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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> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
b481de9c ZY |
30 | #include <linux/wireless.h> |
31 | #include <net/mac80211.h> | |
b481de9c ZY |
32 | |
33 | #include <linux/netdevice.h> | |
34 | #include <linux/etherdevice.h> | |
35 | #include <linux/delay.h> | |
36 | ||
37 | #include <linux/workqueue.h> | |
38 | ||
3e0d4cb1 | 39 | #include "iwl-dev.h" |
be1f3ab6 | 40 | #include "iwl-sta.h" |
857485c0 | 41 | #include "iwl-core.h" |
b481de9c | 42 | |
e227ceac | 43 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 44 | |
aade00ce | 45 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
46 | #define IWL_NUMBER_TRY 1 |
47 | #define IWL_HT_NUMBER_TRY 3 | |
48 | ||
77626355 BC |
49 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
50 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
51 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
52 | ||
7d049e5a AM |
53 | /* max allowed rate miss before sync LQ cmd */ |
54 | #define IWL_MISSED_RATE_MAX 15 | |
77626355 | 55 | /* max time to accum history 2 seconds */ |
447fee70 | 56 | #define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ) |
b481de9c ZY |
57 | |
58 | static u8 rs_ht_to_legacy[] = { | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, | |
62 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
63 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
64 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
65 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
66 | }; | |
67 | ||
aade00ce GC |
68 | static const u8 ant_toggle_lookup[] = { |
69 | /*ANT_NONE -> */ ANT_NONE, | |
70 | /*ANT_A -> */ ANT_B, | |
71 | /*ANT_B -> */ ANT_C, | |
72 | /*ANT_AB -> */ ANT_BC, | |
73 | /*ANT_C -> */ ANT_A, | |
74 | /*ANT_AC -> */ ANT_AB, | |
75 | /*ANT_BC -> */ ANT_AC, | |
76 | /*ANT_ABC -> */ ANT_ABC, | |
77 | }; | |
78 | ||
c79dd5b5 | 79 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 80 | struct sk_buff *skb, |
4b7679a5 JB |
81 | struct ieee80211_sta *sta, |
82 | struct iwl_lq_sta *lq_sta); | |
46f9381a | 83 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 84 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
b481de9c ZY |
85 | |
86 | ||
98d7e09a | 87 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
88 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
89 | u32 *rate_n_flags, int index); | |
98d7e09a | 90 | #else |
e227ceac TW |
91 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
92 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
93 | {} |
94 | #endif | |
77626355 | 95 | |
e3949d62 DH |
96 | /** |
97 | * The following tables contain the expected throughput metrics for all rates | |
98 | * | |
99 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
100 | * | |
101 | * where invalid entries are zeros. | |
102 | * | |
103 | * CCK rates are only valid in legacy table and will only be used in G | |
104 | * (2.4 GHz) band. | |
77626355 | 105 | */ |
584a0f00 | 106 | |
e3949d62 DH |
107 | static s32 expected_tpt_legacy[IWL_RATE_COUNT] = { |
108 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 | |
b481de9c ZY |
109 | }; |
110 | ||
e3949d62 DH |
111 | static s32 expected_tpt_siso20MHz[4][IWL_RATE_COUNT] = { |
112 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 158, 183, 193, 202}, /* Norm */ | |
113 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 167, 192, 202, 210}, /* SGI */ | |
114 | {0, 0, 0, 0, 48, 0, 93, 135, 176, 251, 319, 351, 381}, /* AGG */ | |
115 | {0, 0, 0, 0, 53, 0, 102, 149, 193, 275, 348, 381, 413}, /* AGG+SGI */ | |
b481de9c ZY |
116 | }; |
117 | ||
e3949d62 DH |
118 | static s32 expected_tpt_siso40MHz[4][IWL_RATE_COUNT] = { |
119 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ | |
120 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ | |
121 | {0, 0, 0, 0, 96, 0, 182, 259, 328, 451, 553, 598, 640}, /* AGG */ | |
122 | {0, 0, 0, 0, 106, 0, 199, 282, 357, 487, 593, 640, 683}, /* AGG+SGI */ | |
b481de9c ZY |
123 | }; |
124 | ||
e3949d62 DH |
125 | static s32 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
126 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250}, /* Norm */ | |
127 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256}, /* SGI */ | |
128 | {0, 0, 0, 0, 92, 0, 175, 250, 317, 436, 534, 578, 619}, /* AGG */ | |
129 | {0, 0, 0, 0, 102, 0, 192, 273, 344, 470, 573, 619, 660}, /* AGG+SGI*/ | |
b481de9c ZY |
130 | }; |
131 | ||
e3949d62 DH |
132 | static s32 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
133 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ | |
134 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ | |
135 | {0, 0, 0, 0, 180, 0, 327, 446, 545, 708, 828, 878, 922}, /* AGG */ | |
136 | {0, 0, 0, 0, 197, 0, 355, 481, 584, 752, 872, 922, 966}, /* AGG+SGI */ | |
b481de9c ZY |
137 | }; |
138 | ||
e3949d62 DH |
139 | static s32 expected_tpt_mimo3_20MHz[4][IWL_RATE_COUNT] = { |
140 | {0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268}, /* Norm */ | |
141 | {0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273}, /* SGI */ | |
142 | {0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775}, /* AGG */ | |
143 | {0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818}, /* AGG+SGI */ | |
584a0f00 WYG |
144 | }; |
145 | ||
e3949d62 DH |
146 | static s32 expected_tpt_mimo3_40MHz[4][IWL_RATE_COUNT] = { |
147 | {0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297}, /* Norm */ | |
148 | {0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300}, /* SGI */ | |
149 | {0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070}, /* AGG */ | |
150 | {0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109}, /* AGG+SGI */ | |
584a0f00 WYG |
151 | }; |
152 | ||
12b96817 | 153 | /* mbps, mcs */ |
79496738 | 154 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { |
e3949d62 DH |
155 | { "1", "BPSK DSSS"}, |
156 | { "2", "QPSK DSSS"}, | |
157 | {"5.5", "BPSK CCK"}, | |
158 | { "11", "QPSK CCK"}, | |
159 | { "6", "BPSK 1/2"}, | |
160 | { "9", "BPSK 1/2"}, | |
161 | { "12", "QPSK 1/2"}, | |
162 | { "18", "QPSK 3/4"}, | |
163 | { "24", "16QAM 1/2"}, | |
164 | { "36", "16QAM 3/4"}, | |
165 | { "48", "64QAM 2/3"}, | |
166 | { "54", "64QAM 3/4"}, | |
167 | { "60", "64QAM 5/6"}, | |
12b96817 WYG |
168 | }; |
169 | ||
a9c146b3 WYG |
170 | #define MCS_INDEX_PER_STREAM (8) |
171 | ||
39e88504 | 172 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
173 | { |
174 | return (u8)(rate_n_flags & 0xFF); | |
175 | } | |
176 | ||
e227ceac | 177 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
178 | { |
179 | window->data = 0; | |
180 | window->success_counter = 0; | |
181 | window->success_ratio = IWL_INVALID_VALUE; | |
182 | window->counter = 0; | |
183 | window->average_tpt = IWL_INVALID_VALUE; | |
184 | window->stamp = 0; | |
b481de9c ZY |
185 | } |
186 | ||
aade00ce GC |
187 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
188 | { | |
3ac7f146 | 189 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
190 | } |
191 | ||
0c11b4de RR |
192 | /* |
193 | * removes the old data from the statistics. All data that is older than | |
194 | * TID_MAX_TIME_DIFF, will be deleted. | |
195 | */ | |
e227ceac | 196 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
197 | { |
198 | /* The oldest age we want to keep */ | |
199 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
200 | ||
201 | while (tl->queue_count && | |
202 | (tl->time_stamp < oldest_time)) { | |
203 | tl->total -= tl->packet_count[tl->head]; | |
204 | tl->packet_count[tl->head] = 0; | |
205 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
206 | tl->queue_count--; | |
207 | tl->head++; | |
208 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
209 | tl->head = 0; | |
210 | } | |
211 | } | |
212 | ||
213 | /* | |
214 | * increment traffic load value for tid and also remove | |
215 | * any old values if passed the certain time period | |
216 | */ | |
e227ceac | 217 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 218 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
219 | { |
220 | u32 curr_time = jiffies_to_msecs(jiffies); | |
221 | u32 time_diff; | |
222 | s32 index; | |
e227ceac | 223 | struct iwl_traffic_load *tl = NULL; |
54dbb525 | 224 | u8 tid; |
0c11b4de | 225 | |
417f114b | 226 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
fd7c8a40 | 227 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
54dbb525 TW |
228 | tid = qc[0] & 0xf; |
229 | } else | |
faa29718 | 230 | return MAX_TID_COUNT; |
0c11b4de | 231 | |
e6a6cf4c RC |
232 | if (unlikely(tid >= TID_MAX_LOAD_COUNT)) |
233 | return MAX_TID_COUNT; | |
234 | ||
0c11b4de RR |
235 | tl = &lq_data->load[tid]; |
236 | ||
237 | curr_time -= curr_time % TID_ROUND_VALUE; | |
238 | ||
239 | /* Happens only for the first packet. Initialize the data */ | |
240 | if (!(tl->queue_count)) { | |
241 | tl->total = 1; | |
242 | tl->time_stamp = curr_time; | |
243 | tl->queue_count = 1; | |
244 | tl->head = 0; | |
245 | tl->packet_count[0] = 1; | |
