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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 | ||
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 | 125 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a ZY |
126 | struct dentry *rs_sta_dbgfs_scale_table_file; |
127 | struct iwl_rate dbg_fixed; | |
128 | struct iwl_priv *drv; | |
5ae212c9 | 129 | #endif |
b481de9c ZY |
130 | }; |
131 | ||
132 | static void rs_rate_scale_perform(struct iwl_priv *priv, | |
133 | struct net_device *dev, | |
134 | struct ieee80211_hdr *hdr, | |
135 | struct sta_info *sta); | |
1b696de2 | 136 | static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, |
b481de9c | 137 | struct iwl_rate *tx_mcs, |
02dede04 | 138 | struct iwl_link_quality_cmd *tbl); |
b481de9c ZY |
139 | |
140 | ||
98d7e09a ZY |
141 | #ifdef CONFIG_MAC80211_DEBUGFS |
142 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, | |
143 | struct iwl_rate *mcs, int index); | |
144 | #else | |
145 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, | |
146 | struct iwl_rate *mcs, int index) | |
147 | {} | |
148 | #endif | |
b481de9c ZY |
149 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
150 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
151 | }; | |
152 | ||
153 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
154 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
155 | }; | |
156 | ||
157 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
158 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
159 | }; | |
160 | ||
161 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
162 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
163 | }; | |
164 | ||
165 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
166 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
167 | }; | |
168 | ||
169 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
170 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
171 | }; | |
172 | ||
173 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
174 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
175 | }; | |
176 | ||
177 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
178 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
179 | }; | |
180 | ||
181 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
182 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
183 | }; | |
184 | ||
185 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
186 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
187 | }; | |
188 | ||
189 | static int iwl_lq_sync_callback(struct iwl_priv *priv, | |
190 | struct iwl_cmd *cmd, struct sk_buff *skb) | |
191 | { | |
192 | /*We didn't cache the SKB; let the caller free it */ | |
193 | return 1; | |
194 | } | |
195 | ||
196 | static inline u8 iwl_rate_get_rate(u32 rate_n_flags) | |
197 | { | |
198 | return (u8)(rate_n_flags & 0xFF); | |
199 | } | |
200 | ||
201 | static int rs_send_lq_cmd(struct iwl_priv *priv, | |
202 | struct iwl_link_quality_cmd *lq, u8 flags) | |
203 | { | |
204 | #ifdef CONFIG_IWLWIFI_DEBUG | |
205 | int i; | |
206 | #endif | |
207 | int rc = -1; | |
208 | ||
209 | struct iwl_host_cmd cmd = { | |
210 | .id = REPLY_TX_LINK_QUALITY_CMD, | |
211 | .len = sizeof(struct iwl_link_quality_cmd), | |
212 | .meta.flags = flags, | |
213 | .data = lq, | |
214 | }; | |
215 | ||
216 | if ((lq->sta_id == 0xFF) && | |
217 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
218 | return rc; | |
219 | ||
220 | if (lq->sta_id == 0xFF) | |
221 | lq->sta_id = IWL_AP_ID; | |
222 | ||
223 | IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id); | |
224 | IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n", | |
225 | lq->general_params.single_stream_ant_msk, | |
226 | lq->general_params.dual_stream_ant_msk); | |
227 | #ifdef CONFIG_IWLWIFI_DEBUG | |
228 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
229 | IWL_DEBUG_RATE("lq index %d 0x%X\n", | |
230 | i, lq->rs_table[i].rate_n_flags); | |
231 | #endif | |
232 | ||
233 | if (flags & CMD_ASYNC) | |
234 | cmd.meta.u.callback = iwl_lq_sync_callback; | |
235 | ||
236 | if (iwl_is_associated(priv) && priv->assoc_station_added && | |
237 | priv->lq_mngr.lq_ready) | |
238 | rc = iwl_send_cmd(priv, &cmd); | |
239 | ||
240 | return rc; | |
241 | } | |
242 | ||
243 | static int rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) | |
244 | { | |
245 | window->data = 0; | |
246 | window->success_counter = 0; | |
247 | window->success_ratio = IWL_INVALID_VALUE; | |
248 | window->counter = 0; | |
249 | window->average_tpt = IWL_INVALID_VALUE; | |
250 | window->stamp = 0; | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, | |
256 | int scale_index, s32 tpt, u32 status) | |
257 | { | |
258 | int rc = 0; | |
259 | struct iwl_rate_scale_data *window = NULL; | |
260 | u64 mask; | |
261 | u8 win_size = IWL_RATE_MAX_WINDOW; | |
262 | s32 fail_count; | |
263 | ||
264 | if (scale_index < 0) | |
265 | return -1; | |
266 | ||
267 | if (scale_index >= IWL_RATE_COUNT) | |
268 | return -1; | |
269 | ||
270 | window = &(windows[scale_index]); | |
271 | ||
272 | if (window->counter >= win_size) { | |
273 | ||
274 | window->counter = win_size - 1; | |
275 | mask = 1; | |
276 | mask = (mask << (win_size - 1)); | |
277 | if ((window->data & mask)) { | |
278 | window->data &= ~mask; | |
279 | window->success_counter = window->success_counter - 1; | |
280 | } | |
281 | } | |
282 | ||
283 | window->counter = window->counter + 1; | |
284 | mask = window->data; | |
285 | window->data = (mask << 1); | |
286 | if (status != 0) { | |
287 | window->success_counter = window->success_counter + 1; | |
288 | window->data |= 0x1; | |
289 | } | |
290 | ||
291 | if (window->counter > 0) | |
292 | window->success_ratio = 128 * (100 * window->success_counter) | |
293 | / window->counter; | |
294 | else | |
295 | window->success_ratio = IWL_INVALID_VALUE; | |
296 | ||
297 | fail_count = window->counter - window->success_counter; | |
298 | ||
299 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || | |
300 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
301 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
302 | else | |
303 | window->average_tpt = IWL_INVALID_VALUE; | |
304 | ||
305 | window->stamp = jiffies; | |
306 | ||
307 | return rc; | |
308 | } | |
309 | ||
310 | int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, | |
311 | struct iwl_scale_tbl_info *tbl, | |
312 | int index, u8 use_green) | |
313 | { | |
314 | int rc = 0; | |
315 | ||
316 | if (is_legacy(tbl->lq_type)) { | |
317 | mcs_rate->rate_n_flags = iwl_rates[index].plcp; | |
318 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) | |
319 | mcs_rate->rate_n_flags |= RATE_MCS_CCK_MSK; | |
320 | ||
321 | } else if (is_siso(tbl->lq_type)) { | |
322 | if (index > IWL_LAST_OFDM_RATE) | |
323 | index = IWL_LAST_OFDM_RATE; | |
324 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_siso | | |
325 | RATE_MCS_HT_MSK; | |
326 | } else { | |
327 | if (index > IWL_LAST_OFDM_RATE) | |
328 | index = IWL_LAST_OFDM_RATE; | |
329 | mcs_rate->rate_n_flags = iwl_rates[index].plcp_mimo | | |
330 | RATE_MCS_HT_MSK; | |
331 | } | |
332 | ||
333 | switch (tbl->antenna_type) { | |
334 | case ANT_BOTH: | |
335 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_AB_MSK; | |
336 | break; | |
337 | case ANT_MAIN: | |
338 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
339 | break; | |
340 | case ANT_AUX: | |
341 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
342 | break; | |
343 | case ANT_NONE: | |
344 | break; | |
345 | } | |
346 | ||
347 | if (is_legacy(tbl->lq_type)) | |
348 | return rc; | |
349 | ||
350 | if (tbl->is_fat) { | |
351 | if (tbl->is_dup) | |
352 | mcs_rate->rate_n_flags |= RATE_MCS_DUP_MSK; | |
353 | else | |
354 | mcs_rate->rate_n_flags |= RATE_MCS_FAT_MSK; | |
355 | } | |
356 | if (tbl->is_SGI) | |
357 | mcs_rate->rate_n_flags |= RATE_MCS_SGI_MSK; | |
358 | ||
359 | if (use_green) { | |
360 | mcs_rate->rate_n_flags |= RATE_MCS_GF_MSK; | |
361 | if (is_siso(tbl->lq_type)) | |
362 | mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
363 | } | |
364 | return rc; | |
365 | } | |
366 | ||
367 | static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, | |
368 | int phymode, struct iwl_scale_tbl_info *tbl, | |
369 | int *rate_idx) | |
370 | { | |
371 | int index; | |
372 | u32 ant_msk; | |
373 | ||
374 | index = iwl_rate_index_from_plcp(mcs_rate->rate_n_flags); | |
375 | ||
376 | if (index == IWL_RATE_INVALID) { | |
377 | *rate_idx = -1; | |
378 | return -1; | |
379 | } | |
380 | tbl->is_SGI = 0; | |
381 | tbl->is_fat = 0; | |
382 | tbl->is_dup = 0; | |
383 | tbl->antenna_type = ANT_BOTH; | |
384 | ||
385 | if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { | |
386 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
387 | ||
388 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
389 | tbl->lq_type = LQ_NONE; | |
390 | else { | |
391 | ||
392 | if (phymode == MODE_IEEE80211A) | |
393 | tbl->lq_type = LQ_A; | |
394 | else | |
395 | tbl->lq_type = LQ_G; | |
396 | ||
397 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
398 | tbl->antenna_type = ANT_MAIN; | |
399 | else | |
400 | tbl->antenna_type = ANT_AUX; | |
401 | } | |
402 | *rate_idx = index; | |
403 | ||
404 | } else if (iwl_rate_get_rate(mcs_rate->rate_n_flags) | |
405 | <= IWL_RATE_SISO_60M_PLCP) { | |
406 | tbl->lq_type = LQ_SISO; | |
