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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 | ||
1156b2c6 ZY |
42 | #define IWL 4965 |
43 | ||
b481de9c ZY |
44 | #include "../net/mac80211/ieee80211_rate.h" |
45 | ||
46 | #include "iwlwifi.h" | |
47 | #include "iwl-helpers.h" | |
48 | ||
49 | #define RS_NAME "iwl-4965-rs" | |
50 | ||
51 | #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1 | |
52 | #define IWL_NUMBER_TRY 1 | |
53 | #define IWL_HT_NUMBER_TRY 3 | |
54 | ||
55 | #define IWL_RATE_MAX_WINDOW 62 | |
56 | #define IWL_RATE_HIGH_TH 10880 | |
57 | #define IWL_RATE_MIN_FAILURE_TH 6 | |
58 | #define IWL_RATE_MIN_SUCCESS_TH 8 | |
59 | #define IWL_RATE_DECREASE_TH 1920 | |
60 | #define IWL_RATE_INCREASE_TH 8960 | |
61 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) /*2 seconds */ | |
62 | ||
63 | static u8 rs_ht_to_legacy[] = { | |
64 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
65 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
66 | IWL_RATE_6M_INDEX, | |
67 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
68 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
69 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
70 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
71 | }; | |
72 | ||
73 | struct iwl_rate { | |
74 | u32 rate_n_flags; | |
75 | } __attribute__ ((packed)); | |
76 | ||
77 | struct iwl_rate_scale_data { | |
78 | u64 data; | |
79 | s32 success_counter; | |
80 | s32 success_ratio; | |
81 | s32 counter; | |
82 | s32 average_tpt; | |
83 | unsigned long stamp; | |
84 | }; | |
85 | ||
86 | struct iwl_scale_tbl_info { | |
87 | enum iwl_table_type lq_type; | |
88 | enum iwl_antenna_type antenna_type; | |
89 | u8 is_SGI; | |
90 | u8 is_fat; | |
91 | u8 is_dup; | |
92 | u8 action; | |
93 | s32 *expected_tpt; | |
94 | struct iwl_rate current_rate; | |
95 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; | |
96 | }; | |
97 | ||
98 | struct iwl_rate_scale_priv { | |
99 | u8 active_tbl; | |
100 | u8 enable_counter; | |
101 | u8 stay_in_tbl; | |
102 | u8 search_better_tbl; | |
103 | s32 last_tpt; | |
104 | u32 table_count_limit; | |
105 | u32 max_failure_limit; | |
106 | u32 max_success_limit; | |
107 | u32 table_count; | |
108 | u32 total_failed; | |
109 | u32 total_success; | |
110 | u32 flush_timer; | |
111 | u8 action_counter; | |
112 | u8 antenna; | |
113 | u8 valid_antenna; | |
114 | u8 is_green; | |
115 | u8 is_dup; | |
116 | u8 phymode; | |
117 | u8 ibss_sta_added; | |
02dede04 | 118 | u32 supp_rates; |
b481de9c ZY |
119 | u16 active_rate; |
120 | u16 active_siso_rate; | |
121 | u16 active_mimo_rate; | |
122 | u16 active_rate_basic; | |
123 | struct iwl_link_quality_cmd lq; | |
124 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; | |
5ae212c9 ZY |
125 | #ifdef CONFIG_MAC80211_DEBUGFS |
126 | struct dentry *rs_sta_dbgfs_scale_table_file; | |
127 | #endif | |
b481de9c ZY |
128 | }; |
129 | ||
130 | static void rs_rate_scale_perform(struct iwl_priv *priv, | |
131 | struct net_device *dev, | |
132 | struct ieee80211_hdr *hdr, | |
133 | struct sta_info *sta); | |
134 | static int rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, | |
135 | struct iwl_rate *tx_mcs, | |
02dede04 | 136 | struct iwl_link_quality_cmd *tbl); |
b481de9c ZY |
137 | |
138 | ||
139 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { | |
140 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
141 | }; | |
142 | ||
143 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
144 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
145 | }; | |
146 | ||
147 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
148 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
149 | }; | |
150 | ||
151 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
152 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
153 | }; | |
154 | ||
155 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
156 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
157 | }; | |
158 | ||
159 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
160 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
161 | }; | |
162 | ||
163 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
164 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
165 | }; | |
166 | ||
167 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
168 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
169 | }; | |
170 | ||
171 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
172 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
173 | }; | |
174 | ||
175 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
176 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
177 | }; | |
178 | ||
179 | static int iwl_lq_sync_callback(struct iwl_priv *priv, | |
180 | struct iwl_cmd *cmd, struct sk_buff *skb) | |
181 | { | |
182 | /*We didn't cache the SKB; let the caller free it */ | |
183 | return 1; | |
184 | } | |
185 | ||
186 | static inline u8 iwl_rate_get_rate(u32 rate_n_flags) | |
187 | { | |
188 | return (u8)(rate_n_flags & 0xFF); | |
189 | } | |
190 | ||
191 | static int rs_send_lq_cmd(struct iwl_priv *priv, | |
192 | struct iwl_link_quality_cmd *lq, u8 flags) | |
193 | { | |
194 | #ifdef CONFIG_IWLWIFI_DEBUG | |
195 | int i; | |
196 | #endif | |
197 | int rc = -1; | |
198 | ||
199 | struct iwl_host_cmd cmd = { | |
200 | .id = REPLY_TX_LINK_QUALITY_CMD, | |
201 | .len = sizeof(struct iwl_link_quality_cmd), | |
202 | .meta.flags = flags, | |
203 | .data = lq, | |
204 | }; | |
205 | ||
206 | if ((lq->sta_id == 0xFF) && | |
207 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
208 | return rc; | |
209 | ||
210 | if (lq->sta_id == 0xFF) | |
211 | lq->sta_id = IWL_AP_ID; | |
212 | ||
213 | IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id); | |
214 | IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n", | |
215 | lq->general_params.single_stream_ant_msk, | |
216 | lq->general_params.dual_stream_ant_msk); | |
217 | #ifdef CONFIG_IWLWIFI_DEBUG | |
218 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
219 | IWL_DEBUG_RATE("lq index %d 0x%X\n", | |
220 | i, lq->rs_table[i].rate_n_flags); | |
221 | #endif | |
222 | ||
223 | if (flags & CMD_ASYNC) | |
224 | cmd.meta.u.callback = iwl_lq_sync_callback; | |
225 | ||
226 | if (iwl_is_associated(priv) && priv->assoc_station_added && | |
227 | priv->lq_mngr.lq_ready) | |
228 | rc = iwl_send_cmd(priv, &cmd); | |
229 | ||
230 | return rc; | |
231 | } | |
232 | ||
233 | static int rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) | |
234 | { | |
235 | window->data = 0; | |
236 | window->success_counter = 0; | |
237 | window->success_ratio = IWL_INVALID_VALUE; | |
238 | window->counter = 0; | |
239 | window->average_tpt = IWL_INVALID_VALUE; | |
240 | window->stamp = 0; | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, | |
246 | int scale_index, s32 tpt, u32 status) | |
247 | { | |
248 | int rc = 0; | |
249 | struct iwl_rate_scale_data *window = NULL; | |
250 | u64 mask; | |
251 | u8 win_size = IWL_RATE_MAX_WINDOW; | |
252 | s32 fail_count; | |
253 | ||
254 | if (scale_index < 0) | |
255 | return -1; | |
256 | ||
257 | if (scale_index >= IWL_RATE_COUNT) | |
258 | return -1; | |
259 | ||
260 | window = &(windows[scale_index]); | |
261 | ||
262 | if (window->counter >= win_size) { | |
263 | ||
264 | window->counter = win_size - 1; | |
265 | mask = 1; | |
266 | mask = (mask << (win_size - 1)); | |
267 | if ((window->data & mask)) { | |
268 | window->data &= ~mask; | |
269 | window->success_counter = window->success_counter - 1; | |
270 | } | |
271 | } | |
272 | ||
273 | window->counter = window->counter + 1; | |
274 | mask = window->data; | |
275 | window->data = (mask << 1); | |
276 | if (status != 0) { | |
277 | window->success_counter = window->success_counter + 1; | |
278 | window->data |= 0x1; | |
279 | } | |
280 | ||
281 | if (window->counter > 0) | |
282 | window->success_ratio = 128 * (100 * window->success_counter) | |
283 | / window->counter; | |
284 | else | |
285 | window->success_ratio = IWL_INVALID_VALUE; | |
286 | ||
287 | fail_count = window->counter - window->success_counter; | |
288 | ||
289 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || | |
290 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
291 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
292 | else | |
293 | window->average_tpt = IWL_INVALID_VALUE; | |
294 | ||
295 | window->stamp = jiffies; | |
296 | ||
297 | return rc; | |
298 | } | |
299 | ||
300 | int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, | |
301 | struct iwl_scale_tbl_info *tbl, | |
302 | int index, u8 use_green) | |
303 | { | |
304 | int rc = 0; | |
305 | ||
306 | if (is_legacy(tbl->lq_type)) { | |
307 | mcs_rate->rate_n_flags = iwl_rates[index].plcp; | |
308 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) | |