faa29718 | 246 | return MAX_TID_COUNT; |
0c11b4de RR |
247 | } |
248 | ||
249 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
250 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
251 | ||
252 | /* The history is too long: remove data that is older than */ | |
253 | /* TID_MAX_TIME_DIFF */ | |
254 | if (index >= TID_QUEUE_MAX_SIZE) | |
255 | rs_tl_rm_old_stats(tl, curr_time); | |
256 | ||
257 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
258 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
259 | tl->total = tl->total + 1; | |
260 | ||
261 | if ((index + 1) > tl->queue_count) | |
262 | tl->queue_count = index + 1; | |
faa29718 RR |
263 | |
264 | return tid; | |
0c11b4de RR |
265 | } |
266 | ||
267 | /* | |
268 | get the traffic load value for tid | |
269 | */ | |
e227ceac | 270 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
271 | { |
272 | u32 curr_time = jiffies_to_msecs(jiffies); | |
273 | u32 time_diff; | |
274 | s32 index; | |
e227ceac | 275 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
276 | |
277 | if (tid >= TID_MAX_LOAD_COUNT) | |
278 | return 0; | |
279 | ||
280 | tl = &(lq_data->load[tid]); | |
281 | ||
282 | curr_time -= curr_time % TID_ROUND_VALUE; | |
283 | ||
284 | if (!(tl->queue_count)) | |
285 | return 0; | |
286 | ||
287 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
288 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
289 | ||
290 | /* The history is too long: remove data that is older than */ | |
291 | /* TID_MAX_TIME_DIFF */ | |
292 | if (index >= TID_QUEUE_MAX_SIZE) | |
293 | rs_tl_rm_old_stats(tl, curr_time); | |
294 | ||
295 | return tl->total; | |
296 | } | |
297 | ||
c79dd5b5 | 298 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 299 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 300 | struct ieee80211_sta *sta) |
0c11b4de | 301 | { |
45d42700 WYG |
302 | int ret; |
303 | ||
ff550cb4 | 304 | if (rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { |
e1623446 | 305 | IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
e174961c | 306 | sta->addr, tid); |
45d42700 WYG |
307 | ret = ieee80211_start_tx_ba_session(sta, tid); |
308 | if (ret == -EAGAIN) { | |
309 | /* | |
310 | * driver and mac80211 is out of sync | |
311 | * this might be cause by reloading firmware | |
312 | * stop the tx ba session here | |
313 | */ | |
314 | IWL_DEBUG_HT(priv, "Fail start Tx agg on tid: %d\n", | |
315 | tid); | |
316 | ret = ieee80211_stop_tx_ba_session(sta, tid, | |
317 | WLAN_BACK_INITIATOR); | |
318 | } | |
0c11b4de RR |
319 | } |
320 | } | |
321 | ||
c79dd5b5 | 322 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 323 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 324 | struct ieee80211_sta *sta) |
0c11b4de RR |
325 | { |
326 | if ((tid < TID_MAX_LOAD_COUNT)) | |
327 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
328 | else if (tid == IWL_AGG_ALL_TID) | |
329 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
330 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
47eef9bd WYG |
331 | if (priv->cfg->use_rts_for_ht) { |
332 | /* | |
333 | * switch to RTS/CTS if it is the prefer protection method | |
334 | * for HT traffic | |
335 | */ | |
336 | IWL_DEBUG_HT(priv, "use RTS/CTS protection for HT\n"); | |
337 | priv->staging_rxon.flags &= ~RXON_FLG_SELF_CTS_EN; | |
338 | iwlcore_commit_rxon(priv); | |
339 | } | |
0c11b4de RR |
340 | } |
341 | ||
39e88504 | 342 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 343 | { |
3ac7f146 TW |
344 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
345 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
346 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
347 | } |
348 | ||
77626355 BC |
349 | /** |
350 | * rs_collect_tx_data - Update the success/failure sliding window | |
351 | * | |
352 | * We keep a sliding window of the last 62 packets transmitted | |
353 | * at this rate. window->data contains the bitmask of successful | |
354 | * packets. | |
355 | */ | |
e227ceac | 356 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
e3949d62 | 357 | int scale_index, s32 tpt, int attempts, |
99556438 | 358 | int successes) |
b481de9c | 359 | { |
e227ceac | 360 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 361 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
362 | s32 fail_count; |
363 | ||
dc2453ae TW |
364 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
365 | return -EINVAL; | |
b481de9c | 366 | |
e3949d62 | 367 | /* Select window for current tx bit rate */ |
b481de9c ZY |
368 | window = &(windows[scale_index]); |
369 | ||
77626355 BC |
370 | /* |
371 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
372 | * history window; anything older isn't really relevant any more. | |
373 | * If we have filled up the sliding window, drop the oldest attempt; | |
374 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
375 | * subtract "1" from the success counter (this is the main reason | |
376 | * we keep these bitmaps!). | |
377 | */ | |
e3949d62 | 378 | while (attempts > 0) { |
39e88504 GC |
379 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
380 | ||
381 | /* remove earliest */ | |
382 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
383 | ||
99556438 RR |
384 | if (window->data & mask) { |
385 | window->data &= ~mask; | |
39e88504 | 386 | window->success_counter--; |
99556438 | 387 | } |
b481de9c | 388 | } |
b481de9c | 389 | |
99556438 RR |
390 | /* Increment frames-attempted counter */ |
391 | window->counter++; | |
392 | ||
e3949d62 | 393 | /* Shift bitmap by one frame to throw away oldest history */ |
90d7795e | 394 | window->data <<= 1; |
e3949d62 DH |
395 | |
396 | /* Mark the most recent #successes attempts as successful */ | |
99556438 | 397 | if (successes > 0) { |
39e88504 | 398 | window->success_counter++; |
99556438 RR |
399 | window->data |= 0x1; |
400 | successes--; | |
401 | } | |
77626355 | 402 | |
e3949d62 | 403 | attempts--; |
b481de9c ZY |
404 | } |
405 | ||
77626355 | 406 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
407 | if (window->counter > 0) |
408 | window->success_ratio = 128 * (100 * window->success_counter) | |
409 | / window->counter; | |
410 | else | |
411 | window->success_ratio = IWL_INVALID_VALUE; | |
412 | ||
413 | fail_count = window->counter - window->success_counter; | |
414 | ||
77626355 | 415 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
416 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
417 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
418 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
419 | else | |
420 | window->average_tpt = IWL_INVALID_VALUE; | |
421 | ||
77626355 | 422 | /* Tag this window as having been updated */ |
b481de9c ZY |
423 | window->stamp = jiffies; |
424 | ||
dc2453ae | 425 | return 0; |
b481de9c ZY |
426 | } |
427 | ||
77626355 BC |
428 | /* |
429 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
430 | */ | |
39e88504 | 431 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
432 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
433 | struct iwl_scale_tbl_info *tbl, | |
434 | int index, u8 use_green) | |
b481de9c | 435 | { |
39e88504 GC |
436 | u32 rate_n_flags = 0; |
437 | ||
b481de9c | 438 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 439 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 440 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 441 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 442 | |
fde0db31 GC |
443 | } else if (is_Ht(tbl->lq_type)) { |
444 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 445 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 446 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 447 | } |
39e88504 | 448 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
449 | |
450 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 451 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 452 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 453 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 454 | else |
1826dcc0 | 455 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 456 | } else { |
978785a3 | 457 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
458 | } |
459 | ||
39e88504 | 460 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 461 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 462 | |
39e88504 | 463 | if (is_Ht(tbl->lq_type)) { |
7aafef1c | 464 | if (tbl->is_ht40) { |
39e88504 GC |
465 | if (tbl->is_dup) |
466 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
467 | else | |
7aafef1c | 468 | rate_n_flags |= RATE_MCS_HT40_MSK; |
39e88504 GC |
469 | } |
470 | if (tbl->is_SGI) | |
471 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
472 | ||
473 | if (use_green) { | |
474 | rate_n_flags |= RATE_MCS_GF_MSK; | |
475 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
476 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 477 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
478 | } |
479 | } | |
b481de9c | 480 | } |
39e88504 | 481 | return rate_n_flags; |
