq_data->active_tbl; | |
1371 | ||
1372 | tbl = &(lq_data->lq_info[active_tbl]); | |
1373 | is_green = lq_data->is_green; | |
1374 | ||
1375 | index = sta->last_txrate; | |
1376 | ||
1377 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1378 | tbl->lq_type); | |
1379 | ||
1380 | rs_get_supported_rates(lq_data, hdr, tbl->lq_type, | |
1381 | &rate_mask); | |
1382 | ||
1383 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1384 | ||
1385 | /* mask with station rate restriction */ | |
1386 | if (is_legacy(tbl->lq_type)) { | |
1387 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1388 | rate_scale_index_msk = (u16) (rate_mask & | |
1389 | (sta->supp_rates << IWL_FIRST_OFDM_RATE)); | |
1390 | else | |
1391 | rate_scale_index_msk = (u16) (rate_mask & | |
1392 | sta->supp_rates); | |
1393 | ||
1394 | } else | |
1395 | rate_scale_index_msk = rate_mask; | |
1396 | ||
1397 | if (!rate_scale_index_msk) | |
1398 | rate_scale_index_msk = rate_mask; | |
1399 | ||
1400 | if (index < 0 || !((1 << index) & rate_scale_index_msk)) { | |
1401 | index = IWL_INVALID_VALUE; | |
1402 | update_lq = 1; | |
1403 | ||
1404 | /* get the lowest availabe rate */ | |
1405 | for (i = 0; i <= IWL_RATE_COUNT; i++) { | |
1406 | if ((1 << i) & rate_scale_index_msk) | |
1407 | index = i; | |
1408 | } | |
1409 | ||
1410 | if (index == IWL_INVALID_VALUE) { | |
1411 | IWL_WARNING("Can not find a suitable rate\n"); | |
1412 | return; | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | if (!tbl->expected_tpt) | |
1417 | rs_get_expected_tpt_table(lq_data, tbl); | |
1418 | ||
1419 | window = &(tbl->win[index]); | |
1420 | ||
1421 | fail_count = window->counter - window->success_counter; | |
1422 | if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && | |
1423 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) | |
1424 | || (tbl->expected_tpt == NULL)) { | |
1425 | IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " | |
1426 | "for index %d\n", | |
1427 | window->success_counter, window->counter, index); | |
1428 | window->average_tpt = IWL_INVALID_VALUE; | |
1429 | rs_stay_in_table(lq_data); | |
1430 | if (update_lq) { | |
1431 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
1432 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq, sta); | |
1433 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); | |
1434 | } | |
1435 | goto out; | |
1436 | ||
1437 | } else | |
1438 | window->average_tpt = ((window->success_ratio * | |
1439 | tbl->expected_tpt[index] + 64) / 128); | |
1440 | ||
1441 | if (lq_data->search_better_tbl) { | |
1442 | int success_limit = IWL_RATE_SCALE_SWITCH; | |
1443 | ||
1444 | if ((window->success_ratio > success_limit) || | |
1445 | (window->average_tpt > lq_data->last_tpt)) { | |
1446 | if (!is_legacy(tbl->lq_type)) { | |
1447 | IWL_DEBUG_HT("LQ: we are switching to HT" | |
1448 | " rate suc %d current tpt %d" | |
1449 | " old tpt %d\n", | |
1450 | window->success_ratio, | |
1451 | window->average_tpt, | |
1452 | lq_data->last_tpt); | |
1453 | lq_data->enable_counter = 1; | |
1454 | } | |
1455 | lq_data->active_tbl = active_tbl; | |
1456 | current_tpt = window->average_tpt; | |
1457 | } else { | |
1458 | tbl->lq_type = LQ_NONE; | |
1459 | active_tbl = lq_data->active_tbl; | |
1460 | tbl = &(lq_data->lq_info[active_tbl]); | |
1461 | ||
1462 | index = iwl_rate_index_from_plcp( | |