407 | ||
408 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
409 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
410 | tbl->lq_type = LQ_NONE; | |
411 | else { | |
412 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
413 | tbl->antenna_type = ANT_MAIN; | |
414 | else | |
415 | tbl->antenna_type = ANT_AUX; | |
416 | } | |
417 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
418 | tbl->is_SGI = 1; | |
419 | ||
420 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
421 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
422 | tbl->is_fat = 1; | |
423 | ||
424 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
425 | tbl->is_dup = 1; | |
426 | ||
427 | *rate_idx = index; | |
428 | } else { | |
429 | tbl->lq_type = LQ_MIMO; | |
430 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
431 | tbl->is_SGI = 1; | |
432 | ||
433 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
434 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
435 | tbl->is_fat = 1; | |
436 | ||
437 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
438 | tbl->is_dup = 1; | |
439 | *rate_idx = index; | |
440 | } | |
441 | return 0; | |
442 | } | |
443 | ||
444 | static inline void rs_toggle_antenna(struct iwl_rate *new_rate, | |
445 | struct iwl_scale_tbl_info *tbl) | |
446 | { | |
447 | if (tbl->antenna_type == ANT_AUX) { | |
448 | tbl->antenna_type = ANT_MAIN; | |
449 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_B_MSK; | |
450 | new_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
451 | } else { | |
452 | tbl->antenna_type = ANT_AUX; | |
453 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
454 | new_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
455 | } | |
456 | } | |
457 | ||
458 | static inline s8 rs_use_green(struct iwl_priv *priv) | |
459 | { | |
460 | s8 rc = 0; | |
461 | #ifdef CONFIG_IWLWIFI_HT | |
462 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
463 | return 0; | |
464 | ||
465 | if ((priv->current_assoc_ht.is_green_field) && | |
466 | !(priv->current_assoc_ht.operating_mode & 0x4)) | |
467 | rc = 1; | |
468 | #endif /*CONFIG_IWLWIFI_HT */ | |
469 | return rc; | |
470 | } | |
471 | ||
472 | /** | |
473 | * rs_get_supported_rates - get the available rates | |
474 | * | |
475 | * if management frame or broadcast frame only return | |
476 | * basic available rates. | |
477 | * | |
478 | */ | |
479 | static void rs_get_supported_rates(struct iwl_rate_scale_priv *lq_data, | |
480 | struct ieee80211_hdr *hdr, | |
481 | enum iwl_table_type rate_type, | |
482 | u16 *data_rate) | |
483 | { | |
484 | if (is_legacy(rate_type)) | |
485 | *data_rate = lq_data->active_rate; | |
486 | else { | |
487 | if (is_siso(rate_type)) | |
488 | *data_rate = lq_data->active_siso_rate; | |
489 | else | |
490 | *data_rate = lq_data->active_mimo_rate; | |
491 | } | |
492 | ||
493 | if (hdr && is_multicast_ether_addr(hdr->addr1) && | |
494 | lq_data->active_rate_basic) | |
495 | *data_rate = lq_data->active_rate_basic; | |
496 | } | |
497 | ||
498 | static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) | |
499 | { | |
500 | u8 high = IWL_RATE_INVALID; | |
501 | u8 low = IWL_RATE_INVALID; | |
502 | ||
503 | /* 802.11A or ht walks to the next literal adjascent rate in | |
504 | * the rate table */ | |
505 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
506 | int i; | |
507 | u32 mask; | |
508 | ||
509 | /* Find the previous rate that is in the rate mask */ | |
510 | i = index - 1; | |
511 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
512 | if (rate_mask & mask) { | |
513 | low = i; | |
514 | break; | |
515 | } | |
516 | } | |
517 | ||
518 | /* Find the next rate that is in the rate mask */ | |
519 | i = index + 1; | |
520 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
521 | if (rate_mask & mask) { | |
522 | high = i; | |
523 | break; | |
524 | } | |
525 | } | |
526 | ||
527 | return (high << 8) | low; | |
528 | } | |
529 | ||
530 | low = index; | |
531 | while (low != IWL_RATE_INVALID) { | |
532 | low = iwl_rates[low].prev_rs; | |
533 | if (low == IWL_RATE_INVALID) | |
534 | break; | |
535 | if (rate_mask & (1 << low)) | |
536 | break; | |
537 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
538 | } | |
539 | ||
540 | high = index; | |
541 | while (high != IWL_RATE_INVALID) { | |
542 | high = iwl_rates[high].next_rs; | |
543 | if (high == IWL_RATE_INVALID) | |
544 | break; | |
545 | if (rate_mask & (1 << high)) | |
546 | break; | |
547 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
548 | } | |
549 | ||
550 | return (high << 8) | low; | |
551 | } | |
552 | ||
553 | static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, | |
554 | struct iwl_scale_tbl_info *tbl, u8 scale_index, | |
02dede04 | 555 | u8 ht_possible, struct iwl_rate *mcs_rate) |
b481de9c | 556 | { |
b481de9c ZY |
557 | s32 low; |
558 | u16 rate_mask; | |
559 | u16 high_low; | |
560 | u8 switch_to_legacy = 0; | |
02dede04 | 561 | u8 is_green = lq_data->is_green; |
b481de9c ZY |
562 | |
563 | /* check if we need to switch from HT to legacy rates. | |
564 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
565 | * are always supported (spec demand) */ | |
566 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
567 | switch_to_legacy = 1; | |
568 | scale_index = rs_ht_to_legacy[scale_index]; | |
569 | if (lq_data->phymode == MODE_IEEE80211A) | |
570 | tbl->lq_type = LQ_A; | |
571 | else | |
572 | tbl->lq_type = LQ_G; | |
573 | ||
574 | if ((tbl->antenna_type == ANT_BOTH) || | |
575 | (tbl->antenna_type == ANT_NONE)) | |
576 | tbl->antenna_type = ANT_MAIN; | |
577 | ||
578 | tbl->is_fat = 0; | |
579 | tbl->is_SGI = 0; | |
580 | } | |
581 | ||
582 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, &rate_mask); | |
583 | ||
584 | /* mask with station rate restriction */ | |
585 | if (is_legacy(tbl->lq_type)) { | |
586 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
587 | rate_mask = (u16)(rate_mask & | |
02dede04 | 588 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 589 | else |
02dede04 | 590 | rate_mask = (u16)(rate_mask & lq_data->supp_rates); |
b481de9c ZY |
591 | } |
592 | ||
593 | /* if we did switched from HT to legacy check current rate */ | |
594 | if ((switch_to_legacy) && | |
595 | (rate_mask & (1 << scale_index))) { | |
596 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
597 | return 0; | |
598 | } | |
599 | ||
600 | high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); | |
601 | low = high_low & 0xff; | |
602 | ||
603 | if (low != IWL_RATE_INVALID) | |
604 | rs_mcs_from_tbl(mcs_rate, tbl, low, is_green); | |
605 | else | |
606 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | static void rs_tx_status(void *priv_rate, | |
612 | struct net_device *dev, | |
613 | struct sk_buff *skb, | |
614 | struct ieee80211_tx_status *tx_resp) | |
615 | { | |
616 | int status; | |
617 | u8 retries; | |
618 | int rs_index, index = 0; | |
619 | struct iwl_rate_scale_priv *lq; | |
620 | struct iwl_link_quality_cmd *table; | |
621 | struct sta_info *sta; | |
622 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
623 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
624 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
625 | struct iwl_rate_scale_data *window = NULL; | |
626 | struct iwl_rate_scale_data *search_win = NULL; | |
627 | struct iwl_rate tx_mcs; | |
628 | struct iwl_scale_tbl_info tbl_type; | |
629 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
630 | u8 active_index = 0; | |
631 | u16 fc = le16_to_cpu(hdr->frame_control); | |
632 | s32 tpt = 0; | |
633 | ||
58826351 | 634 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
635 | |
636 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
637 | return; | |
638 | ||
639 | retries = tx_resp->retry_count; | |
640 | ||
641 | if (retries > 15) | |
642 | retries = 15; | |
643 | ||
644 | ||
645 | sta = sta_info_get(local, hdr->addr1); | |
646 | ||
647 | if (!sta || !sta->rate_ctrl_priv) { | |
648 | if (sta) | |
649 | sta_info_put(sta); | |
650 | return; | |
651 | } | |
652 | ||
653 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
654 | ||
655 | if (!priv->lq_mngr.lq_ready) | |
656 | return; | |
657 | ||
658 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) | |
659 | return; | |
660 | ||
661 | table = &lq->lq; | |
662 | active_index = lq->active_tbl; | |
663 | ||
664 | lq->antenna = (lq->valid_antenna & local->hw.conf.antenna_sel_tx); | |
665 | if (!lq->antenna) | |
666 | lq->antenna = lq->valid_antenna; | |
667 | ||
668 | lq->antenna = lq->valid_antenna; | |
669 | curr_tbl = &(lq->lq_info[active_index]); | |
670 | search_tbl = &(lq->lq_info[(1 - active_index)]); | |
671 | window = (struct iwl_rate_scale_data *) | |
672 | &(curr_tbl->win[0]); | |
673 | search_win = (struct iwl_rate_scale_data *) | |
674 | &(search_tbl->win[0]); | |
675 | ||
676 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
677 | ||
678 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
679 | &tbl_type, &rs_index); | |
680 | if ((rs_index < 0) || (rs_index >= IWL_RATE_COUNT)) { | |
681 | IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n", | |
682 | rs_index, tx_mcs.rate_n_flags); | |
683 | sta_info_put(sta); | |
684 | return; | |
685 | } | |
686 | ||
687 | if (retries && | |
688 | (tx_mcs.rate_n_flags != | |
689 | le32_to_cpu(table->rs_table[0].rate_n_flags))) { | |
