Commit | Line | Data |
---|---|---|
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 | ||
b481de9c ZY |
39 | #include "../net/mac80211/ieee80211_rate.h" |
40 | ||
5d08cd1d | 41 | #include "iwl-4965.h" |
b481de9c ZY |
42 | #include "iwl-helpers.h" |
43 | ||
44 | #define RS_NAME "iwl-4965-rs" | |
45 | ||
46 | #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1 | |
47 | #define IWL_NUMBER_TRY 1 | |
48 | #define IWL_HT_NUMBER_TRY 3 | |
49 | ||
50 | #define IWL_RATE_MAX_WINDOW 62 | |
51 | #define IWL_RATE_HIGH_TH 10880 | |
52 | #define IWL_RATE_MIN_FAILURE_TH 6 | |
53 | #define IWL_RATE_MIN_SUCCESS_TH 8 | |
54 | #define IWL_RATE_DECREASE_TH 1920 | |
55 | #define IWL_RATE_INCREASE_TH 8960 | |
56 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) /*2 seconds */ | |
57 | ||
58 | static u8 rs_ht_to_legacy[] = { | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, | |
62 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
63 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
64 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
65 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
66 | }; | |
67 | ||
bb8c093b | 68 | struct iwl4965_rate { |
b481de9c ZY |
69 | u32 rate_n_flags; |
70 | } __attribute__ ((packed)); | |
71 | ||
bb8c093b | 72 | struct iwl4965_rate_scale_data { |
b481de9c ZY |
73 | u64 data; |
74 | s32 success_counter; | |
75 | s32 success_ratio; | |
76 | s32 counter; | |
77 | s32 average_tpt; | |
78 | unsigned long stamp; | |
79 | }; | |
80 | ||
bb8c093b CH |
81 | struct iwl4965_scale_tbl_info { |
82 | enum iwl4965_table_type lq_type; | |
83 | enum iwl4965_antenna_type antenna_type; | |
b481de9c ZY |
84 | u8 is_SGI; |
85 | u8 is_fat; | |
86 | u8 is_dup; | |
87 | u8 action; | |
88 | s32 *expected_tpt; | |
bb8c093b CH |
89 | struct iwl4965_rate current_rate; |
90 | struct iwl4965_rate_scale_data win[IWL_RATE_COUNT]; | |
b481de9c ZY |
91 | }; |
92 | ||
bb8c093b | 93 | struct iwl4965_rate_scale_priv { |
b481de9c ZY |
94 | u8 active_tbl; |
95 | u8 enable_counter; | |
96 | u8 stay_in_tbl; | |
97 | u8 search_better_tbl; | |
98 | s32 last_tpt; | |
99 | u32 table_count_limit; | |
100 | u32 max_failure_limit; | |
101 | u32 max_success_limit; | |
102 | u32 table_count; | |
103 | u32 total_failed; | |
104 | u32 total_success; | |
105 | u32 flush_timer; | |
106 | u8 action_counter; | |
107 | u8 antenna; | |
108 | u8 valid_antenna; | |
109 | u8 is_green; | |
110 | u8 is_dup; | |
111 | u8 phymode; | |
112 | u8 ibss_sta_added; | |
02dede04 | 113 | u32 supp_rates; |
b481de9c ZY |
114 | u16 active_rate; |
115 | u16 active_siso_rate; | |
116 | u16 active_mimo_rate; | |
117 | u16 active_rate_basic; | |
bb8c093b CH |
118 | struct iwl4965_link_quality_cmd lq; |
119 | struct iwl4965_scale_tbl_info lq_info[LQ_SIZE]; | |
5ae212c9 | 120 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 121 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 122 | struct dentry *rs_sta_dbgfs_stats_table_file; |
bb8c093b CH |
123 | struct iwl4965_rate dbg_fixed; |
124 | struct iwl4965_priv *drv; | |
5ae212c9 | 125 | #endif |
b481de9c ZY |
126 | }; |
127 | ||
bb8c093b | 128 | static void rs_rate_scale_perform(struct iwl4965_priv *priv, |
b481de9c ZY |
129 | struct net_device *dev, |
130 | struct ieee80211_hdr *hdr, | |
131 | struct sta_info *sta); | |
bb8c093b CH |
132 | static void rs_fill_link_cmd(struct iwl4965_rate_scale_priv *lq_data, |
133 | struct iwl4965_rate *tx_mcs, | |
134 | struct iwl4965_link_quality_cmd *tbl); | |
b481de9c ZY |
135 | |
136 | ||
98d7e09a | 137 | #ifdef CONFIG_MAC80211_DEBUGFS |
bb8c093b CH |
138 | static void rs_dbgfs_set_mcs(struct iwl4965_rate_scale_priv *rs_priv, |
139 | struct iwl4965_rate *mcs, int index); | |
98d7e09a | 140 | #else |
bb8c093b CH |
141 | static void rs_dbgfs_set_mcs(struct iwl4965_rate_scale_priv *rs_priv, |
142 | struct iwl4965_rate *mcs, int index) | |
98d7e09a ZY |
143 | {} |
144 | #endif | |
b481de9c ZY |
145 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
146 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
147 | }; | |
148 | ||
149 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
150 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
151 | }; | |
152 | ||
153 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
154 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
155 | }; | |
156 | ||
157 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
158 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
159 | }; | |
160 | ||
161 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
162 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
163 | }; | |
164 | ||
165 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
166 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
167 | }; | |
168 | ||
169 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
170 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
171 | }; | |
172 | ||
173 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
174 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
175 | }; | |
176 | ||
177 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
178 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
179 | }; | |
180 | ||
181 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
182 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
183 | }; | |
184 | ||
bb8c093b CH |
185 | static int iwl4965_lq_sync_callback(struct iwl4965_priv *priv, |
186 | struct iwl4965_cmd *cmd, struct sk_buff *skb) | |
b481de9c ZY |
187 | { |
188 | /*We didn't cache the SKB; let the caller free it */ | |
189 | return 1; | |
190 | } | |
191 | ||
bb8c093b | 192 | static inline u8 iwl4965_rate_get_rate(u32 rate_n_flags) |
b481de9c ZY |
193 | { |
194 | return (u8)(rate_n_flags & 0xFF); | |
195 | } | |
196 | ||
bb8c093b CH |
197 | static int rs_send_lq_cmd(struct iwl4965_priv *priv, |
198 | struct iwl4965_link_quality_cmd *lq, u8 flags) | |
b481de9c | 199 | { |
c8b0e6e1 | 200 | #ifdef CONFIG_IWL4965_DEBUG |
b481de9c ZY |
201 | int i; |
202 | #endif | |
bb8c093b | 203 | struct iwl4965_host_cmd cmd = { |
b481de9c | 204 | .id = REPLY_TX_LINK_QUALITY_CMD, |
bb8c093b | 205 | .len = sizeof(struct iwl4965_link_quality_cmd), |
b481de9c ZY |
206 | .meta.flags = flags, |
207 | .data = lq, | |
208 | }; | |
209 | ||
210 | if ((lq->sta_id == 0xFF) && | |
211 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
dc2453ae | 212 | return -EINVAL; |
b481de9c ZY |
213 | |
214 | if (lq->sta_id == 0xFF) | |
215 | lq->sta_id = IWL_AP_ID; | |
216 | ||
217 | IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id); | |
218 | IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n", | |
219 | lq->general_params.single_stream_ant_msk, | |
220 | lq->general_params.dual_stream_ant_msk); | |
c8b0e6e1 | 221 | #ifdef CONFIG_IWL4965_DEBUG |
b481de9c ZY |
222 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) |
223 | IWL_DEBUG_RATE("lq index %d 0x%X\n", | |
224 | i, lq->rs_table[i].rate_n_flags); | |
225 | #endif | |
226 | ||
227 | if (flags & CMD_ASYNC) | |
bb8c093b | 228 | cmd.meta.u.callback = iwl4965_lq_sync_callback; |
b481de9c | 229 | |
bb8c093b | 230 | if (iwl4965_is_associated(priv) && priv->assoc_station_added && |
b481de9c | 231 | priv->lq_mngr.lq_ready) |
bb8c093b | 232 | return iwl4965_send_cmd(priv, &cmd); |
b481de9c | 233 | |
dc2453ae | 234 | return 0; |
b481de9c ZY |
235 | } |
236 | ||
bb8c093b | 237 | static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window) |
b481de9c ZY |
238 | { |
239 | window->data = 0; | |
240 | window->success_counter = 0; | |
241 | window->success_ratio = IWL_INVALID_VALUE; | |
242 | window->counter = 0; | |
243 | window->average_tpt = IWL_INVALID_VALUE; | |
244 | window->stamp = 0; | |
b481de9c ZY |
245 | } |
246 | ||
bb8c093b | 247 | static int rs_collect_tx_data(struct iwl4965_rate_scale_data *windows, |
b481de9c ZY |
248 | int scale_index, s32 tpt, u32 status) |
249 | { | |
bb8c093b | 250 | struct iwl4965_rate_scale_data *window = NULL; |
b481de9c ZY |
251 | u64 mask; |
252 | u8 win_size = IWL_RATE_MAX_WINDOW; | |
253 | s32 fail_count; | |
254 | ||
dc2453ae TW |
255 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
256 | return -EINVAL; | |
b481de9c ZY |
257 | |
258 | window = &(windows[scale_index]); | |
259 | ||
260 | if (window->counter >= win_size) { | |
261 | ||
262 | window->counter = win_size - 1; | |
263 | mask = 1; | |
264 | mask = (mask << (win_size - 1)); | |
265 | if ((window->data & mask)) { | |
266 | window->data &= ~mask; | |
267 | window->success_counter = window->success_counter - 1; | |
268 | } | |
269 | } | |
270 | ||
271 | window->counter = window->counter + 1; | |
272 | mask = window->data; | |
273 | window->data = (mask << 1); | |
274 | if (status != 0) { | |
275 | window->success_counter = window->success_counter + 1; | |
276 | window->data |= 0x1; | |
277 | } | |
278 | ||
279 | if (window->counter > 0) | |
280 | window->success_ratio = 128 * (100 * window->success_counter) | |
281 | / window->counter; | |
282 | else | |
283 | window->success_ratio = IWL_INVALID_VALUE; | |
284 | ||
285 | fail_count = window->counter - window->success_counter; | |
286 | ||
287 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || | |
288 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
289 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
290 | else | |
291 | window->average_tpt = IWL_INVALID_VALUE; | |
292 | ||
293 | window->stamp = jiffies; | |
294 | ||
dc2453ae | 295 | return 0; |
b481de9c ZY |
296 | } |
297 | ||
bb8c093b CH |
298 | static void rs_mcs_from_tbl(struct iwl4965_rate *mcs_rate, |
299 | struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
300 | int index, u8 use_green) |
301 | { | |
b481de9c | 302 | if (is_legacy(tbl->lq_type)) { |
bb8c093b | 303 | mcs_rate->rate_n_flags = iwl4965_rates[index].plcp; |
b481de9c ZY |
304 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
305 | mcs_rate->rate_n_flags |= RATE_MCS_CCK_MSK; | |
306 | ||
307 | } else if (is_siso(tbl->lq_type)) { | |
308 | if (index > IWL_LAST_OFDM_RATE) | |
309 | index = IWL_LAST_OFDM_RATE; | |
bb8c093b | 310 | mcs_rate->rate_n_flags = iwl4965_rates[index].plcp_siso | |
b481de9c ZY |
311 | RATE_MCS_HT_MSK; |
312 | } else { | |
313 | if (index > IWL_LAST_OFDM_RATE) | |
314 | index = IWL_LAST_OFDM_RATE; | |