1463 | tbl->current_rate.rate_n_flags); | |
1464 | ||
1465 | update_lq = 1; | |
1466 | current_tpt = lq_data->last_tpt; | |
1467 | IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n"); | |
1468 | } | |
1469 | lq_data->search_better_tbl = 0; | |
1470 | done_search = 1; | |
1471 | goto lq_update; | |
1472 | } | |
1473 | ||
1474 | high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, | |
1475 | tbl->lq_type); | |
1476 | low = high_low & 0xff; | |
1477 | high = (high_low >> 8) & 0xff; | |
1478 | ||
1479 | current_tpt = window->average_tpt; | |
1480 | ||
1481 | if (low != IWL_RATE_INVALID) | |
1482 | low_tpt = tbl->win[low].average_tpt; | |
1483 | ||
1484 | if (high != IWL_RATE_INVALID) | |
1485 | high_tpt = tbl->win[high].average_tpt; | |
1486 | ||
1487 | ||
1488 | scale_action = 1; | |
1489 | ||
1490 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || | |
1491 | (current_tpt == 0)) { | |
1492 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); | |
1493 | scale_action = -1; | |
1494 | } else if ((low_tpt == IWL_INVALID_VALUE) && | |
1495 | (high_tpt == IWL_INVALID_VALUE)) | |
1496 | scale_action = 1; | |
1497 | else if ((low_tpt != IWL_INVALID_VALUE) && | |
1498 | (high_tpt != IWL_INVALID_VALUE) && | |
1499 | (low_tpt < current_tpt) && | |
1500 | (high_tpt < current_tpt)) | |
1501 | scale_action = 0; | |
1502 | else { | |
1503 | if (high_tpt != IWL_INVALID_VALUE) { | |
1504 | if (high_tpt > current_tpt) | |
1505 | scale_action = 1; | |
1506 | else { | |
1507 | IWL_DEBUG_RATE | |
1508 | ("decrease rate because of high tpt\n"); | |
1509 | scale_action = -1; | |
1510 | } | |
1511 | } else if (low_tpt != IWL_INVALID_VALUE) { | |
1512 | if (low_tpt > current_tpt) { | |
1513 | IWL_DEBUG_RATE | |
1514 | ("decrease rate because of low tpt\n"); | |
1515 | scale_action = -1; | |
1516 | } else | |
1517 | scale_action = 1; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | if (scale_action == -1) { | |
1522 | if ((low != IWL_RATE_INVALID) && | |
1523 | ((window->success_ratio > IWL_RATE_HIGH_TH) || | |
1524 | (current_tpt > (100 * tbl->expected_tpt[low])))) | |
1525 | scale_action = 0; | |
1526 | } else if ((scale_action == 1) && | |
1527 | (window->success_ratio < IWL_RATE_INCREASE_TH)) | |
1528 | scale_action = 0; | |
1529 | ||
1530 | switch (scale_action) { | |
1531 | case -1: | |
1532 | if (low != IWL_RATE_INVALID) { | |
1533 | update_lq = 1; | |
1534 | index = low; | |
1535 | } | |
1536 | break; | |
1537 | case 1: | |
1538 | if (high != IWL_RATE_INVALID) { | |
1539 | update_lq = 1; | |
1540 | index = high; | |
1541 | } | |
1542 | ||
1543 | break; | |
1544 | case 0: | |
1545 | default: | |
1546 | break; | |
1547 | } | |
1548 | ||
1549 | IWL_DEBUG_HT("choose rate scale index %d action %d low %d " | |
1550 | "high %d type %d\n", | |
1551 | index, scale_action, low, high, tbl->lq_type); | |
1552 | ||
1553 | lq_update: | |
1554 | if (update_lq) { | |
1555 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
1556 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq, sta); | |
1557 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); | |
1558 | } | |
1559 | rs_stay_in_table(lq_data); | |
1560 | ||
1561 | if (!update_lq && !done_search && !lq_data->stay_in_tbl) { | |
1562 | lq_data->last_tpt = current_tpt; | |
1563 | ||
1564 | if (is_legacy(tbl->lq_type)) | |
