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b481de9c ZY |
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 | ||
1156b2c6 ZY |
39 | #define IWL 4965 |
40 | ||
b481de9c ZY |
41 | #include "../net/mac80211/ieee80211_rate.h" |
42 | ||
43 | #include "iwlwifi.h" | |
44 | #include "iwl-helpers.h" | |
45 | ||
46 | #define RS_NAME "iwl-4965-rs" | |
47 | ||
48 | #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1 | |
49 | #define IWL_NUMBER_TRY 1 | |
50 | #define IWL_HT_NUMBER_TRY 3 | |
51 | ||
52 | #define IWL_RATE_MAX_WINDOW 62 | |
53 | #define IWL_RATE_HIGH_TH 10880 | |
54 | #define IWL_RATE_MIN_FAILURE_TH 6 | |
55 | #define IWL_RATE_MIN_SUCCESS_TH 8 | |
56 | #define IWL_RATE_DECREASE_TH 1920 | |
57 | #define IWL_RATE_INCREASE_TH 8960 | |
58 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) /*2 seconds */ | |
59 | ||
60 | static u8 rs_ht_to_legacy[] = { | |
61 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
62 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
63 | IWL_RATE_6M_INDEX, | |
64 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
65 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
66 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
67 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
68 | }; | |
69 | ||
70 | struct iwl_rate { | |
71 | u32 rate_n_flags; | |
72 | } __attribute__ ((packed)); | |
73 | ||
74 | struct iwl_rate_scale_data { | |
75 | u64 data; | |
76 | s32 success_counter; | |
77 | s32 success_ratio; | |
78 | s32 counter; | |
79 | s32 average_tpt; | |
80 | unsigned long stamp; | |
81 | }; | |
82 | ||
83 | struct iwl_scale_tbl_info { | |
84 | enum iwl_table_type lq_type; | |
85 | enum iwl_antenna_type antenna_type; | |
86 | u8 is_SGI; | |
87 | u8 is_fat; | |
88 | u8 is_dup; | |
89 | u8 action; | |
90 | s32 *expected_tpt; | |
91 | struct iwl_rate current_rate; | |
92 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; | |
93 | }; | |
94 | ||
95 | struct iwl_rate_scale_priv { | |
96 | u8 active_tbl; | |
97 | u8 enable_counter; | |
98 | u8 stay_in_tbl; | |
99 | u8 search_better_tbl; | |
100 | s32 last_tpt; | |
101 | u32 table_count_limit; | |
102 | u32 max_failure_limit; | |
103 | u32 max_success_limit; | |
104 | u32 table_count; | |
105 | u32 total_failed; | |
106 | u32 total_success; | |
107 | u32 flush_timer; | |
108 | u8 action_counter; | |
109 | u8 antenna; | |
110 | u8 valid_antenna; | |
111 | u8 is_green; | |
112 | u8 is_dup; | |
113 | u8 phymode; | |
114 | u8 ibss_sta_added; | |
02dede04 | 115 | u32 supp_rates; |
b481de9c ZY |
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]; | |
5ae212c9 | 122 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 123 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 124 | struct dentry *rs_sta_dbgfs_stats_table_file; |
98d7e09a ZY |
125 | struct iwl_rate dbg_fixed; |
126 | struct iwl_priv *drv; | |
5ae212c9 | 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); | |
1b696de2 | 134 | static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, |
b481de9c | 135 | struct iwl_rate *tx_mcs, |
02dede04 | 136 | struct iwl_link_quality_cmd *tbl); |
b481de9c ZY |
137 | |
138 | ||
98d7e09a ZY |
139 | #ifdef CONFIG_MAC80211_DEBUGFS |
140 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, | |
141 | struct iwl_rate *mcs, int index); | |
142 | #else | |
143 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, | |
144 | struct iwl_rate *mcs, int index) | |
145 | {} | |
146 | #endif | |
b481de9c ZY |
147 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
148 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
149 | }; | |
150 | ||
151 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
152 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
153 | }; | |
154 | ||
155 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
156 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
157 | }; | |
158 | ||
159 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
160 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
161 | }; | |
162 | ||
163 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
164 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
165 | }; | |
166 | ||
167 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
168 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
169 | }; | |
170 | ||
171 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
172 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
173 | }; | |
174 | ||
175 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
176 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
177 | }; | |
178 | ||
179 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
180 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
181 | }; | |
182 | ||
183 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
184 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
185 | }; | |
186 | ||
187 | static int iwl_lq_sync_callback(struct iwl_priv *priv, | |
188 | struct iwl_cmd *cmd, struct sk_buff *skb) | |
189 | { | |
190 | /*We didn't cache the SKB; let the caller free it */ | |
191 | return 1; | |
192 | } | |
193 | ||
194 | static inline u8 iwl_rate_get_rate(u32 rate_n_flags) | |
195 | { | |
196 | return (u8)(rate_n_flags & 0xFF); | |
197 | } | |
198 | ||
199 | static int rs_send_lq_cmd(struct iwl_priv *priv, | |
200 | struct iwl_link_quality_cmd *lq, u8 flags) | |
201 | { | |
202 | #ifdef CONFIG_IWLWIFI_DEBUG | |
203 | int i; | |
204 | #endif | |
205 | int rc = -1; | |
206 | ||
207 | struct iwl_host_cmd cmd = { | |
208 | .id = REPLY_TX_LINK_QUALITY_CMD, | |
209 | .len = sizeof(struct iwl_link_quality_cmd), | |
210 | .meta.flags = flags, | |
211 | .data = lq, | |
212 | }; | |
213 | ||
214 | if ((lq->sta_id == 0xFF) && | |
215 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
216 | return rc; | |
217 | ||
218 | if (lq->sta_id == 0xFF) | |
219 | lq->sta_id = IWL_AP_ID; | |
220 | ||
221 | IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id); | |
222 | IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n", | |
223 | lq->general_params.single_stream_ant_msk, | |
224 | lq->general_params.dual_stream_ant_msk); | |
225 | #ifdef CONFIG_IWLWIFI_DEBUG | |
226 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
227 | IWL_DEBUG_RATE("lq index %d 0x%X\n", | |
228 | i, lq->rs_table[i].rate_n_flags); | |
229 | #endif | |
230 | ||
231 | if (flags & CMD_ASYNC) | |
232 | cmd.meta.u.callback = iwl_lq_sync_callback; | |
233 | ||
234 | if (iwl_is_associated(priv) && priv->assoc_station_added && | |
235 | priv->lq_mngr.lq_ready) | |
236 | rc = iwl_send_cmd(priv, &cmd); | |
237 | ||
238 | return rc; | |
239 | } | |
240 | ||
241 | static int rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) | |
242 | { | |
243 | window->data = 0; | |
244 | window->success_counter = 0; | |
245 | window->success_ratio = IWL_INVALID_VALUE; | |
246 | window->counter = 0; | |
247 | window->average_tpt = IWL_INVALID_VALUE; | |
248 | window->stamp = 0; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, | |
254 | int scale_index, s32 tpt, u32 status) | |
255 | { | |
256 | int rc = 0; | |
257 | struct iwl_rate_scale_data *window = NULL; | |
258 | u64 mask; | |
259 | u8 win_size = IWL_RATE_MAX_WINDOW; | |
260 | s32 fail_count; | |
261 | ||
262 | if (scale_index < 0) | |
263 | return -1; | |
264 | ||
265 | if (scale_index >= IWL_RATE_COUNT) | |
266 | return -1; | |
267 | ||
268 | window = &(windows[scale_index]); | |
269 | ||
270 | if (window->counter >= win_size) { | |
271 | ||
272 | window->counter = win_size - 1; | |
273 | mask = 1; | |
274 | mask = (mask << (win_size - 1)); | |
275 | if ((window->data & mask)) { | |
276 | window->data &= ~mask; | |
277 | window->success_counter = window->success_counter - 1; | |
278 | } | |
279 | } | |
280 | ||
281 | window->counter = window->counter + 1; | |
282 | mask = window->data; | |
283 | window->data = (mask << 1); | |
284 | if (status != 0) { | |
285 | window->success_counter = window->success_counter + 1; | |
286 | window->data |= 0x1; | |
287 | } | |
288 | ||
289 | if (window->counter > 0) | |
290 | window->success_ratio = 128 * (100 * window->success_counter) | |
291 | / window->counter; | |
292 | else | |
293 | window->success_ratio = IWL_INVALID_VALUE; | |
294 | ||
295 | fail_count = window->counter - window->success_counter; | |
296 | ||
297 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || | |
298 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
299 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
300 | else | |
301 | window->average_tpt = IWL_INVALID_VALUE; | |
302 | ||
303 | window->stamp = jiffies; | |
304 | ||
305 | return rc; | |
306 | } | |
307 | ||
308 | int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, | |
309 | struct iwl_scale_tbl_info *tbl, | |
310 | int index, u8 use_green) | |
311 | { | |
312 | int rc = 0; | |
313 | ||
314 | if (is_legacy(tbl->lq_type)) { | |
315 | mcs_rate->rate_n_flags = iwl_rates[index].plcp; | |
316 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) | |
317 | mcs_rate->rate_n_flags |= RATE_MCS_CCK_MSK; | |
318 | ||
319 | } else if (is_siso(tbl->lq_type)) { | |
320 | if (index > IWL_LAST_OFDM_RATE) | |
321 | index = IWL_LAST_OFDM_RATE; | |
322 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_siso | | |
323 | RATE_MCS_HT_MSK; | |
324 | } else { | |
325 | if (index > IWL_LAST_OFDM_RATE) | |
326 | index = IWL_LAST_OFDM_RATE; | |
327 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_mimo | | |
328 | RATE_MCS_HT_MSK; | |
329 | } | |
330 | ||
331 | switch (tbl->antenna_type) { | |
332 | case ANT_BOTH: | |
333 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_AB_MSK; | |
334 | break; | |
335 | case ANT_MAIN: | |
336 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
337 | break; | |
338 | case ANT_AUX: | |