690 | IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n", | |
691 | tx_mcs.rate_n_flags, | |
692 | le32_to_cpu(table->rs_table[0].rate_n_flags)); | |
693 | sta_info_put(sta); | |
694 | return; | |
695 | } | |
696 | ||
697 | while (retries) { | |
698 | tx_mcs.rate_n_flags = | |
699 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
700 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
701 | &tbl_type, &rs_index); | |
702 | ||
703 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
704 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
705 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
706 | if (search_tbl->expected_tpt) | |
707 | tpt = search_tbl->expected_tpt[rs_index]; | |
708 | else | |
709 | tpt = 0; | |
710 | rs_collect_tx_data(search_win, | |
711 | rs_index, tpt, 0); | |
712 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
713 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
714 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
715 | if (curr_tbl->expected_tpt) | |
716 | tpt = curr_tbl->expected_tpt[rs_index]; | |
717 | else | |
718 | tpt = 0; | |
719 | rs_collect_tx_data(window, rs_index, tpt, 0); | |
720 | } | |
721 | if (lq->stay_in_tbl) | |
722 | lq->total_failed++; | |
723 | --retries; | |
724 | index++; | |
725 | ||
726 | } | |
727 | ||
728 | if (!tx_resp->retry_count) | |
729 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
730 | else | |
731 | tx_mcs.rate_n_flags = | |
732 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
733 | ||
734 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
735 | &tbl_type, &rs_index); | |
736 | ||
737 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) | |
738 | status = 1; | |
739 | else | |
740 | status = 0; | |
741 | ||
742 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
743 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
744 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
745 | if (search_tbl->expected_tpt) | |
746 | tpt = search_tbl->expected_tpt[rs_index]; | |
747 | else | |
748 | tpt = 0; | |
749 | rs_collect_tx_data(search_win, | |
750 | rs_index, tpt, status); | |
751 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
752 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
753 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
754 | if (curr_tbl->expected_tpt) | |
755 | tpt = curr_tbl->expected_tpt[rs_index]; | |
756 | else | |
757 | tpt = 0; | |
758 | rs_collect_tx_data(window, rs_index, tpt, status); | |
759 | } | |
760 | ||
761 | if (lq->stay_in_tbl) { | |
762 | if (status) | |
763 | lq->total_success++; | |
764 | else | |
765 | lq->total_failed++; | |
766 | } | |
767 | ||
768 | rs_rate_scale_perform(priv, dev, hdr, sta); | |
769 | sta_info_put(sta); | |
770 | return; | |
771 | } | |
772 | ||
773 | static u8 rs_is_ant_connected(u8 valid_antenna, | |
774 | enum iwl_antenna_type antenna_type) | |
775 | { | |
776 | if (antenna_type == ANT_AUX) | |
777 | return ((valid_antenna & 0x2) ? 1:0); | |
778 | else if (antenna_type == ANT_MAIN) | |
779 | return ((valid_antenna & 0x1) ? 1:0); | |
780 | else if (antenna_type == ANT_BOTH) { | |
781 | if ((valid_antenna & 0x3) == 0x3) | |
782 | return 1; | |
783 | else | |
784 | return 0; | |
785 | } | |
786 | ||
787 | return 1; | |
788 | } | |
789 | ||
790 | static u8 rs_is_other_ant_connected(u8 valid_antenna, | |
791 | enum iwl_antenna_type antenna_type) | |
792 | { | |
793 | if (antenna_type == ANT_AUX) | |
794 | return (rs_is_ant_connected(valid_antenna, ANT_MAIN)); | |
795 | else | |
796 | return (rs_is_ant_connected(valid_antenna, ANT_AUX)); | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | static void rs_set_stay_in_table(u8 is_legacy, | |
802 | struct iwl_rate_scale_priv *lq_data) | |
803 | { | |
804 | IWL_DEBUG_HT("we are staying in the same table\n"); | |
805 | lq_data->stay_in_tbl = 1; | |
806 | if (is_legacy) { | |
807 | lq_data->table_count_limit = IWL_LEGACY_TABLE_COUNT; | |
808 | lq_data->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
809 | lq_data->max_success_limit = IWL_LEGACY_TABLE_COUNT; | |
810 | } else { | |
811 | lq_data->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; | |
812 | lq_data->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
813 | lq_data->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
814 | } | |
815 | lq_data->table_count = 0; | |
816 | lq_data->total_failed = 0; | |
817 | lq_data->total_success = 0; | |
818 | } | |
819 | ||
820 | static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, | |
821 | struct iwl_scale_tbl_info *tbl) | |
822 | { | |
823 | if (is_legacy(tbl->lq_type)) { | |
824 | if (!is_a_band(tbl->lq_type)) | |
825 | tbl->expected_tpt = expected_tpt_G; | |
826 | else | |
827 | tbl->expected_tpt = expected_tpt_A; | |
828 | } else if (is_siso(tbl->lq_type)) { | |
829 | if (tbl->is_fat && !lq_data->is_dup) | |
830 | if (tbl->is_SGI) | |
831 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
832 | else | |
833 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
834 | else if (tbl->is_SGI) | |
835 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
836 | else | |
837 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
838 | ||
839 | } else if (is_mimo(tbl->lq_type)) { | |
840 | if (tbl->is_fat && !lq_data->is_dup) | |
841 | if (tbl->is_SGI) | |
842 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
843 | else | |
844 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
845 | else if (tbl->is_SGI) | |
846 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
847 | else | |
848 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
849 | } else | |
850 | tbl->expected_tpt = expected_tpt_G; | |
851 | } | |
852 | ||
853 | #ifdef CONFIG_IWLWIFI_HT | |
854 | static s32 rs_get_best_rate(struct iwl_priv *priv, | |
855 | struct iwl_rate_scale_priv *lq_data, | |
856 | struct iwl_scale_tbl_info *tbl, | |
857 | u16 rate_mask, s8 index, s8 rate) | |
858 | { | |
859 | struct iwl_scale_tbl_info *active_tbl = | |
860 | &(lq_data->lq_info[lq_data->active_tbl]); | |
861 | s32 new_rate, high, low, start_hi; | |
862 | s32 active_sr = active_tbl->win[index].success_ratio; | |
863 | s32 *tpt_tbl = tbl->expected_tpt; | |
864 | s32 active_tpt = active_tbl->expected_tpt[index]; | |
865 | u16 high_low; | |
866 | ||
867 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
868 | ||
869 | for (; ;) { | |
870 | high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); | |
871 | ||
872 | low = high_low & 0xff; | |
873 | high = (high_low >> 8) & 0xff; | |
874 | ||
875 | if ((((100 * tpt_tbl[rate]) > lq_data->last_tpt) && | |
876 | ((active_sr > IWL_RATE_DECREASE_TH) && | |
877 | (active_sr <= IWL_RATE_HIGH_TH) && | |
878 | (tpt_tbl[rate] <= active_tpt))) || | |
879 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
880 | (tpt_tbl[rate] > active_tpt))) { | |
881 | ||
882 | if (start_hi != IWL_RATE_INVALID) { | |
883 | new_rate = start_hi; | |
884 | break; | |
885 | } | |
886 | new_rate = rate; | |
887 | if (low != IWL_RATE_INVALID) | |
888 | rate = low; | |
889 | else | |
890 | break; | |
891 | } else { | |
892 | if (new_rate != IWL_RATE_INVALID) | |
893 | break; | |
894 | else if (high != IWL_RATE_INVALID) { | |
895 | start_hi = high; | |
896 | rate = high; | |
897 | } else { | |
898 | new_rate = rate; | |
899 | break; | |
900 | } | |
901 | } | |
902 | } | |
903 | ||
904 | return new_rate; | |
905 | } | |
906 | #endif /* CONFIG_IWLWIFI_HT */ | |
907 | ||
908 | static inline u8 rs_is_both_ant_supp(u8 valid_antenna) | |
909 | { | |
910 | return (rs_is_ant_connected(valid_antenna, ANT_BOTH)); | |
911 | } | |
912 | ||
913 | static int rs_switch_to_mimo(struct iwl_priv *priv, | |
914 | struct iwl_rate_scale_priv *lq_data, | |
915 | struct iwl_scale_tbl_info *tbl, int index) | |
916 | { | |
917 | int rc = -1; | |
918 | #ifdef CONFIG_IWLWIFI_HT | |
919 | u16 rate_mask; | |
920 | s32 rate; | |
921 | s8 is_green = lq_data->is_green; | |
922 | ||
923 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
924 | return -1; | |
925 | ||
926 | IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); | |
927 | tbl->lq_type = LQ_MIMO; | |
928 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
929 | &rate_mask); | |
930 | ||
931 | if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) | |
932 | return -1; | |
933 | ||
934 | if (!rs_is_both_ant_supp(lq_data->antenna)) | |
935 | return -1; | |
936 | ||
937 | rc = 0; | |
938 | tbl->is_dup = lq_data->is_dup; | |
939 | tbl->action = 0; | |
940 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
941 | tbl->is_fat = 1; | |
942 | else | |
943 | tbl->is_fat = 0; | |
944 | ||
945 | if (tbl->is_fat) { | |
946 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
947 | tbl->is_SGI = 1; | |
948 | else | |
949 | tbl->is_SGI = 0; | |
950 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
951 | tbl->is_SGI = 1; | |
952 | else | |
953 | tbl->is_SGI = 0; | |
954 | ||
955 | rs_get_expected_tpt_table(lq_data, tbl); | |
956 | ||
957 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
958 | ||
959 | IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate, rate_mask); | |
960 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) | |
961 | return -1; | |
962 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
963 | ||
964 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
965 | tbl->current_rate.rate_n_flags, is_green); | |