1565 | rs_move_legacy_other(priv, lq_data, index); | |
1566 | else if (is_siso(tbl->lq_type)) | |
1567 | rs_move_siso_to_other(priv, lq_data, index); | |
1568 | else | |
1569 | rs_move_mimo_to_other(priv, lq_data, index); | |
1570 | ||
1571 | if (lq_data->search_better_tbl) { | |
1572 | tbl = &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1573 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1574 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1575 | ||
1576 | index = iwl_rate_index_from_plcp( | |
1577 | tbl->current_rate.rate_n_flags); | |
1578 | ||
1579 | IWL_DEBUG_HT("Switch current mcs: %X index: %d\n", | |
1580 | tbl->current_rate.rate_n_flags, index); | |
1581 | rs_fill_link_cmd(lq_data, &tbl->current_rate, | |
1582 | &(lq_data->lq), sta); | |
1583 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); | |
1584 | } | |
1585 | tbl1 = &(lq_data->lq_info[lq_data->active_tbl]); | |
1586 | ||
1587 | if (is_legacy(tbl1->lq_type) && | |
1588 | #ifdef CONFIG_IWLWIFI_HT | |
1589 | !priv->current_assoc_ht.is_ht && | |
1590 | #endif | |
1591 | (lq_data->action_counter >= 1)) { | |
1592 | lq_data->action_counter = 0; | |
1593 | IWL_DEBUG_HT("LQ: STAY in legacy table\n"); | |
1594 | rs_set_stay_in_table(1, lq_data); | |
1595 | } | |
1596 | ||
1597 | if (lq_data->enable_counter && | |
1598 | (lq_data->action_counter >= IWL_ACTION_LIMIT)) { | |
1599 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
1600 | if ((lq_data->last_tpt > TID_AGG_TPT_THREHOLD) && | |
1601 | (priv->lq_mngr.agg_ctrl.auto_agg)) { | |
1602 | priv->lq_mngr.agg_ctrl.tid_retry = | |
1603 | TID_ALL_SPECIFIED; | |
1604 | schedule_work(&priv->agg_work); | |
1605 | } | |
1606 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
1607 | lq_data->action_counter = 0; | |
1608 | rs_set_stay_in_table(0, lq_data); | |
1609 | } | |
1610 | } else { | |
1611 | if ((!update_lq) && (!done_search) && (!lq_data->flush_timer)) | |
1612 | lq_data->flush_timer = jiffies; | |
1613 | } | |
1614 | ||
1615 | out: | |
1616 | rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green); | |
1617 | i = index; | |
1618 | sta->last_txrate = i; | |
1619 | ||
1620 | /* sta->txrate is an index to A mode rates which start | |
1621 | * at IWL_FIRST_OFDM_RATE | |
1622 | */ | |
1623 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1624 | sta->txrate = i - IWL_FIRST_OFDM_RATE; | |
1625 | else | |
1626 | sta->txrate = i; | |
1627 | ||
1628 | return; | |
1629 | } | |
1630 | ||
1631 | ||
1632 | static void rs_initialize_lq(struct iwl_priv *priv, | |
1633 | struct sta_info *sta) | |
1634 | { | |
1635 | int i; | |
1636 | struct iwl_rate_scale_priv *lq; | |
1637 | struct iwl_scale_tbl_info *tbl; | |
1638 | u8 active_tbl = 0; | |
1639 | int rate_idx; | |
1640 | u8 use_green = rs_use_green(priv); | |
1641 | struct iwl_rate mcs_rate; | |
1642 | ||
1643 | if (!sta || !sta->rate_ctrl_priv) | |
1644 | goto out; | |
1645 | ||
1646 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1647 | i = sta->last_txrate; | |
1648 | ||
1649 | if ((lq->lq.sta_id == 0xff) && | |
1650 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
1651 | goto out; | |
1652 | ||
1653 | if (!lq->search_better_tbl) | |
1654 | active_tbl = lq->active_tbl; | |
1655 | else | |
1656 | active_tbl = 1 - lq->active_tbl; | |
1657 | ||
1658 | tbl = &(lq->lq_info[active_tbl]); | |
1659 | ||
