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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
1f447808 | 3 | * Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved. |
b481de9c ZY |
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: | |
759ef89f | 22 | * Intel Linux Wireless <ilw@linux.intel.com> |
b481de9c ZY |
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> | |
b481de9c ZY |
31 | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
3e0d4cb1 | 38 | #include "iwl-dev.h" |
be1f3ab6 | 39 | #include "iwl-sta.h" |
857485c0 | 40 | #include "iwl-core.h" |
b481de9c | 41 | |
e227ceac | 42 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 43 | |
aade00ce | 44 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
45 | #define IWL_NUMBER_TRY 1 |
46 | #define IWL_HT_NUMBER_TRY 3 | |
47 | ||
77626355 BC |
48 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
49 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
50 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
51 | ||
7d049e5a AM |
52 | /* max allowed rate miss before sync LQ cmd */ |
53 | #define IWL_MISSED_RATE_MAX 15 | |
77626355 | 54 | /* max time to accum history 2 seconds */ |
447fee70 | 55 | #define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ) |
b481de9c ZY |
56 | |
57 | static u8 rs_ht_to_legacy[] = { | |
58 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
62 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
63 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
64 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
65 | }; | |
66 | ||
aade00ce GC |
67 | static const u8 ant_toggle_lookup[] = { |
68 | /*ANT_NONE -> */ ANT_NONE, | |
69 | /*ANT_A -> */ ANT_B, | |
70 | /*ANT_B -> */ ANT_C, | |
71 | /*ANT_AB -> */ ANT_BC, | |
72 | /*ANT_C -> */ ANT_A, | |
73 | /*ANT_AC -> */ ANT_AB, | |
74 | /*ANT_BC -> */ ANT_AC, | |
75 | /*ANT_ABC -> */ ANT_ABC, | |
76 | }; | |
77 | ||
c79dd5b5 | 78 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 79 | struct sk_buff *skb, |
4b7679a5 JB |
80 | struct ieee80211_sta *sta, |
81 | struct iwl_lq_sta *lq_sta); | |
46f9381a | 82 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 83 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
b481de9c ZY |
84 | |
85 | ||
98d7e09a | 86 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
87 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
88 | u32 *rate_n_flags, int index); | |
98d7e09a | 89 | #else |
e227ceac TW |
90 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
91 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
92 | {} |
93 | #endif | |
77626355 | 94 | |
e3949d62 DH |
95 | /** |
96 | * The following tables contain the expected throughput metrics for all rates | |
97 | * | |
98 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
99 | * | |
100 | * where invalid entries are zeros. | |
101 | * | |
102 | * CCK rates are only valid in legacy table and will only be used in G | |
103 | * (2.4 GHz) band. | |
77626355 | 104 | */ |
584a0f00 | 105 | |
e3949d62 DH |
106 | static s32 expected_tpt_legacy[IWL_RATE_COUNT] = { |
107 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 | |
b481de9c ZY |
108 | }; |
109 | ||
e3949d62 DH |
110 | static s32 expected_tpt_siso20MHz[4][IWL_RATE_COUNT] = { |
111 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 158, 183, 193, 202}, /* Norm */ | |
112 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 167, 192, 202, 210}, /* SGI */ | |
113 | {0, 0, 0, 0, 48, 0, 93, 135, 176, 251, 319, 351, 381}, /* AGG */ | |
114 | {0, 0, 0, 0, 53, 0, 102, 149, 193, 275, 348, 381, 413}, /* AGG+SGI */ | |
b481de9c ZY |
115 | }; |
116 | ||
e3949d62 DH |
117 | static s32 expected_tpt_siso40MHz[4][IWL_RATE_COUNT] = { |
118 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ | |
119 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ | |
120 | {0, 0, 0, 0, 96, 0, 182, 259, 328, 451, 553, 598, 640}, /* AGG */ | |
121 | {0, 0, 0, 0, 106, 0, 199, 282, 357, 487, 593, 640, 683}, /* AGG+SGI */ | |
b481de9c ZY |
122 | }; |
123 | ||
e3949d62 DH |
124 | static s32 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
125 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250}, /* Norm */ | |
126 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256}, /* SGI */ | |
127 | {0, 0, 0, 0, 92, 0, 175, 250, 317, 436, 534, 578, 619}, /* AGG */ | |
128 | {0, 0, 0, 0, 102, 0, 192, 273, 344, 470, 573, 619, 660}, /* AGG+SGI*/ | |
b481de9c ZY |
129 | }; |
130 | ||
e3949d62 DH |
131 | static s32 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
132 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ | |
133 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ | |
134 | {0, 0, 0, 0, 180, 0, 327, 446, 545, 708, 828, 878, 922}, /* AGG */ | |
135 | {0, 0, 0, 0, 197, 0, 355, 481, 584, 752, 872, 922, 966}, /* AGG+SGI */ | |
b481de9c ZY |
136 | }; |
137 | ||
e3949d62 DH |
138 | static s32 expected_tpt_mimo3_20MHz[4][IWL_RATE_COUNT] = { |
139 | {0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268}, /* Norm */ | |
140 | {0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273}, /* SGI */ | |
141 | {0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775}, /* AGG */ | |
142 | {0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818}, /* AGG+SGI */ | |
584a0f00 WYG |
143 | }; |
144 | ||
e3949d62 DH |
145 | static s32 expected_tpt_mimo3_40MHz[4][IWL_RATE_COUNT] = { |
146 | {0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297}, /* Norm */ | |
147 | {0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300}, /* SGI */ | |
148 | {0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070}, /* AGG */ | |
149 | {0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109}, /* AGG+SGI */ | |
584a0f00 WYG |
150 | }; |
151 | ||
12b96817 | 152 | /* mbps, mcs */ |
79496738 | 153 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { |
e3949d62 DH |
154 | { "1", "BPSK DSSS"}, |
155 | { "2", "QPSK DSSS"}, | |
156 | {"5.5", "BPSK CCK"}, | |
157 | { "11", "QPSK CCK"}, | |
158 | { "6", "BPSK 1/2"}, | |
159 | { "9", "BPSK 1/2"}, | |
160 | { "12", "QPSK 1/2"}, | |
161 | { "18", "QPSK 3/4"}, | |
162 | { "24", "16QAM 1/2"}, | |
163 | { "36", "16QAM 3/4"}, | |
164 | { "48", "64QAM 2/3"}, | |
165 | { "54", "64QAM 3/4"}, | |
166 | { "60", "64QAM 5/6"}, | |
12b96817 WYG |
167 | }; |
168 | ||
a9c146b3 WYG |
169 | #define MCS_INDEX_PER_STREAM (8) |
170 | ||
39e88504 | 171 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
172 | { |
173 | return (u8)(rate_n_flags & 0xFF); | |
174 | } | |
175 | ||
e227ceac | 176 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
177 | { |
178 | window->data = 0; | |
179 | window->success_counter = 0; | |
180 | window->success_ratio = IWL_INVALID_VALUE; | |
181 | window->counter = 0; | |
182 | window->average_tpt = IWL_INVALID_VALUE; | |
183 | window->stamp = 0; | |
b481de9c ZY |
184 | } |
185 | ||
aade00ce GC |
186 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
187 | { | |
3ac7f146 | 188 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
189 | } |
190 | ||
0c11b4de RR |
191 | /* |
192 | * removes the old data from the statistics. All data that is older than | |
193 | * TID_MAX_TIME_DIFF, will be deleted. | |
194 | */ | |
e227ceac | 195 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
196 | { |
197 | /* The oldest age we want to keep */ | |
198 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
199 | ||
200 | while (tl->queue_count && | |
201 | (tl->time_stamp < oldest_time)) { | |
202 | tl->total -= tl->packet_count[tl->head]; | |
203 | tl->packet_count[tl->head] = 0; | |
204 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
205 | tl->queue_count--; | |
206 | tl->head++; | |
207 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
208 | tl->head = 0; | |
209 | } | |
210 | } | |
211 | ||
212 | /* | |
213 | * increment traffic load value for tid and also remove | |
214 | * any old values if passed the certain time period | |
215 | */ | |
e227ceac | 216 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 217 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
218 | { |
219 | u32 curr_time = jiffies_to_msecs(jiffies); | |
220 | u32 time_diff; | |
221 | s32 index; | |
e227ceac | 222 | struct iwl_traffic_load *tl = NULL; |
54dbb525 | 223 | u8 tid; |
0c11b4de | 224 | |
417f114b | 225 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
fd7c8a40 | 226 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
54dbb525 TW |
227 | tid = qc[0] & 0xf; |
228 | } else | |
faa29718 | 229 | return MAX_TID_COUNT; |
0c11b4de | 230 | |
e6a6cf4c RC |
231 | if (unlikely(tid >= TID_MAX_LOAD_COUNT)) |
232 | return MAX_TID_COUNT; | |
233 | ||
0c11b4de RR |
234 | tl = &lq_data->load[tid]; |
235 | ||
236 | curr_time -= curr_time % TID_ROUND_VALUE; | |
237 | ||
238 | /* Happens only for the first packet. Initialize the data */ | |
239 | if (!(tl->queue_count)) { | |
240 | tl->total = 1; | |
241 | tl->time_stamp = curr_time; | |
242 | tl->queue_count = 1; | |
243 | tl->head = 0; | |
244 | tl->packet_count[0] = 1; | |
faa29718 | 245 | return MAX_TID_COUNT; |
0c11b4de RR |
246 | } |
247 | ||
248 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
249 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
250 | ||
251 | /* The history is too long: remove data that is older than */ | |
252 | /* TID_MAX_TIME_DIFF */ | |
253 | if (index >= TID_QUEUE_MAX_SIZE) | |
254 | rs_tl_rm_old_stats(tl, curr_time); | |
255 | ||
256 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
257 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
258 | tl->total = tl->total + 1; | |
259 | ||
260 | if ((index + 1) > tl->queue_count) | |
261 | tl->queue_count = index + 1; | |
faa29718 RR |
262 | |
263 | return tid; | |
0c11b4de RR |
264 | } |
265 | ||
266 | /* | |
267 | get the traffic load value for tid | |
268 | */ | |
e227ceac | 269 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
270 | { |
271 | u32 curr_time = jiffies_to_msecs(jiffies); | |
272 | u32 time_diff; | |
273 | s32 index; | |
e227ceac | 274 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
275 | |
276 | if (tid >= TID_MAX_LOAD_COUNT) | |
277 | return 0; | |
278 | ||
279 | tl = &(lq_data->load[tid]); | |
280 | ||
281 | curr_time -= curr_time % TID_ROUND_VALUE; | |
282 | ||
283 | if (!(tl->queue_count)) | |
284 | return 0; | |
285 | ||
286 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
287 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
288 | ||
289 | /* The history is too long: remove data that is older than */ | |
290 | /* TID_MAX_TIME_DIFF */ | |
291 | if (index >= TID_QUEUE_MAX_SIZE) | |
292 | rs_tl_rm_old_stats(tl, curr_time); | |
293 | ||
294 | return tl->total; | |
295 | } | |
296 | ||
c79dd5b5 | 297 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 298 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 299 | struct ieee80211_sta *sta) |
0c11b4de | 300 | { |
45d42700 WYG |
301 | int ret; |
302 | ||
ff550cb4 | 303 | if (rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { |
e1623446 | 304 | IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
e174961c | 305 | sta->addr, tid); |
45d42700 WYG |
306 | ret = ieee80211_start_tx_ba_session(sta, tid); |
307 | if (ret == -EAGAIN) { | |
308 | /* | |
309 | * driver and mac80211 is out of sync | |
310 | * this might be cause by reloading firmware | |
311 | * stop the tx ba session here | |
312 | */ | |
313 | IWL_DEBUG_HT(priv, "Fail start Tx agg on tid: %d\n", | |
314 | tid); | |
315 | ret = ieee80211_stop_tx_ba_session(sta, tid, | |
316 | WLAN_BACK_INITIATOR); | |
317 | } | |
0c11b4de RR |
318 | } |
319 | } | |
320 | ||
c79dd5b5 | 321 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 322 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 323 | struct ieee80211_sta *sta) |
0c11b4de RR |
324 | { |
325 | if ((tid < TID_MAX_LOAD_COUNT)) | |
326 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
327 | else if (tid == IWL_AGG_ALL_TID) | |
328 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
329 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
47eef9bd WYG |
330 | if (priv->cfg->use_rts_for_ht) { |
331 | /* | |
332 | * switch to RTS/CTS if it is the prefer protection method | |
333 | * for HT traffic | |
334 | */ | |
335 | IWL_DEBUG_HT(priv, "use RTS/CTS protection for HT\n"); | |
336 | priv->staging_rxon.flags &= ~RXON_FLG_SELF_CTS_EN; | |
337 | iwlcore_commit_rxon(priv); | |
338 | } | |
0c11b4de RR |
339 | } |
340 | ||
39e88504 | 341 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 342 | { |
3ac7f146 TW |
343 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
344 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
345 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
346 | } |
347 | ||
77626355 BC |
348 | /** |
349 | * rs_collect_tx_data - Update the success/failure sliding window | |
350 | * | |
351 | * We keep a sliding window of the last 62 packets transmitted | |
352 | * at this rate. window->data contains the bitmask of successful | |
353 | * packets. | |
354 | */ | |
e227ceac | 355 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
e3949d62 | 356 | int scale_index, s32 tpt, int attempts, |
99556438 | 357 | int successes) |
b481de9c | 358 | { |
e227ceac | 359 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 360 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
361 | s32 fail_count; |
362 | ||
dc2453ae TW |
363 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
364 | return -EINVAL; | |
b481de9c | 365 | |
e3949d62 | 366 | /* Select window for current tx bit rate */ |
b481de9c ZY |
367 | window = &(windows[scale_index]); |
368 | ||
77626355 BC |
369 | /* |
370 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
371 | * history window; anything older isn't really relevant any more. | |
372 | * If we have filled up the sliding window, drop the oldest attempt; | |
373 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
374 | * subtract "1" from the success counter (this is the main reason | |
375 | * we keep these bitmaps!). | |
376 | */ | |
e3949d62 | 377 | while (attempts > 0) { |
39e88504 GC |
378 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
379 | ||
380 | /* remove earliest */ | |
381 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
382 | ||
99556438 RR |
383 | if (window->data & mask) { |
384 | window->data &= ~mask; | |
39e88504 | 385 | window->success_counter--; |
99556438 | 386 | } |
b481de9c | 387 | } |
b481de9c | 388 | |
99556438 RR |
389 | /* Increment frames-attempted counter */ |
390 | window->counter++; | |
391 | ||
e3949d62 | 392 | /* Shift bitmap by one frame to throw away oldest history */ |
90d7795e | 393 | window->data <<= 1; |
e3949d62 DH |
394 | |
395 | /* Mark the most recent #successes attempts as successful */ | |
99556438 | 396 | if (successes > 0) { |
39e88504 | 397 | window->success_counter++; |
99556438 RR |
398 | window->data |= 0x1; |
399 | successes--; | |
400 | } | |
77626355 | 401 | |
e3949d62 | 402 | attempts--; |
b481de9c ZY |
403 | } |
404 | ||
77626355 | 405 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
406 | if (window->counter > 0) |
407 | window->success_ratio = 128 * (100 * window->success_counter) | |
408 | / window->counter; | |
409 | else | |
410 | window->success_ratio = IWL_INVALID_VALUE; | |
411 | ||
412 | fail_count = window->counter - window->success_counter; | |
413 | ||
77626355 | 414 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
415 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