966 | ||
967 | #endif /*CONFIG_IWLWIFI_HT */ | |
968 | return rc; | |
969 | } | |
970 | ||
971 | static int rs_switch_to_siso(struct iwl_priv *priv, | |
972 | struct iwl_rate_scale_priv *lq_data, | |
973 | struct iwl_scale_tbl_info *tbl, int index) | |
974 | { | |
975 | int rc = -1; | |
976 | #ifdef CONFIG_IWLWIFI_HT | |
977 | u16 rate_mask; | |
978 | u8 is_green = lq_data->is_green; | |
979 | s32 rate; | |
980 | ||
981 | IWL_DEBUG_HT("LQ: try to switch to SISO\n"); | |
982 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
983 | return -1; | |
984 | ||
985 | rc = 0; | |
986 | tbl->is_dup = lq_data->is_dup; | |
987 | tbl->lq_type = LQ_SISO; | |
988 | tbl->action = 0; | |
989 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
990 | &rate_mask); | |
991 | ||
992 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
993 | tbl->is_fat = 1; | |
994 | else | |
995 | tbl->is_fat = 0; | |
996 | ||
997 | if (tbl->is_fat) { | |
998 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
999 | tbl->is_SGI = 1; | |
1000 | else | |
1001 | tbl->is_SGI = 0; | |
1002 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
1003 | tbl->is_SGI = 1; | |
1004 | else | |
1005 | tbl->is_SGI = 0; | |
1006 | ||
1007 | if (is_green) | |
1008 | tbl->is_SGI = 0; | |
1009 | ||
1010 | rs_get_expected_tpt_table(lq_data, tbl); | |
1011 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
1012 | ||
1013 | IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask); | |
1014 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
1015 | IWL_DEBUG_HT("can not switch with index %d rate mask %x\n", | |
1016 | rate, rate_mask); | |
1017 | return -1; | |
1018 | } | |
1019 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
1020 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
1021 | tbl->current_rate.rate_n_flags, is_green); | |
1022 | ||
1023 | #endif /*CONFIG_IWLWIFI_HT */ | |
1024 | return rc; | |
1025 | } | |
1026 | ||
1027 | static int rs_move_legacy_other(struct iwl_priv *priv, | |
1028 | struct iwl_rate_scale_priv *lq_data, | |
1029 | int index) | |
1030 | { | |
1031 | int rc = 0; | |
1032 | struct iwl_scale_tbl_info *tbl = | |
1033 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1034 | struct iwl_scale_tbl_info *search_tbl = | |
1035 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1036 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1037 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1038 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1039 | u8 start_action = tbl->action; | |
1040 | ||
1041 | for (; ;) { | |
1042 | switch (tbl->action) { | |
1043 | case IWL_LEGACY_SWITCH_ANTENNA: | |
1044 | IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); | |
1045 | ||
1046 | search_tbl->lq_type = LQ_NONE; | |
1047 | lq_data->action_counter++; | |
1048 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1049 | break; | |
1050 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1051 | tbl->antenna_type)) | |
1052 | break; | |
1053 | ||
1054 | memcpy(search_tbl, tbl, sz); | |
1055 | ||
1056 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1057 | search_tbl); | |
1058 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1059 | lq_data->search_better_tbl = 1; | |
1060 | goto out; | |
1061 | ||
1062 | case IWL_LEGACY_SWITCH_SISO: | |
1063 | IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); | |
1064 | memcpy(search_tbl, tbl, sz); | |
1065 | search_tbl->lq_type = LQ_SISO; | |
1066 | search_tbl->is_SGI = 0; | |
1067 | search_tbl->is_fat = 0; | |
1068 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, | |
1069 | index); | |
1070 | if (!rc) { | |
1071 | lq_data->search_better_tbl = 1; | |
1072 | lq_data->action_counter = 0; | |
1073 | } | |
1074 | if (!rc) | |
1075 | goto out; | |
1076 | ||
1077 | break; | |
1078 | case IWL_LEGACY_SWITCH_MIMO: | |
1079 | IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); | |
1080 | memcpy(search_tbl, tbl, sz); | |
1081 | search_tbl->lq_type = LQ_MIMO; | |
1082 | search_tbl->is_SGI = 0; | |
1083 | search_tbl->is_fat = 0; | |
1084 | search_tbl->antenna_type = ANT_BOTH; | |
1085 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, | |
1086 | index); | |
1087 | if (!rc) { | |
1088 | lq_data->search_better_tbl = 1; | |
1089 | lq_data->action_counter = 0; | |
1090 | } | |
1091 | if (!rc) | |
1092 | goto out; | |
1093 | break; | |
1094 | } | |
1095 | tbl->action++; | |
1096 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1097 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1098 | ||
1099 | if (tbl->action == start_action) | |
1100 | break; | |
1101 | ||
1102 | } | |
1103 | return 0; | |
1104 | ||
1105 | out: | |
1106 | tbl->action++; | |
1107 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1108 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1109 | return 0; | |
1110 | ||
1111 | } | |
1112 | ||
1113 | static int rs_move_siso_to_other(struct iwl_priv *priv, | |
1114 | struct iwl_rate_scale_priv *lq_data, | |
1115 | int index) | |
1116 | { | |
1117 | int rc = -1; | |
1118 | u8 is_green = lq_data->is_green; | |
1119 | struct iwl_scale_tbl_info *tbl = | |
1120 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1121 | struct iwl_scale_tbl_info *search_tbl = | |
1122 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1123 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1124 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1125 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1126 | u8 start_action = tbl->action; | |
1127 | ||
1128 | for (;;) { | |
1129 | lq_data->action_counter++; | |
1130 | switch (tbl->action) { | |
1131 | case IWL_SISO_SWITCH_ANTENNA: | |
1132 | IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n"); | |
1133 | search_tbl->lq_type = LQ_NONE; | |
1134 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1135 | break; | |
1136 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1137 | tbl->antenna_type)) | |
1138 | break; | |
1139 | ||
1140 | memcpy(search_tbl, tbl, sz); | |
1141 | search_tbl->action = IWL_SISO_SWITCH_MIMO; | |
1142 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1143 | search_tbl); | |
1144 | lq_data->search_better_tbl = 1; | |
1145 | ||
1146 | goto out; | |
1147 | ||
1148 | case IWL_SISO_SWITCH_MIMO: | |
1149 | IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n"); | |
1150 | memcpy(search_tbl, tbl, sz); | |
1151 | search_tbl->lq_type = LQ_MIMO; | |
1152 | search_tbl->is_SGI = 0; | |
1153 | search_tbl->is_fat = 0; | |
1154 | search_tbl->antenna_type = ANT_BOTH; | |
1155 | rc = rs_switch_to_mimo(priv, lq_data, search_tbl, | |
1156 | index); | |
1157 | if (!rc) | |
1158 | lq_data->search_better_tbl = 1; | |
1159 | ||
1160 | if (!rc) | |
1161 | goto out; | |
1162 | break; | |
1163 | case IWL_SISO_SWITCH_GI: | |
1164 | IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); | |
1165 | memcpy(search_tbl, tbl, sz); | |
1166 | search_tbl->action = 0; | |
1167 | if (search_tbl->is_SGI) | |
1168 | search_tbl->is_SGI = 0; | |
1169 | else if (!is_green) | |
1170 | search_tbl->is_SGI = 1; | |
1171 | else | |
1172 | break; | |
1173 | lq_data->search_better_tbl = 1; | |
1174 | if ((tbl->lq_type == LQ_SISO) && | |
1175 | (tbl->is_SGI)) { | |
1176 | s32 tpt = lq_data->last_tpt / 100; | |
1177 | if (((!tbl->is_fat) && | |
1178 | (tpt >= expected_tpt_siso20MHz[index])) || | |
1179 | ((tbl->is_fat) && | |
1180 | (tpt >= expected_tpt_siso40MHz[index]))) | |
1181 | lq_data->search_better_tbl = 0; | |
1182 | } | |
1183 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1184 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1185 | search_tbl, index, is_green); | |
1186 | goto out; | |
1187 | } | |
1188 | tbl->action++; | |
1189 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1190 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1191 | ||
1192 | if (tbl->action == start_action) | |
1193 | break; | |
1194 | } | |
1195 | return 0; | |
1196 | ||
1197 | out: | |
1198 | tbl->action++; | |
1199 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1200 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | static int rs_move_mimo_to_other(struct iwl_priv *priv, | |
1205 | struct iwl_rate_scale_priv *lq_data, | |
1206 | int index) | |
1207 | { | |
1208 | int rc = -1; | |
1209 | s8 is_green = lq_data->is_green; | |
1210 | struct iwl_scale_tbl_info *tbl = | |
1211 | &(lq_data->lq_info[lq_data->active_tbl]); | |
1212 | struct iwl_scale_tbl_info *search_tbl = | |
1213 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1214 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1215 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1216 | u8 start_action = tbl->action; | |
1217 | ||
1218 | for (;;) { | |
1219 | lq_data->action_counter++; | |
1220 | switch (tbl->action) { | |
1221 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1222 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
1223 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n"); | |
1224 | memcpy(search_tbl, tbl, sz); | |
1225 | search_tbl->lq_type = LQ_SISO; | |
1226 | search_tbl->is_SGI = 0; | |
1227 | search_tbl->is_fat = 0; | |
1228 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) | |
1229 | search_tbl->antenna_type = ANT_MAIN; | |
1230 | else | |
1231 | search_tbl->antenna_type = ANT_AUX; | |
1232 | ||
1233 | rc = rs_switch_to_siso(priv, lq_data, search_tbl, | |
1234 | index); | |