1660 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
1661 | i = 0; | |
1662 | ||
1663 | mcs_rate.rate_n_flags = iwl_rates[i].plcp ; | |
1664 | mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
1665 | mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
1666 | ||
1667 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
1668 | mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK; | |
1669 | ||
1670 | tbl->antenna_type = ANT_AUX; | |
1671 | rs_get_tbl_info_from_mcs(&mcs_rate, priv->phymode, tbl, &rate_idx); | |
1672 | if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type)) | |
1673 | rs_toggle_antenna(&mcs_rate, tbl), | |
1674 | ||
1675 | rs_mcs_from_tbl(&mcs_rate, tbl, rate_idx, use_green); | |
1676 | tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags; | |
1677 | rs_get_expected_tpt_table(lq, tbl); | |
1678 | rs_fill_link_cmd(lq, &mcs_rate, &(lq->lq), sta); | |
1679 | rs_send_lq_cmd(priv, &lq->lq, CMD_ASYNC); | |
1680 | out: | |
1681 | return; | |
1682 | } | |
1683 | ||
1684 | static struct ieee80211_rate *rs_get_lowest_rate(struct ieee80211_local | |
1685 | *local) | |
1686 | { | |
1687 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; | |
1688 | int i; | |
1689 | ||
1690 | for (i = 0; i < mode->num_rates; i++) { | |
1691 | struct ieee80211_rate *rate = &mode->rates[i]; | |
1692 | ||
1693 | if (rate->flags & IEEE80211_RATE_SUPPORTED) | |
1694 | return rate; | |
1695 | } | |
1696 | ||
1697 | return &mode->rates[0]; | |
1698 | } | |
1699 | ||
1700 | static struct ieee80211_rate *rs_get_rate(void *priv_rate, | |
1701 | struct net_device *dev, | |
1702 | struct sk_buff *skb, | |
1703 | struct rate_control_extra | |
1704 | *extra) | |
1705 | { | |
1706 | ||
1707 | int i; | |
1708 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1709 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1710 | struct sta_info *sta; | |
1711 | u16 fc; | |
1712 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
1713 | struct iwl_rate_scale_priv *lq; | |
1714 | ||
1715 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1716 | ||
1717 | memset(extra, 0, sizeof(*extra)); | |
1718 | ||
1719 | fc = le16_to_cpu(hdr->frame_control); | |
1720 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1721 | /* Send management frames and broadcast/multicast data using | |
1722 | * lowest rate. */ | |
1723 | /* TODO: this could probably be improved.. */ | |
1724 | return rs_get_lowest_rate(local); | |
1725 | } | |
1726 | ||
1727 | sta = sta_info_get(local, hdr->addr1); | |
1728 | ||
1729 | if (!sta || !sta->rate_ctrl_priv) { | |
1730 | if (sta) | |
1731 | sta_info_put(sta); | |
1732 | return rs_get_lowest_rate(local); | |
1733 | } | |
1734 | ||
1735 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1736 | i = sta->last_txrate; | |
1737 | ||
1738 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) { | |
1739 | u8 sta_id = iwl_hw_find_station(priv, hdr->addr1); | |
0795af57 | 1740 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
1741 | |
1742 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1743 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1744 | print_mac(mac, hdr->addr1)); | |
b481de9c ZY |
1745 | sta_id = iwl_add_station(priv, |
1746 | hdr->addr1, 0, CMD_ASYNC); | |
1747 | } | |
1748 | if ((sta_id != IWL_INVALID_STATION)) { | |
1749 | lq->lq.sta_id = sta_id; | |