b481de9c ZY |
482 | } |
483 | ||
77626355 BC |
484 | /* |
485 | * Interpret uCode API's rate_n_flags format, | |
486 | * fill "search" or "active" tx mode table. | |
487 | */ | |
39e88504 | 488 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 489 | enum ieee80211_band band, |
e227ceac | 490 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
491 | int *rate_idx) |
492 | { | |
39e88504 GC |
493 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
494 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
495 | u8 mcs; | |
b481de9c | 496 | |
e7d326ac | 497 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 498 | |
fde0db31 | 499 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 500 | *rate_idx = -1; |
dc2453ae | 501 | return -EINVAL; |
b481de9c | 502 | } |
77626355 | 503 | tbl->is_SGI = 0; /* default legacy setup */ |
7aafef1c | 504 | tbl->is_ht40 = 0; |
b481de9c | 505 | tbl->is_dup = 0; |
fde0db31 GC |
506 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
507 | tbl->lq_type = LQ_NONE; | |
d6e93399 | 508 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c | 509 | |
77626355 | 510 | /* legacy rate format */ |
39e88504 | 511 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 512 | if (num_of_ant == 1) { |
8318d78a | 513 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
514 | tbl->lq_type = LQ_A; |
515 | else | |
516 | tbl->lq_type = LQ_G; | |
b481de9c | 517 | } |
fde0db31 | 518 | /* HT rate format */ |
b481de9c | 519 | } else { |
39e88504 | 520 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
521 | tbl->is_SGI = 1; |
522 | ||
7aafef1c | 523 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || |
39e88504 | 524 | (rate_n_flags & RATE_MCS_DUP_MSK)) |
7aafef1c | 525 | tbl->is_ht40 = 1; |
b481de9c | 526 | |
39e88504 | 527 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 528 | tbl->is_dup = 1; |
fde0db31 | 529 | |
39e88504 | 530 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 531 | |
39e88504 GC |
532 | /* SISO */ |
533 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
534 | if (num_of_ant == 1) |
535 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
536 | /* MIMO2 */ | |
39e88504 | 537 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
538 | if (num_of_ant == 2) |
539 | tbl->lq_type = LQ_MIMO2; | |
540 | /* MIMO3 */ | |
541 | } else { | |
d6e93399 MA |
542 | if (num_of_ant == 3) { |
543 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; | |
fde0db31 | 544 | tbl->lq_type = LQ_MIMO3; |
d6e93399 | 545 | } |
fde0db31 | 546 | } |
b481de9c ZY |
547 | } |
548 | return 0; | |
549 | } | |
aade00ce GC |
550 | |
551 | /* switch to another antenna/antennas and return 1 */ | |
552 | /* if no other valid antenna found, return 0 */ | |
553 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 554 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 555 | { |
aade00ce GC |
556 | u8 new_ant_type; |
557 | ||
558 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
559 | return 0; | |
560 | ||
561 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
562 | return 0; | |
563 | ||
564 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
565 | ||
566 | while ((new_ant_type != tbl->ant_type) && | |
567 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
568 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
569 | ||
570 | if (new_ant_type == tbl->ant_type) | |
571 | return 0; | |
572 | ||
573 | tbl->ant_type = new_ant_type; | |
574 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
575 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
576 | return 1; | |
b481de9c ZY |
577 | } |
578 | ||
b261793d DH |
579 | /** |
580 | * Green-field mode is valid if the station supports it and | |
581 | * there are no non-GF stations present in the BSS. | |
582 | */ | |
583 | static inline u8 rs_use_green(struct ieee80211_sta *sta, | |
fad95bf5 | 584 | struct iwl_ht_config *ht_conf) |
b481de9c | 585 | { |
b261793d DH |
586 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
587 | !(ht_conf->non_GF_STA_present); | |
b481de9c ZY |
588 | } |
589 | ||
590 | /** | |
591 | * rs_get_supported_rates - get the available rates | |
592 | * | |
593 | * if management frame or broadcast frame only return | |
594 | * basic available rates. | |
595 | * | |
596 | */ | |
e227ceac TW |
597 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
598 | struct ieee80211_hdr *hdr, | |
599 | enum iwl_table_type rate_type) | |
b481de9c | 600 | { |
eecd6e57 GC |
601 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
602 | lq_sta->active_rate_basic) | |
603 | return lq_sta->active_rate_basic; | |
604 | ||
605 | if (is_legacy(rate_type)) { | |
606 | return lq_sta->active_legacy_rate; | |
607 | } else { | |
b481de9c | 608 | if (is_siso(rate_type)) |
eecd6e57 | 609 | return lq_sta->active_siso_rate; |
fde0db31 | 610 | else if (is_mimo2(rate_type)) |
eecd6e57 | 611 | return lq_sta->active_mimo2_rate; |
b481de9c | 612 | else |
eecd6e57 | 613 | return lq_sta->active_mimo3_rate; |
c33104f0 | 614 | } |
b481de9c ZY |
615 | } |
616 | ||
bf403db8 EK |
617 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
618 | int rate_type) | |
b481de9c ZY |
619 | { |
620 | u8 high = IWL_RATE_INVALID; | |
621 | u8 low = IWL_RATE_INVALID; | |
622 | ||
01ebd063 | 623 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
624 | * the rate table */ |
625 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
626 | int i; | |
627 | u32 mask; | |
628 | ||
629 | /* Find the previous rate that is in the rate mask */ | |
630 | i = index - 1; | |
631 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
632 | if (rate_mask & mask) { | |
633 | low = i; | |
634 | break; | |
635 | } | |
636 | } | |
637 | ||
638 | /* Find the next rate that is in the rate mask */ | |
639 | i = index + 1; | |
640 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
641 | if (rate_mask & mask) { | |
642 | high = i; | |
643 | break; | |
644 | } | |
645 | } | |
646 | ||
647 | return (high << 8) | low; | |
648 | } | |
649 | ||
650 | low = index; | |
651 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 652 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
653 | if (low == IWL_RATE_INVALID) |
654 | break; | |
655 | if (rate_mask & (1 << low)) | |
656 | break; | |
e1623446 | 657 | IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
b481de9c ZY |
658 | } |
659 | ||
660 | high = index; | |
661 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 662 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
663 | if (high == IWL_RATE_INVALID) |
664 | break; | |
665 | if (rate_mask & (1 << high)) | |
666 | break; | |
e1623446 | 667 | IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
b481de9c ZY |
668 | } |
669 | ||
670 | return (high << 8) | low; | |
671 | } | |
672 | ||
e227ceac TW |
673 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
674 | struct iwl_scale_tbl_info *tbl, | |
675 | u8 scale_index, u8 ht_possible) | |
b481de9c | 676 | { |
b481de9c ZY |
677 | s32 low; |
678 | u16 rate_mask; | |
679 | u16 high_low; | |
680 | u8 switch_to_legacy = 0; | |
c33104f0 | 681 | u8 is_green = lq_sta->is_green; |
2ff6578b | 682 | struct iwl_priv *priv = lq_sta->drv; |
b481de9c ZY |
683 | |
684 | /* check if we need to switch from HT to legacy rates. | |
685 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
686 | * are always supported (spec demand) */ | |
687 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
688 | switch_to_legacy = 1; | |
689 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 690 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
691 | tbl->lq_type = LQ_A; |
692 | else | |
693 | tbl->lq_type = LQ_G; | |
694 | ||
69fdb309 | 695 | if (num_of_ant(tbl->ant_type) > 1) |
2ff6578b WYG |
696 | tbl->ant_type = |
697 | first_antenna(priv->hw_params.valid_tx_ant); | |
b481de9c | 698 | |
7aafef1c | 699 | tbl->is_ht40 = 0; |
b481de9c | 700 | tbl->is_SGI = 0; |
d6e93399 | 701 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c ZY |
702 | } |
703 | ||
eecd6e57 | 704 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 705 | |
77626355 | 706 | /* Mask with station rate restriction */ |
b481de9c | 707 | if (is_legacy(tbl->lq_type)) { |
77626355 | 708 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 709 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 710 | rate_mask = (u16)(rate_mask & |
c33104f0 | 711 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 712 | else |
c33104f0 | 713 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
714 | } |
715 | ||
77626355 | 716 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 717 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
718 | low = scale_index; |
719 | goto out; | |
b481de9c ZY |
720 | } |
721 | ||
bf403db8 EK |
722 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
723 | tbl->lq_type); | |
b481de9c ZY |
724 | low = high_low & 0xff; |
725 | ||
39e88504 GC |
726 | if (low == IWL_RATE_INVALID) |
727 | low = scale_index; | |
728 | ||
729 | out: | |
978785a3 | 730 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