1235 | if (!rc) { | |
1236 | lq_data->search_better_tbl = 1; | |
1237 | goto out; | |
1238 | } | |
1239 | break; | |
1240 | ||
1241 | case IWL_MIMO_SWITCH_GI: | |
1242 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); | |
1243 | memcpy(search_tbl, tbl, sz); | |
1244 | search_tbl->lq_type = LQ_MIMO; | |
1245 | search_tbl->antenna_type = ANT_BOTH; | |
1246 | search_tbl->action = 0; | |
1247 | if (search_tbl->is_SGI) | |
1248 | search_tbl->is_SGI = 0; | |
1249 | else | |
1250 | search_tbl->is_SGI = 1; | |
1251 | lq_data->search_better_tbl = 1; | |
1252 | if ((tbl->lq_type == LQ_MIMO) && | |
1253 | (tbl->is_SGI)) { | |
1254 | s32 tpt = lq_data->last_tpt / 100; | |
1255 | if (((!tbl->is_fat) && | |
1256 | (tpt >= expected_tpt_mimo20MHz[index])) || | |
1257 | ((tbl->is_fat) && | |
1258 | (tpt >= expected_tpt_mimo40MHz[index]))) | |
1259 | lq_data->search_better_tbl = 0; | |
1260 | } | |
1261 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1262 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1263 | search_tbl, index, is_green); | |
1264 | goto out; | |
1265 | ||
1266 | } | |
1267 | tbl->action++; | |
1268 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1269 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1270 | ||
1271 | if (tbl->action == start_action) | |
1272 | break; | |
1273 | } | |
1274 | ||
1275 | return 0; | |
1276 | out: | |
1277 | tbl->action++; | |
1278 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1279 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1280 | return 0; | |
1281 | ||
1282 | } | |
1283 | ||
1284 | static void rs_stay_in_table(struct iwl_rate_scale_priv *lq_data) | |
1285 | { | |
1286 | struct iwl_scale_tbl_info *tbl; | |
1287 | int i; | |
1288 | int active_tbl; | |
1289 | int flush_interval_passed = 0; | |
1290 | ||
1291 | active_tbl = lq_data->active_tbl; | |
1292 | ||
1293 | tbl = &(lq_data->lq_info[active_tbl]); | |
1294 | ||
1295 | if (lq_data->stay_in_tbl) { | |
1296 | ||
1297 | if (lq_data->flush_timer) | |
1298 | flush_interval_passed = | |
1299 | time_after(jiffies, | |
1300 | (unsigned long)(lq_data->flush_timer + | |
1301 | IWL_RATE_SCALE_FLUSH_INTVL)); | |
1302 | ||
1303 | flush_interval_passed = 0; | |
1304 | if ((lq_data->total_failed > lq_data->max_failure_limit) || | |
1305 | (lq_data->total_success > lq_data->max_success_limit) || | |
1306 | ((!lq_data->search_better_tbl) && (lq_data->flush_timer) | |
1307 | && (flush_interval_passed))) { | |
1308 | IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:", | |
1309 | lq_data->total_failed, | |
1310 | lq_data->total_success, | |
1311 | flush_interval_passed); | |
1312 | lq_data->stay_in_tbl = 0; | |
1313 | lq_data->total_failed = 0; | |
1314 | lq_data->total_success = 0; | |
1315 | lq_data->flush_timer = 0; | |
1316 | } else if (lq_data->table_count > 0) { | |
1317 | lq_data->table_count++; | |
1318 | if (lq_data->table_count >= | |
1319 | lq_data->table_count_limit) { | |
1320 | lq_data->table_count = 0; | |
1321 | ||
1322 | IWL_DEBUG_HT("LQ: stay in table clear win\n"); | |
1323 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1324 | rs_rate_scale_clear_window( | |
1325 | &(tbl->win[i])); | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | if (!lq_data->stay_in_tbl) { | |
1330 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1331 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1332 | } | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | static void rs_rate_scale_perform(struct iwl_priv *priv, | |
1337 | struct net_device *dev, | |
1338 | struct ieee80211_hdr *hdr, | |
1339 | struct sta_info *sta) | |
1340 | { | |
1341 | int low = IWL_RATE_INVALID; | |
1342 | int high = IWL_RATE_INVALID; | |
1343 | int index; | |
1344 | int i; | |
1345 | struct iwl_rate_scale_data *window = NULL; | |
1346 | int current_tpt = IWL_INVALID_VALUE; | |
1347 | int low_tpt = IWL_INVALID_VALUE; | |
1348 | int high_tpt = IWL_INVALID_VALUE; | |
1349 | u32 fail_count; | |
1350 | s8 scale_action = 0; | |
1351 | u16 fc, rate_mask; | |
1352 | u8 update_lq = 0; | |
1353 | struct iwl_rate_scale_priv *lq_data; | |
1354 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
1355 | u16 rate_scale_index_msk = 0; | |
1356 | struct iwl_rate mcs_rate; | |
1357 | u8 is_green = 0; | |
1358 | u8 active_tbl = 0; | |
1359 | u8 done_search = 0; | |
1360 | u16 high_low; | |
1361 | ||
1362 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1363 | ||
1364 | fc = le16_to_cpu(hdr->frame_control); | |
1365 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1366 | /* Send management frames and broadcast/multicast data using | |
1367 | * lowest rate. */ | |
1368 | /* TODO: this could probably be improved.. */ | |
1369 | return; | |
1370 | } | |
1371 | ||
1372 | if (!sta || !sta->rate_ctrl_priv) | |
1373 | return; | |
1374 | ||
1375 | if (!priv->lq_mngr.lq_ready) { | |
1376 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1377 | return; | |
1378 | } | |
1379 | lq_data = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1380 | ||
1381 | if (!lq_data->search_better_tbl) | |
1382 | active_tbl = lq_data->active_tbl; | |
1383 | else | |
1384 | active_tbl = 1 - lq_data->active_tbl; | |
1385 | ||
1386 | tbl = &(lq_data->lq_info[active_tbl]); | |
1387 | is_green = lq_data->is_green; | |
1388 | ||
1389 | index = sta->last_txrate; | |
1390 | ||
1391 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1392 | tbl->lq_type); | |
1393 | ||
1394 | rs_get_supported_rates(lq_data, hdr, tbl->lq_type, | |
1395 | &rate_mask); | |
1396 | ||
1397 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1398 | ||
1399 | /* mask with station rate restriction */ | |
1400 | if (is_legacy(tbl->lq_type)) { | |
1401 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1402 | rate_scale_index_msk = (u16) (rate_mask & | |
02dede04 | 1403 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1404 | else |
1405 | rate_scale_index_msk = (u16) (rate_mask & | |
02dede04 | 1406 | lq_data->supp_rates); |
b481de9c ZY |
1407 | |
1408 | } else | |
1409 | rate_scale_index_msk = rate_mask; | |
1410 | ||
1411 | if (!rate_scale_index_msk) | |
1412 | rate_scale_index_msk = rate_mask; | |
1413 | ||
1414 | if (index < 0 || !((1 << index) & rate_scale_index_msk)) { | |
1415 | index = IWL_INVALID_VALUE; | |
1416 | update_lq = 1; | |
1417 | ||
1418 | /* get the lowest availabe rate */ | |
1419 | for (i = 0; i <= IWL_RATE_COUNT; i++) { | |
1420 | if ((1 << i) & rate_scale_index_msk) | |
1421 | index = i; | |
1422 | } | |
1423 | ||
1424 | if (index == IWL_INVALID_VALUE) { | |
1425 | IWL_WARNING("Can not find a suitable rate\n"); | |
1426 | return; | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | if (!tbl->expected_tpt) | |
1431 | rs_get_expected_tpt_table(lq_data, tbl); | |
1432 | ||
1433 | window = &(tbl->win[index]); | |
1434 | ||
1435 | fail_count = window->counter - window->success_counter; | |
1436 | if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && | |
1437 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) | |
1438 | || (tbl->expected_tpt == NULL)) { | |
1439 | IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " | |
1440 | "for index %d\n", | |
1441 | window->success_counter, window->counter, index); | |
1442 | window->average_tpt = IWL_INVALID_VALUE; | |
1443 | rs_stay_in_table(lq_data); | |
1444 | if (update_lq) { | |
1445 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
02dede04 | 1446 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
b481de9c ZY |
1447 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1448 | } | |
1449 | goto out; | |
1450 | ||
1451 | } else | |
1452 | window->average_tpt = ((window->success_ratio * | |
1453 | tbl->expected_tpt[index] + 64) / 128); | |
1454 | ||
1455 | if (lq_data->search_better_tbl) { | |
1456 | int success_limit = IWL_RATE_SCALE_SWITCH; | |
1457 | ||
1458 | if ((window->success_ratio > success_limit) || | |
1459 | (window->average_tpt > lq_data->last_tpt)) { | |
1460 | if (!is_legacy(tbl->lq_type)) { | |
1461 | IWL_DEBUG_HT("LQ: we are switching to HT" | |
1462 | " rate suc %d current tpt %d" | |
1463 | " old tpt %d\n", | |
1464 | window->success_ratio, | |
1465 | window->average_tpt, | |
1466 | lq_data->last_tpt); | |
1467 | lq_data->enable_counter = 1; | |
1468 | } | |
1469 | lq_data->active_tbl = active_tbl; | |
1470 | current_tpt = window->average_tpt; | |
1471 | } else { | |
1472 | tbl->lq_type = LQ_NONE; | |
1473 | active_tbl = lq_data->active_tbl; | |
1474 | tbl = &(lq_data->lq_info[active_tbl]); | |
1475 | ||
1476 | index = iwl_rate_index_from_plcp( | |
1477 | tbl->current_rate.rate_n_flags); | |
1478 | ||
1479 | update_lq = 1; | |
1480 | current_tpt = lq_data->last_tpt; | |
1481 | IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n"); | |
1482 | } | |
1483 | lq_data->search_better_tbl = 0; | |
1484 | done_search = 1; | |
1485 | goto lq_update; | |
1486 | } | |
1487 | ||
1488 | high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, | |
1489 | tbl->lq_type); | |
1490 | low = high_low & 0xff; | |
1491 | high = (high_low >> 8) & 0xff; | |
1492 | ||
1493 | current_tpt = window->average_tpt; | |
1494 | ||
1495 | if (low != IWL_RATE_INVALID) | |
1496 | low_tpt = tbl->win[low].average_tpt; | |
1497 | ||
1498 | if (high != IWL_RATE_INVALID) | |
1499 | high_tpt = tbl->win[high].average_tpt; | |
1500 | ||
1501 | ||
1502 | scale_action = 1; | |