bb8c093b | 315 | mcs_rate->rate_n_flags = iwl4965_rates[index].plcp_mimo | |
b481de9c ZY |
316 | RATE_MCS_HT_MSK; |
317 | } | |
318 | ||
319 | switch (tbl->antenna_type) { | |
320 | case ANT_BOTH: | |
321 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_AB_MSK; | |
322 | break; | |
323 | case ANT_MAIN: | |
324 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
325 | break; | |
326 | case ANT_AUX: | |
327 | mcs_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
328 | break; | |
329 | case ANT_NONE: | |
330 | break; | |
331 | } | |
332 | ||
333 | if (is_legacy(tbl->lq_type)) | |
dc2453ae | 334 | return; |
b481de9c ZY |
335 | |
336 | if (tbl->is_fat) { | |
337 | if (tbl->is_dup) | |
338 | mcs_rate->rate_n_flags |= RATE_MCS_DUP_MSK; | |
339 | else | |
340 | mcs_rate->rate_n_flags |= RATE_MCS_FAT_MSK; | |
341 | } | |
342 | if (tbl->is_SGI) | |
343 | mcs_rate->rate_n_flags |= RATE_MCS_SGI_MSK; | |
344 | ||
345 | if (use_green) { | |
346 | mcs_rate->rate_n_flags |= RATE_MCS_GF_MSK; | |
347 | if (is_siso(tbl->lq_type)) | |
348 | mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
349 | } | |
b481de9c ZY |
350 | } |
351 | ||
bb8c093b CH |
352 | static int rs_get_tbl_info_from_mcs(const struct iwl4965_rate *mcs_rate, |
353 | int phymode, struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
354 | int *rate_idx) |
355 | { | |
356 | int index; | |
357 | u32 ant_msk; | |
358 | ||
bb8c093b | 359 | index = iwl4965_rate_index_from_plcp(mcs_rate->rate_n_flags); |
b481de9c ZY |
360 | |
361 | if (index == IWL_RATE_INVALID) { | |
362 | *rate_idx = -1; | |
dc2453ae | 363 | return -EINVAL; |
b481de9c ZY |
364 | } |
365 | tbl->is_SGI = 0; | |
366 | tbl->is_fat = 0; | |
367 | tbl->is_dup = 0; | |
368 | tbl->antenna_type = ANT_BOTH; | |
369 | ||
370 | if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { | |
371 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
372 | ||
373 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
374 | tbl->lq_type = LQ_NONE; | |
375 | else { | |
376 | ||
377 | if (phymode == MODE_IEEE80211A) | |
378 | tbl->lq_type = LQ_A; | |
379 | else | |
380 | tbl->lq_type = LQ_G; | |
381 | ||
382 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
383 | tbl->antenna_type = ANT_MAIN; | |
384 | else | |
385 | tbl->antenna_type = ANT_AUX; | |
386 | } | |
387 | *rate_idx = index; | |
388 | ||
bb8c093b | 389 | } else if (iwl4965_rate_get_rate(mcs_rate->rate_n_flags) |
b481de9c ZY |
390 | <= IWL_RATE_SISO_60M_PLCP) { |
391 | tbl->lq_type = LQ_SISO; | |
392 | ||
393 | ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); | |
394 | if (ant_msk == RATE_MCS_ANT_AB_MSK) | |
395 | tbl->lq_type = LQ_NONE; | |
396 | else { | |
397 | if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) | |
398 | tbl->antenna_type = ANT_MAIN; | |
399 | else | |
400 | tbl->antenna_type = ANT_AUX; | |
401 | } | |
402 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
403 | tbl->is_SGI = 1; | |
404 | ||
405 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
406 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
407 | tbl->is_fat = 1; | |
408 | ||
409 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
410 | tbl->is_dup = 1; | |
411 | ||
412 | *rate_idx = index; | |
413 | } else { | |
414 | tbl->lq_type = LQ_MIMO; | |
415 | if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) | |
416 | tbl->is_SGI = 1; | |
417 | ||
418 | if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || | |
419 | (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) | |
420 | tbl->is_fat = 1; | |
421 | ||
422 | if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) | |
423 | tbl->is_dup = 1; | |
424 | *rate_idx = index; | |
425 | } | |
426 | return 0; | |
427 | } | |
428 | ||
bb8c093b CH |
429 | static inline void rs_toggle_antenna(struct iwl4965_rate *new_rate, |
430 | struct iwl4965_scale_tbl_info *tbl) | |
b481de9c ZY |
431 | { |
432 | if (tbl->antenna_type == ANT_AUX) { | |
433 | tbl->antenna_type = ANT_MAIN; | |
434 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_B_MSK; | |
435 | new_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; | |
436 | } else { | |
437 | tbl->antenna_type = ANT_AUX; | |
438 | new_rate->rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
439 | new_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; | |
440 | } | |
441 | } | |
442 | ||
bb8c093b | 443 | static inline u8 rs_use_green(struct iwl4965_priv *priv) |
b481de9c | 444 | { |
c8b0e6e1 | 445 | #ifdef CONFIG_IWL4965_HT |
b481de9c ZY |
446 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) |
447 | return 0; | |
448 | ||
dc2453ae TW |
449 | return ((priv->current_assoc_ht.is_green_field) && |
450 | !(priv->current_assoc_ht.operating_mode & 0x4)); | |
c8b0e6e1 | 451 | #endif /*CONFIG_IWL4965_HT */ |
dc2453ae | 452 | return 0; |
b481de9c ZY |
453 | } |
454 | ||
455 | /** | |
456 | * rs_get_supported_rates - get the available rates | |
457 | * | |
458 | * if management frame or broadcast frame only return | |
459 | * basic available rates. | |
460 | * | |
461 | */ | |
bb8c093b | 462 | static void rs_get_supported_rates(struct iwl4965_rate_scale_priv *lq_data, |
b481de9c | 463 | struct ieee80211_hdr *hdr, |
bb8c093b | 464 | enum iwl4965_table_type rate_type, |
b481de9c ZY |
465 | u16 *data_rate) |
466 | { | |
467 | if (is_legacy(rate_type)) | |
468 | *data_rate = lq_data->active_rate; | |
469 | else { | |
470 | if (is_siso(rate_type)) | |
471 | *data_rate = lq_data->active_siso_rate; | |
472 | else | |
473 | *data_rate = lq_data->active_mimo_rate; | |
474 | } | |
475 | ||
476 | if (hdr && is_multicast_ether_addr(hdr->addr1) && | |
477 | lq_data->active_rate_basic) | |
478 | *data_rate = lq_data->active_rate_basic; | |
479 | } | |
480 | ||
481 | static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) | |
482 | { | |
483 | u8 high = IWL_RATE_INVALID; | |
484 | u8 low = IWL_RATE_INVALID; | |
485 | ||
01ebd063 | 486 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
487 | * the rate table */ |
488 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
489 | int i; | |
490 | u32 mask; | |
491 | ||
492 | /* Find the previous rate that is in the rate mask */ | |
493 | i = index - 1; | |
494 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
495 | if (rate_mask & mask) { | |
496 | low = i; | |
497 | break; | |
498 | } | |
499 | } | |
500 | ||
501 | /* Find the next rate that is in the rate mask */ | |
502 | i = index + 1; | |
503 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
504 | if (rate_mask & mask) { | |
505 | high = i; | |
506 | break; | |
507 | } | |
508 | } | |
509 | ||
510 | return (high << 8) | low; | |
511 | } | |
512 | ||
513 | low = index; | |
514 | while (low != IWL_RATE_INVALID) { | |
bb8c093b | 515 | low = iwl4965_rates[low].prev_rs; |
b481de9c ZY |
516 | if (low == IWL_RATE_INVALID) |
517 | break; | |
518 | if (rate_mask & (1 << low)) | |
519 | break; | |
520 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
521 | } | |
522 | ||
523 | high = index; | |
524 | while (high != IWL_RATE_INVALID) { | |
bb8c093b | 525 | high = iwl4965_rates[high].next_rs; |
b481de9c ZY |
526 | if (high == IWL_RATE_INVALID) |
527 | break; | |
528 | if (rate_mask & (1 << high)) | |
529 | break; | |
530 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
531 | } | |
532 | ||
533 | return (high << 8) | low; | |
534 | } | |
535 | ||
bb8c093b CH |
536 | static void rs_get_lower_rate(struct iwl4965_rate_scale_priv *lq_data, |
537 | struct iwl4965_scale_tbl_info *tbl, u8 scale_index, | |
538 | u8 ht_possible, struct iwl4965_rate *mcs_rate) | |
b481de9c | 539 | { |
b481de9c ZY |
540 | s32 low; |
541 | u16 rate_mask; | |
542 | u16 high_low; | |
543 | u8 switch_to_legacy = 0; | |
02dede04 | 544 | u8 is_green = lq_data->is_green; |
b481de9c ZY |
545 | |
546 | /* check if we need to switch from HT to legacy rates. | |
547 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
548 | * are always supported (spec demand) */ | |
549 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
550 | switch_to_legacy = 1; | |
551 | scale_index = rs_ht_to_legacy[scale_index]; | |
552 | if (lq_data->phymode == MODE_IEEE80211A) | |
553 | tbl->lq_type = LQ_A; | |
554 | else | |
555 | tbl->lq_type = LQ_G; | |
556 | ||
557 | if ((tbl->antenna_type == ANT_BOTH) || | |
558 | (tbl->antenna_type == ANT_NONE)) | |
559 | tbl->antenna_type = ANT_MAIN; | |
560 | ||
561 | tbl->is_fat = 0; | |
562 | tbl->is_SGI = 0; | |
563 | } | |
564 | ||
565 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, &rate_mask); | |
566 | ||
567 | /* mask with station rate restriction */ | |
568 | if (is_legacy(tbl->lq_type)) { | |
569 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
570 | rate_mask = (u16)(rate_mask & | |
02dede04 | 571 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 572 | else |
02dede04 | 573 | rate_mask = (u16)(rate_mask & lq_data->supp_rates); |
b481de9c ZY |
574 | } |
575 | ||
576 | /* if we did switched from HT to legacy check current rate */ | |
dc2453ae | 577 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
b481de9c | 578 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); |
dc2453ae | 579 | return; |
b481de9c ZY |
580 | } |
581 | ||
582 | high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); | |
583 | low = high_low & 0xff; | |
584 | ||
585 | if (low != IWL_RATE_INVALID) | |
586 | rs_mcs_from_tbl(mcs_rate, tbl, low, is_green); | |
587 | else | |
588 | rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); | |
b481de9c ZY |
589 | } |
590 | ||
591 | static void rs_tx_status(void *priv_rate, | |
592 | struct net_device *dev, | |
593 | struct sk_buff *skb, | |
594 | struct ieee80211_tx_status *tx_resp) | |
595 | { | |
596 | int status; | |
597 | u8 retries; | |
598 | int rs_index, index = 0; | |
bb8c093b CH |
599 | struct iwl4965_rate_scale_priv *lq; |
600 | struct iwl4965_link_quality_cmd *table; | |
b481de9c ZY |
601 | struct sta_info *sta; |
602 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
bb8c093b | 603 | struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; |
b481de9c | 604 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
bb8c093b CH |
605 | struct iwl4965_rate_scale_data *window = NULL; |
606 | struct iwl4965_rate_scale_data *search_win = NULL; | |
607 | struct iwl4965_rate tx_mcs; | |