1750 | lq->lq.rs_table[0].rate_n_flags = 0; | |
1751 | lq->ibss_sta_added = 1; | |
1752 | rs_initialize_lq(priv, sta); | |
1753 | } | |
1754 | if (!lq->ibss_sta_added) | |
1755 | goto done; | |
1756 | } | |
1757 | ||
1758 | done: | |
1759 | sta_info_put(sta); | |
1760 | if ((i < 0) || (i > IWL_RATE_COUNT)) | |
1761 | return rs_get_lowest_rate(local); | |
1762 | ||
1763 | return &priv->ieee_rates[i]; | |
1764 | } | |
1765 | ||
1766 | static void *rs_alloc_sta(void *priv, gfp_t gfp) | |
1767 | { | |
1768 | struct iwl_rate_scale_priv *crl; | |
1769 | int i, j; | |
1770 | ||
1771 | IWL_DEBUG_RATE("create station rate scale window\n"); | |
1772 | ||
1773 | crl = kzalloc(sizeof(struct iwl_rate_scale_priv), gfp); | |
1774 | ||
1775 | if (crl == NULL) | |
1776 | return NULL; | |
1777 | ||
1778 | memset(crl, 0, sizeof(struct iwl_rate_scale_priv)); | |
1779 | crl->lq.sta_id = 0xff; | |
1780 | ||
1781 | for (j = 0; j < LQ_SIZE; j++) | |
1782 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1783 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1784 | ||
1785 | return crl; | |
1786 | } | |
1787 | ||
1788 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
1789 | struct ieee80211_local *local, | |
1790 | struct sta_info *sta) | |
1791 | { | |
1792 | int i, j; | |
1793 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; | |
1794 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
1795 | struct iwl_rate_scale_priv *crl = priv_sta; | |
1796 | ||
1797 | memset(crl, 0, sizeof(struct iwl_rate_scale_priv)); | |
1798 | ||
1799 | crl->lq.sta_id = 0xff; | |
1800 | crl->flush_timer = 0; | |
1801 | sta->txrate = 3; | |
1802 | for (j = 0; j < LQ_SIZE; j++) | |
1803 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1804 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1805 | ||
1806 | IWL_DEBUG_RATE("rate scale global init\n"); | |
1807 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
1808 | * the lowest or the highest rate.. Could consider using RSSI from | |
1809 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
1810 | * after assoc.. */ | |
1811 | ||
1812 | crl->ibss_sta_added = 0; | |
1813 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { | |
1814 | u8 sta_id = iwl_hw_find_station(priv, sta->addr); | |
0795af57 JP |
1815 | DECLARE_MAC_BUF(mac); |
1816 | ||
b481de9c | 1817 | /* for IBSS the call are from tasklet */ |
0795af57 JP |
1818 | IWL_DEBUG_HT("LQ: ADD station %s\n", |
1819 | print_mac(mac, sta->addr)); | |
b481de9c ZY |
1820 | |
1821 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1822 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1823 | print_mac(mac, sta->addr)); | |
1824 | sta_id = iwl_add_station(priv, | |
b481de9c ZY |
1825 | sta->addr, 0, CMD_ASYNC); |
1826 | } | |
1827 | if ((sta_id != IWL_INVALID_STATION)) { | |
1828 | crl->lq.sta_id = sta_id; | |
1829 | crl->lq.rs_table[0].rate_n_flags = 0; | |
1830 | } | |
1831 | /* FIXME: this is w/a remove it later */ | |
1832 | priv->assoc_station_added = 1; | |
1833 | } | |
1834 | ||
1835 | for (i = 0; i < mode->num_rates; i++) { | |
1836 | if ((sta->supp_rates & BIT(i)) && | |
1837 | (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) | |
1838 | sta->txrate = i; | |
1839 | } | |
1840 | sta->last_txrate = sta->txrate; | |
1841 | /* For MODE_IEEE80211A mode cck rate are at end | |
1842 | * rate table | |
1843 | */ | |