309 | mcs_rate->rate_n_flags |= RATE_MCS_CCK_MSK; | |
310 | ||
311 | } else if (is_siso(tbl->lq_type)) { | |
312 | if (index > IWL_LAST_OFDM_RATE) | |
313 | index = IWL_LAST_OFDM_RATE; | |
314 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_siso | | |
315 | RATE_MCS_HT_MSK; | |
316 | } else { | |
317 | if (index > IWL_LAST_OFDM_RATE) | |
318 | index = IWL_LAST_OFDM_RATE; | |
319 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_mimo | | |
320 | RATE_MCS_HT_MSK; | |
321 | } | |
322 | ||
323 | switch (tbl->antenna_type) { | |
324 | case ANT_BOTH: | |
325 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_AB_MSK; | |
326 | break; | |
327 | case ANT_MAIN: | |
328 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
329 | break; | |
330 | case ANT_AUX: | |
331 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
332 | break; | |
333 | case ANT_NONE: | |
334 | break; | |
335 | } | |
336 | ||
337 | if (is_legacy(tbl->lq_type)) | |
338 | return rc; | |
339 | ||
340 | if (tbl->is_fat) { | |
341 | if (tbl->is_dup) | |
342 | mcs_rate->rate_n_flags |= RATE_MCS_DUP_MSK; | |
343 | else | |
344 | mcs_rate->rate_n_flags |= RATE_MCS_FAT_MSK; | |
345 | } | |
346 | if (tbl->is_SGI) | |
347 | mcs_rate->rate_n_flags |= RATE_MCS_SGI_MSK; | |
348 | ||
349 | if (use_green) { | |
350 | mcs_rate->rate_n_flags |= RATE_MCS_GF_MSK; | |
351 | if (is_siso(tbl->lq_type)) | |
352 | mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
353 | } | |
354 | return rc; | |
355 | } | |
356 | ||
357 | static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, | |
358 | int phymode, struct iwl_scale_tbl_info *tbl, | |
359 | int *rate_idx) | |
360 | { | |
361 | int index; | |
362 | u32 ant_msk; | |
363 | ||
364 | index = iwl_rate_index_from_plcp(mcs_rate->rate_n_flags); | |
365 | ||
366 | if (index == IWL_RATE_INVALID) { | |
367 | *rate_idx = -1; | |
368 | return -1; | |
369 | } | |
370 | tbl->is_SGI = 0; | |
371 | tbl->is_fat = 0; | |
372 | tbl->is_dup = 0; | |
373 | tbl->antenna_type = ANT_BOTH; | |
374 | ||
375 | if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { | |
376 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
377 | ||
378 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
379 | tbl->lq_type = LQ_NONE; | |
380 | else { | |
381 | ||
382 | if (phymode == MODE_IEEE80211A) | |
383 | tbl->lq_type = LQ_A; | |
384 | else | |
385 | tbl->lq_type = LQ_G; | |
386 | ||
387 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
388 | tbl->antenna_type = ANT_MAIN; | |
389 | else | |
390 | tbl->antenna_type = ANT_AUX; | |
391 | } | |
392 | *rate_idx = index; | |
393 | ||
394 | } else if (iwl_rate_get_rate(mcs_rate->rate_n_flags) | |
395 | <= IWL_RATE_SISO_60M_PLCP) { | |
396 | tbl->lq_type = LQ_SISO; | |
397 | ||
398 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
399 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
400 | tbl->lq_type = LQ_NONE; | |
401 | else { | |
402 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
403 | tbl->antenna_type = ANT_MAIN; | |
404 | else | |
405 | tbl->antenna_type = ANT_AUX; | |
406 | } | |
407 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
408 | tbl->is_SGI = 1; | |
409 | ||
410 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
411 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
412 | tbl->is_fat = 1; | |
413 | ||
414 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
415 | tbl->is_dup = 1; | |
416 | ||
417 | *rate_idx = index; | |
418 | } else { | |
419 | tbl->lq_type = LQ_MIMO; | |
420 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
421 | tbl->is_SGI = 1; | |
422 | ||
423 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
424 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
425 | tbl->is_fat = 1; | |
426 | ||
427 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
428 | tbl->is_dup = 1; | |
429 | *rate_idx = index; | |
430 | } | |
431 | return 0; | |
432 | } | |
433 | ||
434 | static inline void rs_toggle_antenna(struct iwl_rate *new_rate, | |
435 | struct iwl_scale_tbl_info *tbl) | |
436 | { | |
437 | if (tbl->antenna_type == ANT_AUX) { | |
438 | tbl->antenna_type = ANT_MAIN; | |
439 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_B_MSK; | |
440 | new_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
441 | } else { | |
442 | tbl->antenna_type = ANT_AUX; | |
443 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
444 | new_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
445 | } | |
446 | } | |
447 | ||
448 | static inline s8 rs_use_green(struct iwl_priv *priv) | |
449 | { | |
450 | s8 rc = 0; | |
451 | #ifdef CONFIG_IWLWIFI_HT | |
452 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
453 | return 0; | |
454 | ||
455 | if ((priv->current_assoc_ht.is_green_field) && | |
456 | !(priv->current_assoc_ht.operating_mode & 0x4)) | |
457 | rc = 1; | |
458 | #endif /*CONFIG_IWLWIFI_HT */ | |
459 | return rc; | |
460 | } | |
461 | ||
462 | /** | |
463 | * rs_get_supported_rates - get the available rates | |
464 | * | |
465 | * if management frame or broadcast frame only return | |
466 | * basic available rates. | |
467 | * | |
468 | */ | |
469 | static void rs_get_supported_rates(struct iwl_rate_scale_priv *lq_data, | |
470 | struct ieee80211_hdr *hdr, | |
471 | enum iwl_table_type rate_type, | |
472 | u16 *data_rate) | |
473 | { | |
474 | if (is_legacy(rate_type)) | |
475 | *data_rate = lq_data->active_rate; | |
476 | else { | |
477 | if (is_siso(rate_type)) | |
478 | *data_rate = lq_data->active_siso_rate; | |
479 | else | |
480 | *data_rate = lq_data->active_mimo_rate; | |
481 | } | |
482 | ||
483 | if (hdr && is_multicast_ether_addr(hdr->addr1) && | |
484 | lq_data->active_rate_basic) | |
485 | *data_rate = lq_data->active_rate_basic; | |
486 | } | |
487 | ||
488 | static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) | |
489 | { | |
490 | u8 high = IWL_RATE_INVALID; | |
491 | u8 low = IWL_RATE_INVALID; | |
492 | ||
493 | /* 802.11A or ht walks to the next literal adjascent rate in | |
494 | * the rate table */ | |
495 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
496 | int i; | |
497 | u32 mask; | |
498 | ||
499 | /* Find the previous rate that is in the rate mask */ | |
500 | i = index - 1; | |
501 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
502 | if (rate_mask & mask) { | |
503 | low = i; | |
504 | break; | |
505 | } | |
506 | } | |
507 | ||
508 | /* Find the next rate that is in the rate mask */ | |
509 | i = index + 1; | |
510 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
511 | if (rate_mask & mask) { | |
512 | high = i; | |
513 | break; | |
514 | } | |
515 | } | |
516 | ||
517 | return (high << 8) | low; | |
518 | } | |
519 | ||
520 | low = index; | |
521 | while (low != IWL_RATE_INVALID) { | |
522 | low = iwl_rates[low].prev_rs; | |
523 | if (low == IWL_RATE_INVALID) | |
524 | break; | |
525 | if (rate_mask & (1 << low)) | |
526 | break; | |
527 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
528 | } | |
529 | ||
530 | high = index; | |
531 | while (high != IWL_RATE_INVALID) { | |
532 | high = iwl_rates[high].next_rs; | |
533 | if (high == IWL_RATE_INVALID) | |
534 | break; | |
535 | if (rate_mask & (1 << high)) | |
536 | break; | |
537 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
538 | } | |
539 | ||
540 | return (high << 8) | low; | |
541 | } | |
542 | ||
543 | static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, | |
544 | struct iwl_scale_tbl_info *tbl, u8 scale_index, | |
02dede04 | 545 | u8 ht_possible, struct iwl_rate *mcs_rate) |
b481de9c | 546 | { |
b481de9c ZY |
547 | s32 low; |
548 | u16 rate_mask; | |
549 | u16 high_low; | |
550 | u8 switch_to_legacy = 0; | |
02dede04 | 551 | u8 is_green = lq_data->is_green; |
b481de9c ZY |
552 | |
553 | /* check if we need to switch from HT to legacy rates. | |
554 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
555 | * are always supported (spec demand) */ | |
556 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
557 | switch_to_legacy = 1; | |
558 | scale_index = rs_ht_to_legacy[scale_index]; | |
559 | if (lq_data->phymode == MODE_IEEE80211A) | |
560 | tbl->lq_type = LQ_A; | |
561 | else | |
562 | tbl->lq_type = LQ_G; | |
563 | ||
564 | if ((tbl->antenna_type == ANT_BOTH) || | |
565 | (tbl->antenna_type == ANT_NONE)) | |
566 | tbl->antenna_type = ANT_MAIN; | |
567 | ||
568 | tbl->is_fat = 0; | |
569 | tbl->is_SGI = 0; | |
570 | } | |
571 | ||
572 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, &rate_mask); | |
573 | ||
574 | /* mask with station rate restriction */ | |
575 | if (is_legacy(tbl->lq_type)) { | |
576 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
577 | rate_mask = (u16)(rate_mask & | |
02dede04 | 578 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 579 | else |
02dede04 | 580 | rate_mask = (u16)(rate_mask & lq_data->supp_rates); |