608 | struct iwl4965_scale_tbl_info tbl_type; | |
609 | struct iwl4965_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c ZY |
610 | u8 active_index = 0; |
611 | u16 fc = le16_to_cpu(hdr->frame_control); | |
612 | s32 tpt = 0; | |
613 | ||
58826351 | 614 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
615 | |
616 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
617 | return; | |
618 | ||
619 | retries = tx_resp->retry_count; | |
620 | ||
621 | if (retries > 15) | |
622 | retries = 15; | |
623 | ||
624 | ||
625 | sta = sta_info_get(local, hdr->addr1); | |
626 | ||
627 | if (!sta || !sta->rate_ctrl_priv) { | |
628 | if (sta) | |
629 | sta_info_put(sta); | |
630 | return; | |
631 | } | |
632 | ||
bb8c093b | 633 | lq = (struct iwl4965_rate_scale_priv *)sta->rate_ctrl_priv; |
b481de9c ZY |
634 | |
635 | if (!priv->lq_mngr.lq_ready) | |
636 | return; | |
637 | ||
638 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) | |
639 | return; | |
640 | ||
641 | table = &lq->lq; | |
642 | active_index = lq->active_tbl; | |
643 | ||
644 | lq->antenna = (lq->valid_antenna & local->hw.conf.antenna_sel_tx); | |
645 | if (!lq->antenna) | |
646 | lq->antenna = lq->valid_antenna; | |
647 | ||
648 | lq->antenna = lq->valid_antenna; | |
649 | curr_tbl = &(lq->lq_info[active_index]); | |
650 | search_tbl = &(lq->lq_info[(1 - active_index)]); | |
bb8c093b | 651 | window = (struct iwl4965_rate_scale_data *) |
b481de9c | 652 | &(curr_tbl->win[0]); |
bb8c093b | 653 | search_win = (struct iwl4965_rate_scale_data *) |
b481de9c ZY |
654 | &(search_tbl->win[0]); |
655 | ||
656 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
657 | ||
658 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
659 | &tbl_type, &rs_index); | |
660 | if ((rs_index < 0) || (rs_index >= IWL_RATE_COUNT)) { | |
661 | IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n", | |
662 | rs_index, tx_mcs.rate_n_flags); | |
663 | sta_info_put(sta); | |
664 | return; | |
665 | } | |
666 | ||
667 | if (retries && | |
668 | (tx_mcs.rate_n_flags != | |
669 | le32_to_cpu(table->rs_table[0].rate_n_flags))) { | |
670 | IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n", | |
671 | tx_mcs.rate_n_flags, | |
672 | le32_to_cpu(table->rs_table[0].rate_n_flags)); | |
673 | sta_info_put(sta); | |
674 | return; | |
675 | } | |
676 | ||
677 | while (retries) { | |
678 | tx_mcs.rate_n_flags = | |
679 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
680 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
681 | &tbl_type, &rs_index); | |
682 | ||
683 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
684 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
685 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
686 | if (search_tbl->expected_tpt) | |
687 | tpt = search_tbl->expected_tpt[rs_index]; | |
688 | else | |
689 | tpt = 0; | |
690 | rs_collect_tx_data(search_win, | |
691 | rs_index, tpt, 0); | |
692 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
693 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
694 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
695 | if (curr_tbl->expected_tpt) | |
696 | tpt = curr_tbl->expected_tpt[rs_index]; | |
697 | else | |
698 | tpt = 0; | |
699 | rs_collect_tx_data(window, rs_index, tpt, 0); | |
700 | } | |
701 | if (lq->stay_in_tbl) | |
702 | lq->total_failed++; | |
703 | --retries; | |
704 | index++; | |
705 | ||
706 | } | |
707 | ||
708 | if (!tx_resp->retry_count) | |
709 | tx_mcs.rate_n_flags = tx_resp->control.tx_rate; | |
710 | else | |
711 | tx_mcs.rate_n_flags = | |
712 | le32_to_cpu(table->rs_table[index].rate_n_flags); | |
713 | ||
714 | rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, | |
715 | &tbl_type, &rs_index); | |
716 | ||
717 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) | |
718 | status = 1; | |
719 | else | |
720 | status = 0; | |
721 | ||
722 | if ((tbl_type.lq_type == search_tbl->lq_type) && | |
723 | (tbl_type.antenna_type == search_tbl->antenna_type) && | |
724 | (tbl_type.is_SGI == search_tbl->is_SGI)) { | |
725 | if (search_tbl->expected_tpt) | |
726 | tpt = search_tbl->expected_tpt[rs_index]; | |
727 | else | |
728 | tpt = 0; | |
729 | rs_collect_tx_data(search_win, | |
730 | rs_index, tpt, status); | |
731 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && | |
732 | (tbl_type.antenna_type == curr_tbl->antenna_type) && | |
733 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { | |
734 | if (curr_tbl->expected_tpt) | |
735 | tpt = curr_tbl->expected_tpt[rs_index]; | |
736 | else | |
737 | tpt = 0; | |
738 | rs_collect_tx_data(window, rs_index, tpt, status); | |
739 | } | |
740 | ||
741 | if (lq->stay_in_tbl) { | |
742 | if (status) | |
743 | lq->total_success++; | |
744 | else | |
745 | lq->total_failed++; | |
746 | } | |
747 | ||
748 | rs_rate_scale_perform(priv, dev, hdr, sta); | |
749 | sta_info_put(sta); | |
750 | return; | |
751 | } | |
752 | ||
753 | static u8 rs_is_ant_connected(u8 valid_antenna, | |
bb8c093b | 754 | enum iwl4965_antenna_type antenna_type) |
b481de9c ZY |
755 | { |
756 | if (antenna_type == ANT_AUX) | |
757 | return ((valid_antenna & 0x2) ? 1:0); | |
758 | else if (antenna_type == ANT_MAIN) | |
759 | return ((valid_antenna & 0x1) ? 1:0); | |
dc2453ae TW |
760 | else if (antenna_type == ANT_BOTH) |
761 | return ((valid_antenna & 0x3) == 0x3); | |
b481de9c ZY |
762 | |
763 | return 1; | |
764 | } | |
765 | ||
766 | static u8 rs_is_other_ant_connected(u8 valid_antenna, | |
bb8c093b | 767 | enum iwl4965_antenna_type antenna_type) |
b481de9c ZY |
768 | { |
769 | if (antenna_type == ANT_AUX) | |
dc2453ae | 770 | return rs_is_ant_connected(valid_antenna, ANT_MAIN); |
b481de9c | 771 | else |
dc2453ae | 772 | return rs_is_ant_connected(valid_antenna, ANT_AUX); |
b481de9c ZY |
773 | |
774 | return 0; | |
775 | } | |
776 | ||
777 | static void rs_set_stay_in_table(u8 is_legacy, | |
bb8c093b | 778 | struct iwl4965_rate_scale_priv *lq_data) |
b481de9c ZY |
779 | { |
780 | IWL_DEBUG_HT("we are staying in the same table\n"); | |
781 | lq_data->stay_in_tbl = 1; | |
782 | if (is_legacy) { | |
783 | lq_data->table_count_limit = IWL_LEGACY_TABLE_COUNT; | |
784 | lq_data->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
403ab56b | 785 | lq_data->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; |
b481de9c ZY |
786 | } else { |
787 | lq_data->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; | |
788 | lq_data->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
789 | lq_data->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
790 | } | |
791 | lq_data->table_count = 0; | |
792 | lq_data->total_failed = 0; | |
793 | lq_data->total_success = 0; | |
794 | } | |
795 | ||
bb8c093b CH |
796 | static void rs_get_expected_tpt_table(struct iwl4965_rate_scale_priv *lq_data, |
797 | struct iwl4965_scale_tbl_info *tbl) | |
b481de9c ZY |
798 | { |
799 | if (is_legacy(tbl->lq_type)) { | |
800 | if (!is_a_band(tbl->lq_type)) | |
801 | tbl->expected_tpt = expected_tpt_G; | |
802 | else | |
803 | tbl->expected_tpt = expected_tpt_A; | |
804 | } else if (is_siso(tbl->lq_type)) { | |
805 | if (tbl->is_fat && !lq_data->is_dup) | |
806 | if (tbl->is_SGI) | |
807 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
808 | else | |
809 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
810 | else if (tbl->is_SGI) | |
811 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
812 | else | |
813 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
814 | ||
815 | } else if (is_mimo(tbl->lq_type)) { | |
816 | if (tbl->is_fat && !lq_data->is_dup) | |
817 | if (tbl->is_SGI) | |
818 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
819 | else | |
820 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
821 | else if (tbl->is_SGI) | |
822 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
823 | else | |
824 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
825 | } else | |
826 | tbl->expected_tpt = expected_tpt_G; | |
827 | } | |
828 | ||
c8b0e6e1 | 829 | #ifdef CONFIG_IWL4965_HT |
bb8c093b CH |
830 | static s32 rs_get_best_rate(struct iwl4965_priv *priv, |
831 | struct iwl4965_rate_scale_priv *lq_data, | |
832 | struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
833 | u16 rate_mask, s8 index, s8 rate) |
834 | { | |
bb8c093b | 835 | struct iwl4965_scale_tbl_info *active_tbl = |
b481de9c ZY |
836 | &(lq_data->lq_info[lq_data->active_tbl]); |
837 | s32 new_rate, high, low, start_hi; | |
838 | s32 active_sr = active_tbl->win[index].success_ratio; | |
839 | s32 *tpt_tbl = tbl->expected_tpt; | |
840 | s32 active_tpt = active_tbl->expected_tpt[index]; | |
841 | u16 high_low; | |
842 | ||
843 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
844 | ||
845 | for (; ;) { | |
846 | high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); | |
847 | ||
848 | low = high_low & 0xff; | |
849 | high = (high_low >> 8) & 0xff; | |
850 | ||
851 | if ((((100 * tpt_tbl[rate]) > lq_data->last_tpt) && | |
852 | ((active_sr > IWL_RATE_DECREASE_TH) && | |
853 | (active_sr <= IWL_RATE_HIGH_TH) && | |
854 | (tpt_tbl[rate] <= active_tpt))) || | |
855 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
856 | (tpt_tbl[rate] > active_tpt))) { | |
857 | ||
858 | if (start_hi != IWL_RATE_INVALID) { | |
859 | new_rate = start_hi; | |
860 | break; | |
861 | } | |
862 | new_rate = rate; | |
863 | if (low != IWL_RATE_INVALID) | |
864 | rate = low; | |
865 | else | |
866 | break; | |
867 | } else { | |
868 | if (new_rate != IWL_RATE_INVALID) | |
869 | break; | |
870 | else if (high != IWL_RATE_INVALID) { | |
871 | start_hi = high; | |
872 | rate = high; | |
873 | } else { | |
874 | new_rate = rate; | |
875 | break; | |
876 | } | |
877 | } | |
878 | } | |
879 | ||
880 | return new_rate; | |
881 | } | |
c8b0e6e1 | 882 | #endif /* CONFIG_IWL4965_HT */ |
b481de9c ZY |
883 | |
884 | static inline u8 rs_is_both_ant_supp(u8 valid_antenna) | |
885 | { | |
886 | return (rs_is_ant_connected(valid_antenna, ANT_BOTH)); | |
887 | } | |
888 | ||
bb8c093b CH |
889 | static int rs_switch_to_mimo(struct iwl4965_priv *priv, |
890 | struct iwl4965_rate_scale_priv *lq_data, | |
891 | struct iwl4965_scale_tbl_info *tbl, int index) | |
b481de9c | 892 | { |
c8b0e6e1 | 893 | #ifdef CONFIG_IWL4965_HT |
b481de9c ZY |