339 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
340 | break; | |
341 | case ANT_NONE: | |
342 | break; | |
343 | } | |
344 | ||
345 | if (is_legacy(tbl->lq_type)) | |
346 | return rc; | |
347 | ||
348 | if (tbl->is_fat) { | |
349 | if (tbl->is_dup) | |
350 | mcs_rate->rate_n_flags |= RATE_MCS_DUP_MSK; | |
351 | else | |
352 | mcs_rate->rate_n_flags |= RATE_MCS_FAT_MSK; | |
353 | } | |
354 | if (tbl->is_SGI) | |
355 | mcs_rate->rate_n_flags |= RATE_MCS_SGI_MSK; | |
356 | ||
357 | if (use_green) { | |
358 | mcs_rate->rate_n_flags |= RATE_MCS_GF_MSK; | |
359 | if (is_siso(tbl->lq_type)) | |
360 | mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
361 | } | |
362 | return rc; | |
363 | } | |
364 | ||
365 | static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, | |
366 | int phymode, struct iwl_scale_tbl_info *tbl, | |
367 | int *rate_idx) | |
368 | { | |
369 | int index; | |
370 | u32 ant_msk; | |
371 | ||
372 | index = iwl_rate_index_from_plcp(mcs_rate->rate_n_flags); | |
373 | ||
374 | if (index == IWL_RATE_INVALID) { | |
375 | *rate_idx = -1; | |
376 | return -1; | |
377 | } | |
378 | tbl->is_SGI = 0; | |
379 | tbl->is_fat = 0; | |
380 | tbl->is_dup = 0; | |
381 | tbl->antenna_type = ANT_BOTH; | |
382 | ||
383 | if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { | |
384 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
385 | ||
386 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
387 | tbl->lq_type = LQ_NONE; | |
388 | else { | |
389 | ||
390 | if (phymode == MODE_IEEE80211A) | |
391 | tbl->lq_type = LQ_A; | |
392 | else | |
393 | tbl->lq_type = LQ_G; | |
394 | ||
395 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
396 | tbl->antenna_type = ANT_MAIN; | |
397 | else | |
398 | tbl->antenna_type = ANT_AUX; | |
399 | } | |
400 | *rate_idx = index; | |
401 | ||
402 | } else if (iwl_rate_get_rate(mcs_rate->rate_n_flags) | |
403 | <= IWL_RATE_SISO_60M_PLCP) { | |
404 | tbl->lq_type = LQ_SISO; | |
405 | ||
406 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
407 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
408 | tbl->lq_type = LQ_NONE; | |
409 | else { | |
410 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
411 | tbl->antenna_type = ANT_MAIN; | |
412 | else | |
413 | tbl->antenna_type = ANT_AUX; | |
414 | } | |
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 | ||
425 | *rate_idx = index; | |
426 | } else { | |
427 | tbl->lq_type = LQ_MIMO; | |
428 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
429 | tbl->is_SGI = 1; | |
430 | ||
431 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
432 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
433 | tbl->is_fat = 1; | |
434 | ||
435 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
436 | tbl->is_dup = 1; | |
437 | *rate_idx = index; | |
438 | } | |
439 | return 0; | |
440 | } | |
441 | ||
442 | static inline void rs_toggle_antenna(struct iwl_rate *new_rate, | |
443 | struct iwl_scale_tbl_info *tbl) | |
444 | { | |
445 | if (tbl->antenna_type == ANT_AUX) { | |
446 | tbl->antenna_type = ANT_MAIN; | |
447 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_B_MSK; | |
448 | new_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
449 | } else { | |
450 | tbl->antenna_type = ANT_AUX; | |
451 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
452 | new_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
453 | } | |
454 | } | |
455 | ||
456 | static inline s8 rs_use_green(struct iwl_priv *priv) | |
457 | { | |
458 | s8 rc = 0; | |
459 | #ifdef CONFIG_IWLWIFI_HT | |
460 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
461 | return 0; | |
462 | ||
463 | if ((priv->current_assoc_ht.is_green_field) && | |
464 | !(priv->current_assoc_ht.operating_mode & 0x4)) | |
465 | rc = 1; | |
466 | #endif /*CONFIG_IWLWIFI_HT */ | |
467 | return rc; | |
468 | } | |
469 | ||
470 | /** | |
471 | * rs_get_supported_rates - get the available rates | |
472 | * | |
473 | * if management frame or broadcast frame only return | |
474 | * basic available rates. | |
475 | * | |
476 | */ | |
477 | static void rs_get_supported_rates(struct iwl_rate_scale_priv *lq_data, | |
478 | struct ieee80211_hdr *hdr, | |
479 | enum iwl_table_type rate_type, | |
480 | u16 *data_rate) | |
481 | { | |
482 | if (is_legacy(rate_type)) | |
483 | *data_rate = lq_data->active_rate; | |
484 | else { | |
485 | if (is_siso(rate_type)) | |
486 | *data_rate = lq_data->active_siso_rate; | |
487 | else | |
488 | *data_rate = lq_data->active_mimo_rate; | |
489 | } | |
490 | ||
491 | if (hdr && is_multicast_ether_addr(hdr->addr1) && | |
492 | lq_data->active_rate_basic) | |
493 | *data_rate = lq_data->active_rate_basic; | |
494 | } | |
495 | ||
496 | static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) | |
497 | { | |
498 | u8 high = IWL_RATE_INVALID; | |
499 | u8 low = IWL_RATE_INVALID; | |
500 | ||
01ebd063 | 501 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
502 | * the rate table */ |
503 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
504 | int i; | |
505 | u32 mask; | |
506 | ||
507 | /* Find the previous rate that is in the rate mask */ | |
508 | i = index - 1; | |
509 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
510 | if (rate_mask & mask) { | |
511 | low = i; | |
512 | break; | |
513 | } | |
514 | } | |
515 | ||
516 | /* Find the next rate that is in the rate mask */ | |
517 | i = index + 1; | |
518 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
519 | if (rate_mask & mask) { | |
520 | high = i; | |
521 | break; | |
522 | } | |
523 | } | |
524 | ||
525 | return (high << 8) | low; | |
526 | } | |
527 | ||
528 | low = index; | |
529 | while (low != IWL_RATE_INVALID) { | |
530 | low = iwl_rates[low].prev_rs; | |
531 | if (low == IWL_RATE_INVALID) | |
532 | break; | |
533 | if (rate_mask & (1 << low)) | |
534 | break; | |
535 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
536 | } | |
537 | ||
538 | high = index; | |
539 | while (high != IWL_RATE_INVALID) { | |
540 | high = iwl_rates[high].next_rs; | |
541 | if (high == IWL_RATE_INVALID) | |
542 | break; | |
543 | if (rate_mask & (1 << high)) | |
544 | break; | |
545 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
546 | } | |
547 | ||
548 | return (high << 8) | low; | |
549 | } | |
550 | ||
551 | static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, | |
552 | struct iwl_scale_tbl_info *tbl, u8 scale_index, | |
02dede04 | 553 | u8 ht_possible, struct iwl_rate *mcs_rate) |
b481de9c | 554 | { |
b481de9c ZY |
555 | s32 low; |
556 | u16 rate_mask; | |
557 | u16 high_low; | |
558 | u8 switch_to_legacy = 0; | |
02dede04 | 559 | u8 is_green = lq_data->is_green; |
b481de9c ZY |
560 | |
561 | /* check if we need to switch from HT to legacy rates. | |
562 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
563 | * are always supported (spec demand) */ | |
564 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
565 | switch_to_legacy = 1; | |
566 | scale_index = rs_ht_to_legacy[scale_index]; | |
567 | if (lq_data->phymode == MODE_IEEE80211A) | |
568 | tbl->lq_type = LQ_A; | |
569 | else | |
570 | tbl->lq_type = LQ_G; | |
571 | ||
572 | if ((tbl->antenna_type == ANT_BOTH) || | |
573 | (tbl->antenna_type == ANT_NONE)) | |
574 | tbl->antenna_type = ANT_MAIN; | |
575 | ||
576 | tbl->is_fat = 0; | |
577 | tbl->is_SGI = 0; | |
578 | } | |
579 | ||
580 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, &rate_mask); | |
581 | ||
582 | /* mask with station rate restriction */ | |
583 | if (is_legacy(tbl->lq_type)) { | |
584 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
585 | rate_mask = (u16)(rate_mask & | |
02dede04 | 586 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 587 | else |
02dede04 | 588 | rate_mask = (u16)(rate_mask & lq_data->supp_rates); |
b481de9c ZY |
589 | } |
590 | ||
591 | /* if we did switched from HT to legacy check current rate */ | |
592 | if ((switch_to_legacy) && | |
593 | (rate_mask & (1 << scale_index))) { | |
594 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
595 | return 0; | |
596 | } | |
597 | ||
598 | high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); | |
599 | low = high_low & 0xff; | |
600 | ||
601 | if (low != IWL_RATE_INVALID) | |
602 | rs_mcs_from_tbl(mcs_rate, tbl, low, is_green); | |
603 | else | |
604 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
609 | static void rs_tx_status(void *priv_rate, | |
610 | struct net_device *dev, | |
611 | struct sk_buff *skb, | |
612 | struct ieee80211_tx_status *tx_resp) | |
613 | { | |
614 | int status; | |
615 | u8 retries; | |
616 | int rs_index, index = 0; | |
617 | struct iwl_rate_scale_priv *lq; | |
618 | struct iwl_link_quality_cmd *table; | |
619 | struct sta_info *sta; | |
620 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
621 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
622 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
623 | struct iwl_rate_scale_data *window = NULL; | |
624 | struct iwl_rate_scale_data *search_win = NULL; | |
625 | struct iwl_rate tx_mcs; | |
626 | struct iwl_scale_tbl_info tbl_type; | |
627 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
628 | u8 active_index = 0; | |
629 | u16 fc = le16_to_cpu(hdr->frame_control); | |
630 | s32 tpt = 0; | |
631 | ||
58826351 | 632 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
633 | |
634 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
635 | return; | |
636 | ||
637 | retries = tx_resp->retry_count; | |
638 | ||
639 | if (retries > 15) | |
640 | retries = 15; | |
641 | ||
642 | ||
643 | sta = sta_info_get(local, hdr->addr1); | |
644 | ||
645 | if (!sta || !sta->rate_ctrl_priv) { | |
646 | if (sta) | |
647 | sta_info_put(sta); | |
648 | return; | |
649 | } | |
650 | ||