731 | } |
732 | ||
95407aa4 DH |
733 | /* |
734 | * Simple function to compare two rate scale table types | |
735 | */ | |
736 | static bool table_type_matches(struct iwl_scale_tbl_info *a, | |
737 | struct iwl_scale_tbl_info *b) | |
738 | { | |
739 | return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) && | |
740 | (a->is_SGI == b->is_SGI); | |
741 | } | |
742 | /* | |
743 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
744 | * that wraps a NULL pointer check | |
745 | */ | |
746 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
747 | { | |
748 | if (tbl->expected_tpt) | |
749 | return tbl->expected_tpt[rs_index]; | |
750 | return 0; | |
751 | } | |
752 | ||
77626355 BC |
753 | /* |
754 | * mac80211 sends us Tx status | |
755 | */ | |
4b7679a5 JB |
756 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
757 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 758 | struct sk_buff *skb) |
b481de9c | 759 | { |
95407aa4 DH |
760 | int legacy_success; |
761 | int retries; | |
762 | int rs_index, mac_index, i; | |
417f114b | 763 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 764 | struct iwl_link_quality_cmd *table; |
b481de9c | 765 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 | 766 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
e039fa4a | 767 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac | 768 | struct iwl_rate_scale_data *window = NULL; |
5027309b | 769 | enum mac80211_rate_control_flags mac_flags; |
39e88504 | 770 | u32 tx_rate; |
e227ceac | 771 | struct iwl_scale_tbl_info tbl_type; |
95407aa4 | 772 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl; |
b481de9c ZY |
773 | s32 tpt = 0; |
774 | ||
e1623446 | 775 | IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
b481de9c | 776 | |
417f114b | 777 | if (!ieee80211_is_data(hdr->frame_control) || |
514d65c1 | 778 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c ZY |
779 | return; |
780 | ||
e3949d62 | 781 | /* This packet was aggregated but doesn't carry status info */ |
e039fa4a JB |
782 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
783 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
784 | return; |
785 | ||
05c914fe | 786 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 787 | !lq_sta->ibss_sta_added) |
95407aa4 | 788 | return; |
b481de9c | 789 | |
77626355 BC |
790 | /* |
791 | * Ignore this Tx frame response if its initial rate doesn't match | |
792 | * that of latest Link Quality command. There may be stragglers | |
793 | * from a previous Link Quality command, but we're no longer interested | |
794 | * in those; they're either from the "active" mode while we're trying | |
795 | * to check "search" mode, or a prior "search" mode after we've moved | |
796 | * to a new "search" mode (which might become the new "active" mode). | |
797 | */ | |
95407aa4 | 798 | table = &lq_sta->lq; |
39e88504 GC |
799 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
800 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
801 | if (priv->band == IEEE80211_BAND_5GHZ) |
802 | rs_index -= IWL_FIRST_OFDM_RATE; | |
5027309b DH |
803 | mac_flags = info->status.rates[0].flags; |
804 | mac_index = info->status.rates[0].idx; | |
31513be8 DH |
805 | /* For HT packets, map MCS to PLCP */ |
806 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
807 | mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ | |
808 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
809 | mac_index++; | |
392a0baf DH |
810 | /* |
811 | * mac80211 HT index is always zero-indexed; we need to move | |
812 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
813 | */ | |
814 | if (priv->band == IEEE80211_BAND_2GHZ) | |
815 | mac_index += IWL_FIRST_OFDM_RATE; | |
31513be8 | 816 | } |
95407aa4 | 817 | /* Here we actually compare this rate to the latest LQ command */ |
5027309b DH |
818 | if ((mac_index < 0) || |
819 | (tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || | |
820 | (tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
821 | (tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) || | |
e6a9854b | 822 | (tbl_type.ant_type != info->antenna_sel_tx) || |
5027309b DH |
823 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) || |
824 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
31513be8 DH |
825 | (rs_index != mac_index)) { |
826 | IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate); | |
95407aa4 DH |
827 | /* |
828 | * Since rates mis-match, the last LQ command may have failed. | |
829 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
830 | * ... driver. | |
d5e49036 | 831 | */ |
7d049e5a AM |
832 | lq_sta->missed_rate_counter++; |
833 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
834 | lq_sta->missed_rate_counter = 0; | |
835 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
836 | } | |
95407aa4 DH |
837 | /* Regardless, ignore this status info for outdated rate */ |
838 | return; | |
839 | } else | |
840 | /* Rate did match, so reset the missed_rate_counter */ | |
841 | lq_sta->missed_rate_counter = 0; | |
842 | ||
843 | /* Figure out if rate scale algorithm is in active or search table */ | |
844 | if (table_type_matches(&tbl_type, | |
845 | &(lq_sta->lq_info[lq_sta->active_tbl]))) { | |
846 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
847 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
848 | } else if (table_type_matches(&tbl_type, | |
849 | &lq_sta->lq_info[1 - lq_sta->active_tbl])) { | |
850 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
851 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
852 | } else { | |
853 | IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n"); | |
854 | return; | |
b481de9c | 855 | } |
95407aa4 | 856 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
b481de9c | 857 | |
95407aa4 DH |
858 | /* |
859 | * Updating the frame history depends on whether packets were | |
860 | * aggregated. | |
861 | * | |
862 | * For aggregation, all packets were transmitted at the same rate, the | |
863 | * first index into rate scale table. | |
864 | */ | |
865 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
866 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
867 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, | |
868 | &rs_index); | |
869 | tpt = get_expected_tpt(curr_tbl, rs_index); | |
870 | rs_collect_tx_data(window, rs_index, tpt, | |
871 | info->status.ampdu_ack_len, | |
872 | info->status.ampdu_ack_map); | |
873 | ||
874 | /* Update success/fail counts if not searching for new mode */ | |
875 | if (lq_sta->stay_in_tbl) { | |
876 | lq_sta->total_success += info->status.ampdu_ack_map; | |
877 | lq_sta->total_failed += (info->status.ampdu_ack_len - | |
878 | info->status.ampdu_ack_map); | |
b481de9c | 879 | } |
95407aa4 | 880 | } else { |
77626355 | 881 | /* |
95407aa4 | 882 | * For legacy, update frame history with for each Tx retry. |
77626355 | 883 | */ |
95407aa4 DH |
884 | retries = info->status.rates[0].count - 1; |
885 | /* HW doesn't send more than 15 retries */ | |
886 | retries = min(retries, 15); | |
887 | ||
888 | /* The last transmission may have been successful */ | |
889 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
890 | /* Collect data for each rate used during failed TX attempts */ | |
891 | for (i = 0; i <= retries; ++i) { | |
892 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
893 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
894 | &tbl_type, &rs_index); | |
895 | /* | |
896 | * Only collect stats if retried rate is in the same RS | |
897 | * table as active/search. | |
898 | */ | |
899 | if (table_type_matches(&tbl_type, curr_tbl)) | |
900 | tpt = get_expected_tpt(curr_tbl, rs_index); | |
901 | else if (table_type_matches(&tbl_type, other_tbl)) | |
902 | tpt = get_expected_tpt(other_tbl, rs_index); | |
903 | else | |
904 | continue; | |
b481de9c | 905 | |
95407aa4 DH |
906 | /* Constants mean 1 transmission, 0 successes */ |
907 | if (i < retries) | |
908 | rs_collect_tx_data(window, rs_index, tpt, 1, | |
909 | 0); | |
99556438 | 910 | else |
95407aa4 DH |
911 | rs_collect_tx_data(window, rs_index, tpt, 1, |
912 | legacy_success); | |
913 | } | |
914 | ||
915 | /* Update success/fail counts if not searching for new mode */ | |
916 | if (lq_sta->stay_in_tbl) { | |
917 | lq_sta->total_success += legacy_success; | |
918 | lq_sta->total_failed += retries + (1 - legacy_success); | |
99556438 | 919 | } |
b481de9c | 920 | } |
95407aa4 DH |
921 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ |
922 | lq_sta->last_rate_n_flags = tx_rate; | |
b481de9c | 923 | |
77626355 | 924 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c | 925 | if (sta && sta->supp_rates[sband->band]) |
514d65c1 | 926 | rs_rate_scale_perform(priv, skb, sta, lq_sta); |
b481de9c ZY |
927 | } |
928 | ||
77626355 BC |
929 | /* |
930 | * Begin a period of staying with a selected modulation mode. | |
931 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
932 | * Set frame tx success limits according to legacy vs. high-throughput, | |