b481de9c ZY |
581 | } |
582 | ||
583 | /* if we did switched from HT to legacy check current rate */ | |
584 | if ((switch_to_legacy) && | |
585 | (rate_mask & (1 << scale_index))) { | |
586 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
587 | return 0; | |
588 | } | |
589 | ||
590 | high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); | |
591 | low = high_low & 0xff; | |
592 | ||
593 | if (low != IWL_RATE_INVALID) | |
594 | rs_mcs_from_tbl(mcs_rate, tbl, low, is_green); | |
595 | else | |
596 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
601 | static void rs_tx_status(void *priv_rate, | |
602 | struct net_device *dev, | |
603 | struct sk_buff *skb, | |
604 | struct ieee80211_tx_status *tx_resp) | |
605 | { | |
606 | int status; | |
607 | u8 retries; | |
608 | int rs_index, index = 0; | |
609 | struct iwl_rate_scale_priv *lq; | |
610 | struct iwl_link_quality_cmd *table; | |
611 | struct sta_info *sta; | |
612 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
613 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
614 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
615 | struct iwl_rate_scale_data *window = NULL; | |
616 | struct iwl_rate_scale_data *search_win = NULL; | |
617 | struct iwl_rate tx_mcs; | |
618 | struct iwl_scale_tbl_info tbl_type; | |
619 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
620 | u8 active_index = 0; | |
621 | u16 fc = le16_to_cpu(hdr->frame_control); | |
622 | s32 tpt = 0; | |
623 | ||
58826351 | 624 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
625 | |
626 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
627 | return; | |
628 | ||
629 | retries = tx_resp->retry_count; | |
630 | ||
631 | if (retries > 15) | |
632 | retries = 15; | |
633 | ||
634 | ||
635 | sta = sta_info_get(local, hdr->addr1); | |
636 | ||
637 | if (!sta || !sta->rate_ctrl_priv) { | |
638 | if (sta) | |
639 | sta_info_put(sta); | |
640 | return; | |
641 | } | |
642 | ||
643 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
644 | ||
645 | if (!priv->lq_mngr.lq_ready) | |
646 | return; | |
647 | ||
648 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) | |
649 | return; | |
650 | ||
651 | table = &lq->lq; | |
652 | active_index = lq->active_tbl; | |
653 | ||
654 | lq->antenna = (lq->valid_antenna & local->hw.conf.antenna_sel_tx); | |
655 | if (!lq->antenna) | |
656 | lq->antenna = lq->valid_antenna; | |
657 | ||
658 | lq->antenna = lq->valid_antenna; | |
659 | curr_tbl = &(lq->lq_info[active_index]); | |
660 | search_tbl = &(lq->lq_info[(1 - active_index)]); | |
661 | window = (struct iwl_rate_scale_data *) | |
662 | &(curr_tbl->win[0]); | |
663 | search_win = (struct iwl_rate_scale_data *) | |
664 | &(search_tbl->win[0]); | |
665 | ||
666 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
667 | ||
668 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
669 | &tbl_type, &rs_index); | |
670 | if ((rs_index < 0) || (rs_index >= IWL_RATE_COUNT)) { | |
671 | IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n", | |
672 | rs_index, tx_mcs.rate_n_flags); | |
673 | sta_info_put(sta); | |
674 | return; | |
675 | } | |
676 | ||
677 | if (retries && | |
678 | (tx_mcs.rate_n_flags != | |
679 | le32_to_cpu(table->rs_table[0].rate_n_flags))) { | |
680 | IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n", | |
681 | tx_mcs.rate_n_flags, | |
682 | le32_to_cpu(table->rs_table[0].rate_n_flags)); | |
683 | sta_info_put(sta); | |
684 | return; | |
685 | } | |
686 | ||
687 | while (retries) { | |
688 | tx_mcs.rate_n_flags = | |
689 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
690 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
691 | &tbl_type, &rs_index); | |
692 | ||
693 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
694 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
695 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
696 | if (search_tbl->expected_tpt) | |
697 | tpt = search_tbl->expected_tpt[rs_index]; | |
698 | else | |
699 | tpt = 0; | |
700 | rs_collect_tx_data(search_win, | |
701 | rs_index, tpt, 0); | |
702 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
703 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
704 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
705 | if (curr_tbl->expected_tpt) | |
706 | tpt = curr_tbl->expected_tpt[rs_index]; | |
707 | else | |
708 | tpt = 0; | |
709 | rs_collect_tx_data(window, rs_index, tpt, 0); | |
710 | } | |
711 | if (lq->stay_in_tbl) | |
712 | lq->total_failed++; | |
713 | --retries; | |
714 | index++; | |
715 | ||
716 | } | |
717 | ||
718 | if (!tx_resp->retry_count) | |
719 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
720 | else | |
721 | tx_mcs.rate_n_flags = | |
722 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
723 | ||
724 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
725 | &tbl_type, &rs_index); | |
726 | ||
727 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) | |
728 | status = 1; | |
729 | else | |
730 | status = 0; | |
731 | ||
732 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
733 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
734 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
735 | if (search_tbl->expected_tpt) | |
736 | tpt = search_tbl->expected_tpt[rs_index]; | |
737 | else | |
738 | tpt = 0; | |
739 | rs_collect_tx_data(search_win, | |
740 | rs_index, tpt, status); | |
741 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
742 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
743 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
744 | if (curr_tbl->expected_tpt) | |
745 | tpt = curr_tbl->expected_tpt[rs_index]; | |
746 | else | |
747 | tpt = 0; | |
748 | rs_collect_tx_data(window, rs_index, tpt, status); | |
749 | } | |
750 | ||
751 | if (lq->stay_in_tbl) { | |
752 | if (status) | |
753 | lq->total_success++; | |
754 | else | |
755 | lq->total_failed++; | |
756 | } | |
757 | ||
758 | rs_rate_scale_perform(priv, dev, hdr, sta); | |
759 | sta_info_put(sta); | |
760 | return; | |
761 | } | |
762 | ||
763 | static u8 rs_is_ant_connected(u8 valid_antenna, | |
764 | enum iwl_antenna_type antenna_type) | |
765 | { | |
766 | if (antenna_type == ANT_AUX) | |
767 | return ((valid_antenna & 0x2) ? 1:0); | |
768 | else if (antenna_type == ANT_MAIN) | |
769 | return ((valid_antenna & 0x1) ? 1:0); | |
770 | else if (antenna_type == ANT_BOTH) { | |
771 | if ((valid_antenna & 0x3) == 0x3) | |
772 | return 1; | |
773 | else | |
774 | return 0; | |
775 | } | |
776 | ||
777 | return 1; | |
778 | } | |
779 | ||
780 | static u8 rs_is_other_ant_connected(u8 valid_antenna, | |
781 | enum iwl_antenna_type antenna_type) | |
782 | { | |
783 | if (antenna_type == ANT_AUX) | |
784 | return (rs_is_ant_connected(valid_antenna, ANT_MAIN)); | |
785 | else | |
786 | return (rs_is_ant_connected(valid_antenna, ANT_AUX)); | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | static void rs_set_stay_in_table(u8 is_legacy, | |
792 | struct iwl_rate_scale_priv *lq_data) | |
793 | { | |
794 | IWL_DEBUG_HT("we are staying in the same table\n"); | |
795 | lq_data->stay_in_tbl = 1; | |
796 | if (is_legacy) { | |
797 | lq_data->table_count_limit = IWL_LEGACY_TABLE_COUNT; | |
798 | lq_data->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
799 | lq_data->max_success_limit = IWL_LEGACY_TABLE_COUNT; | |
800 | } else { | |
801 | lq_data->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; | |
802 | lq_data->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
803 | lq_data->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
804 | } | |
805 | lq_data->table_count = 0; | |
806 | lq_data->total_failed = 0; | |
807 | lq_data->total_success = 0; | |
808 | } | |
809 | ||
810 | static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, | |
811 | struct iwl_scale_tbl_info *tbl) | |
812 | { | |
813 | if (is_legacy(tbl->lq_type)) { | |
814 | if (!is_a_band(tbl->lq_type)) | |
815 | tbl->expected_tpt = expected_tpt_G; | |
816 | else | |
817 | tbl->expected_tpt = expected_tpt_A; | |
818 | } else if (is_siso(tbl->lq_type)) { | |
819 | if (tbl->is_fat && !lq_data->is_dup) | |
820 | if (tbl->is_SGI) | |
821 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
822 | else | |
823 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
824 | else if (tbl->is_SGI) | |
825 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
826 | else | |
827 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
828 | ||
829 | } else if (is_mimo(tbl->lq_type)) { | |
830 | if (tbl->is_fat && !lq_data->is_dup) | |
831 | if (tbl->is_SGI) | |
832 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
833 | else | |
834 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
835 | else if (tbl->is_SGI) | |
836 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
837 | else | |
838 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