651 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
652 | ||
653 | if (!priv->lq_mngr.lq_ready) | |
654 | return; | |
655 | ||
656 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) | |
657 | return; | |
658 | ||
659 | table = &lq->lq; | |
660 | active_index = lq->active_tbl; | |
661 | ||
662 | lq->antenna = (lq->valid_antenna & local->hw.conf.antenna_sel_tx); | |
663 | if (!lq->antenna) | |
664 | lq->antenna = lq->valid_antenna; | |
665 | ||
666 | lq->antenna = lq->valid_antenna; | |
667 | curr_tbl = &(lq->lq_info[active_index]); | |
668 | search_tbl = &(lq->lq_info[(1 - active_index)]); | |
669 | window = (struct iwl_rate_scale_data *) | |
670 | &(curr_tbl->win[0]); | |
671 | search_win = (struct iwl_rate_scale_data *) | |
672 | &(search_tbl->win[0]); | |
673 | ||
674 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
675 | ||
676 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
677 | &tbl_type, &rs_index); | |
678 | if ((rs_index < 0) || (rs_index >= IWL_RATE_COUNT)) { | |
679 | IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n", | |
680 | rs_index, tx_mcs.rate_n_flags); | |
681 | sta_info_put(sta); | |
682 | return; | |
683 | } | |
684 | ||
685 | if (retries && | |
686 | (tx_mcs.rate_n_flags != | |
687 | le32_to_cpu(table->rs_table[0].rate_n_flags))) { | |
688 | IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n", | |
689 | tx_mcs.rate_n_flags, | |
690 | le32_to_cpu(table->rs_table[0].rate_n_flags)); | |
691 | sta_info_put(sta); | |
692 | return; | |
693 | } | |
694 | ||
695 | while (retries) { | |
696 | tx_mcs.rate_n_flags = | |
697 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
698 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
699 | &tbl_type, &rs_index); | |
700 | ||
701 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
702 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
703 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
704 | if (search_tbl->expected_tpt) | |
705 | tpt = search_tbl->expected_tpt[rs_index]; | |
706 | else | |
707 | tpt = 0; | |
708 | rs_collect_tx_data(search_win, | |
709 | rs_index, tpt, 0); | |
710 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
711 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
712 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
713 | if (curr_tbl->expected_tpt) | |
714 | tpt = curr_tbl->expected_tpt[rs_index]; | |
715 | else | |
716 | tpt = 0; | |
717 | rs_collect_tx_data(window, rs_index, tpt, 0); | |
718 | } | |
719 | if (lq->stay_in_tbl) | |
720 | lq->total_failed++; | |
721 | --retries; | |
722 | index++; | |
723 | ||
724 | } | |
725 | ||
726 | if (!tx_resp->retry_count) | |
727 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
728 | else | |
729 | tx_mcs.rate_n_flags = | |
730 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
731 | ||
732 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
733 | &tbl_type, &rs_index); | |
734 | ||
735 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) | |
736 | status = 1; | |
737 | else | |
738 | status = 0; | |
739 | ||
740 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
741 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
742 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
743 | if (search_tbl->expected_tpt) | |
744 | tpt = search_tbl->expected_tpt[rs_index]; | |
745 | else | |
746 | tpt = 0; | |
747 | rs_collect_tx_data(search_win, | |
748 | rs_index, tpt, status); | |
749 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
750 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
751 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
752 | if (curr_tbl->expected_tpt) | |
753 | tpt = curr_tbl->expected_tpt[rs_index]; | |
754 | else | |
755 | tpt = 0; | |
756 | rs_collect_tx_data(window, rs_index, tpt, status); | |
757 | } | |
758 | ||
759 | if (lq->stay_in_tbl) { | |
760 | if (status) | |
761 | lq->total_success++; | |
762 | else | |
763 | lq->total_failed++; | |
764 | } | |
765 | ||
766 | rs_rate_scale_perform(priv, dev, hdr, sta); | |
767 | sta_info_put(sta); | |
768 | return; | |
769 | } | |
770 | ||
771 | static u8 rs_is_ant_connected(u8 valid_antenna, | |
772 | enum iwl_antenna_type antenna_type) | |
773 | { | |
774 | if (antenna_type == ANT_AUX) | |
775 | return ((valid_antenna & 0x2) ? 1:0); | |
776 | else if (antenna_type == ANT_MAIN) | |
777 | return ((valid_antenna & 0x1) ? 1:0); | |
778 | else if (antenna_type == ANT_BOTH) { | |
779 | if ((valid_antenna & 0x3) == 0x3) | |
780 | return 1; | |
781 | else | |
782 | return 0; | |
783 | } | |
784 | ||
785 | return 1; | |
786 | } | |
787 | ||
788 | static u8 rs_is_other_ant_connected(u8 valid_antenna, | |
789 | enum iwl_antenna_type antenna_type) | |
790 | { | |
791 | if (antenna_type == ANT_AUX) | |
792 | return (rs_is_ant_connected(valid_antenna, ANT_MAIN)); | |
793 | else | |
794 | return (rs_is_ant_connected(valid_antenna, ANT_AUX)); | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | static void rs_set_stay_in_table(u8 is_legacy, | |
800 | struct iwl_rate_scale_priv *lq_data) | |
801 | { | |
802 | IWL_DEBUG_HT("we are staying in the same table\n"); | |
803 | lq_data->stay_in_tbl = 1; | |
804 | if (is_legacy) { | |
805 | lq_data->table_count_limit = IWL_LEGACY_TABLE_COUNT; | |
806 | lq_data->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
807 | lq_data->max_success_limit = IWL_LEGACY_TABLE_COUNT; | |
808 | } else { | |
809 | lq_data->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; | |
810 | lq_data->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
811 | lq_data->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
812 | } | |
813 | lq_data->table_count = 0; | |
814 | lq_data->total_failed = 0; | |
815 | lq_data->total_success = 0; | |
816 | } | |
817 | ||
818 | static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, | |
819 | struct iwl_scale_tbl_info *tbl) | |
820 | { | |
821 | if (is_legacy(tbl->lq_type)) { | |
822 | if (!is_a_band(tbl->lq_type)) | |
823 | tbl->expected_tpt = expected_tpt_G; | |
824 | else | |
825 | tbl->expected_tpt = expected_tpt_A; | |
826 | } else if (is_siso(tbl->lq_type)) { | |
827 | if (tbl->is_fat && !lq_data->is_dup) | |
828 | if (tbl->is_SGI) | |
829 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
830 | else | |
831 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
832 | else if (tbl->is_SGI) | |
833 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
834 | else | |
835 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
836 | ||
837 | } else if (is_mimo(tbl->lq_type)) { | |
838 | if (tbl->is_fat && !lq_data->is_dup) | |
839 | if (tbl->is_SGI) | |
840 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
841 | else | |
842 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
843 | else if (tbl->is_SGI) | |
844 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
845 | else | |
846 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
847 | } else | |
848 | tbl->expected_tpt = expected_tpt_G; | |
849 | } | |
850 | ||
851 | #ifdef CONFIG_IWLWIFI_HT | |
852 | static s32 rs_get_best_rate(struct iwl_priv *priv, | |
853 | struct iwl_rate_scale_priv *lq_data, | |
854 | struct iwl_scale_tbl_info *tbl, | |
855 | u16 rate_mask, s8 index, s8 rate) | |
856 | { | |
857 | struct iwl_scale_tbl_info *active_tbl = | |
858 | &(lq_data->lq_info[lq_data->active_tbl]); | |
859 | s32 new_rate, high, low, start_hi; | |
860 | s32 active_sr = active_tbl->win[index].success_ratio; | |
861 | s32 *tpt_tbl = tbl->expected_tpt; | |
862 | s32 active_tpt = active_tbl->expected_tpt[index]; | |
863 | u16 high_low; | |
864 | ||
865 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
866 | ||
867 | for (; ;) { | |
868 | high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); | |
869 | ||
870 | low = high_low & 0xff; | |
871 | high = (high_low >> 8) & 0xff; | |
872 | ||
873 | if ((((100 * tpt_tbl[rate]) > lq_data->last_tpt) && | |
874 | ((active_sr > IWL_RATE_DECREASE_TH) && | |
875 | (active_sr <= IWL_RATE_HIGH_TH) && | |
876 | (tpt_tbl[rate] <= active_tpt))) || | |
877 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
878 | (tpt_tbl[rate] > active_tpt))) { | |
879 | ||
880 | if (start_hi != IWL_RATE_INVALID) { | |
881 | new_rate = start_hi; | |
882 | break; | |
883 | } | |
884 | new_rate = rate; | |
885 | if (low != IWL_RATE_INVALID) | |
886 | rate = low; | |
887 | else | |
888 | break; | |
889 | } else { | |
890 | if (new_rate != IWL_RATE_INVALID) | |
891 | break; | |
892 | else if (high != IWL_RATE_INVALID) { | |
893 | start_hi = high; | |
894 | rate = high; | |
895 | } else { | |
896 | new_rate = rate; | |
897 | break; | |
898 | } | |
899 | } | |
900 | } | |
901 | ||
902 | return new_rate; | |
903 | } | |
904 | #endif /* CONFIG_IWLWIFI_HT */ | |
905 | ||
906 | static inline u8 rs_is_both_ant_supp(u8 valid_antenna) | |
907 | { | |
908 | return (rs_is_ant_connected(valid_antenna, ANT_BOTH)); | |
909 | } | |
910 | ||
911 | static int rs_switch_to_mimo(struct iwl_priv *priv, | |
912 | struct iwl_rate_scale_priv *lq_data, | |
913 | struct iwl_scale_tbl_info *tbl, int index) | |
914 | { | |
915 | int rc = -1; | |
916 | #ifdef CONFIG_IWLWIFI_HT | |
917 | u16 rate_mask; | |
918 | s32 rate; | |
919 | s8 is_green = lq_data->is_green; | |
920 | ||
921 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
922 | return -1; | |
923 | ||
924 | IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); | |
925 | tbl->lq_type = LQ_MIMO; | |
926 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
927 | &rate_mask); | |
928 | ||
929 | if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) | |
930 | return -1; | |
931 | ||
932 | if (!rs_is_both_ant_supp(lq_data->antenna)) | |
933 | return -1; | |
934 | ||
935 | rc = 0; | |
936 | tbl->is_dup = lq_data->is_dup; | |
937 | tbl->action = 0; | |