416 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
417 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
418 | else | |
419 | window->average_tpt = IWL_INVALID_VALUE; | |
420 | ||
77626355 | 421 | /* Tag this window as having been updated */ |
b481de9c ZY |
422 | window->stamp = jiffies; |
423 | ||
dc2453ae | 424 | return 0; |
b481de9c ZY |
425 | } |
426 | ||
77626355 BC |
427 | /* |
428 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
429 | */ | |
39e88504 | 430 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
431 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
432 | struct iwl_scale_tbl_info *tbl, | |
433 | int index, u8 use_green) | |
b481de9c | 434 | { |
39e88504 GC |
435 | u32 rate_n_flags = 0; |
436 | ||
b481de9c | 437 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 438 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 439 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 440 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 441 | |
fde0db31 GC |
442 | } else if (is_Ht(tbl->lq_type)) { |
443 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 444 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 445 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 446 | } |
39e88504 | 447 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
448 | |
449 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 450 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 451 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 452 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 453 | else |
1826dcc0 | 454 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 455 | } else { |
978785a3 | 456 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
457 | } |
458 | ||
39e88504 | 459 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 460 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 461 | |
39e88504 | 462 | if (is_Ht(tbl->lq_type)) { |
7aafef1c | 463 | if (tbl->is_ht40) { |
39e88504 GC |
464 | if (tbl->is_dup) |
465 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
466 | else | |
7aafef1c | 467 | rate_n_flags |= RATE_MCS_HT40_MSK; |
39e88504 GC |
468 | } |
469 | if (tbl->is_SGI) | |
470 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
471 | ||
472 | if (use_green) { | |
473 | rate_n_flags |= RATE_MCS_GF_MSK; | |
474 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
475 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 476 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
477 | } |
478 | } | |
b481de9c | 479 | } |
39e88504 | 480 | return rate_n_flags; |
b481de9c ZY |
481 | } |
482 | ||
77626355 BC |
483 | /* |
484 | * Interpret uCode API's rate_n_flags format, | |
485 | * fill "search" or "active" tx mode table. | |
486 | */ | |
39e88504 | 487 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 488 | enum ieee80211_band band, |
e227ceac | 489 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
490 | int *rate_idx) |
491 | { | |
39e88504 GC |
492 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
493 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
494 | u8 mcs; | |
b481de9c | 495 | |
e7d326ac | 496 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 497 | |
fde0db31 | 498 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 499 | *rate_idx = -1; |
dc2453ae | 500 | return -EINVAL; |
b481de9c | 501 | } |
77626355 | 502 | tbl->is_SGI = 0; /* default legacy setup */ |
7aafef1c | 503 | tbl->is_ht40 = 0; |
b481de9c | 504 | tbl->is_dup = 0; |
fde0db31 GC |
505 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
506 | tbl->lq_type = LQ_NONE; | |
d6e93399 | 507 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c | 508 | |
77626355 | 509 | /* legacy rate format */ |
39e88504 | 510 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 511 | if (num_of_ant == 1) { |
8318d78a | 512 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
513 | tbl->lq_type = LQ_A; |
514 | else | |
515 | tbl->lq_type = LQ_G; | |
b481de9c | 516 | } |
fde0db31 | 517 | /* HT rate format */ |
b481de9c | 518 | } else { |
39e88504 | 519 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
520 | tbl->is_SGI = 1; |
521 | ||
7aafef1c | 522 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || |
39e88504 | 523 | (rate_n_flags & RATE_MCS_DUP_MSK)) |
7aafef1c | 524 | tbl->is_ht40 = 1; |
b481de9c | 525 | |
39e88504 | 526 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 527 | tbl->is_dup = 1; |
fde0db31 | 528 | |
39e88504 | 529 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 530 | |
39e88504 GC |
531 | /* SISO */ |
532 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
533 | if (num_of_ant == 1) |
534 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
535 | /* MIMO2 */ | |
39e88504 | 536 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
537 | if (num_of_ant == 2) |
538 | tbl->lq_type = LQ_MIMO2; | |
539 | /* MIMO3 */ | |
540 | } else { | |
d6e93399 MA |
541 | if (num_of_ant == 3) { |
542 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; | |
fde0db31 | 543 | tbl->lq_type = LQ_MIMO3; |
d6e93399 | 544 | } |
fde0db31 | 545 | } |
b481de9c ZY |
546 | } |
547 | return 0; | |
548 | } | |
aade00ce GC |
549 | |
550 | /* switch to another antenna/antennas and return 1 */ | |
551 | /* if no other valid antenna found, return 0 */ | |
552 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 553 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 554 | { |
aade00ce GC |
555 | u8 new_ant_type; |
556 | ||
557 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
558 | return 0; | |
559 | ||
560 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
561 | return 0; | |
562 | ||
563 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
564 | ||
565 | while ((new_ant_type != tbl->ant_type) && | |
566 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
567 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
568 | ||
569 | if (new_ant_type == tbl->ant_type) | |
570 | return 0; | |
571 | ||
572 | tbl->ant_type = new_ant_type; | |
573 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
574 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
575 | return 1; | |
b481de9c ZY |
576 | } |
577 | ||
b261793d DH |
578 | /** |
579 | * Green-field mode is valid if the station supports it and | |
580 | * there are no non-GF stations present in the BSS. | |
581 | */ | |
582 | static inline u8 rs_use_green(struct ieee80211_sta *sta, | |
fad95bf5 | 583 | struct iwl_ht_config *ht_conf) |
b481de9c | 584 | { |
b261793d DH |
585 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
586 | !(ht_conf->non_GF_STA_present); | |
b481de9c ZY |
587 | } |
588 | ||
589 | /** | |
590 | * rs_get_supported_rates - get the available rates | |
591 | * | |
592 | * if management frame or broadcast frame only return | |
593 | * basic available rates. | |
594 | * | |
595 | */ | |
e227ceac TW |
596 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
597 | struct ieee80211_hdr *hdr, | |
598 | enum iwl_table_type rate_type) | |
b481de9c | 599 | { |
eecd6e57 GC |
600 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
601 | lq_sta->active_rate_basic) | |
602 | return lq_sta->active_rate_basic; | |
603 | ||
604 | if (is_legacy(rate_type)) { | |
605 | return lq_sta->active_legacy_rate; | |
606 | } else { | |
b481de9c | 607 | if (is_siso(rate_type)) |
eecd6e57 | 608 | return lq_sta->active_siso_rate; |
fde0db31 | 609 | else if (is_mimo2(rate_type)) |
eecd6e57 | 610 | return lq_sta->active_mimo2_rate; |
b481de9c | 611 | else |
eecd6e57 | 612 | return lq_sta->active_mimo3_rate; |
c33104f0 | 613 | } |
b481de9c ZY |
614 | } |
615 | ||
bf403db8 EK |
616 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
617 | int rate_type) | |
b481de9c ZY |
618 | { |
619 | u8 high = IWL_RATE_INVALID; | |
620 | u8 low = IWL_RATE_INVALID; | |
621 | ||
01ebd063 | 622 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
623 | * the rate table */ |
624 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
625 | int i; | |
626 | u32 mask; | |
627 | ||
628 | /* Find the previous rate that is in the rate mask */ | |
629 | i = index - 1; | |
630 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
631 | if (rate_mask & mask) { | |
632 | low = i; | |
633 | break; | |
634 | } | |
635 | } | |
636 | ||
637 | /* Find the next rate that is in the rate mask */ | |
638 | i = index + 1; | |
639 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
640 | if (rate_mask & mask) { | |
641 | high = i; | |
642 | break; | |
643 | } | |
644 | } | |
645 | ||
646 | return (high << 8) | low; | |
647 | } | |
648 | ||
649 | low = index; | |
650 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 651 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
652 | if (low == IWL_RATE_INVALID) |
653 | break; | |
654 | if (rate_mask & (1 << low)) | |
655 | break; | |
e1623446 | 656 | IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
b481de9c ZY |
657 | } |
658 | ||
659 | high = index; | |
660 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 661 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
662 | if (high == IWL_RATE_INVALID) |
663 | break; | |
664 | if (rate_mask & (1 << high)) | |
665 | break; | |
e1623446 | 666 | IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
b481de9c ZY |
667 | } |
668 | ||
669 | return (high << 8) | low; | |
670 | } | |
671 | ||
e227ceac TW |
672 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
673 | struct iwl_scale_tbl_info *tbl, | |
674 | u8 scale_index, u8 ht_possible) | |
b481de9c | 675 | { |
b481de9c ZY |
676 | s32 low; |
677 | u16 rate_mask; | |
678 | u16 high_low; | |
679 | u8 switch_to_legacy = 0; | |
c33104f0 | 680 | u8 is_green = lq_sta->is_green; |
2ff6578b | 681 | struct iwl_priv *priv = lq_sta->drv; |
b481de9c ZY |
682 | |
683 | /* check if we need to switch from HT to legacy rates. | |
684 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
685 | * are always supported (spec demand) */ | |
686 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
687 | switch_to_legacy = 1; | |
688 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 689 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
690 | tbl->lq_type = LQ_A; |
691 | else | |
692 | tbl->lq_type = LQ_G; | |
693 | ||
69fdb309 | 694 | if (num_of_ant(tbl->ant_type) > 1) |
2ff6578b WYG |
695 | tbl->ant_type = |
696 | first_antenna(priv->hw_params.valid_tx_ant); | |
b481de9c | 697 | |
7aafef1c | 698 | tbl->is_ht40 = 0; |
b481de9c | 699 | tbl->is_SGI = 0; |
d6e93399 | 700 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c ZY |
701 | } |
702 | ||
eecd6e57 | 703 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 704 | |
77626355 | 705 | /* Mask with station rate restriction */ |
b481de9c | 706 | if (is_legacy(tbl->lq_type)) { |
77626355 | 707 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 708 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 709 | rate_mask = (u16)(rate_mask & |
c33104f0 | 710 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 711 | else |
c33104f0 | 712 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
713 | } |
714 | ||
77626355 | 715 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 716 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
717 | low = scale_index; |
718 | goto out; | |
b481de9c ZY |
719 | } |
720 | ||
bf403db8 EK |
721 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
722 | tbl->lq_type); | |
b481de9c ZY |
723 | low = high_low & 0xff; |
724 | ||
39e88504 GC |
725 | if (low == IWL_RATE_INVALID) |
726 | low = scale_index; | |
727 | ||
728 | out: | |
978785a3 | 729 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
730 | } |
731 | ||
95407aa4 DH |
732 | /* |
733 | * Simple function to compare two rate scale table types | |
734 | */ | |
735 | static bool table_type_matches(struct iwl_scale_tbl_info *a, | |
736 | struct iwl_scale_tbl_info *b) | |
737 | { | |
738 | return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) && | |
739 | (a->is_SGI == b->is_SGI); | |
740 | } | |
741 | /* | |
742 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
743 | * that wraps a NULL pointer check | |
744 | */ | |
745 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
746 | { | |
747 | if (tbl->expected_tpt) | |
748 | return tbl->expected_tpt[rs_index]; | |
749 | return 0; | |
750 | } | |
751 | ||
77626355 BC |
752 | /* |
753 | * mac80211 sends us Tx status | |
754 | */ | |
4b7679a5 JB |
755 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
756 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 757 | struct sk_buff *skb) |
b481de9c | 758 | { |
95407aa4 DH |
759 | int legacy_success; |
760 | int retries; | |
761 | int rs_index, mac_index, i; | |
417f114b | 762 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 763 | struct iwl_link_quality_cmd *table; |
b481de9c | 764 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 | 765 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
e039fa4a | 766 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac | 767 | struct iwl_rate_scale_data *window = NULL; |
5027309b | 768 | enum mac80211_rate_control_flags mac_flags; |
39e88504 | 769 | u32 tx_rate; |
e227ceac | 770 | struct iwl_scale_tbl_info tbl_type; |
95407aa4 | 771 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl; |
b481de9c ZY |
772 | s32 tpt = 0; |
773 | ||
e1623446 | 774 | IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
b481de9c | 775 | |
417f114b | 776 | if (!ieee80211_is_data(hdr->frame_control) || |
514d65c1 | 777 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c ZY |
778 | return; |
779 | ||
e3949d62 | 780 | /* This packet was aggregated but doesn't carry status info */ |
e039fa4a JB |
781 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
782 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
783 | return; |
784 | ||
05c914fe | 785 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 786 | !lq_sta->ibss_sta_added) |
95407aa4 | 787 | return; |
b481de9c | 788 | |
77626355 BC |
789 | /* |
790 | * Ignore this Tx frame response if its initial rate doesn't match | |
791 | * that of latest Link Quality command. There may be stragglers | |
792 | * from a previous Link Quality command, but we're no longer interested | |
793 | * in those; they're either from the "active" mode while we're trying | |
794 | * to check "search" mode, or a prior "search" mode after we've moved | |
795 | * to a new "search" mode (which might become the new "active" mode). | |
796 | */ | |
95407aa4 | 797 | table = &lq_sta->lq; |
39e88504 GC |
798 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
799 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
800 | if (priv->band == IEEE80211_BAND_5GHZ) |
801 | rs_index -= IWL_FIRST_OFDM_RATE; | |
5027309b DH |
802 | mac_flags = info->status.rates[0].flags; |
803 | mac_index = info->status.rates[0].idx; | |
31513be8 DH |
804 | /* For HT packets, map MCS to PLCP */ |
805 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
806 | mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ | |
807 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
808 | mac_index++; | |
392a0baf DH |
809 | /* |
810 | * mac80211 HT index is always zero-indexed; we need to move | |
811 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
812 | */ | |
813 | if (priv->band == IEEE80211_BAND_2GHZ) | |
814 | mac_index += IWL_FIRST_OFDM_RATE; | |
31513be8 | 815 | } |
95407aa4 | 816 | /* Here we actually compare this rate to the latest LQ command */ |
5027309b DH |
817 | if ((mac_index < 0) || |