894 | u16 rate_mask; |
895 | s32 rate; | |
896 | s8 is_green = lq_data->is_green; | |
897 | ||
898 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
899 | return -1; | |
900 | ||
901 | IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); | |
902 | tbl->lq_type = LQ_MIMO; | |
903 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
904 | &rate_mask); | |
905 | ||
906 | if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) | |
907 | return -1; | |
908 | ||
909 | if (!rs_is_both_ant_supp(lq_data->antenna)) | |
910 | return -1; | |
911 | ||
b481de9c ZY |
912 | tbl->is_dup = lq_data->is_dup; |
913 | tbl->action = 0; | |
914 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
915 | tbl->is_fat = 1; | |
916 | else | |
917 | tbl->is_fat = 0; | |
918 | ||
919 | if (tbl->is_fat) { | |
920 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
921 | tbl->is_SGI = 1; | |
922 | else | |
923 | tbl->is_SGI = 0; | |
924 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
925 | tbl->is_SGI = 1; | |
926 | else | |
927 | tbl->is_SGI = 0; | |
928 | ||
929 | rs_get_expected_tpt_table(lq_data, tbl); | |
930 | ||
931 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
932 | ||
933 | IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate, rate_mask); | |
934 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) | |
935 | return -1; | |
936 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
937 | ||
938 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
939 | tbl->current_rate.rate_n_flags, is_green); | |
dc2453ae | 940 | return 0; |
403ab56b MA |
941 | #else |
942 | return -1; | |
943 | #endif /*CONFIG_IWL4965_HT */ | |
b481de9c ZY |
944 | } |
945 | ||
bb8c093b CH |
946 | static int rs_switch_to_siso(struct iwl4965_priv *priv, |
947 | struct iwl4965_rate_scale_priv *lq_data, | |
948 | struct iwl4965_scale_tbl_info *tbl, int index) | |
b481de9c | 949 | { |
c8b0e6e1 | 950 | #ifdef CONFIG_IWL4965_HT |
b481de9c ZY |
951 | u16 rate_mask; |
952 | u8 is_green = lq_data->is_green; | |
953 | s32 rate; | |
954 | ||
955 | IWL_DEBUG_HT("LQ: try to switch to SISO\n"); | |
956 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) | |
957 | return -1; | |
958 | ||
b481de9c ZY |
959 | tbl->is_dup = lq_data->is_dup; |
960 | tbl->lq_type = LQ_SISO; | |
961 | tbl->action = 0; | |
962 | rs_get_supported_rates(lq_data, NULL, tbl->lq_type, | |
963 | &rate_mask); | |
964 | ||
965 | if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) | |
966 | tbl->is_fat = 1; | |
967 | else | |
968 | tbl->is_fat = 0; | |
969 | ||
970 | if (tbl->is_fat) { | |
971 | if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
972 | tbl->is_SGI = 1; | |
973 | else | |
974 | tbl->is_SGI = 0; | |
975 | } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
976 | tbl->is_SGI = 1; | |
977 | else | |
978 | tbl->is_SGI = 0; | |
979 | ||
980 | if (is_green) | |
981 | tbl->is_SGI = 0; | |
982 | ||
983 | rs_get_expected_tpt_table(lq_data, tbl); | |
984 | rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); | |
985 | ||
986 | IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask); | |
987 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
988 | IWL_DEBUG_HT("can not switch with index %d rate mask %x\n", | |
989 | rate, rate_mask); | |
990 | return -1; | |
991 | } | |
992 | rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); | |
993 | IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", | |
994 | tbl->current_rate.rate_n_flags, is_green); | |
403ab56b MA |
995 | return 0; |
996 | #else | |
997 | return -1; | |
b481de9c | 998 | |
c8b0e6e1 | 999 | #endif /*CONFIG_IWL4965_HT */ |
b481de9c ZY |
1000 | } |
1001 | ||
bb8c093b CH |
1002 | static int rs_move_legacy_other(struct iwl4965_priv *priv, |
1003 | struct iwl4965_rate_scale_priv *lq_data, | |
b481de9c ZY |
1004 | int index) |
1005 | { | |
dc2453ae | 1006 | int ret = 0; |
bb8c093b | 1007 | struct iwl4965_scale_tbl_info *tbl = |
b481de9c | 1008 | &(lq_data->lq_info[lq_data->active_tbl]); |
bb8c093b | 1009 | struct iwl4965_scale_tbl_info *search_tbl = |
b481de9c | 1010 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
bb8c093b CH |
1011 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1012 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1013 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c ZY |
1014 | u8 start_action = tbl->action; |
1015 | ||
1016 | for (; ;) { | |
1017 | switch (tbl->action) { | |
1018 | case IWL_LEGACY_SWITCH_ANTENNA: | |
1019 | IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); | |
1020 | ||
1021 | search_tbl->lq_type = LQ_NONE; | |
1022 | lq_data->action_counter++; | |
1023 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1024 | break; | |
1025 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1026 | tbl->antenna_type)) | |
1027 | break; | |
1028 | ||
1029 | memcpy(search_tbl, tbl, sz); | |
1030 | ||
1031 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1032 | search_tbl); | |
1033 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1034 | lq_data->search_better_tbl = 1; | |
1035 | goto out; | |
1036 | ||
1037 | case IWL_LEGACY_SWITCH_SISO: | |
1038 | IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); | |
1039 | memcpy(search_tbl, tbl, sz); | |
1040 | search_tbl->lq_type = LQ_SISO; | |
1041 | search_tbl->is_SGI = 0; | |
1042 | search_tbl->is_fat = 0; | |
dc2453ae | 1043 | ret = rs_switch_to_siso(priv, lq_data, search_tbl, |
b481de9c | 1044 | index); |
dc2453ae | 1045 | if (!ret) { |
b481de9c ZY |
1046 | lq_data->search_better_tbl = 1; |
1047 | lq_data->action_counter = 0; | |
b481de9c | 1048 | goto out; |
dc2453ae | 1049 | } |
b481de9c ZY |
1050 | |
1051 | break; | |
1052 | case IWL_LEGACY_SWITCH_MIMO: | |
1053 | IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); | |
1054 | memcpy(search_tbl, tbl, sz); | |
1055 | search_tbl->lq_type = LQ_MIMO; | |
1056 | search_tbl->is_SGI = 0; | |
1057 | search_tbl->is_fat = 0; | |
1058 | search_tbl->antenna_type = ANT_BOTH; | |
dc2453ae | 1059 | ret = rs_switch_to_mimo(priv, lq_data, search_tbl, |
b481de9c | 1060 | index); |
dc2453ae | 1061 | if (!ret) { |
b481de9c ZY |
1062 | lq_data->search_better_tbl = 1; |
1063 | lq_data->action_counter = 0; | |
b481de9c | 1064 | goto out; |
dc2453ae | 1065 | } |
b481de9c ZY |
1066 | break; |
1067 | } | |
1068 | tbl->action++; | |
1069 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1070 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1071 | ||
1072 | if (tbl->action == start_action) | |
1073 | break; | |
1074 | ||
1075 | } | |
1076 | return 0; | |
1077 | ||
1078 | out: | |
1079 | tbl->action++; | |
1080 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO) | |
1081 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; | |
1082 | return 0; | |
1083 | ||
1084 | } | |
1085 | ||
bb8c093b CH |
1086 | static int rs_move_siso_to_other(struct iwl4965_priv *priv, |
1087 | struct iwl4965_rate_scale_priv *lq_data, | |
b481de9c ZY |
1088 | int index) |
1089 | { | |
dc2453ae | 1090 | int ret; |
b481de9c | 1091 | u8 is_green = lq_data->is_green; |
bb8c093b | 1092 | struct iwl4965_scale_tbl_info *tbl = |
b481de9c | 1093 | &(lq_data->lq_info[lq_data->active_tbl]); |
bb8c093b | 1094 | struct iwl4965_scale_tbl_info *search_tbl = |
b481de9c | 1095 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
bb8c093b CH |
1096 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1097 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1098 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c ZY |
1099 | u8 start_action = tbl->action; |
1100 | ||
1101 | for (;;) { | |
1102 | lq_data->action_counter++; | |
1103 | switch (tbl->action) { | |
1104 | case IWL_SISO_SWITCH_ANTENNA: | |
1105 | IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n"); | |
1106 | search_tbl->lq_type = LQ_NONE; | |
1107 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1108 | break; | |
1109 | if (!rs_is_other_ant_connected(lq_data->antenna, | |
1110 | tbl->antenna_type)) | |
1111 | break; | |
1112 | ||
1113 | memcpy(search_tbl, tbl, sz); | |
1114 | search_tbl->action = IWL_SISO_SWITCH_MIMO; | |
1115 | rs_toggle_antenna(&(search_tbl->current_rate), | |
1116 | search_tbl); | |
1117 | lq_data->search_better_tbl = 1; | |
1118 | ||
1119 | goto out; | |
1120 | ||
1121 | case IWL_SISO_SWITCH_MIMO: | |
1122 | IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n"); | |
1123 | memcpy(search_tbl, tbl, sz); | |
1124 | search_tbl->lq_type = LQ_MIMO; | |
1125 | search_tbl->is_SGI = 0; | |
1126 | search_tbl->is_fat = 0; | |
1127 | search_tbl->antenna_type = ANT_BOTH; | |
dc2453ae | 1128 | ret = rs_switch_to_mimo(priv, lq_data, search_tbl, |
b481de9c | 1129 | index); |
dc2453ae | 1130 | if (!ret) { |
b481de9c | 1131 | lq_data->search_better_tbl = 1; |
b481de9c | 1132 | goto out; |
dc2453ae | 1133 | } |
b481de9c ZY |
1134 | break; |
1135 | case IWL_SISO_SWITCH_GI: | |
1136 | IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); | |
1137 | memcpy(search_tbl, tbl, sz); | |
1138 | search_tbl->action = 0; | |
1139 | if (search_tbl->is_SGI) | |
1140 | search_tbl->is_SGI = 0; | |
1141 | else if (!is_green) | |
1142 | search_tbl->is_SGI = 1; | |
1143 | else | |
1144 | break; | |
1145 | lq_data->search_better_tbl = 1; | |
1146 | if ((tbl->lq_type == LQ_SISO) && | |
1147 | (tbl->is_SGI)) { | |
1148 | s32 tpt = lq_data->last_tpt / 100; | |
1149 | if (((!tbl->is_fat) && | |
1150 | (tpt >= expected_tpt_siso20MHz[index])) || | |
1151 | ((tbl->is_fat) && | |
1152 | (tpt >= expected_tpt_siso40MHz[index]))) | |
1153 | lq_data->search_better_tbl = 0; | |
1154 | } | |
1155 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1156 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1157 | search_tbl, index, is_green); | |
1158 | goto out; | |
1159 | } | |
1160 | tbl->action++; | |
1161 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1162 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1163 | ||
1164 | if (tbl->action == start_action) | |
1165 | break; | |
1166 | } | |
1167 | return 0; | |
1168 | ||
1169 | out: | |
1170 | tbl->action++; | |
1171 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1172 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1173 | return 0; | |
1174 | } | |
1175 | ||
bb8c093b CH |
1176 | static int rs_move_mimo_to_other(struct iwl4965_priv *priv, |