839 | } else | |
840 | tbl->expected_tpt = expected_tpt_G; | |
841 | } | |
842 | ||
843 | #ifdef CONFIG_IWLWIFI_HT | |
844 | static s32 rs_get_best_rate(struct iwl_priv *priv, | |
845 | struct iwl_rate_scale_priv *lq_data, | |
846 | struct iwl_scale_tbl_info *tbl, | |
847 | u16 rate_mask, s8 index, s8 rate) | |
848 | { | |
849 | struct iwl_scale_tbl_info *active_tbl = | |
850 | &(lq_data->lq_info[lq_data->active_tbl]); | |
851 | s32 new_rate, high, low, start_hi; | |
852 | s32 active_sr = active_tbl->win[index].success_ratio; | |
853 | s32 *tpt_tbl = tbl->expected_tpt; | |
854 | s32 active_tpt = active_tbl->expected_tpt[index]; | |
855 | u16 high_low; | |
856 | ||
857 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
858 | ||
859 | for (; ;) { | |
860 | high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); | |
861 | ||
862 | low = high_low & 0xff; | |
863 | high = (high_low >> 8) & 0xff; | |
864 | ||
865 | if ((((100 * tpt_tbl[rate]) > lq_data->last_tpt) && | |
866 | ((active_sr > IWL_RATE_DECREASE_TH) && | |
867 | (active_sr <= IWL_RATE_HIGH_TH) && | |
868 | (tpt_tbl[rate] <= active_tpt))) || | |
869 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
870 | (tpt_tbl[rate] > active_tpt))) { | |
871 | ||
872 | if (start_hi != IWL_RATE_INVALID) { | |
873 | new_rate = start_hi; | |
874 | break; | |
875 | } | |
876 | new_rate = rate; | |
877 | if (low != IWL_RATE_INVALID) | |
878 | rate = low; | |
879 | else | |
880 | break; | |
881 | } else { | |
882 | if (new_rate != IWL_RATE_INVALID) | |
883 | break; | |
884 | else if (high != IWL_RATE_INVALID) { | |
885 | start_hi = high; | |
886 | rate = high; | |
887 | } else { | |
888 | new_rate = rate; | |
889 | break; | |
890 | } | |
891 | } | |
892 | } | |
893 | ||
894 | return new_rate; | |
895 | } | |
896 | #endif /* CONFIG_IWLWIFI_HT */ | |
897 | ||
898 | static inline u8 rs_is_both_ant_supp(u8 valid_antenna) | |
899 | { | |
900 | return (rs_is_ant_connected(valid_antenna, ANT_BOTH)); | |
901 | } | |
902 | ||
903 | static int rs_switch_to_mimo(struct iwl_priv *priv, | |
904 | struct iwl_rate_scale_priv *lq_data, | |
905 | struct iwl_scale_tbl_info *tbl, int index) | |
906 | { | |
907 | int rc = -1; | |
908 | #ifdef CONFIG_IWLWIFI_HT | |
909 | u16 rate_mask; | |
910 | s32 rate; | |
911 | s8 is_green = lq_data->is_green; | |
912 | ||
913 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
914 | return -1; | |
915 | ||
916 | IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); | |
917 | tbl->lq_type = LQ_MIMO; | |
918 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
919 | &rate_mask); | |
920 | ||
921 | if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) | |
922 | return -1; | |
923 | ||
924 | if (!rs_is_both_ant_supp(lq_data->antenna)) | |
925 | return -1; | |
926 | ||
927 | rc = 0; | |
928 | tbl->is_dup = lq_data->is_dup; | |
929 | tbl->action = 0; | |
930 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
931 | tbl->is_fat = 1; | |
932 | else | |
933 | tbl->is_fat = 0; | |
934 | ||
935 | if (tbl->is_fat) { | |
936 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
937 | tbl->is_SGI = 1; | |
938 | else | |
939 | tbl->is_SGI = 0; | |
940 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
941 | tbl->is_SGI = 1; | |
942 | else | |
943 | tbl->is_SGI = 0; | |
944 | ||
945 | rs_get_expected_tpt_table(lq_data, tbl); | |
946 | ||
947 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
948 | ||
949 | IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate, rate_mask); | |
950 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) | |
951 | return -1; | |
952 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
953 | ||
954 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
955 | tbl->current_rate.rate_n_flags, is_green); | |
956 | ||
957 | #endif /*CONFIG_IWLWIFI_HT */ | |
958 | return rc; | |
959 | } | |
960 | ||
961 | static int rs_switch_to_siso(struct iwl_priv *priv, | |
962 | struct iwl_rate_scale_priv *lq_data, | |
963 | struct iwl_scale_tbl_info *tbl, int index) | |
964 | { | |
965 | int rc = -1; | |
966 | #ifdef CONFIG_IWLWIFI_HT | |
967 | u16 rate_mask; | |
968 | u8 is_green = lq_data->is_green; | |
969 | s32 rate; | |
970 | ||
971 | IWL_DEBUG_HT("LQ: try to switch to SISO\n"); | |
972 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
973 | return -1; | |
974 | ||
975 | rc = 0; | |
976 | tbl->is_dup = lq_data->is_dup; | |
977 | tbl->lq_type = LQ_SISO; | |
978 | tbl->action = 0; | |
979 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
980 | &rate_mask); | |
981 | ||
982 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
983 | tbl->is_fat = 1; | |
984 | else | |
985 | tbl->is_fat = 0; | |
986 | ||
987 | if (tbl->is_fat) { | |
988 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
989 | tbl->is_SGI = 1; | |
990 | else | |
991 | tbl->is_SGI = 0; | |
992 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
993 | tbl->is_SGI = 1; | |
994 | else | |
995 | tbl->is_SGI = 0; | |
996 | ||
997 | if (is_green) | |
998 | tbl->is_SGI = 0; | |
999 | ||
1000 | rs_get_expected_tpt_table(lq_data, tbl); | |
1001 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
1002 | ||
1003 | IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask); | |
1004 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
1005 | IWL_DEBUG_HT("can not switch with index %d rate mask %x\n", | |
1006 | rate, rate_mask); | |
1007 | return -1; | |
1008 | } | |
1009 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
1010 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
1011 | tbl->current_rate.rate_n_flags, is_green); | |
1012 | ||
1013 | #endif /*CONFIG_IWLWIFI_HT */ | |
1014 | return rc; | |
1015 | } | |
1016 | ||
1017 | static int rs_move_legacy_other(struct iwl_priv *priv, | |
1018 | struct iwl_rate_scale_priv *lq_data, | |
1019 | int index) | |
1020 | { | |
1021 | int rc = 0; | |
1022 | struct iwl_scale_tbl_info *tbl = | |
1023 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1024 | struct iwl_scale_tbl_info *search_tbl = | |
1025 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1026 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1027 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1028 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1029 | u8 start_action = tbl->action; | |
1030 | ||
1031 | for (; ;) { | |
1032 | switch (tbl->action) { | |
1033 | case IWL_LEGACY_SWITCH_ANTENNA: | |
1034 | IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); | |
1035 | ||
1036 | search_tbl->lq_type = LQ_NONE; | |
1037 | lq_data->action_counter++; | |
1038 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1039 | break; | |
1040 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1041 | tbl->antenna_type)) | |
1042 | break; | |
1043 | ||
1044 | memcpy(search_tbl, tbl, sz); | |
1045 | ||
1046 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1047 | search_tbl); | |
1048 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1049 | lq_data->search_better_tbl = 1; | |
1050 | goto out; | |
1051 | ||
1052 | case IWL_LEGACY_SWITCH_SISO: | |
1053 | IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); | |
1054 | memcpy(search_tbl, tbl, sz); | |
1055 | search_tbl->lq_type = LQ_SISO; | |
1056 | search_tbl->is_SGI = 0; | |
1057 | search_tbl->is_fat = 0; | |
1058 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, | |
1059 | index); | |
1060 | if (!rc) { | |
1061 | lq_data->search_better_tbl = 1; | |
1062 | lq_data->action_counter = 0; | |
1063 | } | |
1064 | if (!rc) | |
1065 | goto out; | |
1066 | ||
1067 | break; | |
1068 | case IWL_LEGACY_SWITCH_MIMO: | |
1069 | IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); | |
1070 | memcpy(search_tbl, tbl, sz); | |
1071 | search_tbl->lq_type = LQ_MIMO; | |
1072 | search_tbl->is_SGI = 0; | |
1073 | search_tbl->is_fat = 0; | |
1074 | search_tbl->antenna_type = ANT_BOTH; | |
1075 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, | |
1076 | index); | |
1077 | if (!rc) { | |
1078 | lq_data->search_better_tbl = 1; | |
1079 | lq_data->action_counter = 0; | |
1080 | } | |
1081 | if (!rc) | |
1082 | goto out; | |
1083 | break; | |
1084 | } | |
1085 | tbl->action++; | |
1086 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1087 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1088 | ||
1089 | if (tbl->action == start_action) | |
1090 | break; | |
1091 | ||
1092 | } | |
1093 | return 0; | |
1094 | ||
1095 | out: | |
1096 | tbl->action++; | |
1097 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1098 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1099 | return 0; | |
1100 | ||
1101 | } | |
1102 | ||
1103 | static int rs_move_siso_to_other(struct iwl_priv *priv, | |
1104 | struct iwl_rate_scale_priv *lq_data, | |
1105 | int index) | |
1106 | { | |
1107 | int rc = -1; | |