818 | (tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || | |
819 | (tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
820 | (tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) || | |
e6a9854b | 821 | (tbl_type.ant_type != info->antenna_sel_tx) || |
5027309b DH |
822 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) || |
823 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
31513be8 DH |
824 | (rs_index != mac_index)) { |
825 | IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate); | |
95407aa4 DH |
826 | /* |
827 | * Since rates mis-match, the last LQ command may have failed. | |
828 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
829 | * ... driver. | |
d5e49036 | 830 | */ |
7d049e5a AM |
831 | lq_sta->missed_rate_counter++; |
832 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
833 | lq_sta->missed_rate_counter = 0; | |
834 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
835 | } | |
95407aa4 DH |
836 | /* Regardless, ignore this status info for outdated rate */ |
837 | return; | |
838 | } else | |
839 | /* Rate did match, so reset the missed_rate_counter */ | |
840 | lq_sta->missed_rate_counter = 0; | |
841 | ||
842 | /* Figure out if rate scale algorithm is in active or search table */ | |
843 | if (table_type_matches(&tbl_type, | |
844 | &(lq_sta->lq_info[lq_sta->active_tbl]))) { | |
845 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
846 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
847 | } else if (table_type_matches(&tbl_type, | |
848 | &lq_sta->lq_info[1 - lq_sta->active_tbl])) { | |
849 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
850 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
851 | } else { | |
852 | IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n"); | |
853 | return; | |
b481de9c | 854 | } |
95407aa4 | 855 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
b481de9c | 856 | |
95407aa4 DH |
857 | /* |
858 | * Updating the frame history depends on whether packets were | |
859 | * aggregated. | |
860 | * | |
861 | * For aggregation, all packets were transmitted at the same rate, the | |
862 | * first index into rate scale table. | |
863 | */ | |
864 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
865 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
866 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, | |
867 | &rs_index); | |
868 | tpt = get_expected_tpt(curr_tbl, rs_index); | |
869 | rs_collect_tx_data(window, rs_index, tpt, | |
870 | info->status.ampdu_ack_len, | |
871 | info->status.ampdu_ack_map); | |
872 | ||
873 | /* Update success/fail counts if not searching for new mode */ | |
874 | if (lq_sta->stay_in_tbl) { | |
875 | lq_sta->total_success += info->status.ampdu_ack_map; | |
876 | lq_sta->total_failed += (info->status.ampdu_ack_len - | |
877 | info->status.ampdu_ack_map); | |
b481de9c | 878 | } |
95407aa4 | 879 | } else { |
77626355 | 880 | /* |
95407aa4 | 881 | * For legacy, update frame history with for each Tx retry. |
77626355 | 882 | */ |
95407aa4 DH |
883 | retries = info->status.rates[0].count - 1; |
884 | /* HW doesn't send more than 15 retries */ | |
885 | retries = min(retries, 15); | |
886 | ||
887 | /* The last transmission may have been successful */ | |
888 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
889 | /* Collect data for each rate used during failed TX attempts */ | |
890 | for (i = 0; i <= retries; ++i) { | |
891 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
892 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
893 | &tbl_type, &rs_index); | |
894 | /* | |
895 | * Only collect stats if retried rate is in the same RS | |
896 | * table as active/search. | |
897 | */ | |
898 | if (table_type_matches(&tbl_type, curr_tbl)) | |
899 | tpt = get_expected_tpt(curr_tbl, rs_index); | |
900 | else if (table_type_matches(&tbl_type, other_tbl)) | |
901 | tpt = get_expected_tpt(other_tbl, rs_index); | |
902 | else | |
903 | continue; | |
b481de9c | 904 | |
95407aa4 DH |
905 | /* Constants mean 1 transmission, 0 successes */ |
906 | if (i < retries) | |
907 | rs_collect_tx_data(window, rs_index, tpt, 1, | |
908 | 0); | |
99556438 | 909 | else |
95407aa4 DH |
910 | rs_collect_tx_data(window, rs_index, tpt, 1, |
911 | legacy_success); | |
912 | } | |
913 | ||
914 | /* Update success/fail counts if not searching for new mode */ | |
915 | if (lq_sta->stay_in_tbl) { | |
916 | lq_sta->total_success += legacy_success; | |
917 | lq_sta->total_failed += retries + (1 - legacy_success); | |
99556438 | 918 | } |
b481de9c | 919 | } |
95407aa4 DH |
920 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ |
921 | lq_sta->last_rate_n_flags = tx_rate; | |
b481de9c | 922 | |
77626355 | 923 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c | 924 | if (sta && sta->supp_rates[sband->band]) |
514d65c1 | 925 | rs_rate_scale_perform(priv, skb, sta, lq_sta); |
b481de9c ZY |
926 | } |
927 | ||
77626355 BC |
928 | /* |
929 | * Begin a period of staying with a selected modulation mode. | |
930 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
931 | * Set frame tx success limits according to legacy vs. high-throughput, | |
932 | * and reset overall (spanning all rates) tx success history statistics. | |
933 | * These control how long we stay using same modulation mode before | |
934 | * searching for a new mode. | |
935 | */ | |
bf403db8 | 936 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 937 | struct iwl_lq_sta *lq_sta) |
b481de9c | 938 | { |
e1623446 | 939 | IWL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
c33104f0 | 940 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 941 | if (is_legacy) { |
c33104f0 TW |
942 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
943 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
944 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 945 | } else { |
c33104f0 TW |
946 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
947 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
948 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 949 | } |
c33104f0 TW |
950 | lq_sta->table_count = 0; |
951 | lq_sta->total_failed = 0; | |
952 | lq_sta->total_success = 0; | |
447fee70 | 953 | lq_sta->flush_timer = jiffies; |
d6e93399 | 954 | lq_sta->action_counter = 0; |
b481de9c ZY |
955 | } |
956 | ||
77626355 BC |
957 | /* |
958 | * Find correct throughput table for given mode of modulation | |
959 | */ | |
e227ceac TW |
960 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
961 | struct iwl_scale_tbl_info *tbl) | |
b481de9c | 962 | { |
e3949d62 DH |
963 | /* Used to choose among HT tables */ |
964 | s32 (*ht_tbl_pointer)[IWL_RATE_COUNT]; | |
965 | ||
966 | /* Check for invalid LQ type */ | |
967 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
968 | tbl->expected_tpt = expected_tpt_legacy; | |
969 | return; | |
970 | } | |
971 | ||
972 | /* Legacy rates have only one table */ | |
b481de9c | 973 | if (is_legacy(tbl->lq_type)) { |
e3949d62 DH |
974 | tbl->expected_tpt = expected_tpt_legacy; |
975 | return; | |
976 | } | |
977 | ||
978 | /* Choose among many HT tables depending on number of streams | |
979 | * (SISO/MIMO2/MIMO3), channel width (20/40), SGI, and aggregation | |
980 | * status */ | |
981 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
982 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
983 | else if (is_siso(tbl->lq_type)) | |
984 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
985 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
986 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
987 | else if (is_mimo2(tbl->lq_type)) | |
988 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
989 | else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
990 | ht_tbl_pointer = expected_tpt_mimo3_20MHz; | |
991 | else /* if (is_mimo3(tbl->lq_type)) <-- must be true */ | |
992 | ht_tbl_pointer = expected_tpt_mimo3_40MHz; | |
993 | ||
994 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ | |
995 | tbl->expected_tpt = ht_tbl_pointer[0]; | |
996 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
997 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
998 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
999 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
1000 | else /* AGG+SGI */ | |
1001 | tbl->expected_tpt = ht_tbl_pointer[3]; | |
b481de9c ZY |
1002 | } |
1003 | ||
77626355 BC |
1004 | /* |
1005 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1006 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1007 | * above the current measured throughput of "active" mode, to give new mode | |
1008 | * a fair chance to prove itself without too many challenges. | |
1009 | * | |
1010 | * This gets called when transitioning to more aggressive modulation | |
1011 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1012 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1013 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1014 | * bit rate will typically need to increase, but not if performance was bad. | |
1015 | */ | |
c79dd5b5 | 1016 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1017 | struct iwl_lq_sta *lq_sta, |
1018 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1019 | u16 rate_mask, s8 index) |
b481de9c | 1020 | { |
77626355 | 1021 | /* "active" values */ |
e227ceac | 1022 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1023 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1024 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1025 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1026 | |
1027 | /* expected "search" throughput */ | |
1028 | s32 *tpt_tbl = tbl->expected_tpt; | |
1029 | ||
1030 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1031 | u16 high_low; |
f935a6da | 1032 | s8 rate = index; |
b481de9c ZY |
1033 | |
1034 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1035 | ||
1036 | for (; ;) { | |
bf403db8 EK |
1037 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1038 | tbl->lq_type); | |
b481de9c ZY |
1039 | |
1040 | low = high_low & 0xff; | |
1041 | high = (high_low >> 8) & 0xff; | |
1042 | ||
77626355 BC |
1043 | /* |
1044 | * Lower the "search" bit rate, to give new "search" mode | |
1045 | * approximately the same throughput as "active" if: | |
1046 | * | |
1047 | * 1) "Active" mode has been working modestly well (but not | |
1048 | * great), and expected "search" throughput (under perfect | |
1049 | * conditions) at candidate rate is above the actual | |
1050 | * measured "active" throughput (but less than expected | |
1051 | * "active" throughput under perfect conditions). | |
1052 | * OR | |
1053 | * 2) "Active" mode has been working perfectly or very well | |
1054 | * and expected "search" throughput (under perfect | |
1055 | * conditions) at candidate rate is above expected | |
1056 | * "active" throughput (under perfect conditions). | |
1057 | */ | |
c33104f0 | 1058 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1059 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1060 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1061 | (tpt_tbl[rate] <= active_tpt))) || | |
1062 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1063 | (tpt_tbl[rate] > active_tpt))) { | |
1064 | ||
77626355 BC |
1065 | /* (2nd or later pass) |
1066 | * If we've already tried to raise the rate, and are | |
1067 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1068 | if (start_hi != IWL_RATE_INVALID) { |
1069 | new_rate = start_hi; | |
1070 | break; | |
1071 | } | |
77626355 | 1072 | |
b481de9c | 1073 | new_rate = rate; |
77626355 BC |
1074 | |
1075 | /* Loop again with lower rate */ | |
b481de9c ZY |
1076 | if (low != IWL_RATE_INVALID) |
1077 | rate = low; | |
77626355 BC |
1078 | |
1079 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1080 | else |
1081 | break; | |
77626355 BC |
1082 | |
1083 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1084 | } else { |
77626355 BC |
1085 | /* (2nd or later pass) |
1086 | * If we've already tried to lower the rate, and are | |
1087 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1088 | if (new_rate != IWL_RATE_INVALID) |
1089 | break; | |
77626355 BC |
1090 | |
1091 | /* Loop again with higher rate */ | |
b481de9c ZY |
1092 | else if (high != IWL_RATE_INVALID) { |
1093 | start_hi = high; | |
1094 | rate = high; | |
77626355 BC |
1095 | |
1096 | /* Higher rate not available, use the original */ | |
b481de9c | 1097 | } else { |
90d7795e | 1098 | new_rate = rate; |
b481de9c ZY |
1099 | break; |
1100 | } | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | return new_rate; | |
1105 | } | |
b481de9c | 1106 | |
77626355 | 1107 | /* |
584a0f00 | 1108 | * Set up search table for MIMO2 |
77626355 | 1109 | */ |
fde0db31 | 1110 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1111 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1112 | struct ieee80211_conf *conf, |
4b7679a5 | 1113 | struct ieee80211_sta *sta, |
e227ceac | 1114 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1115 | { |
b481de9c ZY |
1116 | u16 rate_mask; |
1117 | s32 rate; | |
c33104f0 | 1118 | s8 is_green = lq_sta->is_green; |
b481de9c | 1119 | |
de27e64e | 1120 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1121 | return -1; |
1122 | ||
d9fe60de | 1123 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1124 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1125 | return -1; |
1126 | ||
77626355 | 1127 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1128 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1129 | return -1; |
1130 | ||
e1623446 | 1131 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1132 | |
1133 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1134 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1135 | tbl->action = 0; |
d6e93399 | 1136 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 GC |
1137 | rate_mask = lq_sta->active_mimo2_rate; |
1138 | ||
7aafef1c WYG |
1139 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1140 | tbl->is_ht40 = 1; | |
b481de9c | 1141 | else |
7aafef1c | 1142 | tbl->is_ht40 = 0; |
b481de9c | 1143 | |
eecd6e57 | 1144 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1145 | |
f935a6da | 1146 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1147 | |
e1623446 | 1148 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
584a0f00 WYG |
1149 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
1150 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", | |
1151 | rate, rate_mask); | |
1152 | return -1; | |
1153 | } | |
1154 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); | |
1155 | ||
1156 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", | |
1157 | tbl->current_rate, is_green); | |
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | * Set up search table for MIMO3 | |
1163 | */ | |
1164 | static int rs_switch_to_mimo3(struct iwl_priv *priv, | |
1165 | struct iwl_lq_sta *lq_sta, | |
1166 | struct ieee80211_conf *conf, | |
1167 | struct ieee80211_sta *sta, | |
1168 | struct iwl_scale_tbl_info *tbl, int index) | |
1169 | { | |
1170 | u16 rate_mask; | |
1171 | s32 rate; | |
1172 | s8 is_green = lq_sta->is_green; | |
1173 | ||
1174 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1175 | return -1; | |
1176 | ||
1177 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) | |
1178 | == WLAN_HT_CAP_SM_PS_STATIC) | |
1179 | return -1; | |
1180 | ||
1181 | /* Need both Tx chains/antennas to support MIMO */ | |
1182 | if (priv->hw_params.tx_chains_num < 3) | |