1177 | struct iwl4965_rate_scale_priv *lq_data, | |
b481de9c ZY |
1178 | int index) |
1179 | { | |
dc2453ae | 1180 | int ret; |
b481de9c | 1181 | s8 is_green = lq_data->is_green; |
bb8c093b | 1182 | struct iwl4965_scale_tbl_info *tbl = |
b481de9c | 1183 | &(lq_data->lq_info[lq_data->active_tbl]); |
bb8c093b | 1184 | struct iwl4965_scale_tbl_info *search_tbl = |
b481de9c | 1185 | &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
bb8c093b CH |
1186 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - |
1187 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c ZY |
1188 | u8 start_action = tbl->action; |
1189 | ||
1190 | for (;;) { | |
1191 | lq_data->action_counter++; | |
1192 | switch (tbl->action) { | |
1193 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1194 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
1195 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n"); | |
1196 | memcpy(search_tbl, tbl, sz); | |
1197 | search_tbl->lq_type = LQ_SISO; | |
1198 | search_tbl->is_SGI = 0; | |
1199 | search_tbl->is_fat = 0; | |
1200 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) | |
1201 | search_tbl->antenna_type = ANT_MAIN; | |
1202 | else | |
1203 | search_tbl->antenna_type = ANT_AUX; | |
1204 | ||
dc2453ae | 1205 | ret = rs_switch_to_siso(priv, lq_data, search_tbl, |
b481de9c | 1206 | index); |
dc2453ae | 1207 | if (!ret) { |
b481de9c ZY |
1208 | lq_data->search_better_tbl = 1; |
1209 | goto out; | |
1210 | } | |
1211 | break; | |
1212 | ||
1213 | case IWL_MIMO_SWITCH_GI: | |
1214 | IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); | |
1215 | memcpy(search_tbl, tbl, sz); | |
1216 | search_tbl->lq_type = LQ_MIMO; | |
1217 | search_tbl->antenna_type = ANT_BOTH; | |
1218 | search_tbl->action = 0; | |
1219 | if (search_tbl->is_SGI) | |
1220 | search_tbl->is_SGI = 0; | |
1221 | else | |
1222 | search_tbl->is_SGI = 1; | |
1223 | lq_data->search_better_tbl = 1; | |
1224 | if ((tbl->lq_type == LQ_MIMO) && | |
1225 | (tbl->is_SGI)) { | |
1226 | s32 tpt = lq_data->last_tpt / 100; | |
1227 | if (((!tbl->is_fat) && | |
1228 | (tpt >= expected_tpt_mimo20MHz[index])) || | |
1229 | ((tbl->is_fat) && | |
1230 | (tpt >= expected_tpt_mimo40MHz[index]))) | |
1231 | lq_data->search_better_tbl = 0; | |
1232 | } | |
1233 | rs_get_expected_tpt_table(lq_data, search_tbl); | |
1234 | rs_mcs_from_tbl(&search_tbl->current_rate, | |
1235 | search_tbl, index, is_green); | |
1236 | goto out; | |
1237 | ||
1238 | } | |
1239 | tbl->action++; | |
1240 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1241 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1242 | ||
1243 | if (tbl->action == start_action) | |
1244 | break; | |
1245 | } | |
1246 | ||
1247 | return 0; | |
1248 | out: | |
1249 | tbl->action++; | |
1250 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1251 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1252 | return 0; | |
1253 | ||
1254 | } | |
1255 | ||
bb8c093b | 1256 | static void rs_stay_in_table(struct iwl4965_rate_scale_priv *lq_data) |
b481de9c | 1257 | { |
bb8c093b | 1258 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c ZY |
1259 | int i; |
1260 | int active_tbl; | |
1261 | int flush_interval_passed = 0; | |
1262 | ||
1263 | active_tbl = lq_data->active_tbl; | |
1264 | ||
1265 | tbl = &(lq_data->lq_info[active_tbl]); | |
1266 | ||
1267 | if (lq_data->stay_in_tbl) { | |
1268 | ||
1269 | if (lq_data->flush_timer) | |
1270 | flush_interval_passed = | |
1271 | time_after(jiffies, | |
1272 | (unsigned long)(lq_data->flush_timer + | |
1273 | IWL_RATE_SCALE_FLUSH_INTVL)); | |
1274 | ||
1275 | flush_interval_passed = 0; | |
1276 | if ((lq_data->total_failed > lq_data->max_failure_limit) || | |
1277 | (lq_data->total_success > lq_data->max_success_limit) || | |
1278 | ((!lq_data->search_better_tbl) && (lq_data->flush_timer) | |
1279 | && (flush_interval_passed))) { | |
1280 | IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:", | |
1281 | lq_data->total_failed, | |
1282 | lq_data->total_success, | |
1283 | flush_interval_passed); | |
1284 | lq_data->stay_in_tbl = 0; | |
1285 | lq_data->total_failed = 0; | |
1286 | lq_data->total_success = 0; | |
1287 | lq_data->flush_timer = 0; | |
403ab56b | 1288 | } else { |
b481de9c ZY |
1289 | lq_data->table_count++; |
1290 | if (lq_data->table_count >= | |
1291 | lq_data->table_count_limit) { | |
1292 | lq_data->table_count = 0; | |
1293 | ||
1294 | IWL_DEBUG_HT("LQ: stay in table clear win\n"); | |
1295 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1296 | rs_rate_scale_clear_window( | |
1297 | &(tbl->win[i])); | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | if (!lq_data->stay_in_tbl) { | |
1302 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1303 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1304 | } | |
1305 | } | |
1306 | } | |
1307 | ||
bb8c093b | 1308 | static void rs_rate_scale_perform(struct iwl4965_priv *priv, |
b481de9c ZY |
1309 | struct net_device *dev, |
1310 | struct ieee80211_hdr *hdr, | |
1311 | struct sta_info *sta) | |
1312 | { | |
1313 | int low = IWL_RATE_INVALID; | |
1314 | int high = IWL_RATE_INVALID; | |
1315 | int index; | |
1316 | int i; | |
bb8c093b | 1317 | struct iwl4965_rate_scale_data *window = NULL; |
b481de9c ZY |
1318 | int current_tpt = IWL_INVALID_VALUE; |
1319 | int low_tpt = IWL_INVALID_VALUE; | |
1320 | int high_tpt = IWL_INVALID_VALUE; | |
1321 | u32 fail_count; | |
1322 | s8 scale_action = 0; | |
1323 | u16 fc, rate_mask; | |
1324 | u8 update_lq = 0; | |
bb8c093b CH |
1325 | struct iwl4965_rate_scale_priv *lq_data; |
1326 | struct iwl4965_scale_tbl_info *tbl, *tbl1; | |
b481de9c | 1327 | u16 rate_scale_index_msk = 0; |
bb8c093b | 1328 | struct iwl4965_rate mcs_rate; |
b481de9c ZY |
1329 | u8 is_green = 0; |
1330 | u8 active_tbl = 0; | |
1331 | u8 done_search = 0; | |
1332 | u16 high_low; | |
1333 | ||
1334 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1335 | ||
1336 | fc = le16_to_cpu(hdr->frame_control); | |
1337 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1338 | /* Send management frames and broadcast/multicast data using | |
1339 | * lowest rate. */ | |
1340 | /* TODO: this could probably be improved.. */ | |
1341 | return; | |
1342 | } | |
1343 | ||
1344 | if (!sta || !sta->rate_ctrl_priv) | |
1345 | return; | |
1346 | ||
1347 | if (!priv->lq_mngr.lq_ready) { | |
1348 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1349 | return; | |
1350 | } | |
bb8c093b | 1351 | lq_data = (struct iwl4965_rate_scale_priv *)sta->rate_ctrl_priv; |
b481de9c ZY |
1352 | |
1353 | if (!lq_data->search_better_tbl) | |
1354 | active_tbl = lq_data->active_tbl; | |
1355 | else | |
1356 | active_tbl = 1 - lq_data->active_tbl; | |
1357 | ||
1358 | tbl = &(lq_data->lq_info[active_tbl]); | |
1359 | is_green = lq_data->is_green; | |
1360 | ||
1361 | index = sta->last_txrate; | |
1362 | ||
1363 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1364 | tbl->lq_type); | |
1365 | ||
1366 | rs_get_supported_rates(lq_data, hdr, tbl->lq_type, | |
1367 | &rate_mask); | |
1368 | ||
1369 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1370 | ||
1371 | /* mask with station rate restriction */ | |
1372 | if (is_legacy(tbl->lq_type)) { | |
1373 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1374 | rate_scale_index_msk = (u16) (rate_mask & | |
02dede04 | 1375 | (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1376 | else |
1377 | rate_scale_index_msk = (u16) (rate_mask & | |
02dede04 | 1378 | lq_data->supp_rates); |
b481de9c ZY |
1379 | |
1380 | } else | |
1381 | rate_scale_index_msk = rate_mask; | |
1382 | ||
1383 | if (!rate_scale_index_msk) | |
1384 | rate_scale_index_msk = rate_mask; | |
1385 | ||
1386 | if (index < 0 || !((1 << index) & rate_scale_index_msk)) { | |
1387 | index = IWL_INVALID_VALUE; | |
1388 | update_lq = 1; | |
1389 | ||
01ebd063 | 1390 | /* get the lowest available rate */ |
b481de9c ZY |
1391 | for (i = 0; i <= IWL_RATE_COUNT; i++) { |
1392 | if ((1 << i) & rate_scale_index_msk) | |
1393 | index = i; | |
1394 | } | |
1395 | ||
1396 | if (index == IWL_INVALID_VALUE) { | |
1397 | IWL_WARNING("Can not find a suitable rate\n"); | |
1398 | return; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | if (!tbl->expected_tpt) | |
1403 | rs_get_expected_tpt_table(lq_data, tbl); | |
1404 | ||
1405 | window = &(tbl->win[index]); | |
1406 | ||
1407 | fail_count = window->counter - window->success_counter; | |
1408 | if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && | |
1409 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) | |
1410 | || (tbl->expected_tpt == NULL)) { | |
1411 | IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " | |
1412 | "for index %d\n", | |
1413 | window->success_counter, window->counter, index); | |
1414 | window->average_tpt = IWL_INVALID_VALUE; | |
1415 | rs_stay_in_table(lq_data); | |
1416 | if (update_lq) { | |
1417 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
02dede04 | 1418 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
b481de9c ZY |
1419 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1420 | } | |
1421 | goto out; | |
1422 | ||
1423 | } else | |
1424 | window->average_tpt = ((window->success_ratio * | |
1425 | tbl->expected_tpt[index] + 64) / 128); | |
1426 | ||
1427 | if (lq_data->search_better_tbl) { | |
1428 | int success_limit = IWL_RATE_SCALE_SWITCH; | |
1429 | ||
1430 | if ((window->success_ratio > success_limit) || | |
1431 | (window->average_tpt > lq_data->last_tpt)) { | |
1432 | if (!is_legacy(tbl->lq_type)) { | |
1433 | IWL_DEBUG_HT("LQ: we are switching to HT" | |
1434 | " rate suc %d current tpt %d" | |
1435 | " old tpt %d\n", | |
1436 | window->success_ratio, | |
1437 | window->average_tpt, | |
1438 | lq_data->last_tpt); | |
1439 | lq_data->enable_counter = 1; | |
1440 | } | |
1441 | lq_data->active_tbl = active_tbl; | |
1442 | current_tpt = window->average_tpt; | |
1443 | } else { | |
1444 | tbl->lq_type = LQ_NONE; | |
1445 | active_tbl = lq_data->active_tbl; | |
1446 | tbl = &(lq_data->lq_info[active_tbl]); | |
1447 | ||
bb8c093b | 1448 | index = iwl4965_rate_index_from_plcp( |
b481de9c ZY |
1449 | tbl->current_rate.rate_n_flags); |
1450 | ||
1451 | update_lq = 1; | |
1452 | current_tpt = lq_data->last_tpt; | |