1108 | u8 is_green = lq_data->is_green; | |
1109 | struct iwl_scale_tbl_info *tbl = | |
1110 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1111 | struct iwl_scale_tbl_info *search_tbl = | |
1112 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1113 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1114 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1115 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1116 | u8 start_action = tbl->action; | |
1117 | ||
1118 | for (;;) { | |
1119 | lq_data->action_counter++; | |
1120 | switch (tbl->action) { | |
1121 | case IWL_SISO_SWITCH_ANTENNA: | |
1122 | IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n"); | |
1123 | search_tbl->lq_type = LQ_NONE; | |
1124 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1125 | break; | |
1126 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1127 | tbl->antenna_type)) | |
1128 | break; | |
1129 | ||
1130 | memcpy(search_tbl, tbl, sz); | |
1131 | search_tbl->action = IWL_SISO_SWITCH_MIMO; | |
1132 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1133 | search_tbl); | |
1134 | lq_data->search_better_tbl = 1; | |
1135 | ||
1136 | goto out; | |
1137 | ||
1138 | case IWL_SISO_SWITCH_MIMO: | |
1139 | IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n"); | |
1140 | memcpy(search_tbl, tbl, sz); | |
1141 | search_tbl->lq_type = LQ_MIMO; | |
1142 | search_tbl->is_SGI = 0; | |
1143 | search_tbl->is_fat = 0; | |
1144 | search_tbl->antenna_type = ANT_BOTH; | |
1145 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, | |
1146 | index); | |
1147 | if (!rc) | |
1148 | lq_data->search_better_tbl = 1; | |
1149 | ||
1150 | if (!rc) | |
1151 | goto out; | |
1152 | break; | |
1153 | case IWL_SISO_SWITCH_GI: | |
1154 | IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); | |
1155 | memcpy(search_tbl, tbl, sz); | |
1156 | search_tbl->action = 0; | |
1157 | if (search_tbl->is_SGI) | |
1158 | search_tbl->is_SGI = 0; | |
1159 | else if (!is_green) | |
1160 | search_tbl->is_SGI = 1; | |
1161 | else | |
1162 | break; | |
1163 | lq_data->search_better_tbl = 1; | |
1164 | if ((tbl->lq_type == LQ_SISO) && | |
1165 | (tbl->is_SGI)) { | |
1166 | s32 tpt = lq_data->last_tpt / 100; | |
1167 | if (((!tbl->is_fat) && | |
1168 | (tpt >= expected_tpt_siso20MHz[index])) || | |
1169 | ((tbl->is_fat) && | |
1170 | (tpt >= expected_tpt_siso40MHz[index]))) | |
1171 | lq_data->search_better_tbl = 0; | |
1172 | } | |
1173 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1174 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1175 | search_tbl, index, is_green); | |
1176 | goto out; | |
1177 | } | |
1178 | tbl->action++; | |
1179 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1180 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1181 | ||
1182 | if (tbl->action == start_action) | |
1183 | break; | |
1184 | } | |
1185 | return 0; | |
1186 | ||
1187 | out: | |
1188 | tbl->action++; | |
1189 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1190 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | static int rs_move_mimo_to_other(struct iwl_priv *priv, | |
1195 | struct iwl_rate_scale_priv *lq_data, | |
1196 | int index) | |
1197 | { | |
1198 | int rc = -1; | |
1199 | s8 is_green = lq_data->is_green; | |
1200 | struct iwl_scale_tbl_info *tbl = | |
1201 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1202 | struct iwl_scale_tbl_info *search_tbl = | |
1203 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1204 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1205 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1206 | u8 start_action = tbl->action; | |
1207 | ||
1208 | for (;;) { | |
1209 | lq_data->action_counter++; | |
1210 | switch (tbl->action) { | |
1211 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1212 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
1213 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n"); | |
1214 | memcpy(search_tbl, tbl, sz); | |
1215 | search_tbl->lq_type = LQ_SISO; | |
1216 | search_tbl->is_SGI = 0; | |
1217 | search_tbl->is_fat = 0; | |
1218 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) | |
1219 | search_tbl->antenna_type = ANT_MAIN; | |
1220 | else | |
1221 | search_tbl->antenna_type = ANT_AUX; | |
1222 | ||
1223 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, | |
1224 | index); | |
1225 | if (!rc) { | |
1226 | lq_data->search_better_tbl = 1; | |
1227 | goto out; | |
1228 | } | |
1229 | break; | |
1230 | ||
1231 | case IWL_MIMO_SWITCH_GI: | |
1232 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); | |
1233 | memcpy(search_tbl, tbl, sz); | |
1234 | search_tbl->lq_type = LQ_MIMO; | |
1235 | search_tbl->antenna_type = ANT_BOTH; | |
1236 | search_tbl->action = 0; | |
1237 | if (search_tbl->is_SGI) | |
1238 | search_tbl->is_SGI = 0; | |
1239 | else | |
1240 | search_tbl->is_SGI = 1; | |
1241 | lq_data->search_better_tbl = 1; | |
1242 | if ((tbl->lq_type == LQ_MIMO) && | |
1243 | (tbl->is_SGI)) { | |
1244 | s32 tpt = lq_data->last_tpt / 100; | |
1245 | if (((!tbl->is_fat) && | |
1246 | (tpt >= expected_tpt_mimo20MHz[index])) || | |
1247 | ((tbl->is_fat) && | |
1248 | (tpt >= expected_tpt_mimo40MHz[index]))) | |
1249 | lq_data->search_better_tbl = 0; | |
1250 | } | |
1251 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1252 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1253 | search_tbl, index, is_green); | |
1254 | goto out; | |
1255 | ||
1256 | } | |
1257 | tbl->action++; | |
1258 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1259 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1260 | ||
1261 | if (tbl->action == start_action) | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | return 0; | |
1266 | out: | |
1267 | tbl->action++; | |
1268 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1269 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1270 | return 0; | |
1271 | ||
1272 | } | |
1273 | ||
1274 | static void rs_stay_in_table(struct iwl_rate_scale_priv *lq_data) | |
1275 | { | |
1276 | struct iwl_scale_tbl_info *tbl; | |
1277 | int i; | |
1278 | int active_tbl; | |
1279 | int flush_interval_passed = 0; | |
1280 | ||
1281 | active_tbl = lq_data->active_tbl; | |
1282 | ||
1283 | tbl = &(lq_data->lq_info[active_tbl]); | |
1284 | ||
1285 | if (lq_data->stay_in_tbl) { | |
1286 | ||
1287 | if (lq_data->flush_timer) | |
1288 | flush_interval_passed = | |
1289 | time_after(jiffies, | |
1290 | (unsigned long)(lq_data->flush_timer + | |
1291 | IWL_RATE_SCALE_FLUSH_INTVL)); | |
1292 | ||
1293 | flush_interval_passed = 0; | |
1294 | if ((lq_data->total_failed > lq_data->max_failure_limit) || | |
1295 | (lq_data->total_success > lq_data->max_success_limit) || | |
1296 | ((!lq_data->search_better_tbl) && (lq_data->flush_timer) | |
1297 | && (flush_interval_passed))) { | |
1298 | IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:", | |
1299 | lq_data->total_failed, | |
1300 | lq_data->total_success, | |
1301 | flush_interval_passed); | |
1302 | lq_data->stay_in_tbl = 0; | |
1303 | lq_data->total_failed = 0; | |
1304 | lq_data->total_success = 0; | |
1305 | lq_data->flush_timer = 0; | |
1306 | } else if (lq_data->table_count > 0) { | |
1307 | lq_data->table_count++; | |
1308 | if (lq_data->table_count >= | |
1309 | lq_data->table_count_limit) { | |
1310 | lq_data->table_count = 0; | |
1311 | ||
1312 | IWL_DEBUG_HT("LQ: stay in table clear win\n"); | |
1313 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1314 | rs_rate_scale_clear_window( | |
1315 | &(tbl->win[i])); | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | if (!lq_data->stay_in_tbl) { | |
1320 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1321 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1322 | } | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | static void rs_rate_scale_perform(struct iwl_priv *priv, | |
1327 | struct net_device *dev, | |
1328 | struct ieee80211_hdr *hdr, | |
1329 | struct sta_info *sta) | |
1330 | { | |
1331 | int low = IWL_RATE_INVALID; | |
1332 | int high = IWL_RATE_INVALID; | |
1333 | int index; | |
1334 | int i; | |
1335 | struct iwl_rate_scale_data *window = NULL; | |
1336 | int current_tpt = IWL_INVALID_VALUE; | |
1337 | int low_tpt = IWL_INVALID_VALUE; | |
1338 | int high_tpt = IWL_INVALID_VALUE; | |
1339 | u32 fail_count; | |
1340 | s8 scale_action = 0; | |
1341 | u16 fc, rate_mask; | |
1342 | u8 update_lq = 0; | |
1343 | struct iwl_rate_scale_priv *lq_data; | |
1344 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
1345 | u16 rate_scale_index_msk = 0; | |
1346 | struct iwl_rate mcs_rate; | |
1347 | u8 is_green = 0; | |
1348 | u8 active_tbl = 0; | |
1349 | u8 done_search = 0; | |
1350 | u16 high_low; | |
1351 | ||
1352 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1353 | ||
1354 | fc = le16_to_cpu(hdr->frame_control); | |