1183 | return -1; | |
1184 | ||
1185 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); | |
1186 | ||
1187 | tbl->lq_type = LQ_MIMO3; | |
1188 | tbl->is_dup = lq_sta->is_dup; | |
1189 | tbl->action = 0; | |
d6e93399 | 1190 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; |
584a0f00 WYG |
1191 | rate_mask = lq_sta->active_mimo3_rate; |
1192 | ||
7aafef1c WYG |
1193 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1194 | tbl->is_ht40 = 1; | |
584a0f00 | 1195 | else |
7aafef1c | 1196 | tbl->is_ht40 = 0; |
39e88504 | 1197 | |
584a0f00 WYG |
1198 | rs_set_expected_tpt_table(lq_sta, tbl); |
1199 | ||
1200 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); | |
1201 | ||
1202 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n", | |
1203 | rate, rate_mask); | |
39e88504 | 1204 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1205 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
39e88504 | 1206 | rate, rate_mask); |
b481de9c | 1207 | return -1; |
39e88504 | 1208 | } |
978785a3 | 1209 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
b481de9c | 1210 | |
e1623446 | 1211 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1212 | tbl->current_rate, is_green); |
dc2453ae | 1213 | return 0; |
fde0db31 | 1214 | } |
b481de9c | 1215 | |
77626355 BC |
1216 | /* |
1217 | * Set up search table for SISO | |
1218 | */ | |
c79dd5b5 | 1219 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1220 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1221 | struct ieee80211_conf *conf, |
4b7679a5 | 1222 | struct ieee80211_sta *sta, |
e227ceac | 1223 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1224 | { |
b481de9c | 1225 | u16 rate_mask; |
c33104f0 | 1226 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1227 | s32 rate; |
1228 | ||
de27e64e | 1229 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1230 | return -1; |
1231 | ||
e1623446 | 1232 | IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n"); |
39e88504 | 1233 | |
c33104f0 | 1234 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1235 | tbl->lq_type = LQ_SISO; |
1236 | tbl->action = 0; | |
d6e93399 | 1237 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 | 1238 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1239 | |
7aafef1c WYG |
1240 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1241 | tbl->is_ht40 = 1; | |
b481de9c | 1242 | else |
7aafef1c | 1243 | tbl->is_ht40 = 0; |
b481de9c | 1244 | |
b481de9c | 1245 | if (is_green) |
39e88504 | 1246 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1247 | |
eecd6e57 | 1248 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1249 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1250 | |
e1623446 | 1251 | IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1252 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1253 | IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1254 | rate, rate_mask); |
1255 | return -1; | |
1256 | } | |
978785a3 | 1257 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
e1623446 | 1258 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1259 | tbl->current_rate, is_green); |
403ab56b | 1260 | return 0; |
b481de9c ZY |
1261 | } |
1262 | ||
77626355 BC |
1263 | /* |
1264 | * Try to switch to new modulation mode from legacy | |
1265 | */ | |
c79dd5b5 | 1266 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1267 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1268 | struct ieee80211_conf *conf, |
4b7679a5 | 1269 | struct ieee80211_sta *sta, |
b481de9c ZY |
1270 | int index) |
1271 | { | |
e227ceac TW |
1272 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1273 | struct iwl_scale_tbl_info *search_tbl = | |
1274 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1275 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1276 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1277 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1278 | u8 start_action = tbl->action; |
fde0db31 | 1279 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1280 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1281 | int ret = 0; |
d6e93399 | 1282 | u8 update_search_tbl_counter = 0; |
b481de9c | 1283 | |
46f9381a WYG |
1284 | if (!iwl_ht_enabled(priv)) |
1285 | /* stay in Legacy */ | |
1286 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
3ad3b92a | 1287 | else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1288 | tbl->action > IWL_LEGACY_SWITCH_SISO) |
1289 | tbl->action = IWL_LEGACY_SWITCH_SISO; | |
b481de9c | 1290 | for (; ;) { |
d6e93399 | 1291 | lq_sta->action_counter++; |
b481de9c | 1292 | switch (tbl->action) { |
3110bef7 GC |
1293 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1294 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
e1623446 | 1295 | IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
b481de9c | 1296 | |
3110bef7 GC |
1297 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1298 | tx_chains_num <= 1) || | |
1299 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1300 | tx_chains_num <= 2)) | |
1301 | break; | |
1302 | ||
77626355 | 1303 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1304 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1305 | break; | |
77626355 | 1306 | |
77626355 | 1307 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1308 | memcpy(search_tbl, tbl, sz); |
1309 | ||
aade00ce GC |
1310 | if (rs_toggle_antenna(valid_tx_ant, |
1311 | &search_tbl->current_rate, search_tbl)) { | |
d6e93399 | 1312 | update_search_tbl_counter = 1; |
3110bef7 | 1313 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1314 | goto out; |
1315 | } | |
a5e8b505 | 1316 | break; |
b481de9c | 1317 | case IWL_LEGACY_SWITCH_SISO: |
e1623446 | 1318 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
77626355 BC |
1319 | |
1320 | /* Set up search table to try SISO */ | |
b481de9c | 1321 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1322 | search_tbl->is_SGI = 0; |
c33104f0 | 1323 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1324 | search_tbl, index); |
dc2453ae | 1325 | if (!ret) { |
c33104f0 | 1326 | lq_sta->action_counter = 0; |
b481de9c | 1327 | goto out; |
dc2453ae | 1328 | } |
b481de9c ZY |
1329 | |
1330 | break; | |
3110bef7 GC |
1331 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1332 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1333 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
e1623446 | 1334 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1335 | |
1336 | /* Set up search table to try MIMO */ | |
b481de9c | 1337 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1338 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1339 | |
1340 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1341 | search_tbl->ant_type = ANT_AB; | |
1342 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1343 | search_tbl->ant_type = ANT_AC; | |
1344 | else | |
1345 | search_tbl->ant_type = ANT_BC; | |
1346 | ||
1347 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1348 | break; | |
1349 | ||
fde0db31 | 1350 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1351 | search_tbl, index); |
dc2453ae | 1352 | if (!ret) { |
c33104f0 | 1353 | lq_sta->action_counter = 0; |
b481de9c | 1354 | goto out; |
dc2453ae | 1355 | } |
b481de9c | 1356 | break; |
584a0f00 WYG |
1357 | |
1358 | case IWL_LEGACY_SWITCH_MIMO3_ABC: | |
1359 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); | |
1360 | ||
1361 | /* Set up search table to try MIMO3 */ | |
1362 | memcpy(search_tbl, tbl, sz); | |
1363 | search_tbl->is_SGI = 0; | |
1364 | ||
1365 | search_tbl->ant_type = ANT_ABC; | |
1366 | ||
1367 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1368 | break; | |
1369 | ||
1370 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1371 | search_tbl, index); | |
1372 | if (!ret) { | |
1373 | lq_sta->action_counter = 0; | |
1374 | goto out; | |
1375 | } | |
1376 | break; | |
b481de9c ZY |
1377 | } |
1378 | tbl->action++; | |
584a0f00 | 1379 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1380 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
b481de9c ZY |
1381 | |
1382 | if (tbl->action == start_action) | |
1383 | break; | |
1384 | ||
1385 | } | |
3110bef7 | 1386 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1387 | return 0; |
1388 | ||
3110bef7 GC |
1389 | out: |
1390 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1391 | tbl->action++; |
584a0f00 | 1392 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1393 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
d6e93399 MA |
1394 | if (update_search_tbl_counter) |
1395 | search_tbl->action = tbl->action; | |
b481de9c ZY |
1396 | return 0; |
1397 | ||
1398 | } | |
1399 | ||
77626355 BC |
1400 | /* |
1401 | * Try to switch to new modulation mode from SISO | |
1402 | */ | |
c79dd5b5 | 1403 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1404 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1405 | struct ieee80211_conf *conf, |
4b7679a5 | 1406 | struct ieee80211_sta *sta, int index) |
b481de9c | 1407 | { |
c33104f0 | 1408 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1409 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1410 | struct iwl_scale_tbl_info *search_tbl = | |
1411 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1412 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1413 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1414 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1415 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1416 | u8 start_action = tbl->action; |
fde0db31 | 1417 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1418 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
d6e93399 | 1419 | u8 update_search_tbl_counter = 0; |
fde0db31 | 1420 | int ret; |
b481de9c | 1421 | |
3ad3b92a | 1422 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1423 | tbl->action > IWL_SISO_SWITCH_ANTENNA2) { |
1424 | /* stay in SISO */ | |
1425 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; | |
1426 | } | |
b481de9c | 1427 | for (;;) { |
c33104f0 | 1428 | lq_sta->action_counter++; |
b481de9c | 1429 | switch (tbl->action) { |
3110bef7 GC |
1430 | case IWL_SISO_SWITCH_ANTENNA1: |
1431 | case IWL_SISO_SWITCH_ANTENNA2: | |
e1623446 | 1432 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1433 | |
1434 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1435 | tx_chains_num <= 1) || | |
1436 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1437 | tx_chains_num <= 2)) | |
1438 | break; | |
1439 | ||
b481de9c ZY |
1440 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1441 | break; | |
b481de9c ZY |
1442 | |
1443 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1444 | if (rs_toggle_antenna(valid_tx_ant, |
d6e93399 MA |
1445 | &search_tbl->current_rate, search_tbl)) { |
1446 | update_search_tbl_counter = 1; | |
aade00ce | 1447 | goto out; |
d6e93399 | 1448 | } |
a5e8b505 | 1449 | break; |
3110bef7 GC |
1450 | case IWL_SISO_SWITCH_MIMO2_AB: |
1451 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1452 | case IWL_SISO_SWITCH_MIMO2_BC: | |
e1623446 | 1453 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
b481de9c | 1454 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1455 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1456 | |
1457 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1458 | search_tbl->ant_type = ANT_AB; | |
1459 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1460 | search_tbl->ant_type = ANT_AC; | |
1461 | else | |
1462 | search_tbl->ant_type = ANT_BC; | |
1463 | ||
1464 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1465 | break; | |
1466 | ||
fde0db31 | 1467 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1468 | search_tbl, index); |
3110bef7 | 1469 | if (!ret) |
b481de9c ZY |
1470 | goto out; |
1471 | break; | |
1472 | case IWL_SISO_SWITCH_GI: | |
28e6f489 DH |
1473 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1474 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1475 | break; |
28e6f489 DH |
1476 | if (tbl->is_ht40 && !(ht_cap->cap & |
1477 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1478 | break; |
1479 | ||
e1623446 | 1480 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1481 | |
b481de9c | 1482 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1483 | if (is_green) { |
1484 | if (!tbl->is_SGI) | |
1485 | break; | |
1486 | else | |
15b1687c WT |
1487 | IWL_ERR(priv, |
1488 | "SGI was set in GF+SISO\n"); | |
b481de9c | 1489 | } |
39e88504 | 1490 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1491 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1492 | if (tbl->is_SGI) { |
1493 | s32 tpt = lq_sta->last_tpt / 100; | |
1494 | if (tpt >= search_tbl->expected_tpt[index]) | |
1495 | break; | |
1496 | } | |
978785a3 TW |
1497 | search_tbl->current_rate = |
1498 | rate_n_flags_from_tbl(priv, search_tbl, | |
1499 | index, is_green); | |
d6e93399 | 1500 | update_search_tbl_counter = 1; |
b481de9c | 1501 | goto out; |
584a0f00 WYG |
1502 | case IWL_SISO_SWITCH_MIMO3_ABC: |
1503 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); | |
1504 | memcpy(search_tbl, tbl, sz); | |
1505 | search_tbl->is_SGI = 0; | |
1506 | search_tbl->ant_type = ANT_ABC; | |
1507 | ||
1508 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1509 | break; | |
1510 | ||
1511 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1512 | search_tbl, index); | |
1513 | if (!ret) | |
1514 | goto out; | |
1515 | break; | |
b481de9c ZY |
1516 | } |
1517 | tbl->action++; | |
584a0f00 | 1518 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1519 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1520 | |
1521 | if (tbl->action == start_action) | |
1522 | break; | |
1523 | } | |
3110bef7 | 1524 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1525 | return 0; |
1526 | ||
1527 | out: | |
3110bef7 | 1528 | lq_sta->search_better_tbl = 1; |
b481de9c | 1529 | tbl->action++; |
584a0f00 | 1530 | if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC) |
3110bef7 | 1531 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
d6e93399 MA |
1532 | if (update_search_tbl_counter) |
1533 | search_tbl->action = tbl->action; | |
1534 | ||
b481de9c ZY |
1535 | return 0; |
1536 | } | |
1537 | ||
77626355 | 1538 | /* |
584a0f00 | 1539 | * Try to switch to new modulation mode from MIMO2 |
77626355 | 1540 | */ |
584a0f00 | 1541 | static int rs_move_mimo2_to_other(struct iwl_priv *priv, |
e227ceac | 1542 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1543 | struct ieee80211_conf *conf, |
4b7679a5 | 1544 | struct ieee80211_sta *sta, int index) |
b481de9c | 1545 | { |
c33104f0 | 1546 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1547 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1548 | struct iwl_scale_tbl_info *search_tbl = | |
1549 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1550 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
28e6f489 | 1551 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1552 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1553 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1554 | u8 start_action = tbl->action; |
3110bef7 GC |
1555 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1556 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
d6e93399 | 1557 | u8 update_search_tbl_counter = 0; |
aade00ce | 1558 | int ret; |
b481de9c | 1559 | |
3ad3b92a | 1560 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1561 | (tbl->action < IWL_MIMO2_SWITCH_SISO_A || |
1562 | tbl->action > IWL_MIMO2_SWITCH_SISO_C)) { | |