1503 | ||
1504 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || | |
1505 | (current_tpt == 0)) { | |
1506 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); | |
1507 | scale_action = -1; | |
1508 | } else if ((low_tpt == IWL_INVALID_VALUE) && | |
1509 | (high_tpt == IWL_INVALID_VALUE)) | |
1510 | scale_action = 1; | |
1511 | else if ((low_tpt != IWL_INVALID_VALUE) && | |
1512 | (high_tpt != IWL_INVALID_VALUE) && | |
1513 | (low_tpt < current_tpt) && | |
1514 | (high_tpt < current_tpt)) | |
1515 | scale_action = 0; | |
1516 | else { | |
1517 | if (high_tpt != IWL_INVALID_VALUE) { | |
1518 | if (high_tpt > current_tpt) | |
1519 | scale_action = 1; | |
1520 | else { | |
1521 | IWL_DEBUG_RATE | |
1522 | ("decrease rate because of high tpt\n"); | |
1523 | scale_action = -1; | |
1524 | } | |
1525 | } else if (low_tpt != IWL_INVALID_VALUE) { | |
1526 | if (low_tpt > current_tpt) { | |
1527 | IWL_DEBUG_RATE | |
1528 | ("decrease rate because of low tpt\n"); | |
1529 | scale_action = -1; | |
1530 | } else | |
1531 | scale_action = 1; | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | if (scale_action == -1) { | |
1536 | if ((low != IWL_RATE_INVALID) && | |
1537 | ((window->success_ratio > IWL_RATE_HIGH_TH) || | |
1538 | (current_tpt > (100 * tbl->expected_tpt[low])))) | |
1539 | scale_action = 0; | |
1540 | } else if ((scale_action == 1) && | |
1541 | (window->success_ratio < IWL_RATE_INCREASE_TH)) | |
1542 | scale_action = 0; | |
1543 | ||
1544 | switch (scale_action) { | |
1545 | case -1: | |
1546 | if (low != IWL_RATE_INVALID) { | |
1547 | update_lq = 1; | |
1548 | index = low; | |
1549 | } | |
1550 | break; | |
1551 | case 1: | |
1552 | if (high != IWL_RATE_INVALID) { | |
1553 | update_lq = 1; | |
1554 | index = high; | |
1555 | } | |
1556 | ||
1557 | break; | |
1558 | case 0: | |
1559 | default: | |
1560 | break; | |
1561 | } | |
1562 | ||
1563 | IWL_DEBUG_HT("choose rate scale index %d action %d low %d " | |
1564 | "high %d type %d\n", | |
1565 | index, scale_action, low, high, tbl->lq_type); | |
1566 | ||
1567 | lq_update: | |
1568 | if (update_lq) { | |
1569 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
02dede04 | 1570 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
b481de9c ZY |
1571 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1572 | } | |
1573 | rs_stay_in_table(lq_data); | |
1574 | ||
1575 | if (!update_lq && !done_search && !lq_data->stay_in_tbl) { | |
1576 | lq_data->last_tpt = current_tpt; | |
1577 | ||
1578 | if (is_legacy(tbl->lq_type)) | |
1579 | rs_move_legacy_other(priv, lq_data, index); | |
1580 | else if (is_siso(tbl->lq_type)) | |
1581 | rs_move_siso_to_other(priv, lq_data, index); | |
1582 | else | |
1583 | rs_move_mimo_to_other(priv, lq_data, index); | |
1584 | ||
1585 | if (lq_data->search_better_tbl) { | |
1586 | tbl = &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1587 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1588 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1589 | ||
1590 | index = iwl_rate_index_from_plcp( | |
1591 | tbl->current_rate.rate_n_flags); | |
1592 | ||
1593 | IWL_DEBUG_HT("Switch current mcs: %X index: %d\n", | |
1594 | tbl->current_rate.rate_n_flags, index); | |
1595 | rs_fill_link_cmd(lq_data, &tbl->current_rate, | |
02dede04 | 1596 | &lq_data->lq); |
b481de9c ZY |
1597 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1598 | } | |
1599 | tbl1 = &(lq_data->lq_info[lq_data->active_tbl]); | |
1600 | ||
1601 | if (is_legacy(tbl1->lq_type) && | |
1602 | #ifdef CONFIG_IWLWIFI_HT | |
1603 | !priv->current_assoc_ht.is_ht && | |
1604 | #endif | |
1605 | (lq_data->action_counter >= 1)) { | |
1606 | lq_data->action_counter = 0; | |
1607 | IWL_DEBUG_HT("LQ: STAY in legacy table\n"); | |
1608 | rs_set_stay_in_table(1, lq_data); | |
1609 | } | |
1610 | ||
1611 | if (lq_data->enable_counter && | |
1612 | (lq_data->action_counter >= IWL_ACTION_LIMIT)) { | |
1613 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
1614 | if ((lq_data->last_tpt > TID_AGG_TPT_THREHOLD) && | |
1615 | (priv->lq_mngr.agg_ctrl.auto_agg)) { | |
1616 | priv->lq_mngr.agg_ctrl.tid_retry = | |
1617 | TID_ALL_SPECIFIED; | |
1618 | schedule_work(&priv->agg_work); | |
1619 | } | |
1620 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
1621 | lq_data->action_counter = 0; | |
1622 | rs_set_stay_in_table(0, lq_data); | |
1623 | } | |
1624 | } else { | |
1625 | if ((!update_lq) && (!done_search) && (!lq_data->flush_timer)) | |
1626 | lq_data->flush_timer = jiffies; | |
1627 | } | |
1628 | ||
1629 | out: | |
1630 | rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green); | |
1631 | i = index; | |
1632 | sta->last_txrate = i; | |
1633 | ||
1634 | /* sta->txrate is an index to A mode rates which start | |
1635 | * at IWL_FIRST_OFDM_RATE | |
1636 | */ | |
1637 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1638 | sta->txrate = i - IWL_FIRST_OFDM_RATE; | |
1639 | else | |
1640 | sta->txrate = i; | |
1641 | ||
1642 | return; | |
1643 | } | |
1644 | ||
1645 | ||
1646 | static void rs_initialize_lq(struct iwl_priv *priv, | |
1647 | struct sta_info *sta) | |
1648 | { | |
1649 | int i; | |
1650 | struct iwl_rate_scale_priv *lq; | |
1651 | struct iwl_scale_tbl_info *tbl; | |
1652 | u8 active_tbl = 0; | |
1653 | int rate_idx; | |
1654 | u8 use_green = rs_use_green(priv); | |
1655 | struct iwl_rate mcs_rate; | |
1656 | ||
1657 | if (!sta || !sta->rate_ctrl_priv) | |
1658 | goto out; | |
1659 | ||
1660 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1661 | i = sta->last_txrate; | |
1662 | ||
1663 | if ((lq->lq.sta_id == 0xff) && | |
1664 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
1665 | goto out; | |
1666 | ||
1667 | if (!lq->search_better_tbl) | |
1668 | active_tbl = lq->active_tbl; | |
1669 | else | |
1670 | active_tbl = 1 - lq->active_tbl; | |
1671 | ||
1672 | tbl = &(lq->lq_info[active_tbl]); | |
1673 | ||
1674 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
1675 | i = 0; | |
1676 | ||
1677 | mcs_rate.rate_n_flags = iwl_rates[i].plcp ; | |
1678 | mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
1679 | mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
1680 | ||
1681 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
1682 | mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK; | |
1683 | ||
1684 | tbl->antenna_type = ANT_AUX; | |
1685 | rs_get_tbl_info_from_mcs(&mcs_rate, priv->phymode, tbl, &rate_idx); | |
1686 | if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type)) | |
46640a8c | 1687 | rs_toggle_antenna(&mcs_rate, tbl); |
b481de9c ZY |
1688 | |
1689 | rs_mcs_from_tbl(&mcs_rate, tbl, rate_idx, use_green); | |
1690 | tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags; | |
1691 | rs_get_expected_tpt_table(lq, tbl); | |
02dede04 | 1692 | rs_fill_link_cmd(lq, &mcs_rate, &lq->lq); |
b481de9c ZY |
1693 | rs_send_lq_cmd(priv, &lq->lq, CMD_ASYNC); |
1694 | out: | |
1695 | return; | |
1696 | } | |
1697 | ||
1698 | static struct ieee80211_rate *rs_get_lowest_rate(struct ieee80211_local | |
1699 | *local) | |
1700 | { | |
1701 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; | |
1702 | int i; | |
1703 | ||
1704 | for (i = 0; i < mode->num_rates; i++) { | |
1705 | struct ieee80211_rate *rate = &mode->rates[i]; | |
1706 | ||
1707 | if (rate->flags & IEEE80211_RATE_SUPPORTED) | |
1708 | return rate; | |
1709 | } | |
1710 | ||
1711 | return &mode->rates[0]; | |
1712 | } | |
1713 | ||
1714 | static struct ieee80211_rate *rs_get_rate(void *priv_rate, | |
1715 | struct net_device *dev, | |
1716 | struct sk_buff *skb, | |
1717 | struct rate_control_extra | |
1718 | *extra) | |
1719 | { | |
1720 | ||
1721 | int i; | |
1722 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1723 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1724 | struct sta_info *sta; | |
1725 | u16 fc; | |
1726 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
1727 | struct iwl_rate_scale_priv *lq; | |
1728 | ||
58826351 | 1729 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c ZY |
1730 | |
1731 | memset(extra, 0, sizeof(*extra)); | |
1732 | ||
1733 | fc = le16_to_cpu(hdr->frame_control); | |
1734 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1735 | /* Send management frames and broadcast/multicast data using | |
1736 | * lowest rate. */ | |
1737 | /* TODO: this could probably be improved.. */ | |
1738 | return rs_get_lowest_rate(local); | |
1739 | } | |
1740 | ||
1741 | sta = sta_info_get(local, hdr->addr1); | |
1742 | ||
1743 | if (!sta || !sta->rate_ctrl_priv) { | |
1744 | if (sta) | |
1745 | sta_info_put(sta); | |
1746 | return rs_get_lowest_rate(local); | |
1747 | } | |
1748 | ||
1749 | lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; | |
1750 | i = sta->last_txrate; | |
1751 | ||
1752 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) { | |
1753 | u8 sta_id = iwl_hw_find_station(priv, hdr->addr1); | |
0795af57 | 1754 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
1755 | |
1756 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1757 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1758 | print_mac(mac, hdr->addr1)); | |
b481de9c ZY |
1759 | sta_id = iwl_add_station(priv, |
1760 | hdr->addr1, 0, CMD_ASYNC); | |
1761 | } | |
1762 | if ((sta_id != IWL_INVALID_STATION)) { | |
1763 | lq->lq.sta_id = sta_id; | |
1764 | lq->lq.rs_table[0].rate_n_flags = 0; | |