1844 | if (local->hw.conf.phymode == MODE_IEEE80211A) | |
1845 | sta->last_txrate += IWL_FIRST_OFDM_RATE; | |
1846 | ||
1847 | crl->is_dup = priv->is_dup; | |
1848 | crl->valid_antenna = priv->valid_antenna; | |
1849 | crl->antenna = priv->antenna; | |
1850 | crl->is_green = rs_use_green(priv); | |
1851 | crl->active_rate = priv->active_rate; | |
1852 | crl->active_rate &= ~(0x1000); | |
1853 | crl->active_rate_basic = priv->active_rate_basic; | |
1854 | crl->phymode = priv->phymode; | |
1855 | #ifdef CONFIG_IWLWIFI_HT | |
1856 | crl->active_siso_rate = (priv->current_assoc_ht.supp_rates[0] << 1); | |
1857 | crl->active_siso_rate |= (priv->current_assoc_ht.supp_rates[0] & 0x1); | |
1858 | crl->active_siso_rate &= ~((u16)0x2); | |
1859 | crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE; | |
1860 | ||
1861 | crl->active_mimo_rate = (priv->current_assoc_ht.supp_rates[1] << 1); | |
1862 | crl->active_mimo_rate |= (priv->current_assoc_ht.supp_rates[1] & 0x1); | |
1863 | crl->active_mimo_rate &= ~((u16)0x2); | |
1864 | crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE; | |
1865 | IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, | |
1866 | crl->active_mimo_rate); | |
1867 | #endif /*CONFIG_IWLWIFI_HT*/ | |
1868 | ||
1869 | if (priv->assoc_station_added) | |
1870 | priv->lq_mngr.lq_ready = 1; | |
1871 | ||
1872 | rs_initialize_lq(priv, sta); | |
1873 | } | |
1874 | ||
1875 | static int rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, | |
1876 | struct iwl_rate *tx_mcs, | |
1877 | struct iwl_link_quality_cmd *lq_cmd, | |
1878 | struct sta_info *sta) | |
1879 | { | |
1880 | int index = 0; | |
1881 | int rc = 0; | |
1882 | int rate_idx; | |
1883 | u8 ant_toggle_count = 0; | |
1884 | u8 use_ht_possible = 1; | |
1885 | u8 repeat_cur_rate = 0; | |
1886 | struct iwl_rate new_rate; | |
1887 | struct iwl_scale_tbl_info tbl_type = { 0 }; | |
1888 | ||
1889 | rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode, | |
1890 | &tbl_type, &rate_idx); | |
1891 | ||
1892 | if (is_legacy(tbl_type.lq_type)) { | |
1893 | ant_toggle_count = 1; | |
1894 | repeat_cur_rate = IWL_NUMBER_TRY; | |
1895 | } else | |
1896 | repeat_cur_rate = IWL_HT_NUMBER_TRY; | |
1897 | ||
1898 | lq_cmd->general_params.mimo_delimiter = | |
1899 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
1900 | lq_cmd->rs_table[index].rate_n_flags = | |
1901 | cpu_to_le32(tx_mcs->rate_n_flags); | |
1902 | new_rate.rate_n_flags = tx_mcs->rate_n_flags; | |
1903 | ||
1904 | if (is_mimo(tbl_type.lq_type) || (tbl_type.antenna_type == ANT_MAIN)) | |
1905 | lq_cmd->general_params.single_stream_ant_msk = 1; | |
1906 | else | |
1907 | lq_cmd->general_params.single_stream_ant_msk = 2; | |
1908 | ||
1909 | index++; | |
1910 | repeat_cur_rate--; | |
1911 | ||
1912 | while (index < LINK_QUAL_MAX_RETRY_NUM) { | |
1913 | while (repeat_cur_rate && (index < LINK_QUAL_MAX_RETRY_NUM)) { | |
1914 | if (is_legacy(tbl_type.lq_type)) { | |
1915 | if (ant_toggle_count < | |
1916 | NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
1917 | ant_toggle_count++; | |
1918 | else { | |
1919 | rs_toggle_antenna(&new_rate, &tbl_type); | |
1920 | ant_toggle_count = 1; | |
1921 | } | |
1922 | } | |
1923 | lq_cmd->rs_table[index].rate_n_flags = | |
1924 | cpu_to_le32(new_rate.rate_n_flags); | |
1925 | repeat_cur_rate--; | |
1926 | index++; | |