1453 | IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n"); | |
1454 | } | |
1455 | lq_data->search_better_tbl = 0; | |
1456 | done_search = 1; | |
1457 | goto lq_update; | |
1458 | } | |
1459 | ||
1460 | high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, | |
1461 | tbl->lq_type); | |
1462 | low = high_low & 0xff; | |
1463 | high = (high_low >> 8) & 0xff; | |
1464 | ||
1465 | current_tpt = window->average_tpt; | |
1466 | ||
1467 | if (low != IWL_RATE_INVALID) | |
1468 | low_tpt = tbl->win[low].average_tpt; | |
1469 | ||
1470 | if (high != IWL_RATE_INVALID) | |
1471 | high_tpt = tbl->win[high].average_tpt; | |
1472 | ||
1473 | ||
1474 | scale_action = 1; | |
1475 | ||
1476 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || | |
1477 | (current_tpt == 0)) { | |
1478 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); | |
1479 | scale_action = -1; | |
1480 | } else if ((low_tpt == IWL_INVALID_VALUE) && | |
1481 | (high_tpt == IWL_INVALID_VALUE)) | |
1482 | scale_action = 1; | |
1483 | else if ((low_tpt != IWL_INVALID_VALUE) && | |
1484 | (high_tpt != IWL_INVALID_VALUE) && | |
1485 | (low_tpt < current_tpt) && | |
1486 | (high_tpt < current_tpt)) | |
1487 | scale_action = 0; | |
1488 | else { | |
1489 | if (high_tpt != IWL_INVALID_VALUE) { | |
1490 | if (high_tpt > current_tpt) | |
1491 | scale_action = 1; | |
1492 | else { | |
1493 | IWL_DEBUG_RATE | |
1494 | ("decrease rate because of high tpt\n"); | |
1495 | scale_action = -1; | |
1496 | } | |
1497 | } else if (low_tpt != IWL_INVALID_VALUE) { | |
1498 | if (low_tpt > current_tpt) { | |
1499 | IWL_DEBUG_RATE | |
1500 | ("decrease rate because of low tpt\n"); | |
1501 | scale_action = -1; | |
1502 | } else | |
1503 | scale_action = 1; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | if (scale_action == -1) { | |
1508 | if ((low != IWL_RATE_INVALID) && | |
1509 | ((window->success_ratio > IWL_RATE_HIGH_TH) || | |
1510 | (current_tpt > (100 * tbl->expected_tpt[low])))) | |
1511 | scale_action = 0; | |
1512 | } else if ((scale_action == 1) && | |
1513 | (window->success_ratio < IWL_RATE_INCREASE_TH)) | |
1514 | scale_action = 0; | |
1515 | ||
1516 | switch (scale_action) { | |
1517 | case -1: | |
1518 | if (low != IWL_RATE_INVALID) { | |
1519 | update_lq = 1; | |
1520 | index = low; | |
1521 | } | |
1522 | break; | |
1523 | case 1: | |
1524 | if (high != IWL_RATE_INVALID) { | |
1525 | update_lq = 1; | |
1526 | index = high; | |
1527 | } | |
1528 | ||
1529 | break; | |
1530 | case 0: | |
1531 | default: | |
1532 | break; | |
1533 | } | |
1534 | ||
1535 | IWL_DEBUG_HT("choose rate scale index %d action %d low %d " | |
1536 | "high %d type %d\n", | |
1537 | index, scale_action, low, high, tbl->lq_type); | |
1538 | ||
1539 | lq_update: | |
1540 | if (update_lq) { | |
1541 | rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); | |
02dede04 | 1542 | rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
b481de9c ZY |
1543 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1544 | } | |
1545 | rs_stay_in_table(lq_data); | |
1546 | ||
1547 | if (!update_lq && !done_search && !lq_data->stay_in_tbl) { | |
1548 | lq_data->last_tpt = current_tpt; | |
1549 | ||
1550 | if (is_legacy(tbl->lq_type)) | |
1551 | rs_move_legacy_other(priv, lq_data, index); | |
1552 | else if (is_siso(tbl->lq_type)) | |
1553 | rs_move_siso_to_other(priv, lq_data, index); | |
1554 | else | |
1555 | rs_move_mimo_to_other(priv, lq_data, index); | |
1556 | ||
1557 | if (lq_data->search_better_tbl) { | |
1558 | tbl = &(lq_data->lq_info[(1 - lq_data->active_tbl)]); | |
1559 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1560 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1561 | ||
bb8c093b | 1562 | index = iwl4965_rate_index_from_plcp( |
b481de9c ZY |
1563 | tbl->current_rate.rate_n_flags); |
1564 | ||
1565 | IWL_DEBUG_HT("Switch current mcs: %X index: %d\n", | |
1566 | tbl->current_rate.rate_n_flags, index); | |
1567 | rs_fill_link_cmd(lq_data, &tbl->current_rate, | |
02dede04 | 1568 | &lq_data->lq); |
b481de9c ZY |
1569 | rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
1570 | } | |
1571 | tbl1 = &(lq_data->lq_info[lq_data->active_tbl]); | |
1572 | ||
1573 | if (is_legacy(tbl1->lq_type) && | |
c8b0e6e1 | 1574 | #ifdef CONFIG_IWL4965_HT |
b481de9c ZY |
1575 | !priv->current_assoc_ht.is_ht && |
1576 | #endif | |
1577 | (lq_data->action_counter >= 1)) { | |
1578 | lq_data->action_counter = 0; | |
1579 | IWL_DEBUG_HT("LQ: STAY in legacy table\n"); | |
1580 | rs_set_stay_in_table(1, lq_data); | |
1581 | } | |
1582 | ||
1583 | if (lq_data->enable_counter && | |
1584 | (lq_data->action_counter >= IWL_ACTION_LIMIT)) { | |
c8b0e6e1 | 1585 | #ifdef CONFIG_IWL4965_HT_AGG |
b481de9c ZY |
1586 | if ((lq_data->last_tpt > TID_AGG_TPT_THREHOLD) && |
1587 | (priv->lq_mngr.agg_ctrl.auto_agg)) { | |
1588 | priv->lq_mngr.agg_ctrl.tid_retry = | |
1589 | TID_ALL_SPECIFIED; | |
1590 | schedule_work(&priv->agg_work); | |
1591 | } | |
c8b0e6e1 | 1592 | #endif /*CONFIG_IWL4965_HT_AGG */ |
b481de9c ZY |
1593 | lq_data->action_counter = 0; |
1594 | rs_set_stay_in_table(0, lq_data); | |
1595 | } | |
1596 | } else { | |
1597 | if ((!update_lq) && (!done_search) && (!lq_data->flush_timer)) | |
1598 | lq_data->flush_timer = jiffies; | |
1599 | } | |
1600 | ||
1601 | out: | |
1602 | rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green); | |
1603 | i = index; | |
1604 | sta->last_txrate = i; | |
1605 | ||
1606 | /* sta->txrate is an index to A mode rates which start | |
1607 | * at IWL_FIRST_OFDM_RATE | |
1608 | */ | |
1609 | if (lq_data->phymode == (u8) MODE_IEEE80211A) | |
1610 | sta->txrate = i - IWL_FIRST_OFDM_RATE; | |
1611 | else | |
1612 | sta->txrate = i; | |
1613 | ||
1614 | return; | |
1615 | } | |
1616 | ||
1617 | ||
bb8c093b | 1618 | static void rs_initialize_lq(struct iwl4965_priv *priv, |
b481de9c ZY |
1619 | struct sta_info *sta) |
1620 | { | |
1621 | int i; | |
bb8c093b CH |
1622 | struct iwl4965_rate_scale_priv *lq; |
1623 | struct iwl4965_scale_tbl_info *tbl; | |
b481de9c ZY |
1624 | u8 active_tbl = 0; |
1625 | int rate_idx; | |
1626 | u8 use_green = rs_use_green(priv); | |
bb8c093b | 1627 | struct iwl4965_rate mcs_rate; |
b481de9c ZY |
1628 | |
1629 | if (!sta || !sta->rate_ctrl_priv) | |
1630 | goto out; | |
1631 | ||
bb8c093b | 1632 | lq = (struct iwl4965_rate_scale_priv *)sta->rate_ctrl_priv; |
b481de9c ZY |
1633 | i = sta->last_txrate; |
1634 | ||
1635 | if ((lq->lq.sta_id == 0xff) && | |
1636 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) | |
1637 | goto out; | |
1638 | ||
1639 | if (!lq->search_better_tbl) | |
1640 | active_tbl = lq->active_tbl; | |
1641 | else | |
1642 | active_tbl = 1 - lq->active_tbl; | |
1643 | ||
1644 | tbl = &(lq->lq_info[active_tbl]); | |
1645 | ||
1646 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
1647 | i = 0; | |
1648 | ||
bb8c093b | 1649 | mcs_rate.rate_n_flags = iwl4965_rates[i].plcp ; |
b481de9c ZY |
1650 | mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; |
1651 | mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; | |
1652 | ||
1653 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
1654 | mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK; | |
1655 | ||
1656 | tbl->antenna_type = ANT_AUX; | |
1657 | rs_get_tbl_info_from_mcs(&mcs_rate, priv->phymode, tbl, &rate_idx); | |
1658 | if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type)) | |
46640a8c | 1659 | rs_toggle_antenna(&mcs_rate, tbl); |
b481de9c ZY |
1660 | |
1661 | rs_mcs_from_tbl(&mcs_rate, tbl, rate_idx, use_green); | |
1662 | tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags; | |
1663 | rs_get_expected_tpt_table(lq, tbl); | |
02dede04 | 1664 | rs_fill_link_cmd(lq, &mcs_rate, &lq->lq); |
b481de9c ZY |
1665 | rs_send_lq_cmd(priv, &lq->lq, CMD_ASYNC); |
1666 | out: | |
1667 | return; | |
1668 | } | |
1669 | ||
1abbe498 MN |
1670 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
1671 | struct ieee80211_hw_mode *mode, struct sk_buff *skb, | |
1672 | struct rate_selection *sel) | |
b481de9c ZY |
1673 | { |
1674 | ||
1675 | int i; | |
1676 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1677 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1678 | struct sta_info *sta; | |
bb8c093b CH |
1679 | struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; |
1680 | struct iwl4965_rate_scale_priv *lq; | |
b481de9c | 1681 | |
58826351 | 1682 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 1683 | |
b481de9c ZY |
1684 | sta = sta_info_get(local, hdr->addr1); |
1685 | ||
1686 | if (!sta || !sta->rate_ctrl_priv) { | |
1abbe498 | 1687 | sel->rate = rate_lowest(local, local->oper_hw_mode, sta); |
b481de9c ZY |
1688 | if (sta) |
1689 | sta_info_put(sta); | |
1abbe498 | 1690 | return; |
b481de9c ZY |
1691 | } |
1692 | ||
bb8c093b | 1693 | lq = (struct iwl4965_rate_scale_priv *)sta->rate_ctrl_priv; |
b481de9c ZY |
1694 | i = sta->last_txrate; |
1695 | ||
1696 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) { | |
bb8c093b | 1697 | u8 sta_id = iwl4965_hw_find_station(priv, hdr->addr1); |
0795af57 | 1698 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
1699 | |
1700 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1701 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1702 | print_mac(mac, hdr->addr1)); | |
bb8c093b | 1703 | sta_id = iwl4965_add_station_flags(priv, |
b481de9c ZY |
1704 | hdr->addr1, 0, CMD_ASYNC); |
1705 | } | |
1706 | if ((sta_id != IWL_INVALID_STATION)) { | |
1707 | lq->lq.sta_id = sta_id; | |
1708 | lq->lq.rs_table[0].rate_n_flags = 0; | |
1709 | lq->ibss_sta_added = 1; | |
1710 | rs_initialize_lq(priv, sta); | |
1711 | } | |
1712 | if (!lq->ibss_sta_added) | |
1713 | goto done; | |
1714 | } | |
1715 | ||
1716 | done: | |
1abbe498 MN |
1717 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
1718 | sel->rate = rate_lowest(local, local->oper_hw_mode, sta); | |
1719 | return; | |
1720 | } | |
b481de9c | 1721 | sta_info_put(sta); |
b481de9c | 1722 | |
1abbe498 | 1723 | sel->rate = &priv->ieee_rates[i]; |
b481de9c ZY |
1724 | } |
1725 | ||
1726 | static void *rs_alloc_sta(void *priv, gfp_t gfp) | |
1727 | { | |
bb8c093b | 1728 | struct iwl4965_rate_scale_priv *crl; |
b481de9c ZY |
1729 | int i, j; |
1730 | ||