938 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
939 | tbl->is_fat = 1; | |
940 | else | |
941 | tbl->is_fat = 0; | |
942 | ||
943 | if (tbl->is_fat) { | |
944 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
945 | tbl->is_SGI = 1; | |
946 | else | |
947 | tbl->is_SGI = 0; | |
948 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
949 | tbl->is_SGI = 1; | |
950 | else | |
951 | tbl->is_SGI = 0; | |
952 | ||
953 | rs_get_expected_tpt_table(lq_data, tbl); | |
954 | ||
955 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
956 | ||
957 | IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate, rate_mask); | |
958 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) | |
959 | return -1; | |
960 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
961 | ||
962 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
963 | tbl->current_rate.rate_n_flags, is_green); | |
964 | ||
965 | #endif /*CONFIG_IWLWIFI_HT */ | |
966 | return rc; | |
967 | } | |
968 | ||
969 | static int rs_switch_to_siso(struct iwl_priv *priv, | |
970 | struct iwl_rate_scale_priv *lq_data, | |
971 | struct iwl_scale_tbl_info *tbl, int index) | |
972 | { | |
973 | int rc = -1; | |
974 | #ifdef CONFIG_IWLWIFI_HT | |
975 | u16 rate_mask; | |
976 | u8 is_green = lq_data->is_green; | |
977 | s32 rate; | |
978 | ||
979 | IWL_DEBUG_HT("LQ: try to switch to SISO\n"); | |
980 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
981 | return -1; | |
982 | ||
983 | rc = 0; | |
984 | tbl->is_dup = lq_data->is_dup; | |
985 | tbl->lq_type = LQ_SISO; | |
986 | tbl->action = 0; | |
987 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
988 | &rate_mask); | |
989 | ||
990 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
991 | tbl->is_fat = 1; | |
992 | else | |
993 | tbl->is_fat = 0; | |
994 | ||
995 | if (tbl->is_fat) { | |
996 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
997 | tbl->is_SGI = 1; | |
998 | else | |
999 | tbl->is_SGI = 0; | |
1000 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
1001 | tbl->is_SGI = 1; | |
1002 | else | |
1003 | tbl->is_SGI = 0; | |
1004 | ||
1005 | if (is_green) | |
1006 | tbl->is_SGI = 0; | |
1007 | ||
1008 | rs_get_expected_tpt_table(lq_data, tbl); | |
1009 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
1010 | ||
1011 | IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask); | |
1012 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
1013 | IWL_DEBUG_HT("can not switch with index %d rate mask %x\n", | |
1014 | rate, rate_mask); | |
1015 | return -1; | |
1016 | } | |
1017 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
1018 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
1019 | tbl->current_rate.rate_n_flags, is_green); | |
1020 | ||
1021 | #endif /*CONFIG_IWLWIFI_HT */ | |
1022 | return rc; | |
1023 | } | |
1024 | ||
1025 | static int rs_move_legacy_other(struct iwl_priv *priv, | |
1026 | struct iwl_rate_scale_priv *lq_data, | |
1027 | int index) | |
1028 | { | |
1029 | int rc = 0; | |
1030 | struct iwl_scale_tbl_info *tbl = | |
1031 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1032 | struct iwl_scale_tbl_info *search_tbl = | |
1033 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1034 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1035 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1036 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1037 | u8 start_action = tbl->action; | |
1038 | ||
1039 | for (; ;) { | |
1040 | switch (tbl->action) { | |
1041 | case IWL_LEGACY_SWITCH_ANTENNA: | |
1042 | IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); | |
1043 | ||
1044 | search_tbl->lq_type = LQ_NONE; | |
1045 | lq_data->action_counter++; | |
1046 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1047 | break; | |
1048 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1049 | tbl->antenna_type)) | |
1050 | break; | |
1051 | ||
1052 | memcpy(search_tbl, tbl, sz); | |
1053 | ||
1054 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1055 | search_tbl); | |
1056 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1057 | lq_data->search_better_tbl = 1; | |
1058 | goto out; | |
1059 | ||
1060 | case IWL_LEGACY_SWITCH_SISO: | |
1061 | IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); | |
1062 | memcpy(search_tbl, tbl, sz); | |
1063 | search_tbl->lq_type = LQ_SISO; | |
1064 | search_tbl->is_SGI = 0; | |
1065 | search_tbl->is_fat = 0; | |
1066 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, | |
1067 | index); | |
1068 | if (!rc) { | |
1069 | lq_data->search_better_tbl = 1; | |
1070 | lq_data->action_counter = 0; | |
1071 | } | |
1072 | if (!rc) | |
1073 | goto out; | |
1074 | ||
1075 | break; | |
1076 | case IWL_LEGACY_SWITCH_MIMO: | |
1077 | IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); | |
1078 | memcpy(search_tbl, tbl, sz); | |
1079 | search_tbl->lq_type = LQ_MIMO; | |
1080 | search_tbl->is_SGI = 0; | |
1081 | search_tbl->is_fat = 0; | |
1082 | search_tbl->antenna_type = ANT_BOTH; | |
1083 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, | |
1084 | index); | |
1085 | if (!rc) { | |
1086 | lq_data->search_better_tbl = 1; | |
1087 | lq_data->action_counter = 0; | |
1088 | } | |
1089 | if (!rc) | |
1090 | goto out; | |
1091 | break; | |
1092 | } | |
1093 | tbl->action++; | |
1094 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1095 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1096 | ||
1097 | if (tbl->action == start_action) | |
1098 | break; | |
1099 | ||
1100 | } | |
1101 | return 0; | |
1102 | ||
1103 | out: | |
1104 | tbl->action++; | |
1105 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1106 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1107 | return 0; | |
1108 | ||
1109 | } | |
1110 | ||
1111 | static int rs_move_siso_to_other(struct iwl_priv *priv, | |
1112 | struct iwl_rate_scale_priv *lq_data, | |
1113 | int index) | |
1114 | { | |
1115 | int rc = -1; | |
1116 | u8 is_green = lq_data->is_green; | |
1117 | struct iwl_scale_tbl_info *tbl = | |
1118 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1119 | struct iwl_scale_tbl_info *search_tbl = | |
1120 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1121 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1122 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1123 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1124 | u8 start_action = tbl->action; | |
1125 | ||
1126 | for (;;) { | |
1127 | lq_data->action_counter++; | |
1128 | switch (tbl->action) { | |
1129 | case IWL_SISO_SWITCH_ANTENNA: | |
1130 | IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n"); | |
1131 | search_tbl->lq_type = LQ_NONE; | |
1132 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1133 | break; | |
1134 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1135 | tbl->antenna_type)) | |
1136 | break; | |
1137 | ||
1138 | memcpy(search_tbl, tbl, sz); | |
1139 | search_tbl->action = IWL_SISO_SWITCH_MIMO; | |
1140 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1141 | search_tbl); | |
1142 | lq_data->search_better_tbl = 1; | |
1143 | ||
1144 | goto out; | |
1145 | ||
1146 | case IWL_SISO_SWITCH_MIMO: | |
1147 | IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n"); | |
1148 | memcpy(search_tbl, tbl, sz); | |
1149 | search_tbl->lq_type = LQ_MIMO; | |
1150 | search_tbl->is_SGI = 0; | |
1151 | search_tbl->is_fat = 0; | |
1152 | search_tbl->antenna_type = ANT_BOTH; | |
1153 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, | |
1154 | index); | |
1155 | if (!rc) | |
1156 | lq_data->search_better_tbl = 1; | |
1157 | ||
1158 | if (!rc) | |
1159 | goto out; | |
1160 | break; | |
1161 | case IWL_SISO_SWITCH_GI: | |
1162 | IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); | |
1163 | memcpy(search_tbl, tbl, sz); | |
1164 | search_tbl->action = 0; | |
1165 | if (search_tbl->is_SGI) | |
1166 | search_tbl->is_SGI = 0; | |
1167 | else if (!is_green) | |
1168 | search_tbl->is_SGI = 1; | |
1169 | else | |
1170 | break; | |
1171 | lq_data->search_better_tbl = 1; | |
1172 | if ((tbl->lq_type == LQ_SISO) && | |
1173 | (tbl->is_SGI)) { | |
1174 | s32 tpt = lq_data->last_tpt / 100; | |
1175 | if (((!tbl->is_fat) && | |
1176 | (tpt >= expected_tpt_siso20MHz[index])) || | |
1177 | ((tbl->is_fat) && | |
1178 | (tpt >= expected_tpt_siso40MHz[index]))) | |
1179 | lq_data->search_better_tbl = 0; | |
1180 | } | |
1181 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1182 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1183 | search_tbl, index, is_green); | |
1184 | goto out; | |
1185 | } | |
1186 | tbl->action++; | |
1187 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1188 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1189 | ||
1190 | if (tbl->action == start_action) | |
1191 | break; | |
1192 | } | |
1193 | return 0; | |
1194 | ||
1195 | out: | |
1196 | tbl->action++; | |
1197 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1198 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | static int rs_move_mimo_to_other(struct iwl_priv *priv, | |
1203 | struct iwl_rate_scale_priv *lq_data, | |
1204 | int index) | |
1205 | { | |
1206 | int rc = -1; | |
1207 | s8 is_green = lq_data->is_green; | |
1208 | struct iwl_scale_tbl_info *tbl = | |
1209 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1210 | struct iwl_scale_tbl_info *search_tbl = | |
1211 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1212 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1213 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1214 | u8 start_action = tbl->action; | |
1215 | ||
1216 | for (;;) { | |
1217 | lq_data->action_counter++; | |
1218 | switch (tbl->action) { | |
1219 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1220 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