933 | * and reset overall (spanning all rates) tx success history statistics. | |
934 | * These control how long we stay using same modulation mode before | |
935 | * searching for a new mode. | |
936 | */ | |
bf403db8 | 937 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 938 | struct iwl_lq_sta *lq_sta) |
b481de9c | 939 | { |
e1623446 | 940 | IWL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
c33104f0 | 941 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 942 | if (is_legacy) { |
c33104f0 TW |
943 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
944 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
945 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 946 | } else { |
c33104f0 TW |
947 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
948 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
949 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 950 | } |
c33104f0 TW |
951 | lq_sta->table_count = 0; |
952 | lq_sta->total_failed = 0; | |
953 | lq_sta->total_success = 0; | |
447fee70 | 954 | lq_sta->flush_timer = jiffies; |
d6e93399 | 955 | lq_sta->action_counter = 0; |
b481de9c ZY |
956 | } |
957 | ||
77626355 BC |
958 | /* |
959 | * Find correct throughput table for given mode of modulation | |
960 | */ | |
e227ceac TW |
961 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
962 | struct iwl_scale_tbl_info *tbl) | |
b481de9c | 963 | { |
e3949d62 DH |
964 | /* Used to choose among HT tables */ |
965 | s32 (*ht_tbl_pointer)[IWL_RATE_COUNT]; | |
966 | ||
967 | /* Check for invalid LQ type */ | |
968 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
969 | tbl->expected_tpt = expected_tpt_legacy; | |
970 | return; | |
971 | } | |
972 | ||
973 | /* Legacy rates have only one table */ | |
b481de9c | 974 | if (is_legacy(tbl->lq_type)) { |
e3949d62 DH |
975 | tbl->expected_tpt = expected_tpt_legacy; |
976 | return; | |
977 | } | |
978 | ||
979 | /* Choose among many HT tables depending on number of streams | |
980 | * (SISO/MIMO2/MIMO3), channel width (20/40), SGI, and aggregation | |
981 | * status */ | |
982 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
983 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
984 | else if (is_siso(tbl->lq_type)) | |
985 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
986 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
987 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
988 | else if (is_mimo2(tbl->lq_type)) | |
989 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
990 | else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
991 | ht_tbl_pointer = expected_tpt_mimo3_20MHz; | |
992 | else /* if (is_mimo3(tbl->lq_type)) <-- must be true */ | |
993 | ht_tbl_pointer = expected_tpt_mimo3_40MHz; | |
994 | ||
995 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ | |
996 | tbl->expected_tpt = ht_tbl_pointer[0]; | |
997 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
998 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
999 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
1000 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
1001 | else /* AGG+SGI */ | |
1002 | tbl->expected_tpt = ht_tbl_pointer[3]; | |
b481de9c ZY |
1003 | } |
1004 | ||
77626355 BC |
1005 | /* |
1006 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1007 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1008 | * above the current measured throughput of "active" mode, to give new mode | |
1009 | * a fair chance to prove itself without too many challenges. | |
1010 | * | |
1011 | * This gets called when transitioning to more aggressive modulation | |
1012 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1013 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1014 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1015 | * bit rate will typically need to increase, but not if performance was bad. | |
1016 | */ | |
c79dd5b5 | 1017 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1018 | struct iwl_lq_sta *lq_sta, |
1019 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1020 | u16 rate_mask, s8 index) |
b481de9c | 1021 | { |
77626355 | 1022 | /* "active" values */ |
e227ceac | 1023 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1024 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1025 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1026 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1027 | |
1028 | /* expected "search" throughput */ | |
1029 | s32 *tpt_tbl = tbl->expected_tpt; | |
1030 | ||
1031 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1032 | u16 high_low; |
f935a6da | 1033 | s8 rate = index; |
b481de9c ZY |
1034 | |
1035 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1036 | ||
1037 | for (; ;) { | |
bf403db8 EK |
1038 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1039 | tbl->lq_type); | |
b481de9c ZY |
1040 | |
1041 | low = high_low & 0xff; | |
1042 | high = (high_low >> 8) & 0xff; | |
1043 | ||
77626355 BC |
1044 | /* |
1045 | * Lower the "search" bit rate, to give new "search" mode | |
1046 | * approximately the same throughput as "active" if: | |
1047 | * | |
1048 | * 1) "Active" mode has been working modestly well (but not | |
1049 | * great), and expected "search" throughput (under perfect | |
1050 | * conditions) at candidate rate is above the actual | |
1051 | * measured "active" throughput (but less than expected | |
1052 | * "active" throughput under perfect conditions). | |
1053 | * OR | |
1054 | * 2) "Active" mode has been working perfectly or very well | |
1055 | * and expected "search" throughput (under perfect | |
1056 | * conditions) at candidate rate is above expected | |
1057 | * "active" throughput (under perfect conditions). | |
1058 | */ | |
c33104f0 | 1059 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1060 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1061 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1062 | (tpt_tbl[rate] <= active_tpt))) || | |
1063 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1064 | (tpt_tbl[rate] > active_tpt))) { | |
1065 | ||
77626355 BC |
1066 | /* (2nd or later pass) |
1067 | * If we've already tried to raise the rate, and are | |
1068 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1069 | if (start_hi != IWL_RATE_INVALID) { |
1070 | new_rate = start_hi; | |
1071 | break; | |
1072 | } | |
77626355 | 1073 | |
b481de9c | 1074 | new_rate = rate; |
77626355 BC |
1075 | |
1076 | /* Loop again with lower rate */ | |
b481de9c ZY |
1077 | if (low != IWL_RATE_INVALID) |
1078 | rate = low; | |
77626355 BC |
1079 | |
1080 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1081 | else |
1082 | break; | |
77626355 BC |
1083 | |
1084 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1085 | } else { |
77626355 BC |
1086 | /* (2nd or later pass) |
1087 | * If we've already tried to lower the rate, and are | |
1088 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1089 | if (new_rate != IWL_RATE_INVALID) |
1090 | break; | |
77626355 BC |
1091 | |
1092 | /* Loop again with higher rate */ | |
b481de9c ZY |
1093 | else if (high != IWL_RATE_INVALID) { |
1094 | start_hi = high; | |
1095 | rate = high; | |
77626355 BC |
1096 | |
1097 | /* Higher rate not available, use the original */ | |
b481de9c | 1098 | } else { |
90d7795e | 1099 | new_rate = rate; |
b481de9c ZY |
1100 | break; |
1101 | } | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | return new_rate; | |
1106 | } | |
b481de9c | 1107 | |
77626355 | 1108 | /* |
584a0f00 | 1109 | * Set up search table for MIMO2 |
77626355 | 1110 | */ |
fde0db31 | 1111 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1112 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1113 | struct ieee80211_conf *conf, |
4b7679a5 | 1114 | struct ieee80211_sta *sta, |
e227ceac | 1115 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1116 | { |
b481de9c ZY |
1117 | u16 rate_mask; |
1118 | s32 rate; | |
c33104f0 | 1119 | s8 is_green = lq_sta->is_green; |
b481de9c | 1120 | |
de27e64e | 1121 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1122 | return -1; |
1123 | ||
d9fe60de | 1124 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1125 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1126 | return -1; |
1127 | ||
77626355 | 1128 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1129 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1130 | return -1; |
1131 | ||
e1623446 | 1132 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1133 | |
1134 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1135 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1136 | tbl->action = 0; |
d6e93399 | 1137 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 GC |
1138 | rate_mask = lq_sta->active_mimo2_rate; |
1139 | ||
7aafef1c WYG |
1140 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1141 | tbl->is_ht40 = 1; | |
b481de9c | 1142 | else |
7aafef1c | 1143 | tbl->is_ht40 = 0; |
b481de9c | 1144 | |
eecd6e57 | 1145 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1146 | |