1927 | } | |
1928 | ||
1929 | rs_get_tbl_info_from_mcs(&new_rate, lq_data->phymode, &tbl_type, | |
1930 | &rate_idx); | |
1931 | ||
1932 | if (is_mimo(tbl_type.lq_type)) | |
1933 | lq_cmd->general_params.mimo_delimiter = index; | |
1934 | ||
1935 | rs_get_lower_rate(lq_data, &tbl_type, rate_idx, | |
1936 | use_ht_possible, &new_rate, sta); | |
1937 | ||
1938 | if (is_legacy(tbl_type.lq_type)) { | |
1939 | if (ant_toggle_count < NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
1940 | ant_toggle_count++; | |
1941 | else { | |
1942 | rs_toggle_antenna(&new_rate, &tbl_type); | |
1943 | ant_toggle_count = 1; | |
1944 | } | |
1945 | repeat_cur_rate = IWL_NUMBER_TRY; | |
1946 | } else | |
1947 | repeat_cur_rate = IWL_HT_NUMBER_TRY; | |
1948 | ||
1949 | use_ht_possible = 0; | |
1950 | ||
1951 | lq_cmd->rs_table[index].rate_n_flags = | |
1952 | cpu_to_le32(new_rate.rate_n_flags); | |
1953 | /* lq_cmd->rs_table[index].rate_n_flags = 0x800d; */ | |
1954 | ||
1955 | index++; | |
1956 | repeat_cur_rate--; | |
1957 | } | |
1958 | ||
1959 | /* lq_cmd->rs_table[0].rate_n_flags = 0x800d; */ | |
1960 | ||
1961 | lq_cmd->general_params.dual_stream_ant_msk = 3; | |
1962 | lq_cmd->agg_params.agg_dis_start_th = 3; | |
1963 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
1964 | return rc; | |
1965 | } | |
1966 | ||
1967 | static void *rs_alloc(struct ieee80211_local *local) | |
1968 | { | |
1969 | return local->hw.priv; | |
1970 | } | |
1971 | /* rate scale requires free function to be implemented */ | |
1972 | static void rs_free(void *priv_rate) | |
1973 | { | |
1974 | return; | |
1975 | } | |
1976 | ||
1977 | static void rs_clear(void *priv_rate) | |
1978 | { | |
1979 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; | |
1980 | ||
1981 | IWL_DEBUG_RATE("enter\n"); | |
1982 | ||
1983 | priv->lq_mngr.lq_ready = 0; | |
1984 | #ifdef CONFIG_IWLWIFI_HT | |
1985 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
1986 | if (priv->lq_mngr.agg_ctrl.granted_ba) | |
1987 | iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED); | |
1988 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
1989 | #endif /* CONFIG_IWLWIFI_HT */ | |
1990 | ||
1991 | IWL_DEBUG_RATE("leave\n"); | |
1992 | } | |
1993 | ||
1994 | static void rs_free_sta(void *priv, void *priv_sta) | |
1995 | { | |
1996 | struct iwl_rate_scale_priv *rs_priv = priv_sta; | |
1997 | ||
1998 | IWL_DEBUG_RATE("enter\n"); | |
1999 | kfree(rs_priv); | |
2000 | IWL_DEBUG_RATE("leave\n"); | |
2001 | } | |
2002 | ||
2003 | ||
2004 | static struct rate_control_ops rs_ops = { | |
2005 | .module = NULL, | |
2006 | .name = RS_NAME, | |
2007 | .tx_status = rs_tx_status, | |
2008 | .get_rate = rs_get_rate, | |
2009 | .rate_init = rs_rate_init, | |
2010 | .clear = rs_clear, | |
2011 | .alloc = rs_alloc, | |
2012 | .free = rs_free, | |
2013 | .alloc_sta = rs_alloc_sta, | |
2014 | .free_sta = rs_free_sta, | |
2015 | }; | |
2016 | ||
2017 | int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) | |
2018 | { | |
2019 | struct ieee80211_local *local = hw_to_local(hw); | |
2020 | struct iwl_priv *priv = hw->priv; | |
2021 | struct iwl_rate_scale_priv *rs_priv; | |
2022 | struct sta_info *sta; | |
2023 | int count = 0, i; | |
2024 | u32 samples = 0, success = 0, good = 0; | |
2025 | unsigned long now = jiffies; | |
2026 | u32 max_time = 0; | |