1221 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n"); | |
1222 | memcpy(search_tbl, tbl, sz); | |
1223 | search_tbl->lq_type = LQ_SISO; | |
1224 | search_tbl->is_SGI = 0; | |
1225 | search_tbl->is_fat = 0; | |
1226 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) | |
1227 | search_tbl->antenna_type = ANT_MAIN; | |
1228 | else | |
1229 | search_tbl->antenna_type = ANT_AUX; | |
1230 | ||
1231 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, | |
1232 | index); | |
1233 | if (!rc) { | |
1234 | lq_data->search_better_tbl = 1; | |
1235 | goto out; | |
1236 | } | |
1237 | break; | |
1238 | ||
1239 | case IWL_MIMO_SWITCH_GI: | |
1240 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); | |
1241 | memcpy(search_tbl, tbl, sz); | |
1242 | search_tbl->lq_type = LQ_MIMO; | |
1243 | search_tbl->antenna_type = ANT_BOTH; | |
1244 | search_tbl->action = 0; | |
1245 | if (search_tbl->is_SGI) | |
1246 | search_tbl->is_SGI = 0; | |
1247 | else | |
1248 | search_tbl->is_SGI = 1; | |
1249 | lq_data->search_better_tbl = 1; | |
1250 | if ((tbl->lq_type == LQ_MIMO) && | |
1251 | (tbl->is_SGI)) { | |
1252 | s32 tpt = lq_data->last_tpt / 100; | |
1253 | if (((!tbl->is_fat) && | |
1254 | (tpt >= expected_tpt_mimo20MHz[index])) || | |
1255 | ((tbl->is_fat) && | |
1256 | (tpt >= expected_tpt_mimo40MHz[index]))) | |
1257 | lq_data->search_better_tbl = 0; | |
1258 | } | |
1259 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1260 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1261 | search_tbl, index, is_green); | |
1262 | goto out; | |
1263 | ||
1264 | } | |
1265 | tbl->action++; | |
1266 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1267 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1268 | ||
1269 | if (tbl->action == start_action) | |
1270 | break; | |
1271 | } | |
1272 | ||
1273 | return 0; | |
1274 | out: | |
1275 | tbl->action++; | |
1276 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1277 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1278 | return 0; | |
1279 | ||
1280 | } | |
1281 | ||
1282 | static void rs_stay_in_table(struct iwl_rate_scale_priv *lq_data) | |
1283 | { | |
1284 | struct iwl_scale_tbl_info *tbl; | |
1285 | int i; | |
1286 | int active_tbl; | |
1287 | int flush_interval_passed = 0; | |
1288 | ||
1289 | active_tbl = lq_data->active_tbl; | |
1290 | ||
1291 | tbl = &(lq_data->lq_info[active_tbl]); | |
1292 | ||
1293 | if (lq_data->stay_in_tbl) { | |
1294 | ||
1295 | if (lq_data->flush_timer) | |
1296 | flush_interval_passed = | |
1297 | time_after(jiffies, | |
1298 | (unsigned long)(lq_data->flush_timer + | |
1299 | IWL_RATE_SCALE_FLUSH_INTVL)); | |
1300 | ||
1301 | flush_interval_passed = 0; | |
1302 | if ((lq_data->total_failed > lq_data->max_failure_limit) || | |
1303 | (lq_data->total_success > lq_data->max_success_limit) || | |
1304 | ((!lq_data->search_better_tbl) && (lq_data->flush_timer) | |
1305 | && (flush_interval_passed))) { | |
1306 | IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:", | |
1307 | lq_data->total_failed, | |
1308 | lq_data->total_success, | |
1309 | flush_interval_passed); | |
1310 | lq_data->stay_in_tbl = 0; | |
1311 | lq_data->total_failed = 0; | |
1312 | lq_data->total_success = 0; | |
1313 | lq_data->flush_timer = 0; | |
1314 | } else if (lq_data->table_count > 0) { | |
1315 | lq_data->table_count++; | |
1316 | if (lq_data->table_count >= | |
1317 | lq_data->table_count_limit) { | |
1318 | lq_data->table_count = 0; | |
1319 | ||
1320 | IWL_DEBUG_HT("LQ: stay in table clear win\n"); | |
1321 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1322 | rs_rate_scale_clear_window( | |
1323 | &(tbl->win[i])); | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | if (!lq_data->stay_in_tbl) { | |
1328 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1329 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1330 | } | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | static void rs_rate_scale_perform(struct iwl_priv *priv, | |
1335 | struct net_device *dev, | |
1336 | struct ieee80211_hdr *hdr, | |
1337 | struct sta_info *sta) | |
1338 | { | |
1339 | int low = IWL_RATE_INVALID; | |
1340 | int high = IWL_RATE_INVALID; | |
1341 | int index; | |
1342 | int i; | |
1343 | struct iwl_rate_scale_data *window = NULL; | |
1344 | int current_tpt = IWL_INVALID_VALUE; | |
1345 | int low_tpt = IWL_INVALID_VALUE; | |
1346 | int high_tpt = IWL_INVALID_VALUE; | |
1347 | u32 fail_count; | |
1348 | s8 scale_action = 0; | |
1349 | u16 fc, rate_mask; | |
1350 | u8 update_lq = 0; | |
1351 | struct iwl_rate_scale_priv *lq_data; | |
1352 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
1353 | u16 rate_scale_index_msk = 0; | |
1354 | struct iwl_rate mcs_rate; | |
1355 | u8 is_green = 0; | |
1356 | u8 active_tbl = 0; | |
1357 | u8 done_search = 0; | |
1358 | u16 high_low; | |
1359 | ||
1360 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1361 | ||
1362 | fc = le16_to_cpu(hdr->frame_control); | |
1363 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1364 | /* Send management frames and broadcast/multicast data using | |
1365 | * lowest rate. */ | |
1366 | /* TODO: this could probably be improved.. */ | |
1367 | return; | |
1368 | } | |
1369 | ||
1370 | if (!sta || !sta->rate_ctrl_priv) | |
1371 | return; | |
1372 | ||
1373 | if (!priv->lq_mngr.lq_ready) { | |
1374 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1375 | return; | |
1376 | } | |
1377 | lq_data = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1378 | ||
1379 | if (!lq_data->search_better_tbl) | |
1380 | active_tbl = lq_data->active_tbl; | |
1381 | else | |
1382 | active_tbl = 1 - lq_data->active_tbl; | |
1383 | ||
1384 | tbl = &(lq_data->lq_info[active_tbl]); | |
1385 | is_green = lq_data->is_green; | |
1386 | ||
1387 | index = sta->last_txrate; | |
1388 | ||
1389 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1390 | tbl->lq_type); | |
1391 | ||
1392 | rs_get_supported_rates(lq_data, hdr, tbl->lq_type, | |
1393 | &rate_mask); | |
1394 | ||
1395 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1396 | ||
1397 | /* mask with station rate restriction */ | |
1398 | if (is_legacy(tbl->lq_type)) { | |
1399 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1400 | rate_scale_index_msk = (u16) (rate_mask & | |
02dede04 | 1401 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1402 | else |
1403 | rate_scale_index_msk = (u16) (rate_mask & | |
02dede04 | 1404 | lq_data->supp_rates); |
b481de9c ZY |
1405 | |
1406 | } else | |
1407 | rate_scale_index_msk = rate_mask; | |
1408 | ||
1409 | if (!rate_scale_index_msk) | |
1410 | rate_scale_index_msk = rate_mask; | |
1411 | ||
1412 | if (index < 0 || !((1 << index) & rate_scale_index_msk)) { | |
1413 | index = IWL_INVALID_VALUE; | |
1414 | update_lq = 1; | |
1415 | ||
01ebd063 | 1416 | /* get the lowest available rate */ |
b481de9c ZY |
1417 | for (i = 0; i <= IWL_RATE_COUNT; i++) { |
1418 | if ((1 << i) & rate_scale_index_msk) | |
1419 | index = i; | |
1420 | } | |
1421 | ||
1422 | if (index == IWL_INVALID_VALUE) { | |
1423 | IWL_WARNING("Can not find a suitable rate\n"); | |
1424 | return; | |
1425 | } | |
1426 | } | |
1427 | ||
1428 | if (!tbl->expected_tpt) | |
1429 | rs_get_expected_tpt_table(lq_data, tbl); | |
1430 | ||
1431 | window = &(tbl->win[index]); | |
1432 | ||
1433 | fail_count = window->counter - window->success_counter; | |
1434 | if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && | |
1435 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) | |
1436 | || (tbl->expected_tpt == NULL)) { | |
1437 | IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " | |
1438 | "for index %d\n", | |
1439 | window->success_counter, window->counter, index); | |
1440 | window->average_tpt = IWL_INVALID_VALUE; | |
1441 | rs_stay_in_table(lq_data); | |
1442 | if (update_lq) { | |
1443 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
02dede04 | 1444 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
b481de9c ZY |
1445 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1446 | } | |
1447 | goto out; | |
1448 | ||
1449 | } else | |
1450 | window->average_tpt = ((window->success_ratio * | |
1451 | tbl->expected_tpt[index] + 64) / 128); | |
1452 | ||
1453 | if (lq_data->search_better_tbl) { | |
1454 | int success_limit = IWL_RATE_SCALE_SWITCH; | |
1455 | ||
1456 | if ((window->success_ratio > success_limit) || | |
1457 | (window->average_tpt > lq_data->last_tpt)) { | |
1458 | if (!is_legacy(tbl->lq_type)) { | |
1459 | IWL_DEBUG_HT("LQ: we are switching to HT" | |
1460 | " rate suc %d current tpt %d" | |
1461 | " old tpt %d\n", | |
1462 | window->success_ratio, | |
1463 | window->average_tpt, | |
1464 | lq_data->last_tpt); | |
1465 | lq_data->enable_counter = 1; | |
1466 | } | |
1467 | lq_data->active_tbl = active_tbl; | |
1468 | current_tpt = window->average_tpt; | |
1469 | } else { | |
1470 | tbl->lq_type = LQ_NONE; | |
1471 | active_tbl = lq_data->active_tbl; | |
1472 | tbl = &(lq_data->lq_info[active_tbl]); | |
1473 | ||
1474 | index = iwl_rate_index_from_plcp( | |
1475 | tbl->current_rate.rate_n_flags); | |
1476 | ||
1477 | update_lq = 1; | |
1478 | current_tpt = lq_data->last_tpt; | |
1479 | IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n"); | |
1480 | } | |
1481 | lq_data->search_better_tbl = 0; | |
1482 | done_search = 1; | |
1483 | goto lq_update; | |
1484 | } | |
1485 | ||
1486 | high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, | |
1487 | tbl->lq_type); | |
1488 | low = high_low & 0xff; | |
1489 | high = (high_low >> 8) & 0xff; | |
1490 | ||
1491 | current_tpt = window->average_tpt; | |
1492 | ||
1493 | if (low != IWL_RATE_INVALID) | |
1494 | low_tpt = tbl->win[low].average_tpt; | |
1495 | ||
1496 | if (high != IWL_RATE_INVALID) | |