1563 | /* switch in SISO */ | |
1564 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1565 | } | |
b481de9c | 1566 | for (;;) { |
c33104f0 | 1567 | lq_sta->action_counter++; |
b481de9c | 1568 | switch (tbl->action) { |
3110bef7 GC |
1569 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1570 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
584a0f00 | 1571 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); |
3110bef7 GC |
1572 | |
1573 | if (tx_chains_num <= 2) | |
1574 | break; | |
1575 | ||
1576 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1577 | break; | |
1578 | ||
1579 | memcpy(search_tbl, tbl, sz); | |
1580 | if (rs_toggle_antenna(valid_tx_ant, | |
d6e93399 MA |
1581 | &search_tbl->current_rate, search_tbl)) { |
1582 | update_search_tbl_counter = 1; | |
3110bef7 | 1583 | goto out; |
d6e93399 | 1584 | } |
3110bef7 GC |
1585 | break; |
1586 | case IWL_MIMO2_SWITCH_SISO_A: | |
1587 | case IWL_MIMO2_SWITCH_SISO_B: | |
1588 | case IWL_MIMO2_SWITCH_SISO_C: | |
e1623446 | 1589 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1590 | |
77626355 | 1591 | /* Set up new search table for SISO */ |
b481de9c | 1592 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1593 | |
3110bef7 | 1594 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1595 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1596 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1597 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1598 | else |
1599 | search_tbl->ant_type = ANT_C; | |
1600 | ||
1601 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1602 | break; | |
b481de9c | 1603 | |
c33104f0 | 1604 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1605 | search_tbl, index); |
3110bef7 | 1606 | if (!ret) |
b481de9c | 1607 | goto out; |
3110bef7 | 1608 | |
b481de9c ZY |
1609 | break; |
1610 | ||
3110bef7 | 1611 | case IWL_MIMO2_SWITCH_GI: |
28e6f489 DH |
1612 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1613 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1614 | break; |
28e6f489 DH |
1615 | if (tbl->is_ht40 && !(ht_cap->cap & |
1616 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1617 | break; |
1618 | ||
584a0f00 | 1619 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); |
77626355 | 1620 | |
584a0f00 | 1621 | /* Set up new search table for MIMO2 */ |
b481de9c | 1622 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1623 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1624 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1625 | /* |
1626 | * If active table already uses the fastest possible | |
1627 | * modulation (dual stream with short guard interval), | |
1628 | * and it's working well, there's no need to look | |
1629 | * for a better type of modulation! | |
1630 | */ | |
39e88504 | 1631 | if (tbl->is_SGI) { |
c33104f0 | 1632 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1633 | if (tpt >= search_tbl->expected_tpt[index]) |
1634 | break; | |
b481de9c | 1635 | } |
978785a3 TW |
1636 | search_tbl->current_rate = |
1637 | rate_n_flags_from_tbl(priv, search_tbl, | |
1638 | index, is_green); | |
d6e93399 | 1639 | update_search_tbl_counter = 1; |
b481de9c ZY |
1640 | goto out; |
1641 | ||
584a0f00 WYG |
1642 | case IWL_MIMO2_SWITCH_MIMO3_ABC: |
1643 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); | |
1644 | memcpy(search_tbl, tbl, sz); | |
1645 | search_tbl->is_SGI = 0; | |
1646 | search_tbl->ant_type = ANT_ABC; | |
1647 | ||
1648 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1649 | break; | |
1650 | ||
1651 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1652 | search_tbl, index); | |
1653 | if (!ret) | |
1654 | goto out; | |
1655 | ||
1656 | break; | |
b481de9c ZY |
1657 | } |
1658 | tbl->action++; | |
584a0f00 | 1659 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1660 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
b481de9c ZY |
1661 | |
1662 | if (tbl->action == start_action) | |
1663 | break; | |
1664 | } | |
3110bef7 | 1665 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1666 | return 0; |
1667 | out: | |
3110bef7 | 1668 | lq_sta->search_better_tbl = 1; |
b481de9c | 1669 | tbl->action++; |
584a0f00 | 1670 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1671 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
d6e93399 MA |
1672 | if (update_search_tbl_counter) |
1673 | search_tbl->action = tbl->action; | |
1674 | ||
b481de9c ZY |
1675 | return 0; |
1676 | ||
1677 | } | |
1678 | ||
584a0f00 WYG |
1679 | /* |
1680 | * Try to switch to new modulation mode from MIMO3 | |
1681 | */ | |
1682 | static int rs_move_mimo3_to_other(struct iwl_priv *priv, | |
1683 | struct iwl_lq_sta *lq_sta, | |
1684 | struct ieee80211_conf *conf, | |
1685 | struct ieee80211_sta *sta, int index) | |
1686 | { | |
1687 | s8 is_green = lq_sta->is_green; | |
1688 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1689 | struct iwl_scale_tbl_info *search_tbl = | |
1690 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1691 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1692 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
584a0f00 WYG |
1693 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1694 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1695 | u8 start_action = tbl->action; | |
1696 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; | |
1697 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
1698 | int ret; | |
d6e93399 | 1699 | u8 update_search_tbl_counter = 0; |
584a0f00 | 1700 | |
3ad3b92a | 1701 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1702 | (tbl->action < IWL_MIMO3_SWITCH_SISO_A || |
1703 | tbl->action > IWL_MIMO3_SWITCH_SISO_C)) { | |
1704 | /* switch in SISO */ | |
1705 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; | |
1706 | } | |
584a0f00 WYG |
1707 | for (;;) { |
1708 | lq_sta->action_counter++; | |
1709 | switch (tbl->action) { | |
1710 | case IWL_MIMO3_SWITCH_ANTENNA1: | |
1711 | case IWL_MIMO3_SWITCH_ANTENNA2: | |
1712 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); | |
1713 | ||
1714 | if (tx_chains_num <= 3) | |
1715 | break; | |
1716 | ||
1717 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1718 | break; | |
1719 | ||
1720 | memcpy(search_tbl, tbl, sz); | |
1721 | if (rs_toggle_antenna(valid_tx_ant, | |
1722 | &search_tbl->current_rate, search_tbl)) | |
1723 | goto out; | |
1724 | break; | |
1725 | case IWL_MIMO3_SWITCH_SISO_A: | |
1726 | case IWL_MIMO3_SWITCH_SISO_B: | |
1727 | case IWL_MIMO3_SWITCH_SISO_C: | |
1728 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); | |
1729 | ||
1730 | /* Set up new search table for SISO */ | |
1731 | memcpy(search_tbl, tbl, sz); | |
1732 | ||
1733 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) | |
1734 | search_tbl->ant_type = ANT_A; | |
1735 | else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) | |
1736 | search_tbl->ant_type = ANT_B; | |
1737 | else | |
1738 | search_tbl->ant_type = ANT_C; | |
1739 | ||
1740 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1741 | break; | |
1742 | ||
1743 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, | |
1744 | search_tbl, index); | |
1745 | if (!ret) | |
1746 | goto out; | |
1747 | ||
1748 | break; | |
1749 | ||
1750 | case IWL_MIMO3_SWITCH_MIMO2_AB: | |
1751 | case IWL_MIMO3_SWITCH_MIMO2_AC: | |
1752 | case IWL_MIMO3_SWITCH_MIMO2_BC: | |
1753 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); | |
1754 | ||
1755 | memcpy(search_tbl, tbl, sz); | |
1756 | search_tbl->is_SGI = 0; | |
1757 | if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) | |
1758 | search_tbl->ant_type = ANT_AB; | |
1759 | else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) | |
1760 | search_tbl->ant_type = ANT_AC; | |
1761 | else | |
1762 | search_tbl->ant_type = ANT_BC; | |
1763 | ||
1764 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1765 | break; | |
1766 | ||
1767 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
1768 | search_tbl, index); | |
1769 | if (!ret) | |
1770 | goto out; | |
1771 | ||
1772 | break; | |
1773 | ||
1774 | case IWL_MIMO3_SWITCH_GI: | |
28e6f489 DH |
1775 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1776 | IEEE80211_HT_CAP_SGI_20)) | |
584a0f00 | 1777 | break; |
28e6f489 DH |
1778 | if (tbl->is_ht40 && !(ht_cap->cap & |
1779 | IEEE80211_HT_CAP_SGI_40)) | |
584a0f00 WYG |
1780 | break; |
1781 | ||
1782 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); | |
1783 | ||
1784 | /* Set up new search table for MIMO */ | |
1785 | memcpy(search_tbl, tbl, sz); | |
1786 | search_tbl->is_SGI = !tbl->is_SGI; | |
1787 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1788 | /* | |
1789 | * If active table already uses the fastest possible | |
1790 | * modulation (dual stream with short guard interval), | |
1791 | * and it's working well, there's no need to look | |
1792 | * for a better type of modulation! | |
1793 | */ | |
1794 | if (tbl->is_SGI) { | |
1795 | s32 tpt = lq_sta->last_tpt / 100; | |
1796 | if (tpt >= search_tbl->expected_tpt[index]) | |
1797 | break; | |
1798 | } | |
1799 | search_tbl->current_rate = | |
1800 | rate_n_flags_from_tbl(priv, search_tbl, | |
1801 | index, is_green); | |
d6e93399 | 1802 | update_search_tbl_counter = 1; |
584a0f00 WYG |
1803 | goto out; |
1804 | } | |
1805 | tbl->action++; | |
1806 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1807 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
1808 | ||
1809 | if (tbl->action == start_action) | |
1810 | break; | |
1811 | } | |
1812 | search_tbl->lq_type = LQ_NONE; | |
1813 | return 0; | |
1814 | out: | |
1815 | lq_sta->search_better_tbl = 1; | |
1816 | tbl->action++; | |
1817 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1818 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
d6e93399 MA |
1819 | if (update_search_tbl_counter) |
1820 | search_tbl->action = tbl->action; | |
1821 | ||
584a0f00 WYG |
1822 | return 0; |
1823 | ||
1824 | } | |
1825 | ||
77626355 BC |
1826 | /* |
1827 | * Check whether we should continue using same modulation mode, or | |
1828 | * begin search for a new mode, based on: | |
1829 | * 1) # tx successes or failures while using this mode | |
1830 | * 2) # times calling this function | |
1831 | * 3) elapsed time in this mode (not used, for now) | |
1832 | */ | |
e227ceac | 1833 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1834 | { |
e227ceac | 1835 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1836 | int i; |
1837 | int active_tbl; | |
1838 | int flush_interval_passed = 0; | |
bf403db8 | 1839 | struct iwl_priv *priv; |
b481de9c | 1840 | |
bf403db8 | 1841 | priv = lq_sta->drv; |
c33104f0 | 1842 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1843 | |
c33104f0 | 1844 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1845 | |
77626355 | 1846 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1847 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1848 | |
77626355 | 1849 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1850 | if (lq_sta->flush_timer) |
b481de9c | 1851 | flush_interval_passed = |
447fee70 MA |
1852 | time_after(jiffies, |
1853 | (unsigned long)(lq_sta->flush_timer + | |
b481de9c ZY |
1854 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1855 | ||
77626355 BC |
1856 | /* |
1857 | * Check if we should allow search for new modulation mode. | |
1858 | * If many frames have failed or succeeded, or we've used | |
1859 | * this same modulation for a long time, allow search, and | |
1860 | * reset history stats that keep track of whether we should | |
1861 | * allow a new search. Also (below) reset all bitmaps and | |
1862 | * stats in active history. | |
1863 | */ | |
c33104f0 TW |
1864 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1865 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1866 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1867 | && (flush_interval_passed))) { |
e1623446 | 1868 | IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1869 | lq_sta->total_failed, |
1870 | lq_sta->total_success, | |
b481de9c | 1871 | flush_interval_passed); |
77626355 BC |
1872 | |
1873 | /* Allow search for new mode */ | |
c33104f0 TW |
1874 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1875 | lq_sta->total_failed = 0; | |
1876 | lq_sta->total_success = 0; | |
1877 | lq_sta->flush_timer = 0; | |
77626355 BC |
1878 | |
1879 | /* | |
1880 | * Else if we've used this modulation mode enough repetitions | |
1881 | * (regardless of elapsed time or success/failure), reset | |
1882 | * history bitmaps and rate-specific stats for all rates in | |
1883 | * active table. | |
1884 | */ | |
403ab56b | 1885 | } else { |
c33104f0 TW |
1886 | lq_sta->table_count++; |
1887 | if (lq_sta->table_count >= | |
1888 | lq_sta->table_count_limit) { | |
1889 | lq_sta->table_count = 0; | |
b481de9c | 1890 | |
e1623446 | 1891 | IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
b481de9c ZY |
1892 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1893 | rs_rate_scale_clear_window( | |
1894 | &(tbl->win[i])); | |
1895 | } | |
1896 | } | |
1897 | ||
77626355 BC |
1898 | /* If transitioning to allow "search", reset all history |
1899 | * bitmaps and stats in active table (this will become the new | |
1900 | * "search" table). */ | |
c33104f0 | 1901 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1902 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1903 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1904 | } | |
1905 | } | |
1906 | } | |
1907 | ||
e3139fe7 WYG |
1908 | /* |
1909 | * setup rate table in uCode | |
1910 | * return rate_n_flags as used in the table | |
1911 | */ | |
1912 | static u32 rs_update_rate_tbl(struct iwl_priv *priv, | |
1913 | struct iwl_lq_sta *lq_sta, | |
1914 | struct iwl_scale_tbl_info *tbl, | |
1915 | int index, u8 is_green) | |
1916 | { | |
1917 | u32 rate; | |
1918 | ||
1919 | /* Update uCode's rate table. */ | |
1920 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); | |
1921 | rs_fill_link_cmd(priv, lq_sta, rate); | |
1922 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
1923 | ||
1924 | return rate; | |
1925 | } | |
1926 | ||
77626355 BC |
1927 | /* |
1928 | * Do rate scaling and search for new modulation mode. | |
1929 | */ | |
c79dd5b5 | 1930 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 1931 | struct sk_buff *skb, |
4b7679a5 JB |
1932 | struct ieee80211_sta *sta, |
1933 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 1934 | { |
4b7679a5 | 1935 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 1936 | struct ieee80211_conf *conf = &hw->conf; |
514d65c1 GS |
1937 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1938 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
b481de9c ZY |
1939 | int low = IWL_RATE_INVALID; |
1940 | int high = IWL_RATE_INVALID; | |
1941 | int index; | |
1942 | int i; | |
e227ceac | 1943 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1944 | int current_tpt = IWL_INVALID_VALUE; |
1945 | int low_tpt = IWL_INVALID_VALUE; | |
1946 | int high_tpt = IWL_INVALID_VALUE; | |
1947 | u32 fail_count; | |
1948 | s8 scale_action = 0; | |
fd7c8a40 | 1949 | u16 rate_mask; |
b481de9c | 1950 | u8 update_lq = 0; |
e227ceac | 1951 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1952 | u16 rate_scale_index_msk = 0; |
39e88504 | 1953 | u32 rate; |
b481de9c ZY |
1954 | u8 is_green = 0; |
1955 | u8 active_tbl = 0; | |
1956 | u8 done_search = 0; | |
1957 | u16 high_low; | |
a5e8b505 | 1958 | s32 sr; |
0c11b4de | 1959 | u8 tid = MAX_TID_COUNT; |