2027 | u8 lq_type, antenna; | |
2028 | ||
2029 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); | |
2030 | if (!sta || !sta->rate_ctrl_priv) { | |
2031 | if (sta) { | |
2032 | sta_info_put(sta); | |
2033 | IWL_DEBUG_RATE("leave - no private rate data!\n"); | |
2034 | } else | |
2035 | IWL_DEBUG_RATE("leave - no station!\n"); | |
2036 | return sprintf(buf, "station %d not found\n", sta_id); | |
2037 | } | |
2038 | ||
2039 | rs_priv = (void *)sta->rate_ctrl_priv; | |
2040 | ||
2041 | lq_type = rs_priv->lq_info[rs_priv->active_tbl].lq_type; | |
2042 | antenna = rs_priv->lq_info[rs_priv->active_tbl].antenna_type; | |
2043 | ||
2044 | if (is_legacy(lq_type)) | |
2045 | i = IWL_RATE_54M_INDEX; | |
2046 | else | |
2047 | i = IWL_RATE_60M_INDEX; | |
2048 | while (1) { | |
2049 | u64 mask; | |
2050 | int j; | |
2051 | int active = rs_priv->active_tbl; | |
2052 | ||
2053 | count += | |
2054 | sprintf(&buf[count], " %2dMbs: ", iwl_rates[i].ieee / 2); | |
2055 | ||
2056 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2057 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
2058 | buf[count++] = | |
2059 | (rs_priv->lq_info[active].win[i].data & mask) | |
2060 | ? '1' : '0'; | |
2061 | ||
2062 | samples += rs_priv->lq_info[active].win[i].counter; | |
2063 | good += rs_priv->lq_info[active].win[i].success_counter; | |
2064 | success += rs_priv->lq_info[active].win[i].success_counter * | |
2065 | iwl_rates[i].ieee; | |
2066 | ||
2067 | if (rs_priv->lq_info[active].win[i].stamp) { | |
2068 | int delta = | |
2069 | jiffies_to_msecs(now - | |
2070 | rs_priv->lq_info[active].win[i].stamp); | |
2071 | ||
2072 | if (delta > max_time) | |
2073 | max_time = delta; | |
2074 | ||
2075 | count += sprintf(&buf[count], "%5dms\n", delta); | |
2076 | } else | |
2077 | buf[count++] = '\n'; | |
2078 | ||
2079 | j = iwl_get_prev_ieee_rate(i); | |
2080 | if (j == i) | |
2081 | break; | |
2082 | i = j; | |
2083 | } | |
2084 | ||
2085 | /* Display the average rate of all samples taken. | |
2086 | * | |
2087 | * NOTE: We multiple # of samples by 2 since the IEEE measurement | |
2088 | * added from iwl_rates is actually 2X the rate */ | |
2089 | if (samples) | |
2090 | count += sprintf(&buf[count], | |
2091 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" | |
2092 | "%3d%% success (%d good packets over %d tries)\n", | |
2093 | success / (2 * samples), (success * 5 / samples) % 10, | |
2094 | max_time, good * 100 / samples, good, samples); | |
2095 | else | |
2096 | count += sprintf(&buf[count], "\nAverage rate: 0Mbs\n"); | |
2097 | count += sprintf(&buf[count], "\nrate scale type %d anntena %d " | |
2098 | "active_search %d rate index %d\n", lq_type, antenna, | |
2099 | rs_priv->search_better_tbl, sta->last_txrate); | |
2100 | ||
2101 | sta_info_put(sta); | |
2102 | return count; | |
2103 | } | |
2104 | ||
2105 | void iwl_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) | |
2106 | { | |
2107 | struct iwl_priv *priv = hw->priv; | |
2108 | ||
2109 | priv->lq_mngr.lq_ready = 1; | |
2110 | } | |
2111 | ||
2112 | void iwl_rate_control_register(struct ieee80211_hw *hw) | |
2113 | { | |
2114 | ieee80211_rate_control_register(&rs_ops); | |
2115 | } | |
2116 | ||
2117 | void iwl_rate_control_unregister(struct ieee80211_hw *hw) | |
2118 | { | |
2119 | ieee80211_rate_control_unregister(&rs_ops); | |
2120 | } | |
2121 |