1355 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1356 | /* Send management frames and broadcast/multicast data using | |
1357 | * lowest rate. */ | |
1358 | /* TODO: this could probably be improved.. */ | |
1359 | return; | |
1360 | } | |
1361 | ||
1362 | if (!sta || !sta->rate_ctrl_priv) | |
1363 | return; | |
1364 | ||
1365 | if (!priv->lq_mngr.lq_ready) { | |
1366 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1367 | return; | |
1368 | } | |
1369 | lq_data = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1370 | ||
1371 | if (!lq_data->search_better_tbl) | |
1372 | active_tbl = lq_data->active_tbl; | |
1373 | else | |
1374 | active_tbl = 1 - lq_data->active_tbl; | |
1375 | ||
1376 | tbl = &(lq_data->lq_info[active_tbl]); | |
1377 | is_green = lq_data->is_green; | |
1378 | ||
1379 | index = sta->last_txrate; | |
1380 | ||
1381 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1382 | tbl->lq_type); | |
1383 | ||
1384 | rs_get_supported_rates(lq_data, hdr, tbl->lq_type, | |
1385 | &rate_mask); | |
1386 | ||
1387 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1388 | ||
1389 | /* mask with station rate restriction */ | |
1390 | if (is_legacy(tbl->lq_type)) { | |
1391 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1392 | rate_scale_index_msk = (u16) (rate_mask & | |
02dede04 | 1393 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1394 | else |
1395 | rate_scale_index_msk = (u16) (rate_mask & | |
02dede04 | 1396 | lq_data->supp_rates); |
b481de9c ZY |
1397 | |
1398 | } else | |
1399 | rate_scale_index_msk = rate_mask; | |
1400 | ||
1401 | if (!rate_scale_index_msk) | |
1402 | rate_scale_index_msk = rate_mask; | |
1403 | ||
1404 | if (index < 0 || !((1 << index) & rate_scale_index_msk)) { | |
1405 | index = IWL_INVALID_VALUE; | |
1406 | update_lq = 1; | |
1407 | ||
1408 | /* get the lowest availabe rate */ | |
1409 | for (i = 0; i <= IWL_RATE_COUNT; i++) { | |
1410 | if ((1 << i) & rate_scale_index_msk) | |
1411 | index = i; | |
1412 | } | |
1413 | ||
1414 | if (index == IWL_INVALID_VALUE) { | |
1415 | IWL_WARNING("Can not find a suitable rate\n"); | |
1416 | return; | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | if (!tbl->expected_tpt) | |
1421 | rs_get_expected_tpt_table(lq_data, tbl); | |
1422 | ||
1423 | window = &(tbl->win[index]); | |
1424 | ||
1425 | fail_count = window->counter - window->success_counter; | |
1426 | if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && | |
1427 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) | |
1428 | || (tbl->expected_tpt == NULL)) { | |
1429 | IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " | |
1430 | "for index %d\n", | |
1431 | window->success_counter, window->counter, index); | |
1432 | window->average_tpt = IWL_INVALID_VALUE; | |
1433 | rs_stay_in_table(lq_data); | |
1434 | if (update_lq) { | |
1435 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
02dede04 | 1436 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
b481de9c ZY |
1437 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1438 | } | |
1439 | goto out; | |
1440 | ||
1441 | } else | |
1442 | window->average_tpt = ((window->success_ratio * | |
1443 | tbl->expected_tpt[index] + 64) / 128); | |
1444 | ||
1445 | if (lq_data->search_better_tbl) { | |
1446 | int success_limit = IWL_RATE_SCALE_SWITCH; | |
1447 | ||
1448 | if ((window->success_ratio > success_limit) || | |
1449 | (window->average_tpt > lq_data->last_tpt)) { | |
1450 | if (!is_legacy(tbl->lq_type)) { | |
1451 | IWL_DEBUG_HT("LQ: we are switching to HT" | |
1452 | " rate suc %d current tpt %d" | |
1453 | " old tpt %d\n", | |
1454 | window->success_ratio, | |
1455 | window->average_tpt, | |
1456 | lq_data->last_tpt); | |
1457 | lq_data->enable_counter = 1; | |
1458 | } | |
1459 | lq_data->active_tbl = active_tbl; | |
1460 | current_tpt = window->average_tpt; | |
1461 | } else { | |
1462 | tbl->lq_type = LQ_NONE; | |
1463 | active_tbl = lq_data->active_tbl; | |
1464 | tbl = &(lq_data->lq_info[active_tbl]); | |
1465 | ||
1466 | index = iwl_rate_index_from_plcp( | |
1467 | tbl->current_rate.rate_n_flags); | |
1468 | ||
1469 | update_lq = 1; | |
1470 | current_tpt = lq_data->last_tpt; | |
1471 | IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n"); | |
1472 | } | |
1473 | lq_data->search_better_tbl = 0; | |
1474 | done_search = 1; | |
1475 | goto lq_update; | |
1476 | } | |
1477 | ||
1478 | high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, | |
1479 | tbl->lq_type); | |
1480 | low = high_low & 0xff; | |
1481 | high = (high_low >> 8) & 0xff; | |
1482 | ||
1483 | current_tpt = window->average_tpt; | |
1484 | ||
1485 | if (low != IWL_RATE_INVALID) | |
1486 | low_tpt = tbl->win[low].average_tpt; | |
1487 | ||
1488 | if (high != IWL_RATE_INVALID) | |
1489 | high_tpt = tbl->win[high].average_tpt; | |
1490 | ||
1491 | ||
1492 | scale_action = 1; | |
1493 | ||
1494 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || | |
1495 | (current_tpt == 0)) { | |
1496 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); | |
1497 | scale_action = -1; | |
1498 | } else if ((low_tpt == IWL_INVALID_VALUE) && | |
1499 | (high_tpt == IWL_INVALID_VALUE)) | |
1500 | scale_action = 1; | |
1501 | else if ((low_tpt != IWL_INVALID_VALUE) && | |
1502 | (high_tpt != IWL_INVALID_VALUE) && | |
1503 | (low_tpt < current_tpt) && | |
1504 | (high_tpt < current_tpt)) | |
1505 | scale_action = 0; | |
1506 | else { | |
1507 | if (high_tpt != IWL_INVALID_VALUE) { | |
1508 | if (high_tpt > current_tpt) | |
1509 | scale_action = 1; | |
1510 | else { | |
1511 | IWL_DEBUG_RATE | |
1512 | ("decrease rate because of high tpt\n"); | |
1513 | scale_action = -1; | |
1514 | } | |
1515 | } else if (low_tpt != IWL_INVALID_VALUE) { | |
1516 | if (low_tpt > current_tpt) { | |
1517 | IWL_DEBUG_RATE | |
1518 | ("decrease rate because of low tpt\n"); | |
1519 | scale_action = -1; | |
1520 | } else | |
1521 | scale_action = 1; | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | if (scale_action == -1) { | |
1526 | if ((low != IWL_RATE_INVALID) && | |
1527 | ((window->success_ratio > IWL_RATE_HIGH_TH) || | |
1528 | (current_tpt > (100 * tbl->expected_tpt[low])))) | |
1529 | scale_action = 0; | |
1530 | } else if ((scale_action == 1) && | |
1531 | (window->success_ratio < IWL_RATE_INCREASE_TH)) | |
1532 | scale_action = 0; | |
1533 | ||
1534 | switch (scale_action) { | |
1535 | case -1: | |
1536 | if (low != IWL_RATE_INVALID) { | |
1537 | update_lq = 1; | |
1538 | index = low; | |
1539 | } | |
1540 | break; | |
1541 | case 1: | |
1542 | if (high != IWL_RATE_INVALID) { | |
1543 | update_lq = 1; | |
1544 | index = high; | |
1545 | } | |
1546 | ||
1547 | break; | |
1548 | case 0: | |
1549 | default: | |
1550 | break; | |
1551 | } | |
1552 | ||
1553 | IWL_DEBUG_HT("choose rate scale index %d action %d low %d " | |
1554 | "high %d type %d\n", | |
1555 | index, scale_action, low, high, tbl->lq_type); | |
1556 | ||
1557 | lq_update: | |
1558 | if (update_lq) { | |
1559 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
02dede04 | 1560 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
b481de9c ZY |
1561 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1562 | } | |
1563 | rs_stay_in_table(lq_data); | |
1564 | ||
1565 | if (!update_lq && !done_search && !lq_data->stay_in_tbl) { | |
1566 | lq_data->last_tpt = current_tpt; | |
1567 | ||
1568 | if (is_legacy(tbl->lq_type)) | |
1569 | rs_move_legacy_other(priv, lq_data, index); | |
1570 | else if (is_siso(tbl->lq_type)) | |
1571 | rs_move_siso_to_other(priv, lq_data, index); | |
1572 | else | |
1573 | rs_move_mimo_to_other(priv, lq_data, index); | |
1574 | ||
1575 | if (lq_data->search_better_tbl) { | |
1576 | tbl = &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1577 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1578 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1579 | ||
1580 | index = iwl_rate_index_from_plcp( | |
1581 | tbl->current_rate.rate_n_flags); | |
1582 | ||
1583 | IWL_DEBUG_HT("Switch current mcs: %X index: %d\n", | |
1584 | tbl->current_rate.rate_n_flags, index); | |
1585 | rs_fill_link_cmd(lq_data, &tbl->current_rate, | |
02dede04 | 1586 | &lq_data->lq); |
b481de9c ZY |
1587 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1588 | } | |
1589 | tbl1 = &(lq_data->lq_info[lq_data->active_tbl]); | |
1590 | ||
1591 | if (is_legacy(tbl1->lq_type) && | |
1592 | #ifdef CONFIG_IWLWIFI_HT | |
1593 | !priv->current_assoc_ht.is_ht && | |
1594 | #endif | |
1595 | (lq_data->action_counter >= 1)) { | |
1596 | lq_data->action_counter = 0; | |
1597 | IWL_DEBUG_HT("LQ: STAY in legacy table\n"); | |
1598 | rs_set_stay_in_table(1, lq_data); | |
1599 | } | |
1600 | ||
1601 | if (lq_data->enable_counter && | |
1602 | (lq_data->action_counter >= IWL_ACTION_LIMIT)) { | |
1603 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