1765 | lq->ibss_sta_added = 1; | |
1766 | rs_initialize_lq(priv, sta); | |
1767 | } | |
1768 | if (!lq->ibss_sta_added) | |
1769 | goto done; | |
1770 | } | |
1771 | ||
1772 | done: | |
1773 | sta_info_put(sta); | |
1774 | if ((i < 0) || (i > IWL_RATE_COUNT)) | |
1775 | return rs_get_lowest_rate(local); | |
1776 | ||
1777 | return &priv->ieee_rates[i]; | |
1778 | } | |
1779 | ||
1780 | static void *rs_alloc_sta(void *priv, gfp_t gfp) | |
1781 | { | |
1782 | struct iwl_rate_scale_priv *crl; | |
1783 | int i, j; | |
1784 | ||
1785 | IWL_DEBUG_RATE("create station rate scale window\n"); | |
1786 | ||
1787 | crl = kzalloc(sizeof(struct iwl_rate_scale_priv), gfp); | |
1788 | ||
1789 | if (crl == NULL) | |
1790 | return NULL; | |
b481de9c ZY |
1791 | crl->lq.sta_id = 0xff; |
1792 | ||
63fddb9f | 1793 | |
b481de9c ZY |
1794 | for (j = 0; j < LQ_SIZE; j++) |
1795 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1796 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1797 | ||
1798 | return crl; | |
1799 | } | |
1800 | ||
1801 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
1802 | struct ieee80211_local *local, | |
1803 | struct sta_info *sta) | |
1804 | { | |
1805 | int i, j; | |
1806 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; | |
1807 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; | |
1808 | struct iwl_rate_scale_priv *crl = priv_sta; | |
1809 | ||
b481de9c | 1810 | crl->flush_timer = 0; |
02dede04 | 1811 | crl->supp_rates = sta->supp_rates; |
b481de9c ZY |
1812 | sta->txrate = 3; |
1813 | for (j = 0; j < LQ_SIZE; j++) | |
1814 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1815 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1816 | ||
1817 | IWL_DEBUG_RATE("rate scale global init\n"); | |
1818 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
1819 | * the lowest or the highest rate.. Could consider using RSSI from | |
1820 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
1821 | * after assoc.. */ | |
1822 | ||
1823 | crl->ibss_sta_added = 0; | |
1824 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { | |
1825 | u8 sta_id = iwl_hw_find_station(priv, sta->addr); | |
0795af57 JP |
1826 | DECLARE_MAC_BUF(mac); |
1827 | ||
b481de9c | 1828 | /* for IBSS the call are from tasklet */ |
0795af57 JP |
1829 | IWL_DEBUG_HT("LQ: ADD station %s\n", |
1830 | print_mac(mac, sta->addr)); | |
b481de9c ZY |
1831 | |
1832 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1833 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1834 | print_mac(mac, sta->addr)); | |
1835 | sta_id = iwl_add_station(priv, | |
b481de9c ZY |
1836 | sta->addr, 0, CMD_ASYNC); |
1837 | } | |
1838 | if ((sta_id != IWL_INVALID_STATION)) { | |
1839 | crl->lq.sta_id = sta_id; | |
1840 | crl->lq.rs_table[0].rate_n_flags = 0; | |
1841 | } | |
1842 | /* FIXME: this is w/a remove it later */ | |
1843 | priv->assoc_station_added = 1; | |
1844 | } | |
1845 | ||
1846 | for (i = 0; i < mode->num_rates; i++) { | |
1847 | if ((sta->supp_rates & BIT(i)) && | |
1848 | (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) | |
1849 | sta->txrate = i; | |
1850 | } | |
1851 | sta->last_txrate = sta->txrate; | |
1852 | /* For MODE_IEEE80211A mode cck rate are at end | |
1853 | * rate table | |
1854 | */ | |
1855 | if (local->hw.conf.phymode == MODE_IEEE80211A) | |
1856 | sta->last_txrate += IWL_FIRST_OFDM_RATE; | |
1857 | ||
1858 | crl->is_dup = priv->is_dup; | |
1859 | crl->valid_antenna = priv->valid_antenna; | |
1860 | crl->antenna = priv->antenna; | |
1861 | crl->is_green = rs_use_green(priv); | |
1862 | crl->active_rate = priv->active_rate; | |
1863 | crl->active_rate &= ~(0x1000); | |
1864 | crl->active_rate_basic = priv->active_rate_basic; | |
1865 | crl->phymode = priv->phymode; | |
1866 | #ifdef CONFIG_IWLWIFI_HT | |
1867 | crl->active_siso_rate = (priv->current_assoc_ht.supp_rates[0] << 1); | |
1868 | crl->active_siso_rate |= (priv->current_assoc_ht.supp_rates[0] & 0x1); | |
1869 | crl->active_siso_rate &= ~((u16)0x2); | |
1870 | crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE; | |
1871 | ||
1872 | crl->active_mimo_rate = (priv->current_assoc_ht.supp_rates[1] << 1); | |
1873 | crl->active_mimo_rate |= (priv->current_assoc_ht.supp_rates[1] & 0x1); | |
1874 | crl->active_mimo_rate &= ~((u16)0x2); | |
1875 | crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE; | |
1876 | IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, | |
1877 | crl->active_mimo_rate); | |
1878 | #endif /*CONFIG_IWLWIFI_HT*/ | |
98d7e09a ZY |
1879 | #ifdef CONFIG_MAC80211_DEBUGFS |
1880 | crl->drv = priv; | |
1881 | #endif | |
b481de9c ZY |
1882 | |
1883 | if (priv->assoc_station_added) | |
1884 | priv->lq_mngr.lq_ready = 1; | |
1885 | ||
1886 | rs_initialize_lq(priv, sta); | |
1887 | } | |
1888 | ||
1b696de2 | 1889 | static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, |
b481de9c | 1890 | struct iwl_rate *tx_mcs, |
02dede04 | 1891 | struct iwl_link_quality_cmd *lq_cmd) |
b481de9c ZY |
1892 | { |
1893 | int index = 0; | |
b481de9c | 1894 | int rate_idx; |
1b696de2 | 1895 | int repeat_rate = 0; |
b481de9c ZY |
1896 | u8 ant_toggle_count = 0; |
1897 | u8 use_ht_possible = 1; | |
b481de9c ZY |
1898 | struct iwl_rate new_rate; |
1899 | struct iwl_scale_tbl_info tbl_type = { 0 }; | |
1900 | ||
98d7e09a ZY |
1901 | rs_dbgfs_set_mcs(lq_data, tx_mcs, index); |
1902 | ||
b481de9c ZY |
1903 | rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode, |
1904 | &tbl_type, &rate_idx); | |
1905 | ||
1906 | if (is_legacy(tbl_type.lq_type)) { | |
1907 | ant_toggle_count = 1; | |
1b696de2 | 1908 | repeat_rate = IWL_NUMBER_TRY; |
b481de9c | 1909 | } else |
1b696de2 | 1910 | repeat_rate = IWL_HT_NUMBER_TRY; |
b481de9c ZY |
1911 | |
1912 | lq_cmd->general_params.mimo_delimiter = | |
1913 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
1914 | lq_cmd->rs_table[index].rate_n_flags = | |
1915 | cpu_to_le32(tx_mcs->rate_n_flags); | |
1916 | new_rate.rate_n_flags = tx_mcs->rate_n_flags; | |
1917 | ||
1918 | if (is_mimo(tbl_type.lq_type) || (tbl_type.antenna_type == ANT_MAIN)) | |
1919 | lq_cmd->general_params.single_stream_ant_msk = 1; | |
1920 | else | |
1921 | lq_cmd->general_params.single_stream_ant_msk = 2; | |
1922 | ||
1923 | index++; | |
1b696de2 | 1924 | repeat_rate--; |
b481de9c ZY |
1925 | |
1926 | while (index < LINK_QUAL_MAX_RETRY_NUM) { | |
1b696de2 | 1927 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c ZY |
1928 | if (is_legacy(tbl_type.lq_type)) { |
1929 | if (ant_toggle_count < | |
1930 | NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
1931 | ant_toggle_count++; | |
1932 | else { | |
1933 | rs_toggle_antenna(&new_rate, &tbl_type); | |
1934 | ant_toggle_count = 1; | |
1935 | } | |
1936 | } | |
98d7e09a ZY |
1937 | |
1938 | rs_dbgfs_set_mcs(lq_data, &new_rate, index); | |
b481de9c ZY |
1939 | lq_cmd->rs_table[index].rate_n_flags = |
1940 | cpu_to_le32(new_rate.rate_n_flags); | |
1b696de2 | 1941 | repeat_rate--; |
b481de9c ZY |
1942 | index++; |
1943 | } | |
1944 | ||
1945 | rs_get_tbl_info_from_mcs(&new_rate, lq_data->phymode, &tbl_type, | |
1946 | &rate_idx); | |
1947 | ||
1948 | if (is_mimo(tbl_type.lq_type)) | |
1949 | lq_cmd->general_params.mimo_delimiter = index; | |
1950 | ||
1951 | rs_get_lower_rate(lq_data, &tbl_type, rate_idx, | |
02dede04 | 1952 | use_ht_possible, &new_rate); |
b481de9c ZY |
1953 | |
1954 | if (is_legacy(tbl_type.lq_type)) { | |
1955 | if (ant_toggle_count < NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
1956 | ant_toggle_count++; | |
1957 | else { | |
1958 | rs_toggle_antenna(&new_rate, &tbl_type); | |
1959 | ant_toggle_count = 1; | |
1960 | } | |
1b696de2 | 1961 | repeat_rate = IWL_NUMBER_TRY; |
b481de9c | 1962 | } else |
1b696de2 | 1963 | repeat_rate = IWL_HT_NUMBER_TRY; |
b481de9c ZY |
1964 | |
1965 | use_ht_possible = 0; | |
1966 | ||
98d7e09a | 1967 | rs_dbgfs_set_mcs(lq_data, &new_rate, index); |
b481de9c ZY |
1968 | lq_cmd->rs_table[index].rate_n_flags = |
1969 | cpu_to_le32(new_rate.rate_n_flags); | |
b481de9c ZY |
1970 | |
1971 | index++; | |
1b696de2 | 1972 | repeat_rate--; |
b481de9c ZY |
1973 | } |
1974 | ||
b481de9c ZY |
1975 | lq_cmd->general_params.dual_stream_ant_msk = 3; |
1976 | lq_cmd->agg_params.agg_dis_start_th = 3; | |
1977 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
1978 | } |
1979 | ||
1980 | static void *rs_alloc(struct ieee80211_local *local) | |
1981 | { | |
1982 | return local->hw.priv; | |
1983 | } | |
1984 | /* rate scale requires free function to be implemented */ | |
1985 | static void rs_free(void *priv_rate) | |
1986 | { | |
1987 | return; | |
1988 | } | |
1989 | ||
1990 | static void rs_clear(void *priv_rate) | |
1991 | { | |
1992 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; | |
1993 | ||
1994 | IWL_DEBUG_RATE("enter\n"); | |
1995 | ||
1996 | priv->lq_mngr.lq_ready = 0; | |
1997 | #ifdef CONFIG_IWLWIFI_HT | |
1998 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
1999 | if (priv->lq_mngr.agg_ctrl.granted_ba) | |
2000 | iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED); | |
2001 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
2002 | #endif /* CONFIG_IWLWIFI_HT */ | |
2003 | ||
2004 | IWL_DEBUG_RATE("leave\n"); | |
2005 | } | |
2006 | ||
2007 | static void rs_free_sta(void *priv, void *priv_sta) | |
2008 | { | |
2009 | struct iwl_rate_scale_priv *rs_priv = priv_sta; | |