1497 | high_tpt = tbl->win[high].average_tpt; | |
1498 | ||
1499 | ||
1500 | scale_action = 1; | |
1501 | ||
1502 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || | |
1503 | (current_tpt == 0)) { | |
1504 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); | |
1505 | scale_action = -1; | |
1506 | } else if ((low_tpt == IWL_INVALID_VALUE) && | |
1507 | (high_tpt == IWL_INVALID_VALUE)) | |
1508 | scale_action = 1; | |
1509 | else if ((low_tpt != IWL_INVALID_VALUE) && | |
1510 | (high_tpt != IWL_INVALID_VALUE) && | |
1511 | (low_tpt < current_tpt) && | |
1512 | (high_tpt < current_tpt)) | |
1513 | scale_action = 0; | |
1514 | else { | |
1515 | if (high_tpt != IWL_INVALID_VALUE) { | |
1516 | if (high_tpt > current_tpt) | |
1517 | scale_action = 1; | |
1518 | else { | |
1519 | IWL_DEBUG_RATE | |
1520 | ("decrease rate because of high tpt\n"); | |
1521 | scale_action = -1; | |
1522 | } | |
1523 | } else if (low_tpt != IWL_INVALID_VALUE) { | |
1524 | if (low_tpt > current_tpt) { | |
1525 | IWL_DEBUG_RATE | |
1526 | ("decrease rate because of low tpt\n"); | |
1527 | scale_action = -1; | |
1528 | } else | |
1529 | scale_action = 1; | |
1530 | } | |
1531 | } | |
1532 | ||
1533 | if (scale_action == -1) { | |
1534 | if ((low != IWL_RATE_INVALID) && | |
1535 | ((window->success_ratio > IWL_RATE_HIGH_TH) || | |
1536 | (current_tpt > (100 * tbl->expected_tpt[low])))) | |
1537 | scale_action = 0; | |
1538 | } else if ((scale_action == 1) && | |
1539 | (window->success_ratio < IWL_RATE_INCREASE_TH)) | |
1540 | scale_action = 0; | |
1541 | ||
1542 | switch (scale_action) { | |
1543 | case -1: | |
1544 | if (low != IWL_RATE_INVALID) { | |
1545 | update_lq = 1; | |
1546 | index = low; | |
1547 | } | |
1548 | break; | |
1549 | case 1: | |
1550 | if (high != IWL_RATE_INVALID) { | |
1551 | update_lq = 1; | |
1552 | index = high; | |
1553 | } | |
1554 | ||
1555 | break; | |
1556 | case 0: | |
1557 | default: | |
1558 | break; | |
1559 | } | |
1560 | ||
1561 | IWL_DEBUG_HT("choose rate scale index %d action %d low %d " | |
1562 | "high %d type %d\n", | |
1563 | index, scale_action, low, high, tbl->lq_type); | |
1564 | ||
1565 | lq_update: | |
1566 | if (update_lq) { | |
1567 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
02dede04 | 1568 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
b481de9c ZY |
1569 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1570 | } | |
1571 | rs_stay_in_table(lq_data); | |
1572 | ||
1573 | if (!update_lq && !done_search && !lq_data->stay_in_tbl) { | |
1574 | lq_data->last_tpt = current_tpt; | |
1575 | ||
1576 | if (is_legacy(tbl->lq_type)) | |
1577 | rs_move_legacy_other(priv, lq_data, index); | |
1578 | else if (is_siso(tbl->lq_type)) | |
1579 | rs_move_siso_to_other(priv, lq_data, index); | |
1580 | else | |
1581 | rs_move_mimo_to_other(priv, lq_data, index); | |
1582 | ||
1583 | if (lq_data->search_better_tbl) { | |
1584 | tbl = &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1585 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1586 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1587 | ||
1588 | index = iwl_rate_index_from_plcp( | |
1589 | tbl->current_rate.rate_n_flags); | |
1590 | ||
1591 | IWL_DEBUG_HT("Switch current mcs: %X index: %d\n", | |
1592 | tbl->current_rate.rate_n_flags, index); | |
1593 | rs_fill_link_cmd(lq_data, &tbl->current_rate, | |
02dede04 | 1594 | &lq_data->lq); |
b481de9c ZY |
1595 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1596 | } | |
1597 | tbl1 = &(lq_data->lq_info[lq_data->active_tbl]); | |
1598 | ||
1599 | if (is_legacy(tbl1->lq_type) && | |
1600 | #ifdef CONFIG_IWLWIFI_HT | |
1601 | !priv->current_assoc_ht.is_ht && | |
1602 | #endif | |
1603 | (lq_data->action_counter >= 1)) { | |
1604 | lq_data->action_counter = 0; | |
1605 | IWL_DEBUG_HT("LQ: STAY in legacy table\n"); | |
1606 | rs_set_stay_in_table(1, lq_data); | |
1607 | } | |
1608 | ||
1609 | if (lq_data->enable_counter && | |
1610 | (lq_data->action_counter >= IWL_ACTION_LIMIT)) { | |
1611 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
1612 | if ((lq_data->last_tpt > TID_AGG_TPT_THREHOLD) && | |
1613 | (priv->lq_mngr.agg_ctrl.auto_agg)) { | |
1614 | priv->lq_mngr.agg_ctrl.tid_retry = | |
1615 | TID_ALL_SPECIFIED; | |
1616 | schedule_work(&priv->agg_work); | |
1617 | } | |
1618 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
1619 | lq_data->action_counter = 0; | |
1620 | rs_set_stay_in_table(0, lq_data); | |
1621 | } | |
1622 | } else { | |
1623 | if ((!update_lq) && (!done_search) && (!lq_data->flush_timer)) | |
1624 | lq_data->flush_timer = jiffies; | |
1625 | } | |
1626 | ||
1627 | out: | |
1628 | rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green); | |
1629 | i = index; | |
1630 | sta->last_txrate = i; | |
1631 | ||
1632 | /* sta->txrate is an index to A mode rates which start | |
1633 | * at IWL_FIRST_OFDM_RATE | |
1634 | */ | |
1635 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1636 | sta->txrate = i - IWL_FIRST_OFDM_RATE; | |
1637 | else | |
1638 | sta->txrate = i; | |
1639 | ||
1640 | return; | |
1641 | } | |
1642 | ||
1643 | ||
1644 | static void rs_initialize_lq(struct iwl_priv *priv, | |
1645 | struct sta_info *sta) | |
1646 | { | |
1647 | int i; | |
1648 | struct iwl_rate_scale_priv *lq; | |
1649 | struct iwl_scale_tbl_info *tbl; | |
1650 | u8 active_tbl = 0; | |
1651 | int rate_idx; | |
1652 | u8 use_green = rs_use_green(priv); | |
1653 | struct iwl_rate mcs_rate; | |
1654 | ||
1655 | if (!sta || !sta->rate_ctrl_priv) | |
1656 | goto out; | |
1657 | ||
1658 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1659 | i = sta->last_txrate; | |
1660 | ||
1661 | if ((lq->lq.sta_id == 0xff) && | |
1662 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
1663 | goto out; | |
1664 | ||
1665 | if (!lq->search_better_tbl) | |
1666 | active_tbl = lq->active_tbl; | |
1667 | else | |
1668 | active_tbl = 1 - lq->active_tbl; | |
1669 | ||
1670 | tbl = &(lq->lq_info[active_tbl]); | |
1671 | ||
1672 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
1673 | i = 0; | |
1674 | ||
1675 | mcs_rate.rate_n_flags = iwl_rates[i].plcp ; | |
1676 | mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
1677 | mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
1678 | ||
1679 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
1680 | mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK; | |
1681 | ||
1682 | tbl->antenna_type = ANT_AUX; | |
1683 | rs_get_tbl_info_from_mcs(&mcs_rate, priv->phymode, tbl, &rate_idx); | |
1684 | if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type)) | |
46640a8c | 1685 | rs_toggle_antenna(&mcs_rate, tbl); |
b481de9c ZY |
1686 | |
1687 | rs_mcs_from_tbl(&mcs_rate, tbl, rate_idx, use_green); | |
1688 | tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags; | |
1689 | rs_get_expected_tpt_table(lq, tbl); | |
02dede04 | 1690 | rs_fill_link_cmd(lq, &mcs_rate, &lq->lq); |
b481de9c ZY |
1691 | rs_send_lq_cmd(priv, &lq->lq, CMD_ASYNC); |
1692 | out: | |
1693 | return; | |
1694 | } | |
1695 | ||
1abbe498 MN |
1696 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
1697 | struct ieee80211_hw_mode *mode, struct sk_buff *skb, | |
1698 | struct rate_selection *sel) | |
b481de9c ZY |
1699 | { |
1700 | ||
1701 | int i; | |
1702 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1703 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1704 | struct sta_info *sta; | |
b481de9c ZY |
1705 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
1706 | struct iwl_rate_scale_priv *lq; | |
1707 | ||
58826351 | 1708 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 1709 | |
b481de9c ZY |
1710 | sta = sta_info_get(local, hdr->addr1); |
1711 | ||
1712 | if (!sta || !sta->rate_ctrl_priv) { | |
1abbe498 | 1713 | sel->rate = rate_lowest(local, local->oper_hw_mode, sta); |
b481de9c ZY |
1714 | if (sta) |
1715 | sta_info_put(sta); | |
1abbe498 | 1716 | return; |
b481de9c ZY |
1717 | } |
1718 | ||
1719 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1720 | i = sta->last_txrate; | |
1721 | ||
1722 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) { | |
1723 | u8 sta_id = iwl_hw_find_station(priv, hdr->addr1); | |
0795af57 | 1724 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
1725 | |
1726 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1727 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1728 | print_mac(mac, hdr->addr1)); | |
b481de9c ZY |
1729 | sta_id = iwl_add_station(priv, |
1730 | hdr->addr1, 0, CMD_ASYNC); | |
1731 | } | |
1732 | if ((sta_id != IWL_INVALID_STATION)) { | |
1733 | lq->lq.sta_id = sta_id; | |
1734 | lq->lq.rs_table[0].rate_n_flags = 0; | |
1735 | lq->ibss_sta_added = 1; | |
1736 | rs_initialize_lq(priv, sta); | |
1737 | } | |
1738 | if (!lq->ibss_sta_added) | |
1739 | goto done; | |
1740 | } | |
1741 | ||
1742 | done: | |
1abbe498 MN |
1743 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
1744 | sel->rate = rate_lowest(local, local->oper_hw_mode, sta); | |
1745 | return; | |
1746 | } | |
b481de9c | 1747 | sta_info_put(sta); |
b481de9c | 1748 | |
1abbe498 | 1749 | sel->rate = &priv->ieee_rates[i]; |
b481de9c ZY |
1750 | } |
1751 | ||
1752 | static void *rs_alloc_sta(void *priv, gfp_t gfp) | |
1753 | { | |
1754 | struct iwl_rate_scale_priv *crl; | |
1755 | int i, j; | |
1756 | ||
1757 | IWL_DEBUG_RATE("create station rate scale window\n"); | |
1758 | ||
1759 | crl = kzalloc(sizeof(struct iwl_rate_scale_priv), gfp); | |
1760 | ||
1761 | if (crl == NULL) | |
1762 | return NULL; | |
b481de9c ZY |
1763 | crl->lq.sta_id = 0xff; |
1764 | ||
63fddb9f | 1765 | |
b481de9c ZY |
1766 | for (j = 0; j < LQ_SIZE; j++) |
1767 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1768 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1769 | ||