86b4766b | 1960 | struct iwl_tid_data *tid_data; |
b481de9c | 1961 | |
e1623446 | 1962 | IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 1963 | |
514d65c1 | 1964 | /* Send management frames and NO_ACK data using lowest rate. */ |
417f114b TW |
1965 | /* TODO: this could probably be improved.. */ |
1966 | if (!ieee80211_is_data(hdr->frame_control) || | |
514d65c1 | 1967 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c | 1968 | return; |
b481de9c | 1969 | |
4b7679a5 | 1970 | if (!sta || !lq_sta) |
b481de9c ZY |
1971 | return; |
1972 | ||
4b7679a5 | 1973 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1974 | |
faa29718 | 1975 | tid = rs_tl_add_packet(lq_sta, hdr); |
e3949d62 DH |
1976 | if ((tid != MAX_TID_COUNT) && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
1977 | tid_data = &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
1978 | if (tid_data->agg.state == IWL_AGG_OFF) | |
1979 | lq_sta->is_agg = 0; | |
1980 | else | |
1981 | lq_sta->is_agg = 1; | |
1982 | } else | |
1983 | lq_sta->is_agg = 0; | |
faa29718 | 1984 | |
77626355 BC |
1985 | /* |
1986 | * Select rate-scale / modulation-mode table to work with in | |
1987 | * the rest of this function: "search" if searching for better | |
1988 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1989 | */ | |
c33104f0 TW |
1990 | if (!lq_sta->search_better_tbl) |
1991 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1992 | else |
c33104f0 | 1993 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1994 | |
c33104f0 | 1995 | tbl = &(lq_sta->lq_info[active_tbl]); |
2681b20b WYG |
1996 | if (is_legacy(tbl->lq_type)) |
1997 | lq_sta->is_green = 0; | |
1998 | else | |
b261793d | 1999 | lq_sta->is_green = rs_use_green(sta, &priv->current_ht_config); |
c33104f0 | 2000 | is_green = lq_sta->is_green; |
b481de9c | 2001 | |
77626355 | 2002 | /* current tx rate */ |
b7e35008 | 2003 | index = lq_sta->last_txrate_idx; |
b481de9c | 2004 | |
e1623446 | 2005 | IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
b481de9c ZY |
2006 | tbl->lq_type); |
2007 | ||
77626355 | 2008 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 2009 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c | 2010 | |
e1623446 | 2011 | IWL_DEBUG_RATE(priv, "mask 0x%04X \n", rate_mask); |
b481de9c ZY |
2012 | |
2013 | /* mask with station rate restriction */ | |
2014 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 2015 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 2016 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 2017 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 2018 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
2019 | else |
2020 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 2021 | lq_sta->supp_rates); |
b481de9c ZY |
2022 | |
2023 | } else | |
2024 | rate_scale_index_msk = rate_mask; | |
2025 | ||
2026 | if (!rate_scale_index_msk) | |
2027 | rate_scale_index_msk = rate_mask; | |
2028 | ||
07bc28ed | 2029 | if (!((1 << index) & rate_scale_index_msk)) { |
15b1687c | 2030 | IWL_ERR(priv, "Current Rate is not valid\n"); |
e3139fe7 WYG |
2031 | if (lq_sta->search_better_tbl) { |
2032 | /* revert to active table if search table is not valid*/ | |
2033 | tbl->lq_type = LQ_NONE; | |
2034 | lq_sta->search_better_tbl = 0; | |
2035 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2036 | /* get "active" rate info */ | |
2037 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); | |
2038 | rate = rs_update_rate_tbl(priv, lq_sta, | |
2039 | tbl, index, is_green); | |
2040 | } | |
07bc28ed | 2041 | return; |
b481de9c ZY |
2042 | } |
2043 | ||
77626355 | 2044 | /* Get expected throughput table and history window for current rate */ |
07bc28ed | 2045 | if (!tbl->expected_tpt) { |
15b1687c | 2046 | IWL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
07bc28ed GC |
2047 | return; |
2048 | } | |
b481de9c | 2049 | |
c6ec7a9b AM |
2050 | /* force user max rate if set by user */ |
2051 | if ((lq_sta->max_rate_idx != -1) && | |
2052 | (lq_sta->max_rate_idx < index)) { | |
2053 | index = lq_sta->max_rate_idx; | |
2054 | update_lq = 1; | |
2055 | window = &(tbl->win[index]); | |
2056 | goto lq_update; | |
2057 | } | |
2058 | ||
b481de9c ZY |
2059 | window = &(tbl->win[index]); |
2060 | ||
77626355 BC |
2061 | /* |
2062 | * If there is not enough history to calculate actual average | |
2063 | * throughput, keep analyzing results of more tx frames, without | |
2064 | * changing rate or mode (bypass most of the rest of this function). | |
2065 | * Set up new rate table in uCode only if old rate is not supported | |
2066 | * in current association (use new rate found above). | |
2067 | */ | |
b481de9c | 2068 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
2069 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
2070 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
e1623446 | 2071 | IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
b481de9c ZY |
2072 | "for index %d\n", |
2073 | window->success_counter, window->counter, index); | |
77626355 BC |
2074 | |
2075 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 2076 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
2077 | |
2078 | /* Should we stay with this modulation mode, | |
2079 | * or search for a new one? */ | |
c33104f0 | 2080 | rs_stay_in_table(lq_sta); |
77626355 | 2081 | |
b481de9c | 2082 | goto out; |
3110bef7 | 2083 | } |
77626355 BC |
2084 | /* Else we have enough samples; calculate estimate of |
2085 | * actual average throughput */ | |
3110bef7 | 2086 | |
e3949d62 | 2087 | /* Sanity-check TPT calculations */ |
3110bef7 GC |
2088 | BUG_ON(window->average_tpt != ((window->success_ratio * |
2089 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 2090 | |
77626355 | 2091 | /* If we are searching for better modulation mode, check success. */ |
46f9381a | 2092 | if (lq_sta->search_better_tbl && |
3ad3b92a | 2093 | (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) { |
77626355 BC |
2094 | /* If good success, continue using the "search" mode; |
2095 | * no need to send new link quality command, since we're | |
2096 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
2097 | if (window->average_tpt > lq_sta->last_tpt) { |
2098 | ||
e1623446 | 2099 | IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
2100 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2101 | window->success_ratio, | |
2102 | window->average_tpt, | |
2103 | lq_sta->last_tpt); | |
2104 | ||
2105 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 2106 | lq_sta->enable_counter = 1; |
07bc28ed | 2107 | |
77626355 | 2108 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 2109 | lq_sta->active_tbl = active_tbl; |
b481de9c | 2110 | current_tpt = window->average_tpt; |
77626355 BC |
2111 | |
2112 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 2113 | } else { |
07bc28ed | 2114 | |
e1623446 | 2115 | IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
07bc28ed GC |
2116 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2117 | window->success_ratio, | |
2118 | window->average_tpt, | |
2119 | lq_sta->last_tpt); | |
2120 | ||
77626355 | 2121 | /* Nullify "search" table */ |
b481de9c | 2122 | tbl->lq_type = LQ_NONE; |
77626355 BC |
2123 | |
2124 | /* Revert to "active" table */ | |
c33104f0 TW |
2125 | active_tbl = lq_sta->active_tbl; |
2126 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 2127 | |
77626355 | 2128 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 2129 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 2130 | current_tpt = lq_sta->last_tpt; |
b481de9c | 2131 | |
77626355 | 2132 | /* Need to set up a new rate table in uCode */ |
b481de9c | 2133 | update_lq = 1; |
b481de9c | 2134 | } |
77626355 BC |
2135 | |
2136 | /* Either way, we've made a decision; modulation mode | |
2137 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 2138 | lq_sta->search_better_tbl = 0; |
77626355 | 2139 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
2140 | goto lq_update; |
2141 | } | |
2142 | ||
77626355 BC |
2143 | /* (Else) not in search of better modulation mode, try for better |
2144 | * starting rate, while staying in this mode. */ | |
bf403db8 | 2145 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
2146 | tbl->lq_type); |
2147 | low = high_low & 0xff; | |
2148 | high = (high_low >> 8) & 0xff; | |
2149 | ||
c6ec7a9b AM |
2150 | /* If user set max rate, dont allow higher than user constrain */ |
2151 | if ((lq_sta->max_rate_idx != -1) && | |
2152 | (lq_sta->max_rate_idx < high)) | |
2153 | high = IWL_RATE_INVALID; | |
2154 | ||
a5e8b505 GC |
2155 | sr = window->success_ratio; |
2156 | ||
77626355 | 2157 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 2158 | current_tpt = window->average_tpt; |
b481de9c ZY |
2159 | if (low != IWL_RATE_INVALID) |
2160 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
2161 | if (high != IWL_RATE_INVALID) |
2162 | high_tpt = tbl->win[high].average_tpt; | |
2163 | ||
a5e8b505 | 2164 | scale_action = 0; |
b481de9c | 2165 | |
77626355 | 2166 | /* Too many failures, decrease rate */ |
a5e8b505 | 2167 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
e1623446 | 2168 | IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
b481de9c | 2169 | scale_action = -1; |
77626355 BC |
2170 | |
2171 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 2172 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
2173 | (high_tpt == IWL_INVALID_VALUE)) { |
2174 | ||
2175 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
2176 | scale_action = 1; | |
2177 | else if (low != IWL_RATE_INVALID) | |
8fe72311 | 2178 | scale_action = 0; |
a5e8b505 | 2179 | } |
77626355 BC |
2180 | |
2181 | /* Both adjacent throughputs are measured, but neither one has better | |
2182 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
2183 | else if ((low_tpt != IWL_INVALID_VALUE) && |
2184 | (high_tpt != IWL_INVALID_VALUE) && | |
2185 | (low_tpt < current_tpt) && | |
2186 | (high_tpt < current_tpt)) | |
2187 | scale_action = 0; | |
77626355 BC |
2188 | |
2189 | /* At least one adjacent rate's throughput is measured, | |
2190 | * and may have better performance. */ | |
b481de9c | 2191 | else { |
77626355 | 2192 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 2193 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 2194 | /* Higher rate has better throughput */ |
a5e8b505 GC |
2195 | if (high_tpt > current_tpt && |
2196 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 2197 | scale_action = 1; |
a5e8b505 | 2198 | } else { |
8fe72311 | 2199 | scale_action = 0; |
b481de9c | 2200 | } |
77626355 BC |
2201 | |
2202 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 2203 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 2204 | /* Lower rate has better throughput */ |
b481de9c | 2205 | if (low_tpt > current_tpt) { |
e1623446 TW |
2206 | IWL_DEBUG_RATE(priv, |
2207 | "decrease rate because of low tpt\n"); | |
b481de9c | 2208 | scale_action = -1; |
a5e8b505 | 2209 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 2210 | scale_action = 1; |
a5e8b505 | 2211 | } |
b481de9c ZY |
2212 | } |
2213 | } | |
2214 | ||
77626355 BC |
2215 | /* Sanity check; asked for decrease, but success rate or throughput |
2216 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
2217 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
2218 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 2219 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c | 2220 | scale_action = 0; |
46f9381a WYG |
2221 | if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type)) |
2222 | scale_action = -1; | |
3ad3b92a | 2223 | if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI && |
46f9381a WYG |
2224 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) |
2225 | scale_action = -1; | |
b481de9c ZY |
2226 | switch (scale_action) { |
2227 | case -1: | |
77626355 | 2228 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
2229 | if (low != IWL_RATE_INVALID) { |
2230 | update_lq = 1; | |
2231 | index = low; | |
2232 | } | |
447fee70 | 2233 | |
b481de9c ZY |
2234 | break; |
2235 | case 1: | |
77626355 | 2236 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
2237 | if (high != IWL_RATE_INVALID) { |
2238 | update_lq = 1; | |
2239 | index = high; | |
2240 | } | |
2241 | ||
2242 | break; | |
2243 | case 0: | |
77626355 | 2244 | /* No change */ |
b481de9c ZY |
2245 | default: |
2246 | break; | |
2247 | } | |
2248 | ||
e1623446 | 2249 | IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
b481de9c ZY |
2250 | "high %d type %d\n", |
2251 | index, scale_action, low, high, tbl->lq_type); | |
2252 | ||
a5e8b505 | 2253 | lq_update: |
77626355 | 2254 | /* Replace uCode's rate table for the destination station. */ |
e3139fe7 WYG |
2255 | if (update_lq) |
2256 | rate = rs_update_rate_tbl(priv, lq_sta, | |
2257 | tbl, index, is_green); | |
77626355 | 2258 | |
3ad3b92a | 2259 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) { |
46f9381a WYG |
2260 | /* Should we stay with this modulation mode, |
2261 | * or search for a new one? */ | |
2262 | rs_stay_in_table(lq_sta); | |
2263 | } | |
77626355 BC |
2264 | /* |
2265 | * Search for new modulation mode if we're: | |
2266 | * 1) Not changing rates right now | |
2267 | * 2) Not just finishing up a search | |
2268 | * 3) Allowing a new search | |
2269 | */ | |
47cfd463 | 2270 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 2271 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 2272 | lq_sta->last_tpt = current_tpt; |
b481de9c | 2273 | |
77626355 BC |
2274 | /* Select a new "search" modulation mode to try. |
2275 | * If one is found, set up the new "search" table. */ | |
b481de9c | 2276 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 2277 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2278 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 2279 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
584a0f00 WYG |
2280 | else if (is_mimo2(tbl->lq_type)) |
2281 | rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); | |
b481de9c | 2282 | else |
584a0f00 | 2283 | rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2284 | |
77626355 | 2285 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2286 | if (lq_sta->search_better_tbl) { |
77626355 | 2287 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2288 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2289 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2290 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2291 | ||
77626355 | 2292 | /* Use new "search" start rate */ |
e7d326ac | 2293 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2294 | |
e1623446 | 2295 | IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
39e88504 | 2296 | tbl->current_rate, index); |
07bc28ed | 2297 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 2298 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
447fee70 MA |
2299 | } else |
2300 | done_search = 1; | |
2301 | } | |
b481de9c | 2302 | |
447fee70 | 2303 | if (done_search && !lq_sta->stay_in_tbl) { |
77626355 BC |
2304 | /* If the "active" (non-search) mode was legacy, |
2305 | * and we've tried switching antennas, | |
2306 | * but we haven't been able to try HT modes (not available), | |
2307 | * stay with best antenna legacy modulation for a while | |
2308 | * before next round of mode comparisons. */ | |
c33104f0 | 2309 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
de27e64e | 2310 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && |
d6e93399 | 2311 | lq_sta->action_counter > tbl1->max_search) { |
e1623446 | 2312 | IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
bf403db8 | 2313 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2314 | } |
2315 | ||
77626355 BC |
2316 | /* If we're in an HT mode, and all 3 mode switch actions |
2317 | * have been tried and compared, stay in this best modulation | |
2318 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 | 2319 | if (lq_sta->enable_counter && |
46f9381a WYG |
2320 | (lq_sta->action_counter >= tbl1->max_search) && |
2321 | iwl_ht_enabled(priv)) { | |
0c11b4de RR |
2322 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2323 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2324 | (tid != MAX_TID_COUNT)) { | |
86b4766b WYG |
2325 | tid_data = |
2326 | &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
2327 | if (tid_data->agg.state == IWL_AGG_OFF) { | |
2328 | IWL_DEBUG_RATE(priv, | |
2329 | "try to aggregate tid %d\n", | |
2330 | tid); | |
2331 | rs_tl_turn_on_agg(priv, tid, | |
2332 | lq_sta, sta); | |
2333 | } | |
b481de9c | 2334 | } |
bf403db8 | 2335 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2336 | } |
b481de9c ZY |
2337 | } |
2338 | ||
2339 | out: | |
978785a3 | 2340 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
b481de9c | 2341 | i = index; |
b7e35008 | 2342 | lq_sta->last_txrate_idx = i; |
b481de9c | 2343 | |
b481de9c ZY |
2344 | return; |
2345 | } | |
2346 | ||
2347 | ||
c79dd5b5 | 2348 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2349 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2350 | struct ieee80211_sta *sta, |
2351 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2352 | { |
e227ceac | 2353 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2354 | int rate_idx; |
aade00ce | 2355 | int i; |
39e88504 | 2356 | u32 rate; |
b261793d | 2357 | u8 use_green = rs_use_green(sta, &priv->current_ht_config); |
aade00ce GC |
2358 | u8 active_tbl = 0; |
2359 | u8 valid_tx_ant; | |
b481de9c | 2360 | |
4b7679a5 | 2361 | if (!sta || !lq_sta) |
b481de9c ZY |
2362 | goto out; |
2363 | ||
b7e35008 | 2364 | i = lq_sta->last_txrate_idx; |
b481de9c | 2365 | |
c33104f0 | 2366 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2367 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2368 | goto out; |
2369 | ||
aade00ce GC |
2370 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2371 | ||
c33104f0 TW |
2372 | if (!lq_sta->search_better_tbl) |
2373 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2374 | else |
c33104f0 | 2375 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2376 | |
c33104f0 | 2377 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2378 | |
2379 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2380 | i = 0; | |
2381 | ||
1826dcc0 | 2382 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2383 | tbl->ant_type = first_antenna(valid_tx_ant); |
2384 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2385 | |
2386 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2387 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2388 | |
39e88504 | 2389 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2390 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2391 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2392 | |
978785a3 | 2393 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2394 | tbl->current_rate = rate; |
eecd6e57 | 2395 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2396 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2397 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2398 | out: |
2399 | return; | |
2400 | } | |
2401 | ||
e6a9854b JB |
2402 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2403 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2404 | { |
2405 | ||
e6a9854b JB |
2406 | struct sk_buff *skb = txrc->skb; |
2407 | struct ieee80211_supported_band *sband = txrc->sband; | |
4b7679a5 JB |
2408 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2409 | struct ieee80211_conf *conf = &priv->hw->conf; | |
7869b0ea | 2410 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
b481de9c | 2411 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e6a9854b | 2412 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2413 | struct iwl_lq_sta *lq_sta = priv_sta; |
2414 | int rate_idx; | |
b481de9c | 2415 | |
e1623446 | 2416 | IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2417 | |
c6ec7a9b AM |
2418 | /* Get max rate if user set max rate */ |
2419 | if (lq_sta) { | |
2420 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2421 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2422 | (lq_sta->max_rate_idx != -1)) | |
2423 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2424 | if ((lq_sta->max_rate_idx < 0) || | |
2425 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2426 | lq_sta->max_rate_idx = -1; | |
2427 | } | |
2428 | ||
514d65c1 | 2429 | /* Send management frames and NO_ACK data using lowest rate. */ |
4c6d4f5c | 2430 | if (rate_control_send_low(sta, priv_sta, txrc)) |
4b7679a5 | 2431 | return; |
b481de9c | 2432 | |
417f114b | 2433 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2434 | |
05c914fe | 2435 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2436 | !lq_sta->ibss_sta_added) { |
c587de0b | 2437 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
b481de9c ZY |
2438 | |
2439 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2440 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", |
e174961c | 2441 | hdr->addr1); |
c587de0b | 2442 | sta_id = iwl_add_station(priv, hdr->addr1, |
7869b0ea | 2443 | false, CMD_ASYNC, ht_cap); |
b481de9c ZY |
2444 | } |
2445 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2446 | lq_sta->lq.sta_id = sta_id; |
2447 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2448 | lq_sta->ibss_sta_added = 1; | |
4b7679a5 | 2449 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c | 2450 | } |
b481de9c ZY |
2451 | } |
2452 | ||
a9c146b3 | 2453 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { |
417f114b | 2454 | rate_idx -= IWL_FIRST_OFDM_RATE; |
a9c146b3 WYG |
2455 | /* 6M and 9M shared same MCS index */ |
2456 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; | |
2457 | if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2458 | IWL_RATE_MIMO3_6M_PLCP) | |
2459 | rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM); | |
2460 | else if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2461 | IWL_RATE_MIMO2_6M_PLCP) | |
2462 | rate_idx = rate_idx + MCS_INDEX_PER_STREAM; | |
2463 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; | |
2464 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2465 | info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI; | |
2466 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) | |
2467 | info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA; | |
7aafef1c | 2468 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
a9c146b3 WYG |
2469 | info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2470 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) | |
2471 | info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
2472 | } else { | |
5027309b DH |
2473 | /* Check for invalid rates */ |
2474 | if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) || | |
2475 | ((sband->band == IEEE80211_BAND_5GHZ) && | |
2476 | (rate_idx < IWL_FIRST_OFDM_RATE))) | |
a9c146b3 | 2477 | rate_idx = rate_lowest_index(sband, sta); |
5027309b | 2478 | /* On valid 5 GHz rate, adjust index */ |
a9c146b3 WYG |
2479 | else if (sband->band == IEEE80211_BAND_5GHZ) |
2480 | rate_idx -= IWL_FIRST_OFDM_RATE; | |
7ebaeff8 | 2481 | info->control.rates[0].flags = 0; |
a9c146b3 | 2482 | } |
417f114b | 2483 | info->control.rates[0].idx = rate_idx; |
a9c146b3 | 2484 | |
b481de9c ZY |
2485 | } |
2486 | ||
4b7679a5 JB |
2487 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2488 | gfp_t gfp) | |
b481de9c | 2489 | { |
e227ceac | 2490 | struct iwl_lq_sta *lq_sta; |
8d9698b3 | 2491 | struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv; |
bf403db8 | 2492 | struct iwl_priv *priv; |
b481de9c | 2493 | |
bf403db8 | 2494 | priv = (struct iwl_priv *)priv_rate; |
e1623446 | 2495 | IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
b481de9c | 2496 | |
8d9698b3 | 2497 | lq_sta = &sta_priv->lq_sta; |
b481de9c | 2498 | |
c33104f0 | 2499 | return lq_sta; |
b481de9c ZY |
2500 | } |
2501 | ||
4b7679a5 JB |
2502 | static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, |
2503 | struct ieee80211_sta *sta, void *priv_sta) | |
b481de9c ZY |
2504 | { |
2505 | int i, j; | |
4b7679a5 JB |
2506 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2507 | struct ieee80211_conf *conf = &priv->hw->conf; | |
7869b0ea | 2508 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac | 2509 | struct iwl_lq_sta *lq_sta = priv_sta; |
b481de9c | 2510 | |
5ad13f8c RC |
2511 | lq_sta->lq.sta_id = 0xff; |
2512 | ||
2513 | for (j = 0; j < LQ_SIZE; j++) | |
2514 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
2515 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); | |
2516 | ||
c33104f0 | 2517 | lq_sta->flush_timer = 0; |
4b7679a5 | 2518 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2519 | for (j = 0; j < LQ_SIZE; j++) |
2520 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2521 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2522 | |
e1623446 | 2523 | IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2524 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2525 | * the lowest or the highest rate.. Could consider using RSSI from | |
2526 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2527 | * after assoc.. */ | |
2528 | ||
c33104f0 | 2529 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2530 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
c587de0b | 2531 | u8 sta_id = iwl_find_station(priv, |
e11bc028 | 2532 | sta->addr); |
0795af57 | 2533 | |
b481de9c | 2534 | /* for IBSS the call are from tasklet */ |
e1623446 | 2535 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
b481de9c ZY |
2536 | |
2537 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2538 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
c587de0b | 2539 | sta_id = iwl_add_station(priv, sta->addr, false, |
7869b0ea | 2540 | CMD_ASYNC, ht_cap); |
b481de9c ZY |
2541 | } |
2542 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2543 | lq_sta->lq.sta_id = sta_id; |
2544 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2545 | } |
2546 | /* FIXME: this is w/a remove it later */ | |
2547 | priv->assoc_station_added = 1; | |
2548 | } | |
2549 | ||
c33104f0 | 2550 | lq_sta->is_dup = 0; |
c6ec7a9b | 2551 | lq_sta->max_rate_idx = -1; |
7d049e5a | 2552 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; |
b261793d | 2553 | lq_sta->is_green = rs_use_green(sta, &priv->current_ht_config); |
39e88504 | 2554 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2555 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2556 | lq_sta->band = priv->band; |
77626355 BC |
2557 | /* |
2558 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2559 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2560 | */ | |
7869b0ea DH |
2561 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; |
2562 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2563 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2564 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2565 | |
77626355 | 2566 | /* Same here */ |
7869b0ea DH |
2567 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; |
2568 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2569 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2570 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2571 | ||
7869b0ea DH |
2572 | lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1; |
2573 | lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2574 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2575 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2576 | ||
e1623446 | 2577 | IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2578 | lq_sta->active_siso_rate, |
fde0db31 GC |
2579 | lq_sta->active_mimo2_rate, |
2580 | lq_sta->active_mimo3_rate); | |
2581 | ||
a96a27f9 | 2582 | /* These values will be overridden later */ |
07bc28ed GC |
2583 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; |
2584 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2585 | ||
0c11b4de RR |
2586 | /* as default allow aggregation for all tids */ |
2587 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2588 | lq_sta->drv = priv; |
b481de9c | 2589 | |
5027309b DH |
2590 | /* Set last_txrate_idx to lowest rate */ |
2591 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2592 | if (sband->band == IEEE80211_BAND_5GHZ) | |
2593 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
e3949d62 | 2594 | lq_sta->is_agg = 0; |
d5e49036 | 2595 | |
4b7679a5 | 2596 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2597 | } |
2598 | ||
46f9381a | 2599 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 2600 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2601 | { |
e227ceac | 2602 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2603 | int index = 0; |
b481de9c | 2604 | int rate_idx; |
1b696de2 | 2605 | int repeat_rate = 0; |
aade00ce | 2606 | u8 ant_toggle_cnt = 0; |
b481de9c | 2607 | u8 use_ht_possible = 1; |
aade00ce | 2608 | u8 valid_tx_ant = 0; |
07bc28ed | 2609 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2610 | |
77626355 | 2611 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2612 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2613 | |
39e88504 | 2614 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2615 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2616 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2617 | &tbl_type, &rate_idx); |
2618 | ||
77626355 | 2619 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2620 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2621 | ant_toggle_cnt = 1; |
1b696de2 | 2622 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2623 | } else { |
1b696de2 | 2624 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2625 | } |
b481de9c ZY |
2626 | |
2627 | lq_cmd->general_params.mimo_delimiter = | |
2628 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2629 | |
2630 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2631 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2632 | |
07bc28ed GC |
2633 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2634 | lq_cmd->general_params.single_stream_ant_msk = | |
2635 | tbl_type.ant_type; | |
2636 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2637 | lq_cmd->general_params.dual_stream_ant_msk = | |
2638 | tbl_type.ant_type; | |
2639 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2640 | |
2641 | index++; | |
1b696de2 | 2642 | repeat_rate--; |
b481de9c | 2643 | |
aade00ce GC |
2644 | if (priv) |
2645 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2646 | ||
77626355 | 2647 | /* Fill rest of rate table */ |
b481de9c | 2648 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2649 | /* Repeat initial/next rate. |
2650 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2651 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2652 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2653 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2654 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2655 | ant_toggle_cnt++; | |
2656 | else if (priv && | |