1604 | if ((lq_data->last_tpt > TID_AGG_TPT_THREHOLD) && | |
1605 | (priv->lq_mngr.agg_ctrl.auto_agg)) { | |
1606 | priv->lq_mngr.agg_ctrl.tid_retry = | |
1607 | TID_ALL_SPECIFIED; | |
1608 | schedule_work(&priv->agg_work); | |
1609 | } | |
1610 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
1611 | lq_data->action_counter = 0; | |
1612 | rs_set_stay_in_table(0, lq_data); | |
1613 | } | |
1614 | } else { | |
1615 | if ((!update_lq) && (!done_search) && (!lq_data->flush_timer)) | |
1616 | lq_data->flush_timer = jiffies; | |
1617 | } | |
1618 | ||
1619 | out: | |
1620 | rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green); | |
1621 | i = index; | |
1622 | sta->last_txrate = i; | |
1623 | ||
1624 | /* sta->txrate is an index to A mode rates which start | |
1625 | * at IWL_FIRST_OFDM_RATE | |
1626 | */ | |
1627 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1628 | sta->txrate = i - IWL_FIRST_OFDM_RATE; | |
1629 | else | |
1630 | sta->txrate = i; | |
1631 | ||
1632 | return; | |
1633 | } | |
1634 | ||
1635 | ||
1636 | static void rs_initialize_lq(struct iwl_priv *priv, | |
1637 | struct sta_info *sta) | |
1638 | { | |
1639 | int i; | |
1640 | struct iwl_rate_scale_priv *lq; | |
1641 | struct iwl_scale_tbl_info *tbl; | |
1642 | u8 active_tbl = 0; | |
1643 | int rate_idx; | |
1644 | u8 use_green = rs_use_green(priv); | |
1645 | struct iwl_rate mcs_rate; | |
1646 | ||
1647 | if (!sta || !sta->rate_ctrl_priv) | |
1648 | goto out; | |
1649 | ||
1650 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1651 | i = sta->last_txrate; | |
1652 | ||
1653 | if ((lq->lq.sta_id == 0xff) && | |
1654 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
1655 | goto out; | |
1656 | ||
1657 | if (!lq->search_better_tbl) | |
1658 | active_tbl = lq->active_tbl; | |
1659 | else | |
1660 | active_tbl = 1 - lq->active_tbl; | |
1661 | ||
1662 | tbl = &(lq->lq_info[active_tbl]); | |
1663 | ||
1664 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
1665 | i = 0; | |
1666 | ||
1667 | mcs_rate.rate_n_flags = iwl_rates[i].plcp ; | |
1668 | mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
1669 | mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
1670 | ||
1671 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
1672 | mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK; | |
1673 | ||
1674 | tbl->antenna_type = ANT_AUX; | |
1675 | rs_get_tbl_info_from_mcs(&mcs_rate, priv->phymode, tbl, &rate_idx); | |
1676 | if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type)) | |
46640a8c | 1677 | rs_toggle_antenna(&mcs_rate, tbl); |
b481de9c ZY |
1678 | |
1679 | rs_mcs_from_tbl(&mcs_rate, tbl, rate_idx, use_green); | |
1680 | tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags; | |
1681 | rs_get_expected_tpt_table(lq, tbl); | |
02dede04 | 1682 | rs_fill_link_cmd(lq, &mcs_rate, &lq->lq); |
b481de9c ZY |
1683 | rs_send_lq_cmd(priv, &lq->lq, CMD_ASYNC); |
1684 | out: | |
1685 | return; | |
1686 | } | |
1687 | ||
1688 | static struct ieee80211_rate *rs_get_lowest_rate(struct ieee80211_local | |
1689 | *local) | |
1690 | { | |
1691 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; | |
1692 | int i; | |
1693 | ||
1694 | for (i = 0; i < mode->num_rates; i++) { | |
1695 | struct ieee80211_rate *rate = &mode->rates[i]; | |
1696 | ||
1697 | if (rate->flags & IEEE80211_RATE_SUPPORTED) | |
1698 | return rate; | |
1699 | } | |
1700 | ||
1701 | return &mode->rates[0]; | |
1702 | } | |
1703 | ||
1704 | static struct ieee80211_rate *rs_get_rate(void *priv_rate, | |
1705 | struct net_device *dev, | |
1706 | struct sk_buff *skb, | |
1707 | struct rate_control_extra | |
1708 | *extra) | |
1709 | { | |
1710 | ||
1711 | int i; | |
1712 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1713 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1714 | struct sta_info *sta; | |
1715 | u16 fc; | |
1716 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
1717 | struct iwl_rate_scale_priv *lq; | |
1718 | ||
58826351 | 1719 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c ZY |
1720 | |
1721 | memset(extra, 0, sizeof(*extra)); | |
1722 | ||
1723 | fc = le16_to_cpu(hdr->frame_control); | |
1724 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1725 | /* Send management frames and broadcast/multicast data using | |
1726 | * lowest rate. */ | |
1727 | /* TODO: this could probably be improved.. */ | |
1728 | return rs_get_lowest_rate(local); | |
1729 | } | |
1730 | ||
1731 | sta = sta_info_get(local, hdr->addr1); | |
1732 | ||
1733 | if (!sta || !sta->rate_ctrl_priv) { | |
1734 | if (sta) | |
1735 | sta_info_put(sta); | |
1736 | return rs_get_lowest_rate(local); | |
1737 | } | |
1738 | ||
1739 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1740 | i = sta->last_txrate; | |
1741 | ||
1742 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) { | |
1743 | u8 sta_id = iwl_hw_find_station(priv, hdr->addr1); | |
0795af57 | 1744 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
1745 | |
1746 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1747 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1748 | print_mac(mac, hdr->addr1)); | |
b481de9c ZY |
1749 | sta_id = iwl_add_station(priv, |
1750 | hdr->addr1, 0, CMD_ASYNC); | |
1751 | } | |
1752 | if ((sta_id != IWL_INVALID_STATION)) { | |
1753 | lq->lq.sta_id = sta_id; | |
1754 | lq->lq.rs_table[0].rate_n_flags = 0; | |
1755 | lq->ibss_sta_added = 1; | |
1756 | rs_initialize_lq(priv, sta); | |
1757 | } | |
1758 | if (!lq->ibss_sta_added) | |
1759 | goto done; | |
1760 | } | |
1761 | ||
1762 | done: | |
1763 | sta_info_put(sta); | |
1764 | if ((i < 0) || (i > IWL_RATE_COUNT)) | |
1765 | return rs_get_lowest_rate(local); | |
1766 | ||
1767 | return &priv->ieee_rates[i]; | |
1768 | } | |
1769 | ||
1770 | static void *rs_alloc_sta(void *priv, gfp_t gfp) | |
1771 | { | |
1772 | struct iwl_rate_scale_priv *crl; | |
1773 | int i, j; | |
1774 | ||
1775 | IWL_DEBUG_RATE("create station rate scale window\n"); | |
1776 | ||
1777 | crl = kzalloc(sizeof(struct iwl_rate_scale_priv), gfp); | |
1778 | ||
1779 | if (crl == NULL) | |
1780 | return NULL; | |
b481de9c ZY |
1781 | crl->lq.sta_id = 0xff; |
1782 | ||
63fddb9f | 1783 | |
b481de9c ZY |
1784 | for (j = 0; j < LQ_SIZE; j++) |
1785 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1786 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1787 | ||
1788 | return crl; | |
1789 | } | |
1790 | ||
1791 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
1792 | struct ieee80211_local *local, | |
1793 | struct sta_info *sta) | |
1794 | { | |
1795 | int i, j; | |
1796 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; | |
1797 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
1798 | struct iwl_rate_scale_priv *crl = priv_sta; | |
1799 | ||
b481de9c | 1800 | crl->flush_timer = 0; |
02dede04 | 1801 | crl->supp_rates = sta->supp_rates; |
b481de9c ZY |
1802 | sta->txrate = 3; |
1803 | for (j = 0; j < LQ_SIZE; j++) | |
1804 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1805 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1806 | ||
1807 | IWL_DEBUG_RATE("rate scale global init\n"); | |
1808 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
1809 | * the lowest or the highest rate.. Could consider using RSSI from | |
1810 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
1811 | * after assoc.. */ | |
1812 | ||
1813 | crl->ibss_sta_added = 0; | |
1814 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { | |
1815 | u8 sta_id = iwl_hw_find_station(priv, sta->addr); | |
0795af57 JP |
1816 | DECLARE_MAC_BUF(mac); |
1817 | ||
b481de9c | 1818 | /* for IBSS the call are from tasklet */ |
0795af57 JP |
1819 | IWL_DEBUG_HT("LQ: ADD station %s\n", |
1820 | print_mac(mac, sta->addr)); | |
b481de9c ZY |
1821 | |
1822 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1823 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1824 | print_mac(mac, sta->addr)); | |
1825 | sta_id = iwl_add_station(priv, | |
b481de9c ZY |
1826 | sta->addr, 0, CMD_ASYNC); |
1827 | } | |
1828 | if ((sta_id != IWL_INVALID_STATION)) { | |
1829 | crl->lq.sta_id = sta_id; | |
1830 | crl->lq.rs_table[0].rate_n_flags = 0; | |
1831 | } | |
1832 | /* FIXME: this is w/a remove it later */ | |
1833 | priv->assoc_station_added = 1; | |
1834 | } | |
1835 | ||
1836 | for (i = 0; i < mode->num_rates; i++) { | |
1837 | if ((sta->supp_rates & BIT(i)) && | |
1838 | (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) | |
1839 | sta->txrate = i; | |
1840 | } | |
1841 | sta->last_txrate = sta->txrate; | |
1842 | /* For MODE_IEEE80211A mode cck rate are at end | |
1843 | * rate table | |
1844 | */ | |
1845 | if (local->hw.conf.phymode == MODE_IEEE80211A) | |
1846 | sta->last_txrate += IWL_FIRST_OFDM_RATE; | |
1847 | ||
1848 | crl->is_dup = priv->is_dup; | |
1849 | crl->valid_antenna = priv->valid_antenna; | |