1770 | return crl; | |
1771 | } | |
1772 | ||
1773 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
1774 | struct ieee80211_local *local, | |
1775 | struct sta_info *sta) | |
1776 | { | |
1777 | int i, j; | |
1778 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; | |
1779 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
1780 | struct iwl_rate_scale_priv *crl = priv_sta; | |
1781 | ||
b481de9c | 1782 | crl->flush_timer = 0; |
02dede04 | 1783 | crl->supp_rates = sta->supp_rates; |
b481de9c ZY |
1784 | sta->txrate = 3; |
1785 | for (j = 0; j < LQ_SIZE; j++) | |
1786 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1787 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1788 | ||
1789 | IWL_DEBUG_RATE("rate scale global init\n"); | |
1790 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
1791 | * the lowest or the highest rate.. Could consider using RSSI from | |
1792 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
1793 | * after assoc.. */ | |
1794 | ||
1795 | crl->ibss_sta_added = 0; | |
1796 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { | |
1797 | u8 sta_id = iwl_hw_find_station(priv, sta->addr); | |
0795af57 JP |
1798 | DECLARE_MAC_BUF(mac); |
1799 | ||
b481de9c | 1800 | /* for IBSS the call are from tasklet */ |
0795af57 JP |
1801 | IWL_DEBUG_HT("LQ: ADD station %s\n", |
1802 | print_mac(mac, sta->addr)); | |
b481de9c ZY |
1803 | |
1804 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1805 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1806 | print_mac(mac, sta->addr)); | |
1807 | sta_id = iwl_add_station(priv, | |
b481de9c ZY |
1808 | sta->addr, 0, CMD_ASYNC); |
1809 | } | |
1810 | if ((sta_id != IWL_INVALID_STATION)) { | |
1811 | crl->lq.sta_id = sta_id; | |
1812 | crl->lq.rs_table[0].rate_n_flags = 0; | |
1813 | } | |
1814 | /* FIXME: this is w/a remove it later */ | |
1815 | priv->assoc_station_added = 1; | |
1816 | } | |
1817 | ||
1818 | for (i = 0; i < mode->num_rates; i++) { | |
1819 | if ((sta->supp_rates & BIT(i)) && | |
1820 | (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) | |
1821 | sta->txrate = i; | |
1822 | } | |
1823 | sta->last_txrate = sta->txrate; | |
1824 | /* For MODE_IEEE80211A mode cck rate are at end | |
1825 | * rate table | |
1826 | */ | |
1827 | if (local->hw.conf.phymode == MODE_IEEE80211A) | |
1828 | sta->last_txrate += IWL_FIRST_OFDM_RATE; | |
1829 | ||
1830 | crl->is_dup = priv->is_dup; | |
1831 | crl->valid_antenna = priv->valid_antenna; | |
1832 | crl->antenna = priv->antenna; | |
1833 | crl->is_green = rs_use_green(priv); | |
1834 | crl->active_rate = priv->active_rate; | |
1835 | crl->active_rate &= ~(0x1000); | |
1836 | crl->active_rate_basic = priv->active_rate_basic; | |
1837 | crl->phymode = priv->phymode; | |
1838 | #ifdef CONFIG_IWLWIFI_HT | |
1839 | crl->active_siso_rate = (priv->current_assoc_ht.supp_rates[0] << 1); | |
1840 | crl->active_siso_rate |= (priv->current_assoc_ht.supp_rates[0] & 0x1); | |
1841 | crl->active_siso_rate &= ~((u16)0x2); | |
1842 | crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE; | |
1843 | ||
1844 | crl->active_mimo_rate = (priv->current_assoc_ht.supp_rates[1] << 1); | |
1845 | crl->active_mimo_rate |= (priv->current_assoc_ht.supp_rates[1] & 0x1); | |
1846 | crl->active_mimo_rate &= ~((u16)0x2); | |
1847 | crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE; | |
1848 | IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, | |
1849 | crl->active_mimo_rate); | |
1850 | #endif /*CONFIG_IWLWIFI_HT*/ | |
98d7e09a ZY |
1851 | #ifdef CONFIG_MAC80211_DEBUGFS |
1852 | crl->drv = priv; | |
1853 | #endif | |
b481de9c ZY |
1854 | |
1855 | if (priv->assoc_station_added) | |
1856 | priv->lq_mngr.lq_ready = 1; | |
1857 | ||
1858 | rs_initialize_lq(priv, sta); | |
1859 | } | |
1860 | ||
1b696de2 | 1861 | static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, |
b481de9c | 1862 | struct iwl_rate *tx_mcs, |
02dede04 | 1863 | struct iwl_link_quality_cmd *lq_cmd) |
b481de9c ZY |
1864 | { |
1865 | int index = 0; | |
b481de9c | 1866 | int rate_idx; |
1b696de2 | 1867 | int repeat_rate = 0; |
b481de9c ZY |
1868 | u8 ant_toggle_count = 0; |
1869 | u8 use_ht_possible = 1; | |
b481de9c ZY |
1870 | struct iwl_rate new_rate; |
1871 | struct iwl_scale_tbl_info tbl_type = { 0 }; | |
1872 | ||
98d7e09a ZY |
1873 | rs_dbgfs_set_mcs(lq_data, tx_mcs, index); |
1874 | ||
b481de9c ZY |
1875 | rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode, |
1876 | &tbl_type, &rate_idx); | |
1877 | ||
1878 | if (is_legacy(tbl_type.lq_type)) { | |
1879 | ant_toggle_count = 1; | |
1b696de2 | 1880 | repeat_rate = IWL_NUMBER_TRY; |
b481de9c | 1881 | } else |
1b696de2 | 1882 | repeat_rate = IWL_HT_NUMBER_TRY; |
b481de9c ZY |
1883 | |
1884 | lq_cmd->general_params.mimo_delimiter = | |
1885 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
1886 | lq_cmd->rs_table[index].rate_n_flags = | |
1887 | cpu_to_le32(tx_mcs->rate_n_flags); | |
1888 | new_rate.rate_n_flags = tx_mcs->rate_n_flags; | |
1889 | ||
1890 | if (is_mimo(tbl_type.lq_type) || (tbl_type.antenna_type == ANT_MAIN)) | |
1891 | lq_cmd->general_params.single_stream_ant_msk = 1; | |
1892 | else | |
1893 | lq_cmd->general_params.single_stream_ant_msk = 2; | |
1894 | ||
1895 | index++; | |
1b696de2 | 1896 | repeat_rate--; |
b481de9c ZY |
1897 | |
1898 | while (index < LINK_QUAL_MAX_RETRY_NUM) { | |
1b696de2 | 1899 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c ZY |
1900 | if (is_legacy(tbl_type.lq_type)) { |
1901 | if (ant_toggle_count < | |
1902 | NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
1903 | ant_toggle_count++; | |
1904 | else { | |
1905 | rs_toggle_antenna(&new_rate, &tbl_type); | |
1906 | ant_toggle_count = 1; | |
1907 | } | |
1908 | } | |
98d7e09a ZY |
1909 | |
1910 | rs_dbgfs_set_mcs(lq_data, &new_rate, index); | |
b481de9c ZY |
1911 | lq_cmd->rs_table[index].rate_n_flags = |
1912 | cpu_to_le32(new_rate.rate_n_flags); | |
1b696de2 | 1913 | repeat_rate--; |
b481de9c ZY |
1914 | index++; |
1915 | } | |
1916 | ||
1917 | rs_get_tbl_info_from_mcs(&new_rate, lq_data->phymode, &tbl_type, | |
1918 | &rate_idx); | |
1919 | ||
1920 | if (is_mimo(tbl_type.lq_type)) | |
1921 | lq_cmd->general_params.mimo_delimiter = index; | |
1922 | ||
1923 | rs_get_lower_rate(lq_data, &tbl_type, rate_idx, | |
02dede04 | 1924 | use_ht_possible, &new_rate); |
b481de9c ZY |
1925 | |
1926 | if (is_legacy(tbl_type.lq_type)) { | |
1927 | if (ant_toggle_count < NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
1928 | ant_toggle_count++; | |
1929 | else { | |
1930 | rs_toggle_antenna(&new_rate, &tbl_type); | |
1931 | ant_toggle_count = 1; | |
1932 | } | |
1b696de2 | 1933 | repeat_rate = IWL_NUMBER_TRY; |
b481de9c | 1934 | } else |
1b696de2 | 1935 | repeat_rate = IWL_HT_NUMBER_TRY; |
b481de9c ZY |
1936 | |
1937 | use_ht_possible = 0; | |
1938 | ||
98d7e09a | 1939 | rs_dbgfs_set_mcs(lq_data, &new_rate, index); |
b481de9c ZY |
1940 | lq_cmd->rs_table[index].rate_n_flags = |
1941 | cpu_to_le32(new_rate.rate_n_flags); | |
b481de9c ZY |
1942 | |
1943 | index++; | |
1b696de2 | 1944 | repeat_rate--; |
b481de9c ZY |
1945 | } |
1946 | ||
b481de9c ZY |
1947 | lq_cmd->general_params.dual_stream_ant_msk = 3; |
1948 | lq_cmd->agg_params.agg_dis_start_th = 3; | |
1949 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
1950 | } |
1951 | ||
1952 | static void *rs_alloc(struct ieee80211_local *local) | |
1953 | { | |
1954 | return local->hw.priv; | |
1955 | } | |
1956 | /* rate scale requires free function to be implemented */ | |
1957 | static void rs_free(void *priv_rate) | |
1958 | { | |
1959 | return; | |
1960 | } | |
1961 | ||
1962 | static void rs_clear(void *priv_rate) | |
1963 | { | |
1964 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; | |
1965 | ||
1966 | IWL_DEBUG_RATE("enter\n"); | |
1967 | ||
1968 | priv->lq_mngr.lq_ready = 0; | |
1969 | #ifdef CONFIG_IWLWIFI_HT | |
1970 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
1971 | if (priv->lq_mngr.agg_ctrl.granted_ba) | |
1972 | iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED); | |
1973 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
1974 | #endif /* CONFIG_IWLWIFI_HT */ | |
1975 | ||
1976 | IWL_DEBUG_RATE("leave\n"); | |
1977 | } | |
1978 | ||
1979 | static void rs_free_sta(void *priv, void *priv_sta) | |
1980 | { | |
1981 | struct iwl_rate_scale_priv *rs_priv = priv_sta; | |
1982 | ||
1983 | IWL_DEBUG_RATE("enter\n"); | |
1984 | kfree(rs_priv); | |
1985 | IWL_DEBUG_RATE("leave\n"); | |
1986 | } | |
1987 | ||
1988 | ||
93dc646a | 1989 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
1990 | static int open_file_generic(struct inode *inode, struct file *file) |
1991 | { | |
1992 | file->private_data = inode->i_private; | |
1993 | return 0; | |
1994 | } | |
98d7e09a ZY |
1995 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, |
1996 | struct iwl_rate *mcs, int index) | |
1997 | { | |
4457e1a4 RR |
1998 | u32 base_rate; |
1999 | ||
2000 | if (rs_priv->phymode == (u8) MODE_IEEE80211A) | |
2001 | base_rate = 0x800D; | |
2002 | else | |
2003 | base_rate = 0x820A; | |
2004 | ||
98d7e09a ZY |
2005 | if (rs_priv->dbg_fixed.rate_n_flags) { |
2006 | if (index < 12) | |
2007 | mcs->rate_n_flags = rs_priv->dbg_fixed.rate_n_flags; | |
2008 | else | |
4457e1a4 | 2009 | mcs->rate_n_flags = base_rate; |
98d7e09a ZY |
2010 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
2011 | return; | |
2012 | } | |
2013 | ||
2014 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
2015 | } | |
5ae212c9 | 2016 | |
98d7e09a ZY |
2017 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2018 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2019 | { | |
2020 | struct iwl_rate_scale_priv *rs_priv = file->private_data; | |