2657 | rs_toggle_antenna(valid_tx_ant, | |
2658 | &new_rate, &tbl_type)) | |
2659 | ant_toggle_cnt = 1; | |
2660 | } | |
98d7e09a | 2661 | |
77626355 | 2662 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2663 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2664 | |
2665 | /* Fill next table entry */ | |
b481de9c | 2666 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2667 | cpu_to_le32(new_rate); |
1b696de2 | 2668 | repeat_rate--; |
b481de9c ZY |
2669 | index++; |
2670 | } | |
2671 | ||
39e88504 | 2672 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2673 | &rate_idx); |
2674 | ||
77626355 BC |
2675 | /* Indicate to uCode which entries might be MIMO. |
2676 | * If initial rate was MIMO, this will finally end up | |
2677 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2678 | if (is_mimo(tbl_type.lq_type)) |
2679 | lq_cmd->general_params.mimo_delimiter = index; | |
2680 | ||
77626355 | 2681 | /* Get next rate */ |
39e88504 GC |
2682 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2683 | use_ht_possible); | |
b481de9c | 2684 | |
77626355 | 2685 | /* How many times should we repeat the next rate? */ |
b481de9c | 2686 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2687 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2688 | ant_toggle_cnt++; | |
2689 | else if (priv && | |
2690 | rs_toggle_antenna(valid_tx_ant, | |
2691 | &new_rate, &tbl_type)) | |
2692 | ant_toggle_cnt = 1; | |
2693 | ||
1b696de2 | 2694 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2695 | } else { |
1b696de2 | 2696 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2697 | } |
b481de9c | 2698 | |
77626355 BC |
2699 | /* Don't allow HT rates after next pass. |
2700 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2701 | use_ht_possible = 0; |
2702 | ||
77626355 | 2703 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2704 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2705 | |
2706 | /* Fill next table entry */ | |
39e88504 | 2707 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2708 | |
2709 | index++; | |
1b696de2 | 2710 | repeat_rate--; |
b481de9c ZY |
2711 | } |
2712 | ||
4d80d721 | 2713 | lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; |
13c33a09 WYG |
2714 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; |
2715 | lq_cmd->agg_params.agg_time_limit = | |
2716 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
b481de9c ZY |
2717 | } |
2718 | ||
4b7679a5 | 2719 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2720 | { |
4b7679a5 | 2721 | return hw->priv; |
b481de9c ZY |
2722 | } |
2723 | /* rate scale requires free function to be implemented */ | |
2724 | static void rs_free(void *priv_rate) | |
2725 | { | |
2726 | return; | |
2727 | } | |
2728 | ||
4b7679a5 JB |
2729 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2730 | void *priv_sta) | |
b481de9c | 2731 | { |
45527c2c | 2732 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c | 2733 | |
e1623446 | 2734 | IWL_DEBUG_RATE(priv, "enter\n"); |
e1623446 | 2735 | IWL_DEBUG_RATE(priv, "leave\n"); |
b481de9c ZY |
2736 | } |
2737 | ||
2738 | ||
93dc646a | 2739 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2740 | static int open_file_generic(struct inode *inode, struct file *file) |
2741 | { | |
2742 | file->private_data = inode->i_private; | |
2743 | return 0; | |
2744 | } | |
e227ceac TW |
2745 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2746 | u32 *rate_n_flags, int index) | |
98d7e09a | 2747 | { |
bf403db8 | 2748 | struct iwl_priv *priv; |
3c4955f8 WYG |
2749 | u8 valid_tx_ant; |
2750 | u8 ant_sel_tx; | |
bf403db8 EK |
2751 | |
2752 | priv = lq_sta->drv; | |
3c4955f8 | 2753 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
39e88504 | 2754 | if (lq_sta->dbg_fixed_rate) { |
3c4955f8 WYG |
2755 | ant_sel_tx = |
2756 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
2757 | >> RATE_MCS_ANT_POS); | |
2758 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
39e88504 | 2759 | *rate_n_flags = lq_sta->dbg_fixed_rate; |
3c4955f8 | 2760 | IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
39e88504 | 2761 | } else { |
3c4955f8 WYG |
2762 | lq_sta->dbg_fixed_rate = 0; |
2763 | IWL_ERR(priv, | |
2764 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
2765 | ant_sel_tx, valid_tx_ant); | |
2766 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); | |
39e88504 | 2767 | } |
39e88504 | 2768 | } else { |
e1623446 | 2769 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
98d7e09a | 2770 | } |
98d7e09a | 2771 | } |
5ae212c9 | 2772 | |
98d7e09a ZY |
2773 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2774 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2775 | { | |
e227ceac | 2776 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2777 | struct iwl_priv *priv; |
98d7e09a ZY |
2778 | char buf[64]; |
2779 | int buf_size; | |
2780 | u32 parsed_rate; | |
2781 | ||
bf403db8 | 2782 | priv = lq_sta->drv; |
98d7e09a ZY |
2783 | memset(buf, 0, sizeof(buf)); |
2784 | buf_size = min(count, sizeof(buf) - 1); | |
2785 | if (copy_from_user(buf, user_buf, buf_size)) | |
2786 | return -EFAULT; | |
2787 | ||
2788 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2789 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2790 | else |
39e88504 | 2791 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2792 | |
39e88504 GC |
2793 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2794 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2795 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2796 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a | 2797 | |
e1623446 | 2798 | IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
39e88504 | 2799 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2800 | |
39e88504 | 2801 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2802 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2803 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2804 | } |
2805 | ||
2806 | return count; | |
2807 | } | |
0209dc11 | 2808 | |
5ae212c9 ZY |
2809 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2810 | char __user *user_buf, size_t count, loff_t *ppos) | |
2811 | { | |
a412c804 | 2812 | char *buff; |
5ae212c9 ZY |
2813 | int desc = 0; |
2814 | int i = 0; | |
12b96817 | 2815 | int index = 0; |
a412c804 | 2816 | ssize_t ret; |
5ae212c9 | 2817 | |
e227ceac | 2818 | struct iwl_lq_sta *lq_sta = file->private_data; |
d8ae4f52 | 2819 | struct iwl_priv *priv; |
adb7b5e6 | 2820 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
5ae212c9 | 2821 | |
d8ae4f52 | 2822 | priv = lq_sta->drv; |
a412c804 FS |
2823 | buff = kmalloc(1024, GFP_KERNEL); |
2824 | if (!buff) | |
2825 | return -ENOMEM; | |
2826 | ||
c33104f0 | 2827 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2828 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2829 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2830 | lq_sta->active_legacy_rate); |
98d7e09a | 2831 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2832 | lq_sta->dbg_fixed_rate); |
d8ae4f52 WYG |
2833 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
2834 | (priv->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", | |
2835 | (priv->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2836 | (priv->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
adb7b5e6 WYG |
2837 | desc += sprintf(buff+desc, "lq type %s\n", |
2838 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
2839 | if (is_Ht(tbl->lq_type)) { | |
2840 | desc += sprintf(buff+desc, " %s", | |
2841 | (is_siso(tbl->lq_type)) ? "SISO" : | |
2842 | ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); | |
2843 | desc += sprintf(buff+desc, " %s", | |
7aafef1c | 2844 | (tbl->is_ht40) ? "40MHz" : "20MHz"); |
e3949d62 DH |
2845 | desc += sprintf(buff+desc, " %s %s %s\n", (tbl->is_SGI) ? "SGI" : "", |
2846 | (lq_sta->is_green) ? "GF enabled" : "", | |
2847 | (lq_sta->is_agg) ? "AGG on" : ""); | |
adb7b5e6 | 2848 | } |
12b96817 WYG |
2849 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", |
2850 | lq_sta->last_rate_n_flags); | |
5ae212c9 ZY |
2851 | desc += sprintf(buff+desc, "general:" |
2852 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2853 | lq_sta->lq.general_params.flags, |
2854 | lq_sta->lq.general_params.mimo_delimiter, | |
2855 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2856 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2857 | |
2858 | desc += sprintf(buff+desc, "agg:" | |
2859 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2860 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2861 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2862 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2863 | |
2864 | desc += sprintf(buff+desc, | |
2865 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2866 | lq_sta->lq.general_params.start_rate_index[0], |
2867 | lq_sta->lq.general_params.start_rate_index[1], | |
2868 | lq_sta->lq.general_params.start_rate_index[2], | |
2869 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 | 2870 | |
12b96817 WYG |
2871 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
2872 | index = iwl_hwrate_to_plcp_idx( | |
2873 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); | |
2874 | if (is_legacy(tbl->lq_type)) { | |
2875 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
2876 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2877 | iwl_rate_mcs[index].mbps); | |
2878 | } else { | |
2879 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", | |
2880 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2881 | iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); | |
2882 | } | |
2883 | } | |
5ae212c9 | 2884 | |
a412c804 FS |
2885 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2886 | kfree(buff); | |
2887 | return ret; | |
5ae212c9 ZY |
2888 | } |
2889 | ||
2890 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2891 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2892 | .read = rs_sta_dbgfs_scale_table_read, |
2893 | .open = open_file_generic, | |
2894 | }; | |
0209dc11 ZY |
2895 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2896 | char __user *user_buf, size_t count, loff_t *ppos) | |
2897 | { | |
a412c804 | 2898 | char *buff; |
0209dc11 ZY |
2899 | int desc = 0; |
2900 | int i, j; | |
a412c804 | 2901 | ssize_t ret; |
0209dc11 | 2902 | |
e227ceac | 2903 | struct iwl_lq_sta *lq_sta = file->private_data; |
a412c804 FS |
2904 | |
2905 | buff = kmalloc(1024, GFP_KERNEL); | |
2906 | if (!buff) | |
2907 | return -ENOMEM; | |
2908 | ||
0209dc11 | 2909 | for (i = 0; i < LQ_SIZE; i++) { |
7aafef1c WYG |
2910 | desc += sprintf(buff+desc, |
2911 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
0209dc11 | 2912 | "rate=0x%X\n", |
c3056065 | 2913 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
2914 | lq_sta->lq_info[i].lq_type, |
2915 | lq_sta->lq_info[i].is_SGI, | |
7aafef1c | 2916 | lq_sta->lq_info[i].is_ht40, |
c33104f0 | 2917 | lq_sta->lq_info[i].is_dup, |
2681b20b | 2918 | lq_sta->is_green, |
39e88504 | 2919 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2920 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2921 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2922 | "counter=%d success=%d %%=%d\n", |
2923 | lq_sta->lq_info[i].win[j].counter, | |
2924 | lq_sta->lq_info[i].win[j].success_counter, | |
2925 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2926 | } |
2927 | } | |
a412c804 FS |
2928 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2929 | kfree(buff); | |
2930 | return ret; | |
0209dc11 ZY |
2931 | } |
2932 | ||
2933 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2934 | .read = rs_sta_dbgfs_stats_table_read, | |
2935 | .open = open_file_generic, | |
2936 | }; | |
5ae212c9 | 2937 | |
38167459 WYG |
2938 | static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
2939 | char __user *user_buf, size_t count, loff_t *ppos) | |
2940 | { | |
2941 | char buff[120]; | |
2942 | int desc = 0; | |
2943 | ssize_t ret; | |
2944 | ||
2945 | struct iwl_lq_sta *lq_sta = file->private_data; | |
2946 | struct iwl_priv *priv; | |
2947 | struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; | |
2948 | ||
2949 | priv = lq_sta->drv; | |
2950 | ||
2951 | if (is_Ht(tbl->lq_type)) | |
2952 | desc += sprintf(buff+desc, | |
2953 | "Bit Rate= %d Mb/s\n", | |
2954 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
2955 | else | |
2956 | desc += sprintf(buff+desc, | |
2957 | "Bit Rate= %d Mb/s\n", | |
2958 | iwl_rates[lq_sta->last_txrate_idx].ieee >> 1); | |
2959 | desc += sprintf(buff+desc, | |
2960 | "Signal Level= %d dBm\tNoise Level= %d dBm\n", | |
2961 | priv->last_rx_rssi, priv->last_rx_noise); | |
2962 | desc += sprintf(buff+desc, | |
2963 | "Tsf= 0x%llx\tBeacon time= 0x%08X\n", | |
2964 | priv->last_tsf, priv->last_beacon_time); | |
2965 | ||
2966 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2967 | return ret; | |
2968 | } | |
2969 | ||
2970 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
2971 | .read = rs_sta_dbgfs_rate_scale_data_read, | |
2972 | .open = open_file_generic, | |
2973 | }; | |
2974 | ||
93dc646a ZY |
2975 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2976 | struct dentry *dir) | |
2977 | { | |
e227ceac | 2978 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2979 | lq_sta->rs_sta_dbgfs_scale_table_file = |
43e85115 | 2980 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
c33104f0 TW |
2981 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2982 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
43e85115 | 2983 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, |
c33104f0 | 2984 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
38167459 | 2985 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = |
43e85115 | 2986 | debugfs_create_file("rate_scale_data", S_IRUSR, dir, |
38167459 | 2987 | lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); |
0c11b4de | 2988 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
43e85115 | 2989 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, |
0c11b4de | 2990 | &lq_sta->tx_agg_tid_en); |
0c11b4de | 2991 | |
93dc646a ZY |
2992 | } |
2993 | ||
2994 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2995 | { | |
e227ceac | 2996 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2997 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2998 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
38167459 | 2999 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); |
0c11b4de | 3000 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
3001 | } |
3002 | #endif | |
3003 | ||
b481de9c ZY |
3004 | static struct rate_control_ops rs_ops = { |
3005 | .module = NULL, | |
3006 | .name = RS_NAME, | |
3007 | .tx_status = rs_tx_status, | |
3008 | .get_rate = rs_get_rate, | |
3009 | .rate_init = rs_rate_init, | |
b481de9c ZY |
3010 | .alloc = rs_alloc, |
3011 | .free = rs_free, | |
3012 | .alloc_sta = rs_alloc_sta, | |
3013 | .free_sta = rs_free_sta, | |
93dc646a ZY |
3014 | #ifdef CONFIG_MAC80211_DEBUGFS |
3015 | .add_sta_debugfs = rs_add_debugfs, | |
3016 | .remove_sta_debugfs = rs_remove_debugfs, | |
3017 | #endif | |
b481de9c ZY |
3018 | }; |
3019 | ||
e227ceac | 3020 | int iwlagn_rate_control_register(void) |
b481de9c | 3021 | { |
897e1cf2 | 3022 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
3023 | } |
3024 | ||
e227ceac | 3025 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
3026 | { |
3027 | ieee80211_rate_control_unregister(&rs_ops); | |
3028 | } | |
3029 |