f935a6da | 1147 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1148 | |
e1623446 | 1149 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
584a0f00 WYG |
1150 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
1151 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", | |
1152 | rate, rate_mask); | |
1153 | return -1; | |
1154 | } | |
1155 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); | |
1156 | ||
1157 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", | |
1158 | tbl->current_rate, is_green); | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | /* | |
1163 | * Set up search table for MIMO3 | |
1164 | */ | |
1165 | static int rs_switch_to_mimo3(struct iwl_priv *priv, | |
1166 | struct iwl_lq_sta *lq_sta, | |
1167 | struct ieee80211_conf *conf, | |
1168 | struct ieee80211_sta *sta, | |
1169 | struct iwl_scale_tbl_info *tbl, int index) | |
1170 | { | |
1171 | u16 rate_mask; | |
1172 | s32 rate; | |
1173 | s8 is_green = lq_sta->is_green; | |
1174 | ||
1175 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1176 | return -1; | |
1177 | ||
1178 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) | |
1179 | == WLAN_HT_CAP_SM_PS_STATIC) | |
1180 | return -1; | |
1181 | ||
1182 | /* Need both Tx chains/antennas to support MIMO */ | |
1183 | if (priv->hw_params.tx_chains_num < 3) | |
1184 | return -1; | |
1185 | ||
1186 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); | |
1187 | ||
1188 | tbl->lq_type = LQ_MIMO3; | |
1189 | tbl->is_dup = lq_sta->is_dup; | |
1190 | tbl->action = 0; | |
d6e93399 | 1191 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; |
584a0f00 WYG |
1192 | rate_mask = lq_sta->active_mimo3_rate; |
1193 | ||
7aafef1c WYG |
1194 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1195 | tbl->is_ht40 = 1; | |
584a0f00 | 1196 | else |
7aafef1c | 1197 | tbl->is_ht40 = 0; |
39e88504 | 1198 | |
584a0f00 WYG |
1199 | rs_set_expected_tpt_table(lq_sta, tbl); |
1200 | ||
1201 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); | |
1202 | ||
1203 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n", | |
1204 | rate, rate_mask); | |
39e88504 | 1205 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1206 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
39e88504 | 1207 | rate, rate_mask); |
b481de9c | 1208 | return -1; |
39e88504 | 1209 | } |
978785a3 | 1210 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
b481de9c | 1211 | |
e1623446 | 1212 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1213 | tbl->current_rate, is_green); |
dc2453ae | 1214 | return 0; |
fde0db31 | 1215 | } |
b481de9c | 1216 | |
77626355 BC |
1217 | /* |
1218 | * Set up search table for SISO | |
1219 | */ | |
c79dd5b5 | 1220 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1221 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1222 | struct ieee80211_conf *conf, |
4b7679a5 | 1223 | struct ieee80211_sta *sta, |
e227ceac | 1224 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1225 | { |
b481de9c | 1226 | u16 rate_mask; |
c33104f0 | 1227 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1228 | s32 rate; |
1229 | ||
de27e64e | 1230 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1231 | return -1; |
1232 | ||
e1623446 | 1233 | IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n"); |
39e88504 | 1234 | |
c33104f0 | 1235 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1236 | tbl->lq_type = LQ_SISO; |
1237 | tbl->action = 0; | |
d6e93399 | 1238 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 | 1239 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1240 | |
7aafef1c WYG |
1241 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1242 | tbl->is_ht40 = 1; | |
b481de9c | 1243 | else |
7aafef1c | 1244 | tbl->is_ht40 = 0; |
b481de9c | 1245 | |
b481de9c | 1246 | if (is_green) |
39e88504 | 1247 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1248 | |
eecd6e57 | 1249 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1250 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1251 | |
e1623446 | 1252 | IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1253 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1254 | IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1255 | rate, rate_mask); |
1256 | return -1; | |
1257 | } | |
978785a3 | 1258 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
e1623446 | 1259 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1260 | tbl->current_rate, is_green); |
403ab56b | 1261 | return 0; |
b481de9c ZY |
1262 | } |
1263 | ||
77626355 BC |
1264 | /* |
1265 | * Try to switch to new modulation mode from legacy | |
1266 | */ | |
c79dd5b5 | 1267 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1268 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1269 | struct ieee80211_conf *conf, |
4b7679a5 | 1270 | struct ieee80211_sta *sta, |
b481de9c ZY |
1271 | int index) |
1272 | { | |
e227ceac TW |
1273 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1274 | struct iwl_scale_tbl_info *search_tbl = | |
1275 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1276 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1277 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1278 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1279 | u8 start_action = tbl->action; |
fde0db31 | 1280 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1281 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1282 | int ret = 0; |
d6e93399 | 1283 | u8 update_search_tbl_counter = 0; |
b481de9c | 1284 | |
46f9381a WYG |
1285 | if (!iwl_ht_enabled(priv)) |
1286 | /* stay in Legacy */ | |
1287 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
3ad3b92a | 1288 | else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1289 | tbl->action > IWL_LEGACY_SWITCH_SISO) |
1290 | tbl->action = IWL_LEGACY_SWITCH_SISO; | |
b481de9c | 1291 | for (; ;) { |
d6e93399 | 1292 | lq_sta->action_counter++; |
b481de9c | 1293 | switch (tbl->action) { |
3110bef7 GC |
1294 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1295 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
e1623446 | 1296 | IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
b481de9c | 1297 | |
3110bef7 GC |
1298 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1299 | tx_chains_num <= 1) || | |
1300 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1301 | tx_chains_num <= 2)) | |
1302 | break; | |
1303 | ||
77626355 | 1304 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1305 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1306 | break; | |
77626355 | 1307 | |
77626355 | 1308 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1309 | memcpy(search_tbl, tbl, sz); |
1310 | ||
aade00ce GC |
1311 | if (rs_toggle_antenna(valid_tx_ant, |
1312 | &search_tbl->current_rate, search_tbl)) { | |
d6e93399 | 1313 | update_search_tbl_counter = 1; |
3110bef7 | 1314 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1315 | goto out; |
1316 | } | |
a5e8b505 | 1317 | break; |
b481de9c | 1318 | case IWL_LEGACY_SWITCH_SISO: |
e1623446 | 1319 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
77626355 BC |
1320 | |
1321 | /* Set up search table to try SISO */ | |
b481de9c | 1322 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1323 | search_tbl->is_SGI = 0; |
c33104f0 | 1324 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1325 | search_tbl, index); |
dc2453ae | 1326 | if (!ret) { |
c33104f0 | 1327 | lq_sta->action_counter = 0; |
b481de9c | 1328 | goto out; |
dc2453ae | 1329 | } |
b481de9c ZY |
1330 | |
1331 | break; | |
3110bef7 GC |
1332 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1333 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1334 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
e1623446 | 1335 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1336 | |
1337 | /* Set up search table to try MIMO */ | |
b481de9c | 1338 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1339 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1340 | |
1341 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1342 | search_tbl->ant_type = ANT_AB; | |
1343 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1344 | search_tbl->ant_type = ANT_AC; | |
1345 | else | |
1346 | search_tbl->ant_type = ANT_BC; | |
1347 | ||
1348 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1349 | break; | |
1350 | ||
fde0db31 | 1351 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1352 | search_tbl, index); |
dc2453ae | 1353 | if (!ret) { |
c33104f0 | 1354 | lq_sta->action_counter = 0; |
b481de9c | 1355 | goto out; |
dc2453ae | 1356 | } |
b481de9c | 1357 | break; |
584a0f00 WYG |
1358 | |
1359 | case IWL_LEGACY_SWITCH_MIMO3_ABC: | |
1360 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); | |
1361 | ||
1362 | /* Set up search table to try MIMO3 */ | |
1363 | memcpy(search_tbl, tbl, sz); | |
1364 | search_tbl->is_SGI = 0; | |
1365 | ||
1366 | search_tbl->ant_type = ANT_ABC; | |
1367 | ||
1368 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1369 | break; | |
1370 | ||