1850 | crl->antenna = priv->antenna; | |
1851 | crl->is_green = rs_use_green(priv); | |
1852 | crl->active_rate = priv->active_rate; | |
1853 | crl->active_rate &= ~(0x1000); | |
1854 | crl->active_rate_basic = priv->active_rate_basic; | |
1855 | crl->phymode = priv->phymode; | |
1856 | #ifdef CONFIG_IWLWIFI_HT | |
1857 | crl->active_siso_rate = (priv->current_assoc_ht.supp_rates[0] << 1); | |
1858 | crl->active_siso_rate |= (priv->current_assoc_ht.supp_rates[0] & 0x1); | |
1859 | crl->active_siso_rate &= ~((u16)0x2); | |
1860 | crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE; | |
1861 | ||
1862 | crl->active_mimo_rate = (priv->current_assoc_ht.supp_rates[1] << 1); | |
1863 | crl->active_mimo_rate |= (priv->current_assoc_ht.supp_rates[1] & 0x1); | |
1864 | crl->active_mimo_rate &= ~((u16)0x2); | |
1865 | crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE; | |
1866 | IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, | |
1867 | crl->active_mimo_rate); | |
1868 | #endif /*CONFIG_IWLWIFI_HT*/ | |
1869 | ||
1870 | if (priv->assoc_station_added) | |
1871 | priv->lq_mngr.lq_ready = 1; | |
1872 | ||
1873 | rs_initialize_lq(priv, sta); | |
1874 | } | |
1875 | ||
1876 | static int rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, | |
1877 | struct iwl_rate *tx_mcs, | |
02dede04 | 1878 | struct iwl_link_quality_cmd *lq_cmd) |
b481de9c ZY |
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, | |
02dede04 | 1936 | use_ht_possible, &new_rate); |
b481de9c ZY |
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 | ||
93dc646a | 2004 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2005 | static int open_file_generic(struct inode *inode, struct file *file) |
2006 | { | |
2007 | file->private_data = inode->i_private; | |
2008 | return 0; | |
2009 | } | |
2010 | ||
2011 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, | |
2012 | char __user *user_buf, size_t count, loff_t *ppos) | |
2013 | { | |
2014 | char buff[1024]; | |
2015 | int desc = 0; | |
2016 | int i = 0; | |
2017 | ||
2018 | struct iwl_rate_scale_priv *rs_priv = file->private_data; | |
2019 | ||
2020 | desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id); | |
2021 | desc += sprintf(buff+desc, "failed=%d success=%d rate=%X\n", | |
2022 | rs_priv->total_failed, rs_priv->total_success, | |
2023 | rs_priv->active_rate); | |
2024 | desc += sprintf(buff+desc, "general:" | |
2025 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
2026 | rs_priv->lq.general_params.flags, | |
2027 | rs_priv->lq.general_params.mimo_delimiter, | |
2028 | rs_priv->lq.general_params.single_stream_ant_msk, | |
2029 | rs_priv->lq.general_params.dual_stream_ant_msk); | |
2030 | ||
2031 | desc += sprintf(buff+desc, "agg:" | |
2032 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2033 | le16_to_cpu(rs_priv->lq.agg_params.agg_time_limit), | |
2034 | rs_priv->lq.agg_params.agg_dis_start_th, | |
2035 | rs_priv->lq.agg_params.agg_frame_cnt_limit); | |
2036 | ||
2037 | desc += sprintf(buff+desc, | |
2038 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2039 | rs_priv->lq.general_params.start_rate_index[0], | |
2040 | rs_priv->lq.general_params.start_rate_index[1], | |
2041 | rs_priv->lq.general_params.start_rate_index[2], | |
2042 | rs_priv->lq.general_params.start_rate_index[3]); | |
2043 | ||
2044 | ||
2045 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2046 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
2047 | i, le32_to_cpu(rs_priv->lq.rs_table[i].rate_n_flags)); | |
2048 | ||
2049 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2050 | } | |
2051 | ||
2052 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
2053 | .read = rs_sta_dbgfs_scale_table_read, | |
2054 | .open = open_file_generic, | |
2055 | }; | |
2056 | ||
93dc646a ZY |
2057 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2058 | struct dentry *dir) | |
2059 | { | |
5ae212c9 ZY |
2060 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
2061 | rs_priv->rs_sta_dbgfs_scale_table_file = | |
2062 | debugfs_create_file("rate_scale_table", 0444, dir, | |
2063 | rs_priv, &rs_sta_dbgfs_scale_table_ops); | |
93dc646a ZY |
2064 | } |
2065 | ||
2066 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2067 | { | |
5ae212c9 ZY |
2068 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
2069 | debugfs_remove(rs_priv->rs_sta_dbgfs_scale_table_file); | |
93dc646a ZY |
2070 | } |
2071 | #endif | |
2072 | ||
b481de9c ZY |
2073 | static struct rate_control_ops rs_ops = { |
2074 | .module = NULL, | |
2075 | .name = RS_NAME, | |
2076 | .tx_status = rs_tx_status, | |
2077 | .get_rate = rs_get_rate, | |
2078 | .rate_init = rs_rate_init, | |
2079 | .clear = rs_clear, | |
2080 | .alloc = rs_alloc, | |
2081 | .free = rs_free, | |
2082 | .alloc_sta = rs_alloc_sta, | |
2083 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2084 | #ifdef CONFIG_MAC80211_DEBUGFS |
2085 | .add_sta_debugfs = rs_add_debugfs, | |
2086 | .remove_sta_debugfs = rs_remove_debugfs, | |
2087 | #endif | |
b481de9c ZY |
2088 | }; |
2089 | ||
2090 | int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) | |
2091 | { | |
2092 | struct ieee80211_local *local = hw_to_local(hw); | |
2093 | struct iwl_priv *priv = hw->priv; | |
2094 | struct iwl_rate_scale_priv *rs_priv; | |
2095 | struct sta_info *sta; | |
2096 | int count = 0, i; | |
2097 | u32 samples = 0, success = 0, good = 0; | |
2098 | unsigned long now = jiffies; | |
2099 | u32 max_time = 0; | |
2100 | u8 lq_type, antenna; | |
2101 | ||
2102 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); | |
2103 | if (!sta || !sta->rate_ctrl_priv) { | |
2104 | if (sta) { | |
2105 | sta_info_put(sta); | |
2106 | IWL_DEBUG_RATE("leave - no private rate data!\n"); | |
2107 | } else | |
2108 | IWL_DEBUG_RATE("leave - no station!\n"); | |
2109 | return sprintf(buf, "station %d not found\n", sta_id); | |
2110 | } | |
2111 | ||
2112 | rs_priv = (void *)sta->rate_ctrl_priv; | |
2113 | ||
2114 | lq_type = rs_priv->lq_info[rs_priv->active_tbl].lq_type; | |
2115 | antenna = rs_priv->lq_info[rs_priv->active_tbl].antenna_type; | |
2116 | ||
2117 | if (is_legacy(lq_type)) | |
2118 | i = IWL_RATE_54M_INDEX; | |
2119 | else | |
2120 | i = IWL_RATE_60M_INDEX; | |
2121 | while (1) { | |
2122 | u64 mask; | |
2123 | int j; | |
2124 | int active = rs_priv->active_tbl; | |
2125 | ||
2126 | count += | |
2127 | sprintf(&buf[count], " %2dMbs: ", iwl_rates[i].ieee / 2); | |
2128 | ||
2129 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2130 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
2131 | buf[count++] = | |
2132 | (rs_priv->lq_info[active].win[i].data & mask) | |
2133 | ? '1' : '0'; | |
2134 | ||
2135 | samples += rs_priv->lq_info[active].win[i].counter; | |
2136 | good += rs_priv->lq_info[active].win[i].success_counter; | |
2137 | success += rs_priv->lq_info[active].win[i].success_counter * | |
2138 | iwl_rates[i].ieee; | |
2139 | ||
2140 | if (rs_priv->lq_info[active].win[i].stamp) { | |
2141 | int delta = | |
2142 | jiffies_to_msecs(now - | |
2143 | rs_priv->lq_info[active].win[i].stamp); | |
2144 | ||
2145 | if (delta > max_time) | |
2146 | max_time = delta; | |
2147 | ||
2148 | count += sprintf(&buf[count], "%5dms\n", delta); | |
2149 | } else | |
2150 | buf[count++] = '\n'; | |
2151 | ||
2152 | j = iwl_get_prev_ieee_rate(i); | |
2153 | if (j == i) | |
2154 | break; | |
2155 | i = j; | |
2156 | } | |
2157 | ||
2158 | /* Display the average rate of all samples taken. | |
2159 | * | |
2160 | * NOTE: We multiple # of samples by 2 since the IEEE measurement | |
2161 | * added from iwl_rates is actually 2X the rate */ | |
2162 | if (samples) | |
2163 | count += sprintf(&buf[count], | |
2164 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" | |
2165 | "%3d%% success (%d good packets over %d tries)\n", | |
2166 | success / (2 * samples), (success * 5 / samples) % 10, | |
2167 | max_time, good * 100 / samples, good, samples); | |
2168 | else | |
2169 | count += sprintf(&buf[count], "\nAverage rate: 0Mbs\n"); | |
2170 | count += sprintf(&buf[count], "\nrate scale type %d anntena %d " | |
2171 | "active_search %d rate index %d\n", lq_type, antenna, | |
2172 | rs_priv->search_better_tbl, sta->last_txrate); | |
2173 | ||
2174 | sta_info_put(sta); | |
2175 | return count; | |
2176 | } | |
2177 | ||
2178 | void iwl_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) | |
2179 | { | |
2180 | struct iwl_priv *priv = hw->priv; | |
2181 | ||
2182 | priv->lq_mngr.lq_ready = 1; | |
2183 | } | |
2184 | ||
2185 | void iwl_rate_control_register(struct ieee80211_hw *hw) | |
2186 | { | |
2187 | ieee80211_rate_control_register(&rs_ops); | |
2188 | } | |
2189 | ||
2190 | void iwl_rate_control_unregister(struct ieee80211_hw *hw) | |
2191 | { | |
2192 | ieee80211_rate_control_unregister(&rs_ops); | |
2193 | } | |
2194 |