2021 | char buf[64]; | |
2022 | int buf_size; | |
2023 | u32 parsed_rate; | |
2024 | ||
2025 | memset(buf, 0, sizeof(buf)); | |
2026 | buf_size = min(count, sizeof(buf) - 1); | |
2027 | if (copy_from_user(buf, user_buf, buf_size)) | |
2028 | return -EFAULT; | |
2029 | ||
2030 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
2031 | rs_priv->dbg_fixed.rate_n_flags = parsed_rate; | |
2032 | else | |
2033 | rs_priv->dbg_fixed.rate_n_flags = 0; | |
2034 | ||
2035 | rs_priv->active_rate = 0x0FFF; | |
2036 | rs_priv->active_siso_rate = 0x1FD0; | |
2037 | rs_priv->active_mimo_rate = 0x1FD0; | |
2038 | ||
2039 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
2040 | rs_priv->lq.sta_id, rs_priv->dbg_fixed.rate_n_flags); | |
2041 | ||
2042 | if (rs_priv->dbg_fixed.rate_n_flags) { | |
2043 | rs_fill_link_cmd(rs_priv, &rs_priv->dbg_fixed, &rs_priv->lq); | |
2044 | rs_send_lq_cmd(rs_priv->drv, &rs_priv->lq, CMD_ASYNC); | |
2045 | } | |
2046 | ||
2047 | return count; | |
2048 | } | |
0209dc11 | 2049 | |
5ae212c9 ZY |
2050 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2051 | char __user *user_buf, size_t count, loff_t *ppos) | |
2052 | { | |
2053 | char buff[1024]; | |
2054 | int desc = 0; | |
2055 | int i = 0; | |
2056 | ||
2057 | struct iwl_rate_scale_priv *rs_priv = file->private_data; | |
2058 | ||
2059 | desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id); | |
98d7e09a | 2060 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
5ae212c9 ZY |
2061 | rs_priv->total_failed, rs_priv->total_success, |
2062 | rs_priv->active_rate); | |
98d7e09a ZY |
2063 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
2064 | rs_priv->dbg_fixed.rate_n_flags); | |
5ae212c9 ZY |
2065 | desc += sprintf(buff+desc, "general:" |
2066 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
2067 | rs_priv->lq.general_params.flags, | |
2068 | rs_priv->lq.general_params.mimo_delimiter, | |
2069 | rs_priv->lq.general_params.single_stream_ant_msk, | |
2070 | rs_priv->lq.general_params.dual_stream_ant_msk); | |
2071 | ||
2072 | desc += sprintf(buff+desc, "agg:" | |
2073 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2074 | le16_to_cpu(rs_priv->lq.agg_params.agg_time_limit), | |
2075 | rs_priv->lq.agg_params.agg_dis_start_th, | |
2076 | rs_priv->lq.agg_params.agg_frame_cnt_limit); | |
2077 | ||
2078 | desc += sprintf(buff+desc, | |
2079 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2080 | rs_priv->lq.general_params.start_rate_index[0], | |
2081 | rs_priv->lq.general_params.start_rate_index[1], | |
2082 | rs_priv->lq.general_params.start_rate_index[2], | |
2083 | rs_priv->lq.general_params.start_rate_index[3]); | |
2084 | ||
2085 | ||
2086 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2087 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
2088 | i, le32_to_cpu(rs_priv->lq.rs_table[i].rate_n_flags)); | |
2089 | ||
2090 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2091 | } | |
2092 | ||
2093 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2094 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2095 | .read = rs_sta_dbgfs_scale_table_read, |
2096 | .open = open_file_generic, | |
2097 | }; | |
0209dc11 ZY |
2098 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2099 | char __user *user_buf, size_t count, loff_t *ppos) | |
2100 | { | |
2101 | char buff[1024]; | |
2102 | int desc = 0; | |
2103 | int i, j; | |
2104 | ||
2105 | struct iwl_rate_scale_priv *rs_priv = file->private_data; | |
2106 | for (i = 0; i < LQ_SIZE; i++) { | |
2107 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2108 | "rate=0x%X\n", | |
2109 | rs_priv->active_tbl == i?"*":"x", | |
2110 | rs_priv->lq_info[i].lq_type, | |
2111 | rs_priv->lq_info[i].is_SGI, | |
2112 | rs_priv->lq_info[i].is_fat, | |
2113 | rs_priv->lq_info[i].is_dup, | |
2114 | rs_priv->lq_info[i].current_rate.rate_n_flags); | |
2115 | for (j = 0; j < IWL_RATE_COUNT; j++) { | |
2116 | desc += sprintf(buff+desc, | |
2117 | "counter=%d success=%d %%=%d\n", | |
2118 | rs_priv->lq_info[i].win[j].counter, | |
2119 | rs_priv->lq_info[i].win[j].success_counter, | |
2120 | rs_priv->lq_info[i].win[j].success_ratio); | |
2121 | } | |
2122 | } | |
2123 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2124 | } | |
2125 | ||
2126 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2127 | .read = rs_sta_dbgfs_stats_table_read, | |
2128 | .open = open_file_generic, | |
2129 | }; | |
5ae212c9 | 2130 | |
93dc646a ZY |
2131 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2132 | struct dentry *dir) | |
2133 | { | |
5ae212c9 ZY |
2134 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
2135 | rs_priv->rs_sta_dbgfs_scale_table_file = | |
0209dc11 | 2136 | debugfs_create_file("rate_scale_table", 0600, dir, |
5ae212c9 | 2137 | rs_priv, &rs_sta_dbgfs_scale_table_ops); |
0209dc11 ZY |
2138 | rs_priv->rs_sta_dbgfs_stats_table_file = |
2139 | debugfs_create_file("rate_stats_table", 0600, dir, | |
2140 | rs_priv, &rs_sta_dbgfs_stats_table_ops); | |
93dc646a ZY |
2141 | } |
2142 | ||
2143 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2144 | { | |
5ae212c9 ZY |
2145 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
2146 | debugfs_remove(rs_priv->rs_sta_dbgfs_scale_table_file); | |
0209dc11 | 2147 | debugfs_remove(rs_priv->rs_sta_dbgfs_stats_table_file); |
93dc646a ZY |
2148 | } |
2149 | #endif | |
2150 | ||
b481de9c ZY |
2151 | static struct rate_control_ops rs_ops = { |
2152 | .module = NULL, | |
2153 | .name = RS_NAME, | |
2154 | .tx_status = rs_tx_status, | |
2155 | .get_rate = rs_get_rate, | |
2156 | .rate_init = rs_rate_init, | |
2157 | .clear = rs_clear, | |
2158 | .alloc = rs_alloc, | |
2159 | .free = rs_free, | |
2160 | .alloc_sta = rs_alloc_sta, | |
2161 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2162 | #ifdef CONFIG_MAC80211_DEBUGFS |
2163 | .add_sta_debugfs = rs_add_debugfs, | |
2164 | .remove_sta_debugfs = rs_remove_debugfs, | |
2165 | #endif | |
b481de9c ZY |
2166 | }; |
2167 | ||
2168 | int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) | |
2169 | { | |
2170 | struct ieee80211_local *local = hw_to_local(hw); | |
2171 | struct iwl_priv *priv = hw->priv; | |
2172 | struct iwl_rate_scale_priv *rs_priv; | |
2173 | struct sta_info *sta; | |
2174 | int count = 0, i; | |
2175 | u32 samples = 0, success = 0, good = 0; | |
2176 | unsigned long now = jiffies; | |
2177 | u32 max_time = 0; | |
2178 | u8 lq_type, antenna; | |
2179 | ||
2180 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); | |
2181 | if (!sta || !sta->rate_ctrl_priv) { | |
2182 | if (sta) { | |
2183 | sta_info_put(sta); | |
2184 | IWL_DEBUG_RATE("leave - no private rate data!\n"); | |
2185 | } else | |
2186 | IWL_DEBUG_RATE("leave - no station!\n"); | |
2187 | return sprintf(buf, "station %d not found\n", sta_id); | |
2188 | } | |
2189 | ||
2190 | rs_priv = (void *)sta->rate_ctrl_priv; | |
2191 | ||
2192 | lq_type = rs_priv->lq_info[rs_priv->active_tbl].lq_type; | |
2193 | antenna = rs_priv->lq_info[rs_priv->active_tbl].antenna_type; | |
2194 | ||
2195 | if (is_legacy(lq_type)) | |
2196 | i = IWL_RATE_54M_INDEX; | |
2197 | else | |
2198 | i = IWL_RATE_60M_INDEX; | |
2199 | while (1) { | |
2200 | u64 mask; | |
2201 | int j; | |
2202 | int active = rs_priv->active_tbl; | |
2203 | ||
2204 | count += | |
2205 | sprintf(&buf[count], " %2dMbs: ", iwl_rates[i].ieee / 2); | |
2206 | ||
2207 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2208 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
2209 | buf[count++] = | |
2210 | (rs_priv->lq_info[active].win[i].data & mask) | |
2211 | ? '1' : '0'; | |
2212 | ||
2213 | samples += rs_priv->lq_info[active].win[i].counter; | |
2214 | good += rs_priv->lq_info[active].win[i].success_counter; | |
2215 | success += rs_priv->lq_info[active].win[i].success_counter * | |
2216 | iwl_rates[i].ieee; | |
2217 | ||
2218 | if (rs_priv->lq_info[active].win[i].stamp) { | |
2219 | int delta = | |
2220 | jiffies_to_msecs(now - | |
2221 | rs_priv->lq_info[active].win[i].stamp); | |
2222 | ||
2223 | if (delta > max_time) | |
2224 | max_time = delta; | |
2225 | ||
2226 | count += sprintf(&buf[count], "%5dms\n", delta); | |
2227 | } else | |
2228 | buf[count++] = '\n'; | |
2229 | ||
2230 | j = iwl_get_prev_ieee_rate(i); | |
2231 | if (j == i) | |
2232 | break; | |
2233 | i = j; | |
2234 | } | |
2235 | ||
2236 | /* Display the average rate of all samples taken. | |
2237 | * | |
2238 | * NOTE: We multiple # of samples by 2 since the IEEE measurement | |
2239 | * added from iwl_rates is actually 2X the rate */ | |
2240 | if (samples) | |
2241 | count += sprintf(&buf[count], | |
2242 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" | |
2243 | "%3d%% success (%d good packets over %d tries)\n", | |
2244 | success / (2 * samples), (success * 5 / samples) % 10, | |
2245 | max_time, good * 100 / samples, good, samples); | |
2246 | else | |
2247 | count += sprintf(&buf[count], "\nAverage rate: 0Mbs\n"); | |
01ebd063 | 2248 | count += sprintf(&buf[count], "\nrate scale type %d antenna %d " |
b481de9c ZY |
2249 | "active_search %d rate index %d\n", lq_type, antenna, |
2250 | rs_priv->search_better_tbl, sta->last_txrate); | |
2251 | ||
2252 | sta_info_put(sta); | |
2253 | return count; | |
2254 | } | |
2255 | ||
2256 | void iwl_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) | |
2257 | { | |
2258 | struct iwl_priv *priv = hw->priv; | |
2259 | ||
2260 | priv->lq_mngr.lq_ready = 1; | |
2261 | } | |
2262 | ||
2263 | void iwl_rate_control_register(struct ieee80211_hw *hw) | |
2264 | { | |
2265 | ieee80211_rate_control_register(&rs_ops); | |
2266 | } | |
2267 | ||
2268 | void iwl_rate_control_unregister(struct ieee80211_hw *hw) | |
2269 | { | |
2270 | ieee80211_rate_control_unregister(&rs_ops); | |
2271 | } | |
2272 |