1371 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1372 | search_tbl, index); | |
1373 | if (!ret) { | |
1374 | lq_sta->action_counter = 0; | |
1375 | goto out; | |
1376 | } | |
1377 | break; | |
b481de9c ZY |
1378 | } |
1379 | tbl->action++; | |
584a0f00 | 1380 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1381 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
b481de9c ZY |
1382 | |
1383 | if (tbl->action == start_action) | |
1384 | break; | |
1385 | ||
1386 | } | |
3110bef7 | 1387 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1388 | return 0; |
1389 | ||
3110bef7 GC |
1390 | out: |
1391 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1392 | tbl->action++; |
584a0f00 | 1393 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1394 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
d6e93399 MA |
1395 | if (update_search_tbl_counter) |
1396 | search_tbl->action = tbl->action; | |
b481de9c ZY |
1397 | return 0; |
1398 | ||
1399 | } | |
1400 | ||
77626355 BC |
1401 | /* |
1402 | * Try to switch to new modulation mode from SISO | |
1403 | */ | |
c79dd5b5 | 1404 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1405 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1406 | struct ieee80211_conf *conf, |
4b7679a5 | 1407 | struct ieee80211_sta *sta, int index) |
b481de9c | 1408 | { |
c33104f0 | 1409 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1410 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1411 | struct iwl_scale_tbl_info *search_tbl = | |
1412 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1413 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1414 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1415 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1416 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1417 | u8 start_action = tbl->action; |
fde0db31 | 1418 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1419 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
d6e93399 | 1420 | u8 update_search_tbl_counter = 0; |
fde0db31 | 1421 | int ret; |
b481de9c | 1422 | |
3ad3b92a | 1423 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1424 | tbl->action > IWL_SISO_SWITCH_ANTENNA2) { |
1425 | /* stay in SISO */ | |
1426 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; | |
1427 | } | |
b481de9c | 1428 | for (;;) { |
c33104f0 | 1429 | lq_sta->action_counter++; |
b481de9c | 1430 | switch (tbl->action) { |
3110bef7 GC |
1431 | case IWL_SISO_SWITCH_ANTENNA1: |
1432 | case IWL_SISO_SWITCH_ANTENNA2: | |
e1623446 | 1433 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1434 | |
1435 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1436 | tx_chains_num <= 1) || | |
1437 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1438 | tx_chains_num <= 2)) | |
1439 | break; | |
1440 | ||
b481de9c ZY |
1441 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1442 | break; | |
b481de9c ZY |
1443 | |
1444 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1445 | if (rs_toggle_antenna(valid_tx_ant, |
d6e93399 MA |
1446 | &search_tbl->current_rate, search_tbl)) { |
1447 | update_search_tbl_counter = 1; | |
aade00ce | 1448 | goto out; |
d6e93399 | 1449 | } |
a5e8b505 | 1450 | break; |
3110bef7 GC |
1451 | case IWL_SISO_SWITCH_MIMO2_AB: |
1452 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1453 | case IWL_SISO_SWITCH_MIMO2_BC: | |
e1623446 | 1454 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
b481de9c | 1455 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1456 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1457 | |
1458 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1459 | search_tbl->ant_type = ANT_AB; | |
1460 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1461 | search_tbl->ant_type = ANT_AC; | |
1462 | else | |
1463 | search_tbl->ant_type = ANT_BC; | |
1464 | ||
1465 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1466 | break; | |
1467 | ||
fde0db31 | 1468 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1469 | search_tbl, index); |
3110bef7 | 1470 | if (!ret) |
b481de9c ZY |
1471 | goto out; |
1472 | break; | |
1473 | case IWL_SISO_SWITCH_GI: | |
28e6f489 DH |
1474 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1475 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1476 | break; |
28e6f489 DH |
1477 | if (tbl->is_ht40 && !(ht_cap->cap & |
1478 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1479 | break; |
1480 | ||
e1623446 | 1481 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1482 | |
b481de9c | 1483 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1484 | if (is_green) { |
1485 | if (!tbl->is_SGI) | |
1486 | break; | |
1487 | else | |
15b1687c WT |
1488 | IWL_ERR(priv, |
1489 | "SGI was set in GF+SISO\n"); | |
b481de9c | 1490 | } |
39e88504 | 1491 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1492 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1493 | if (tbl->is_SGI) { |
1494 | s32 tpt = lq_sta->last_tpt / 100; | |
1495 | if (tpt >= search_tbl->expected_tpt[index]) | |
1496 | break; | |
1497 | } | |
978785a3 TW |
1498 | search_tbl->current_rate = |
1499 | rate_n_flags_from_tbl(priv, search_tbl, | |
1500 | index, is_green); | |
d6e93399 | 1501 | update_search_tbl_counter = 1; |
b481de9c | 1502 | goto out; |
584a0f00 WYG |
1503 | case IWL_SISO_SWITCH_MIMO3_ABC: |
1504 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); | |
1505 | memcpy(search_tbl, tbl, sz); | |
1506 | search_tbl->is_SGI = 0; | |
1507 | search_tbl->ant_type = ANT_ABC; | |
1508 | ||
1509 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1510 | break; | |
1511 | ||
1512 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1513 | search_tbl, index); | |
1514 | if (!ret) | |
1515 | goto out; | |
1516 | break; | |
b481de9c ZY |
1517 | } |
1518 | tbl->action++; | |
584a0f00 | 1519 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1520 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1521 | |
1522 | if (tbl->action == start_action) | |
1523 | break; | |
1524 | } | |
3110bef7 | 1525 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1526 | return 0; |
1527 | ||
1528 | out: | |
3110bef7 | 1529 | lq_sta->search_better_tbl = 1; |
b481de9c | 1530 | tbl->action++; |
584a0f00 | 1531 | if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC) |
3110bef7 | 1532 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
d6e93399 MA |
1533 | if (update_search_tbl_counter) |
1534 | search_tbl->action = tbl->action; | |
1535 | ||
b481de9c ZY |
1536 | return 0; |
1537 | } | |
1538 | ||
77626355 | 1539 | /* |
584a0f00 | 1540 | * Try to switch to new modulation mode from MIMO2 |
77626355 | 1541 | */ |
584a0f00 | 1542 | static int rs_move_mimo2_to_other(struct iwl_priv *priv, |
e227ceac | 1543 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1544 | struct ieee80211_conf *conf, |
4b7679a5 | 1545 | struct ieee80211_sta *sta, int index) |
b481de9c | 1546 | { |
c33104f0 | 1547 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1548 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1549 | struct iwl_scale_tbl_info *search_tbl = | |
1550 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1551 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
28e6f489 | 1552 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1553 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1554 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1555 | u8 start_action = tbl->action; |
3110bef7 GC |
1556 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1557 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
d6e93399 | 1558 | u8 update_search_tbl_counter = 0; |
aade00ce | 1559 | int ret; |
b481de9c | 1560 | |
3ad3b92a | 1561 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1562 | (tbl->action < IWL_MIMO2_SWITCH_SISO_A || |
1563 | tbl->action > IWL_MIMO2_SWITCH_SISO_C)) { | |
1564 | /* switch in SISO */ | |
1565 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1566 | } | |
b481de9c | 1567 | for (;;) { |
c33104f0 | 1568 | lq_sta->action_counter++; |
b481de9c | 1569 | switch (tbl->action) { |
3110bef7 GC |
1570 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1571 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
584a0f00 | 1572 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); |
3110bef7 GC |
1573 | |
1574 | if (tx_chains_num <= 2) | |
1575 | break; | |
1576 | ||
1577 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1578 | break; | |
1579 | ||
1580 | memcpy(search_tbl, tbl, sz); | |
1581 | if (rs_toggle_antenna(valid_tx_ant, | |
d6e93399 MA |
1582 | &search_tbl->current_rate, search_tbl)) { |
1583 | update_search_tbl_counter = 1; | |
3110bef7 | 1584 | goto out; |
d6e93399 | 1585 | } |
3110bef7 GC |
1586 | break; |
1587 | case IWL_MIMO2_SWITCH_SISO_A: | |
1588 | case IWL_MIMO2_SWITCH_SISO_B: | |
1589 | case IWL_MIMO2_SWITCH_SISO_C: | |
e1623446 | 1590 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1591 | |
77626355 | 1592 | /* Set up new search table for SISO */ |
b481de9c | 1593 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1594 | |