2010 | ||
2011 | IWL_DEBUG_RATE("enter\n"); | |
2012 | kfree(rs_priv); | |
2013 | IWL_DEBUG_RATE("leave\n"); | |
2014 | } | |
2015 | ||
2016 | ||
93dc646a | 2017 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2018 | static int open_file_generic(struct inode *inode, struct file *file) |
2019 | { | |
2020 | file->private_data = inode->i_private; | |
2021 | return 0; | |
2022 | } | |
98d7e09a ZY |
2023 | static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, |
2024 | struct iwl_rate *mcs, int index) | |
2025 | { | |
2026 | const u32 cck_rate = 0x820A; | |
2027 | if (rs_priv->dbg_fixed.rate_n_flags) { | |
2028 | if (index < 12) | |
2029 | mcs->rate_n_flags = rs_priv->dbg_fixed.rate_n_flags; | |
2030 | else | |
2031 | mcs->rate_n_flags = cck_rate; | |
2032 | IWL_DEBUG_RATE("Fixed rate ON\n"); | |
2033 | return; | |
2034 | } | |
2035 | ||
2036 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
2037 | } | |
5ae212c9 | 2038 | |
98d7e09a ZY |
2039 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2040 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2041 | { | |
2042 | struct iwl_rate_scale_priv *rs_priv = file->private_data; | |
2043 | char buf[64]; | |
2044 | int buf_size; | |
2045 | u32 parsed_rate; | |
2046 | ||
2047 | memset(buf, 0, sizeof(buf)); | |
2048 | buf_size = min(count, sizeof(buf) - 1); | |
2049 | if (copy_from_user(buf, user_buf, buf_size)) | |
2050 | return -EFAULT; | |
2051 | ||
2052 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
2053 | rs_priv->dbg_fixed.rate_n_flags = parsed_rate; | |
2054 | else | |
2055 | rs_priv->dbg_fixed.rate_n_flags = 0; | |
2056 | ||
2057 | rs_priv->active_rate = 0x0FFF; | |
2058 | rs_priv->active_siso_rate = 0x1FD0; | |
2059 | rs_priv->active_mimo_rate = 0x1FD0; | |
2060 | ||
2061 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
2062 | rs_priv->lq.sta_id, rs_priv->dbg_fixed.rate_n_flags); | |
2063 | ||
2064 | if (rs_priv->dbg_fixed.rate_n_flags) { | |
2065 | rs_fill_link_cmd(rs_priv, &rs_priv->dbg_fixed, &rs_priv->lq); | |
2066 | rs_send_lq_cmd(rs_priv->drv, &rs_priv->lq, CMD_ASYNC); | |
2067 | } | |
2068 | ||
2069 | return count; | |
2070 | } | |
5ae212c9 ZY |
2071 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2072 | char __user *user_buf, size_t count, loff_t *ppos) | |
2073 | { | |
2074 | char buff[1024]; | |
2075 | int desc = 0; | |
2076 | int i = 0; | |
2077 | ||
2078 | struct iwl_rate_scale_priv *rs_priv = file->private_data; | |
2079 | ||
2080 | desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id); | |
98d7e09a | 2081 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
5ae212c9 ZY |
2082 | rs_priv->total_failed, rs_priv->total_success, |
2083 | rs_priv->active_rate); | |
98d7e09a ZY |
2084 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
2085 | rs_priv->dbg_fixed.rate_n_flags); | |
5ae212c9 ZY |
2086 | desc += sprintf(buff+desc, "general:" |
2087 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
2088 | rs_priv->lq.general_params.flags, | |
2089 | rs_priv->lq.general_params.mimo_delimiter, | |
2090 | rs_priv->lq.general_params.single_stream_ant_msk, | |
2091 | rs_priv->lq.general_params.dual_stream_ant_msk); | |
2092 | ||
2093 | desc += sprintf(buff+desc, "agg:" | |
2094 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2095 | le16_to_cpu(rs_priv->lq.agg_params.agg_time_limit), | |
2096 | rs_priv->lq.agg_params.agg_dis_start_th, | |
2097 | rs_priv->lq.agg_params.agg_frame_cnt_limit); | |
2098 | ||
2099 | desc += sprintf(buff+desc, | |
2100 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2101 | rs_priv->lq.general_params.start_rate_index[0], | |
2102 | rs_priv->lq.general_params.start_rate_index[1], | |
2103 | rs_priv->lq.general_params.start_rate_index[2], | |
2104 | rs_priv->lq.general_params.start_rate_index[3]); | |
2105 | ||
2106 | ||
2107 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2108 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
2109 | i, le32_to_cpu(rs_priv->lq.rs_table[i].rate_n_flags)); | |
2110 | ||
2111 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2112 | } | |
2113 | ||
2114 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2115 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2116 | .read = rs_sta_dbgfs_scale_table_read, |
2117 | .open = open_file_generic, | |
2118 | }; | |
2119 | ||
93dc646a ZY |
2120 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2121 | struct dentry *dir) | |
2122 | { | |
5ae212c9 ZY |
2123 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
2124 | rs_priv->rs_sta_dbgfs_scale_table_file = | |
2125 | debugfs_create_file("rate_scale_table", 0444, dir, | |
2126 | rs_priv, &rs_sta_dbgfs_scale_table_ops); | |
93dc646a ZY |
2127 | } |
2128 | ||
2129 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2130 | { | |
5ae212c9 ZY |
2131 | struct iwl_rate_scale_priv *rs_priv = priv_sta; |
2132 | debugfs_remove(rs_priv->rs_sta_dbgfs_scale_table_file); | |
93dc646a ZY |
2133 | } |
2134 | #endif | |
2135 | ||
b481de9c ZY |
2136 | static struct rate_control_ops rs_ops = { |
2137 | .module = NULL, | |
2138 | .name = RS_NAME, | |
2139 | .tx_status = rs_tx_status, | |
2140 | .get_rate = rs_get_rate, | |
2141 | .rate_init = rs_rate_init, | |
2142 | .clear = rs_clear, | |
2143 | .alloc = rs_alloc, | |
2144 | .free = rs_free, | |
2145 | .alloc_sta = rs_alloc_sta, | |
2146 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2147 | #ifdef CONFIG_MAC80211_DEBUGFS |
2148 | .add_sta_debugfs = rs_add_debugfs, | |
2149 | .remove_sta_debugfs = rs_remove_debugfs, | |
2150 | #endif | |
b481de9c ZY |
2151 | }; |
2152 | ||
2153 | int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) | |
2154 | { | |
2155 | struct ieee80211_local *local = hw_to_local(hw); | |
2156 | struct iwl_priv *priv = hw->priv; | |
2157 | struct iwl_rate_scale_priv *rs_priv; | |
2158 | struct sta_info *sta; | |
2159 | int count = 0, i; | |
2160 | u32 samples = 0, success = 0, good = 0; | |
2161 | unsigned long now = jiffies; | |
2162 | u32 max_time = 0; | |
2163 | u8 lq_type, antenna; | |
2164 | ||
2165 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); | |
2166 | if (!sta || !sta->rate_ctrl_priv) { | |
2167 | if (sta) { | |
2168 | sta_info_put(sta); | |
2169 | IWL_DEBUG_RATE("leave - no private rate data!\n"); | |
2170 | } else | |
2171 | IWL_DEBUG_RATE("leave - no station!\n"); | |
2172 | return sprintf(buf, "station %d not found\n", sta_id); | |
2173 | } | |
2174 | ||
2175 | rs_priv = (void *)sta->rate_ctrl_priv; | |
2176 | ||
2177 | lq_type = rs_priv->lq_info[rs_priv->active_tbl].lq_type; | |
2178 | antenna = rs_priv->lq_info[rs_priv->active_tbl].antenna_type; | |
2179 | ||
2180 | if (is_legacy(lq_type)) | |
2181 | i = IWL_RATE_54M_INDEX; | |
2182 | else | |
2183 | i = IWL_RATE_60M_INDEX; | |
2184 | while (1) { | |
2185 | u64 mask; | |
2186 | int j; | |
2187 | int active = rs_priv->active_tbl; | |
2188 | ||
2189 | count += | |
2190 | sprintf(&buf[count], " %2dMbs: ", iwl_rates[i].ieee / 2); | |
2191 | ||
2192 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2193 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
2194 | buf[count++] = | |
2195 | (rs_priv->lq_info[active].win[i].data & mask) | |
2196 | ? '1' : '0'; | |
2197 | ||
2198 | samples += rs_priv->lq_info[active].win[i].counter; | |
2199 | good += rs_priv->lq_info[active].win[i].success_counter; | |
2200 | success += rs_priv->lq_info[active].win[i].success_counter * | |
2201 | iwl_rates[i].ieee; | |
2202 | ||
2203 | if (rs_priv->lq_info[active].win[i].stamp) { | |
2204 | int delta = | |
2205 | jiffies_to_msecs(now - | |
2206 | rs_priv->lq_info[active].win[i].stamp); | |
2207 | ||
2208 | if (delta > max_time) | |
2209 | max_time = delta; | |
2210 | ||
2211 | count += sprintf(&buf[count], "%5dms\n", delta); | |
2212 | } else | |
2213 | buf[count++] = '\n'; | |
2214 | ||
2215 | j = iwl_get_prev_ieee_rate(i); | |
2216 | if (j == i) | |
2217 | break; | |
2218 | i = j; | |
2219 | } | |
2220 | ||
2221 | /* Display the average rate of all samples taken. | |
2222 | * | |
2223 | * NOTE: We multiple # of samples by 2 since the IEEE measurement | |
2224 | * added from iwl_rates is actually 2X the rate */ | |
2225 | if (samples) | |
2226 | count += sprintf(&buf[count], | |
2227 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" | |
2228 | "%3d%% success (%d good packets over %d tries)\n", | |
2229 | success / (2 * samples), (success * 5 / samples) % 10, | |
2230 | max_time, good * 100 / samples, good, samples); | |
2231 | else | |
2232 | count += sprintf(&buf[count], "\nAverage rate: 0Mbs\n"); | |
2233 | count += sprintf(&buf[count], "\nrate scale type %d anntena %d " | |
2234 | "active_search %d rate index %d\n", lq_type, antenna, | |
2235 | rs_priv->search_better_tbl, sta->last_txrate); | |
2236 | ||
2237 | sta_info_put(sta); | |
2238 | return count; | |
2239 | } | |
2240 | ||
2241 | void iwl_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) | |
2242 | { | |
2243 | struct iwl_priv *priv = hw->priv; | |
2244 | ||
2245 | priv->lq_mngr.lq_ready = 1; | |
2246 | } | |
2247 | ||
2248 | void iwl_rate_control_register(struct ieee80211_hw *hw) | |
2249 | { | |
2250 | ieee80211_rate_control_register(&rs_ops); | |
2251 | } | |
2252 | ||
2253 | void iwl_rate_control_unregister(struct ieee80211_hw *hw) | |
2254 | { | |
2255 | ieee80211_rate_control_unregister(&rs_ops); | |
2256 | } | |
2257 |