1731 | IWL_DEBUG_RATE("create station rate scale window\n"); | |
1732 | ||
bb8c093b | 1733 | crl = kzalloc(sizeof(struct iwl4965_rate_scale_priv), gfp); |
b481de9c ZY |
1734 | |
1735 | if (crl == NULL) | |
1736 | return NULL; | |
b481de9c ZY |
1737 | crl->lq.sta_id = 0xff; |
1738 | ||
63fddb9f | 1739 | |
b481de9c ZY |
1740 | for (j = 0; j < LQ_SIZE; j++) |
1741 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1742 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1743 | ||
1744 | return crl; | |
1745 | } | |
1746 | ||
1747 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
1748 | struct ieee80211_local *local, | |
1749 | struct sta_info *sta) | |
1750 | { | |
1751 | int i, j; | |
1752 | struct ieee80211_hw_mode *mode = local->oper_hw_mode; | |
bb8c093b CH |
1753 | struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; |
1754 | struct iwl4965_rate_scale_priv *crl = priv_sta; | |
b481de9c | 1755 | |
b481de9c | 1756 | crl->flush_timer = 0; |
02dede04 | 1757 | crl->supp_rates = sta->supp_rates; |
b481de9c ZY |
1758 | sta->txrate = 3; |
1759 | for (j = 0; j < LQ_SIZE; j++) | |
1760 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1761 | rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); | |
1762 | ||
1763 | IWL_DEBUG_RATE("rate scale global init\n"); | |
1764 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
1765 | * the lowest or the highest rate.. Could consider using RSSI from | |
1766 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
1767 | * after assoc.. */ | |
1768 | ||
1769 | crl->ibss_sta_added = 0; | |
1770 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { | |
bb8c093b | 1771 | u8 sta_id = iwl4965_hw_find_station(priv, sta->addr); |
0795af57 JP |
1772 | DECLARE_MAC_BUF(mac); |
1773 | ||
b481de9c | 1774 | /* for IBSS the call are from tasklet */ |
0795af57 JP |
1775 | IWL_DEBUG_HT("LQ: ADD station %s\n", |
1776 | print_mac(mac, sta->addr)); | |
b481de9c ZY |
1777 | |
1778 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
1779 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
1780 | print_mac(mac, sta->addr)); | |
bb8c093b | 1781 | sta_id = iwl4965_add_station_flags(priv, |
b481de9c ZY |
1782 | sta->addr, 0, CMD_ASYNC); |
1783 | } | |
1784 | if ((sta_id != IWL_INVALID_STATION)) { | |
1785 | crl->lq.sta_id = sta_id; | |
1786 | crl->lq.rs_table[0].rate_n_flags = 0; | |
1787 | } | |
1788 | /* FIXME: this is w/a remove it later */ | |
1789 | priv->assoc_station_added = 1; | |
1790 | } | |
1791 | ||
1792 | for (i = 0; i < mode->num_rates; i++) { | |
1793 | if ((sta->supp_rates & BIT(i)) && | |
1794 | (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) | |
1795 | sta->txrate = i; | |
1796 | } | |
1797 | sta->last_txrate = sta->txrate; | |
1798 | /* For MODE_IEEE80211A mode cck rate are at end | |
1799 | * rate table | |
1800 | */ | |
1801 | if (local->hw.conf.phymode == MODE_IEEE80211A) | |
1802 | sta->last_txrate += IWL_FIRST_OFDM_RATE; | |
1803 | ||
1804 | crl->is_dup = priv->is_dup; | |
1805 | crl->valid_antenna = priv->valid_antenna; | |
1806 | crl->antenna = priv->antenna; | |
1807 | crl->is_green = rs_use_green(priv); | |
1808 | crl->active_rate = priv->active_rate; | |
1809 | crl->active_rate &= ~(0x1000); | |
1810 | crl->active_rate_basic = priv->active_rate_basic; | |
1811 | crl->phymode = priv->phymode; | |
c8b0e6e1 | 1812 | #ifdef CONFIG_IWL4965_HT |
b481de9c ZY |
1813 | crl->active_siso_rate = (priv->current_assoc_ht.supp_rates[0] << 1); |
1814 | crl->active_siso_rate |= (priv->current_assoc_ht.supp_rates[0] & 0x1); | |
1815 | crl->active_siso_rate &= ~((u16)0x2); | |
1816 | crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE; | |
1817 | ||
1818 | crl->active_mimo_rate = (priv->current_assoc_ht.supp_rates[1] << 1); | |
1819 | crl->active_mimo_rate |= (priv->current_assoc_ht.supp_rates[1] & 0x1); | |
1820 | crl->active_mimo_rate &= ~((u16)0x2); | |
1821 | crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE; | |
1822 | IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, | |
1823 | crl->active_mimo_rate); | |
c8b0e6e1 | 1824 | #endif /*CONFIG_IWL4965_HT*/ |
98d7e09a ZY |
1825 | #ifdef CONFIG_MAC80211_DEBUGFS |
1826 | crl->drv = priv; | |
1827 | #endif | |
b481de9c ZY |
1828 | |
1829 | if (priv->assoc_station_added) | |
1830 | priv->lq_mngr.lq_ready = 1; | |
1831 | ||
1832 | rs_initialize_lq(priv, sta); | |
1833 | } | |
1834 | ||
bb8c093b CH |
1835 | static void rs_fill_link_cmd(struct iwl4965_rate_scale_priv *lq_data, |
1836 | struct iwl4965_rate *tx_mcs, | |
1837 | struct iwl4965_link_quality_cmd *lq_cmd) | |
b481de9c ZY |
1838 | { |
1839 | int index = 0; | |
b481de9c | 1840 | int rate_idx; |
1b696de2 | 1841 | int repeat_rate = 0; |
b481de9c ZY |
1842 | u8 ant_toggle_count = 0; |
1843 | u8 use_ht_possible = 1; | |
bb8c093b CH |
1844 | struct iwl4965_rate new_rate; |
1845 | struct iwl4965_scale_tbl_info tbl_type = { 0 }; | |
b481de9c | 1846 | |
98d7e09a ZY |
1847 | rs_dbgfs_set_mcs(lq_data, tx_mcs, index); |
1848 | ||
b481de9c ZY |
1849 | rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode, |
1850 | &tbl_type, &rate_idx); | |
1851 | ||
1852 | if (is_legacy(tbl_type.lq_type)) { | |
1853 | ant_toggle_count = 1; | |
1b696de2 | 1854 | repeat_rate = IWL_NUMBER_TRY; |
b481de9c | 1855 | } else |
1b696de2 | 1856 | repeat_rate = IWL_HT_NUMBER_TRY; |
b481de9c ZY |
1857 | |
1858 | lq_cmd->general_params.mimo_delimiter = | |
1859 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
1860 | lq_cmd->rs_table[index].rate_n_flags = | |
1861 | cpu_to_le32(tx_mcs->rate_n_flags); | |
1862 | new_rate.rate_n_flags = tx_mcs->rate_n_flags; | |
1863 | ||
1864 | if (is_mimo(tbl_type.lq_type) || (tbl_type.antenna_type == ANT_MAIN)) | |
1865 | lq_cmd->general_params.single_stream_ant_msk = 1; | |
1866 | else | |
1867 | lq_cmd->general_params.single_stream_ant_msk = 2; | |
1868 | ||
1869 | index++; | |
1b696de2 | 1870 | repeat_rate--; |
b481de9c ZY |
1871 | |
1872 | while (index < LINK_QUAL_MAX_RETRY_NUM) { | |
1b696de2 | 1873 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c ZY |
1874 | if (is_legacy(tbl_type.lq_type)) { |
1875 | if (ant_toggle_count < | |
1876 | NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
1877 | ant_toggle_count++; | |
1878 | else { | |
1879 | rs_toggle_antenna(&new_rate, &tbl_type); | |
1880 | ant_toggle_count = 1; | |
1881 | } | |
1882 | } | |
98d7e09a ZY |
1883 | |
1884 | rs_dbgfs_set_mcs(lq_data, &new_rate, index); | |
b481de9c ZY |
1885 | lq_cmd->rs_table[index].rate_n_flags = |
1886 | cpu_to_le32(new_rate.rate_n_flags); | |
1b696de2 | 1887 | repeat_rate--; |
b481de9c ZY |
1888 | index++; |
1889 | } | |
1890 | ||
1891 | rs_get_tbl_info_from_mcs(&new_rate, lq_data->phymode, &tbl_type, | |
1892 | &rate_idx); | |
1893 | ||
1894 | if (is_mimo(tbl_type.lq_type)) | |
1895 | lq_cmd->general_params.mimo_delimiter = index; | |
1896 | ||
1897 | rs_get_lower_rate(lq_data, &tbl_type, rate_idx, | |
02dede04 | 1898 | use_ht_possible, &new_rate); |
b481de9c ZY |
1899 | |
1900 | if (is_legacy(tbl_type.lq_type)) { | |
1901 | if (ant_toggle_count < NUM_TRY_BEFORE_ANTENNA_TOGGLE) | |
1902 | ant_toggle_count++; | |
1903 | else { | |
1904 | rs_toggle_antenna(&new_rate, &tbl_type); | |
1905 | ant_toggle_count = 1; | |
1906 | } | |
1b696de2 | 1907 | repeat_rate = IWL_NUMBER_TRY; |
b481de9c | 1908 | } else |
1b696de2 | 1909 | repeat_rate = IWL_HT_NUMBER_TRY; |
b481de9c ZY |
1910 | |
1911 | use_ht_possible = 0; | |
1912 | ||
98d7e09a | 1913 | rs_dbgfs_set_mcs(lq_data, &new_rate, index); |
b481de9c ZY |
1914 | lq_cmd->rs_table[index].rate_n_flags = |
1915 | cpu_to_le32(new_rate.rate_n_flags); | |
b481de9c ZY |
1916 | |
1917 | index++; | |
1b696de2 | 1918 | repeat_rate--; |
b481de9c ZY |
1919 | } |
1920 | ||
b481de9c ZY |
1921 | lq_cmd->general_params.dual_stream_ant_msk = 3; |
1922 | lq_cmd->agg_params.agg_dis_start_th = 3; | |
1923 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
1924 | } |
1925 | ||
1926 | static void *rs_alloc(struct ieee80211_local *local) | |
1927 | { | |
1928 | return local->hw.priv; | |
1929 | } | |
1930 | /* rate scale requires free function to be implemented */ | |
1931 | static void rs_free(void *priv_rate) | |
1932 | { | |
1933 | return; | |
1934 | } | |
1935 | ||
1936 | static void rs_clear(void *priv_rate) | |
1937 | { | |
bb8c093b | 1938 | struct iwl4965_priv *priv = (struct iwl4965_priv *) priv_rate; |
b481de9c ZY |
1939 | |
1940 | IWL_DEBUG_RATE("enter\n"); | |
1941 | ||
1942 | priv->lq_mngr.lq_ready = 0; | |
c8b0e6e1 CH |
1943 | #ifdef CONFIG_IWL4965_HT |
1944 | #ifdef CONFIG_IWL4965_HT_AGG | |
b481de9c ZY |
1945 | if (priv->lq_mngr.agg_ctrl.granted_ba) |
1946 | iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED); | |
c8b0e6e1 CH |
1947 | #endif /*CONFIG_IWL4965_HT_AGG */ |
1948 | #endif /* CONFIG_IWL4965_HT */ | |
b481de9c ZY |
1949 | |
1950 | IWL_DEBUG_RATE("leave\n"); | |
1951 | } | |
1952 | ||
1953 | static void rs_free_sta(void *priv, void *priv_sta) | |
1954 | { | |
bb8c093b | 1955 | struct iwl4965_rate_scale_priv *rs_priv = priv_sta; |
b481de9c ZY |
1956 | |
1957 | IWL_DEBUG_RATE("enter\n"); | |
1958 | kfree(rs_priv); | |
1959 | IWL_DEBUG_RATE("leave\n"); | |
1960 | } | |
1961 | ||
1962 | ||
93dc646a | 1963 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
1964 | static int open_file_generic(struct inode *inode, struct file *file) |
1965 | { | |
1966 | file->private_data = inode->i_private; | |
1967 | return 0; | |
1968 | } | |
bb8c093b CH |
1969 | static void rs_dbgfs_set_mcs(struct iwl4965_rate_scale_priv *rs_priv, |
1970 | struct iwl4965_rate *mcs, int index) | |
98d7e09a | 1971 | { |
4457e1a4 RR |
1972 | u32 base_rate; |
1973 | ||
1974 | if (rs_priv->phymode == (u8) MODE_IEEE80211A) | |
1975 | base_rate = 0x800D; | |
1976 | else | |
1977 | base_rate = 0x820A; | |
1978 | ||
98d7e09a ZY |
1979 | if (rs_priv->dbg_fixed.rate_n_flags) { |
1980 | if (index < 12) | |
1981 | mcs->rate_n_flags = rs_priv->dbg_fixed.rate_n_flags; | |
1982 | else | |
4457e1a4 | 1983 | mcs->rate_n_flags = base_rate; |
98d7e09a ZY |
1984 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
1985 | return; | |
1986 | } | |
1987 | ||
1988 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
1989 | } | |
5ae212c9 | 1990 | |
98d7e09a ZY |
1991 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
1992 | const char __user *user_buf, size_t count, loff_t *ppos) | |
1993 | { | |
bb8c093b | 1994 | struct iwl4965_rate_scale_priv *rs_priv = file->private_data; |
98d7e09a ZY |
1995 | char buf[64]; |
1996 | int buf_size; | |
1997 | u32 parsed_rate; | |
1998 | ||
1999 | memset(buf, 0, sizeof(buf)); | |
2000 | buf_size = min(count, sizeof(buf) - 1); | |
2001 | if (copy_from_user(buf, user_buf, buf_size)) | |
2002 | return -EFAULT; | |
2003 | ||
2004 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
2005 | rs_priv->dbg_fixed.rate_n_flags = parsed_rate; | |
2006 | else | |
2007 | rs_priv->dbg_fixed.rate_n_flags = 0; | |
2008 | ||
2009 | rs_priv->active_rate = 0x0FFF; | |
2010 | rs_priv->active_siso_rate = 0x1FD0; | |
2011 | rs_priv->active_mimo_rate = 0x1FD0; | |
2012 | ||
2013 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
2014 | rs_priv->lq.sta_id, rs_priv->dbg_fixed.rate_n_flags); | |
2015 | ||
2016 | if (rs_priv->dbg_fixed.rate_n_flags) { | |
2017 | rs_fill_link_cmd(rs_priv, &rs_priv->dbg_fixed, &rs_priv->lq); | |
2018 | rs_send_lq_cmd(rs_priv->drv, &rs_priv->lq, CMD_ASYNC); | |
2019 | } | |
2020 | ||
2021 | return count; | |
2022 | } | |
0209dc11 | 2023 | |
5ae212c9 ZY |
2024 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2025 | char __user *user_buf, size_t count, loff_t *ppos) | |
2026 | { | |
2027 | char buff[1024]; | |
2028 | int desc = 0; | |
2029 | int i = 0; | |
2030 | ||
bb8c093b | 2031 | struct iwl4965_rate_scale_priv *rs_priv = file->private_data; |
5ae212c9 ZY |
2032 | |
2033 | desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id); | |
98d7e09a | 2034 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
5ae212c9 ZY |
2035 | rs_priv->total_failed, rs_priv->total_success, |
2036 | rs_priv->active_rate); | |
98d7e09a ZY |
2037 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
2038 | rs_priv->dbg_fixed.rate_n_flags); | |
5ae212c9 ZY |
2039 | desc += sprintf(buff+desc, "general:" |
2040 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
2041 | rs_priv->lq.general_params.flags, | |
2042 | rs_priv->lq.general_params.mimo_delimiter, | |
2043 | rs_priv->lq.general_params.single_stream_ant_msk, | |
2044 | rs_priv->lq.general_params.dual_stream_ant_msk); | |
2045 | ||
2046 | desc += sprintf(buff+desc, "agg:" | |
2047 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2048 | le16_to_cpu(rs_priv->lq.agg_params.agg_time_limit), | |
2049 | rs_priv->lq.agg_params.agg_dis_start_th, | |
2050 | rs_priv->lq.agg_params.agg_frame_cnt_limit); | |
2051 | ||
2052 | desc += sprintf(buff+desc, | |
2053 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2054 | rs_priv->lq.general_params.start_rate_index[0], | |
2055 | rs_priv->lq.general_params.start_rate_index[1], | |
2056 | rs_priv->lq.general_params.start_rate_index[2], | |
2057 | rs_priv->lq.general_params.start_rate_index[3]); | |
2058 | ||
2059 | ||
2060 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2061 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
2062 | i, le32_to_cpu(rs_priv->lq.rs_table[i].rate_n_flags)); | |
2063 | ||
2064 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2065 | } | |
2066 | ||
2067 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2068 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2069 | .read = rs_sta_dbgfs_scale_table_read, |
2070 | .open = open_file_generic, | |
2071 | }; | |
0209dc11 ZY |
2072 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2073 | char __user *user_buf, size_t count, loff_t *ppos) | |
2074 | { | |
2075 | char buff[1024]; | |
2076 | int desc = 0; | |
2077 | int i, j; | |
2078 | ||
bb8c093b | 2079 | struct iwl4965_rate_scale_priv *rs_priv = file->private_data; |
0209dc11 ZY |
2080 | for (i = 0; i < LQ_SIZE; i++) { |
2081 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2082 | "rate=0x%X\n", | |
2083 | rs_priv->active_tbl == i?"*":"x", | |
2084 | rs_priv->lq_info[i].lq_type, | |
2085 | rs_priv->lq_info[i].is_SGI, | |
2086 | rs_priv->lq_info[i].is_fat, | |
2087 | rs_priv->lq_info[i].is_dup, | |
2088 | rs_priv->lq_info[i].current_rate.rate_n_flags); | |
2089 | for (j = 0; j < IWL_RATE_COUNT; j++) { | |
2090 | desc += sprintf(buff+desc, | |
2091 | "counter=%d success=%d %%=%d\n", | |
2092 | rs_priv->lq_info[i].win[j].counter, | |
2093 | rs_priv->lq_info[i].win[j].success_counter, | |
2094 | rs_priv->lq_info[i].win[j].success_ratio); | |
2095 | } | |
2096 | } | |
2097 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2098 | } | |
2099 | ||
2100 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2101 | .read = rs_sta_dbgfs_stats_table_read, | |
2102 | .open = open_file_generic, | |
2103 | }; | |
5ae212c9 | 2104 | |
93dc646a ZY |
2105 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2106 | struct dentry *dir) | |
2107 | { | |
bb8c093b | 2108 | struct iwl4965_rate_scale_priv *rs_priv = priv_sta; |
5ae212c9 | 2109 | rs_priv->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 2110 | debugfs_create_file("rate_scale_table", 0600, dir, |
5ae212c9 | 2111 | rs_priv, &rs_sta_dbgfs_scale_table_ops); |
0209dc11 ZY |
2112 | rs_priv->rs_sta_dbgfs_stats_table_file = |
2113 | debugfs_create_file("rate_stats_table", 0600, dir, | |
2114 | rs_priv, &rs_sta_dbgfs_stats_table_ops); | |
93dc646a ZY |
2115 | } |
2116 | ||
2117 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2118 | { | |
bb8c093b | 2119 | struct iwl4965_rate_scale_priv *rs_priv = priv_sta; |
5ae212c9 | 2120 | debugfs_remove(rs_priv->rs_sta_dbgfs_scale_table_file); |
0209dc11 | 2121 | debugfs_remove(rs_priv->rs_sta_dbgfs_stats_table_file); |
93dc646a ZY |
2122 | } |
2123 | #endif | |
2124 | ||
b481de9c ZY |
2125 | static struct rate_control_ops rs_ops = { |
2126 | .module = NULL, | |
2127 | .name = RS_NAME, | |
2128 | .tx_status = rs_tx_status, | |
2129 | .get_rate = rs_get_rate, | |
2130 | .rate_init = rs_rate_init, | |
2131 | .clear = rs_clear, | |
2132 | .alloc = rs_alloc, | |
2133 | .free = rs_free, | |
2134 | .alloc_sta = rs_alloc_sta, | |
2135 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2136 | #ifdef CONFIG_MAC80211_DEBUGFS |
2137 | .add_sta_debugfs = rs_add_debugfs, | |
2138 | .remove_sta_debugfs = rs_remove_debugfs, | |
2139 | #endif | |
b481de9c ZY |
2140 | }; |
2141 | ||
bb8c093b | 2142 | int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) |
b481de9c ZY |
2143 | { |
2144 | struct ieee80211_local *local = hw_to_local(hw); | |
bb8c093b CH |
2145 | struct iwl4965_priv *priv = hw->priv; |
2146 | struct iwl4965_rate_scale_priv *rs_priv; | |
b481de9c ZY |
2147 | struct sta_info *sta; |
2148 | int count = 0, i; | |
2149 | u32 samples = 0, success = 0, good = 0; | |
2150 | unsigned long now = jiffies; | |
2151 | u32 max_time = 0; | |
2152 | u8 lq_type, antenna; | |
2153 | ||
2154 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); | |
2155 | if (!sta || !sta->rate_ctrl_priv) { | |
2156 | if (sta) { | |
2157 | sta_info_put(sta); | |
2158 | IWL_DEBUG_RATE("leave - no private rate data!\n"); | |
2159 | } else | |
2160 | IWL_DEBUG_RATE("leave - no station!\n"); | |
2161 | return sprintf(buf, "station %d not found\n", sta_id); | |
2162 | } | |
2163 | ||
2164 | rs_priv = (void *)sta->rate_ctrl_priv; | |
2165 | ||
2166 | lq_type = rs_priv->lq_info[rs_priv->active_tbl].lq_type; | |
2167 | antenna = rs_priv->lq_info[rs_priv->active_tbl].antenna_type; | |
2168 | ||
2169 | if (is_legacy(lq_type)) | |
2170 | i = IWL_RATE_54M_INDEX; | |
2171 | else | |
2172 | i = IWL_RATE_60M_INDEX; | |
2173 | while (1) { | |
2174 | u64 mask; | |
2175 | int j; | |
2176 | int active = rs_priv->active_tbl; | |
2177 | ||
2178 | count += | |
bb8c093b | 2179 | sprintf(&buf[count], " %2dMbs: ", iwl4965_rates[i].ieee / 2); |
b481de9c ZY |
2180 | |
2181 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2182 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
2183 | buf[count++] = | |
2184 | (rs_priv->lq_info[active].win[i].data & mask) | |
2185 | ? '1' : '0'; | |
2186 | ||
2187 | samples += rs_priv->lq_info[active].win[i].counter; | |
2188 | good += rs_priv->lq_info[active].win[i].success_counter; | |
2189 | success += rs_priv->lq_info[active].win[i].success_counter * | |
bb8c093b | 2190 | iwl4965_rates[i].ieee; |
b481de9c ZY |
2191 | |
2192 | if (rs_priv->lq_info[active].win[i].stamp) { | |
2193 | int delta = | |
2194 | jiffies_to_msecs(now - | |
2195 | rs_priv->lq_info[active].win[i].stamp); | |
2196 | ||
2197 | if (delta > max_time) | |
2198 | max_time = delta; | |
2199 | ||
2200 | count += sprintf(&buf[count], "%5dms\n", delta); | |
2201 | } else | |
2202 | buf[count++] = '\n'; | |
2203 | ||
bb8c093b | 2204 | j = iwl4965_get_prev_ieee_rate(i); |
b481de9c ZY |
2205 | if (j == i) |
2206 | break; | |
2207 | i = j; | |
2208 | } | |
2209 | ||
2210 | /* Display the average rate of all samples taken. | |
2211 | * | |
2212 | * NOTE: We multiple # of samples by 2 since the IEEE measurement | |
bb8c093b | 2213 | * added from iwl4965_rates is actually 2X the rate */ |
b481de9c ZY |
2214 | if (samples) |
2215 | count += sprintf(&buf[count], | |
2216 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" | |
2217 | "%3d%% success (%d good packets over %d tries)\n", | |
2218 | success / (2 * samples), (success * 5 / samples) % 10, | |
2219 | max_time, good * 100 / samples, good, samples); | |
2220 | else | |
2221 | count += sprintf(&buf[count], "\nAverage rate: 0Mbs\n"); | |
01ebd063 | 2222 | count += sprintf(&buf[count], "\nrate scale type %d antenna %d " |
b481de9c ZY |
2223 | "active_search %d rate index %d\n", lq_type, antenna, |
2224 | rs_priv->search_better_tbl, sta->last_txrate); | |
2225 | ||
2226 | sta_info_put(sta); | |
2227 | return count; | |
2228 | } | |
2229 | ||
bb8c093b | 2230 | void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) |
b481de9c | 2231 | { |
bb8c093b | 2232 | struct iwl4965_priv *priv = hw->priv; |
b481de9c ZY |
2233 | |
2234 | priv->lq_mngr.lq_ready = 1; | |
2235 | } | |
2236 | ||
bb8c093b | 2237 | void iwl4965_rate_control_register(struct ieee80211_hw *hw) |
b481de9c ZY |
2238 | { |
2239 | ieee80211_rate_control_register(&rs_ops); | |
2240 | } | |
2241 | ||
bb8c093b | 2242 | void iwl4965_rate_control_unregister(struct ieee80211_hw *hw) |
b481de9c ZY |
2243 | { |
2244 | ieee80211_rate_control_unregister(&rs_ops); | |
2245 | } | |
2246 |