3110bef7 | 1595 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1596 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1597 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1598 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1599 | else |
1600 | search_tbl->ant_type = ANT_C; | |
1601 | ||
1602 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1603 | break; | |
b481de9c | 1604 | |
c33104f0 | 1605 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1606 | search_tbl, index); |
3110bef7 | 1607 | if (!ret) |
b481de9c | 1608 | goto out; |
3110bef7 | 1609 | |
b481de9c ZY |
1610 | break; |
1611 | ||
3110bef7 | 1612 | case IWL_MIMO2_SWITCH_GI: |
28e6f489 DH |
1613 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1614 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1615 | break; |
28e6f489 DH |
1616 | if (tbl->is_ht40 && !(ht_cap->cap & |
1617 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1618 | break; |
1619 | ||
584a0f00 | 1620 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); |
77626355 | 1621 | |
584a0f00 | 1622 | /* Set up new search table for MIMO2 */ |
b481de9c | 1623 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1624 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1625 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1626 | /* |
1627 | * If active table already uses the fastest possible | |
1628 | * modulation (dual stream with short guard interval), | |
1629 | * and it's working well, there's no need to look | |
1630 | * for a better type of modulation! | |
1631 | */ | |
39e88504 | 1632 | if (tbl->is_SGI) { |
c33104f0 | 1633 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1634 | if (tpt >= search_tbl->expected_tpt[index]) |
1635 | break; | |
b481de9c | 1636 | } |
978785a3 TW |
1637 | search_tbl->current_rate = |
1638 | rate_n_flags_from_tbl(priv, search_tbl, | |
1639 | index, is_green); | |
d6e93399 | 1640 | update_search_tbl_counter = 1; |
b481de9c ZY |
1641 | goto out; |
1642 | ||
584a0f00 WYG |
1643 | case IWL_MIMO2_SWITCH_MIMO3_ABC: |
1644 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); | |
1645 | memcpy(search_tbl, tbl, sz); | |
1646 | search_tbl->is_SGI = 0; | |
1647 | search_tbl->ant_type = ANT_ABC; | |
1648 | ||
1649 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1650 | break; | |
1651 | ||
1652 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1653 | search_tbl, index); | |
1654 | if (!ret) | |
1655 | goto out; | |
1656 | ||
1657 | break; | |
b481de9c ZY |
1658 | } |
1659 | tbl->action++; | |
584a0f00 | 1660 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1661 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
b481de9c ZY |
1662 | |
1663 | if (tbl->action == start_action) | |
1664 | break; | |
1665 | } | |
3110bef7 | 1666 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1667 | return 0; |
1668 | out: | |
3110bef7 | 1669 | lq_sta->search_better_tbl = 1; |
b481de9c | 1670 | tbl->action++; |
584a0f00 | 1671 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1672 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
d6e93399 MA |
1673 | if (update_search_tbl_counter) |
1674 | search_tbl->action = tbl->action; | |
1675 | ||
b481de9c ZY |
1676 | return 0; |
1677 | ||
1678 | } | |
1679 | ||
584a0f00 WYG |
1680 | /* |
1681 | * Try to switch to new modulation mode from MIMO3 | |
1682 | */ | |
1683 | static int rs_move_mimo3_to_other(struct iwl_priv *priv, | |
1684 | struct iwl_lq_sta *lq_sta, | |
1685 | struct ieee80211_conf *conf, | |
1686 | struct ieee80211_sta *sta, int index) | |
1687 | { | |
1688 | s8 is_green = lq_sta->is_green; | |
1689 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1690 | struct iwl_scale_tbl_info *search_tbl = | |
1691 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1692 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1693 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
584a0f00 WYG |
1694 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1695 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1696 | u8 start_action = tbl->action; | |
1697 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; | |
1698 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
1699 | int ret; | |
d6e93399 | 1700 | u8 update_search_tbl_counter = 0; |
584a0f00 | 1701 | |
3ad3b92a | 1702 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1703 | (tbl->action < IWL_MIMO3_SWITCH_SISO_A || |
1704 | tbl->action > IWL_MIMO3_SWITCH_SISO_C)) { | |
1705 | /* switch in SISO */ | |
1706 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; | |
1707 | } | |
584a0f00 WYG |
1708 | for (;;) { |
1709 | lq_sta->action_counter++; | |
1710 | switch (tbl->action) { | |
1711 | case IWL_MIMO3_SWITCH_ANTENNA1: | |
1712 | case IWL_MIMO3_SWITCH_ANTENNA2: | |
1713 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); | |
1714 | ||
1715 | if (tx_chains_num <= 3) | |
1716 | break; | |
1717 | ||
1718 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1719 | break; | |
1720 | ||
1721 | memcpy(search_tbl, tbl, sz); | |
1722 | if (rs_toggle_antenna(valid_tx_ant, | |
1723 | &search_tbl->current_rate, search_tbl)) | |
1724 | goto out; | |
1725 | break; | |
1726 | case IWL_MIMO3_SWITCH_SISO_A: | |
1727 | case IWL_MIMO3_SWITCH_SISO_B: | |
1728 | case IWL_MIMO3_SWITCH_SISO_C: | |
1729 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); | |
1730 | ||
1731 | /* Set up new search table for SISO */ | |
1732 | memcpy(search_tbl, tbl, sz); | |
1733 | ||
1734 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) | |
1735 | search_tbl->ant_type = ANT_A; | |
1736 | else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) | |
1737 | search_tbl->ant_type = ANT_B; | |
1738 | else | |
1739 | search_tbl->ant_type = ANT_C; | |
1740 | ||
1741 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1742 | break; | |
1743 | ||
1744 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, | |
1745 | search_tbl, index); | |
1746 | if (!ret) | |
1747 | goto out; | |
1748 | ||
1749 | break; | |
1750 | ||
1751 | case IWL_MIMO3_SWITCH_MIMO2_AB: | |
1752 | case IWL_MIMO3_SWITCH_MIMO2_AC: | |
1753 | case IWL_MIMO3_SWITCH_MIMO2_BC: | |
1754 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); | |
1755 | ||
1756 | memcpy(search_tbl, tbl, sz); | |
1757 | search_tbl->is_SGI = 0; | |
1758 | if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) | |
1759 | search_tbl->ant_type = ANT_AB; | |
1760 | else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) | |
1761 | search_tbl->ant_type = ANT_AC; | |
1762 | else | |
1763 | search_tbl->ant_type = ANT_BC; | |
1764 | ||
1765 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1766 | break; | |
1767 | ||
1768 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
1769 | search_tbl, index); | |
1770 | if (!ret) | |
1771 | goto out; | |
1772 | ||
1773 | break; | |
1774 | ||
1775 | case IWL_MIMO3_SWITCH_GI: | |
28e6f489 DH |
1776 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1777 | IEEE80211_HT_CAP_SGI_20)) | |
584a0f00 | 1778 | break; |
28e6f489 DH |
1779 | if (tbl->is_ht40 && !(ht_cap->cap & |
1780 | IEEE80211_HT_CAP_SGI_40)) | |
584a0f00 WYG |
1781 | break; |
1782 | ||
1783 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); | |
1784 | ||
1785 | /* Set up new search table for MIMO */ | |
1786 | memcpy(search_tbl, tbl, sz); | |
1787 | search_tbl->is_SGI = !tbl->is_SGI; | |
1788 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1789 | /* | |
1790 | * If active table already uses the fastest possible | |
1791 | * modulation (dual stream with short guard interval), | |
1792 | * and it's working well, there's no need to look | |
1793 | * for a better type of modulation! | |
1794 | */ | |
1795 | if (tbl->is_SGI) { | |
1796 | s32 tpt = lq_sta->last_tpt / 100; | |
1797 | if (tpt >= search_tbl->expected_tpt[index]) | |
1798 | break; | |
1799 | } | |
1800 | search_tbl->current_rate = | |
1801 | rate_n_flags_from_tbl(priv, search_tbl, | |
1802 | index, is_green); | |
d6e93399 | 1803 | update_search_tbl_counter = 1; |
584a0f00 WYG |
1804 | goto out; |
1805 | } | |
1806 | tbl->action++; | |
1807 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1808 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
1809 | ||
1810 | if (tbl->action == start_action) | |
1811 | break; | |
1812 | } | |
1813 | search_tbl->lq_type = LQ_NONE; | |
1814 | return 0; | |
1815 | out: | |
1816 | lq_sta->search_better_tbl = 1; | |
1817 | tbl->action++; | |
1818 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1819 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
d6e93399 MA |
1820 | if (update_search_tbl_counter) |
1821 | search_tbl->action = tbl->action; | |
1822 | ||
584a0f00 WYG |
1823 | return 0; |
1824 | ||
1825 | } | |
1826 | ||
77626355 BC |
1827 | /* |
1828 | * Check whether we should continue using same modulation mode, or | |
1829 | * begin search for a new mode, based on: | |
1830 | * 1) # tx successes or failures while using this mode | |
1831 | * 2) # times calling this function | |
1832 | * 3) elapsed time in this mode (not used, for now) | |
1833 | */ | |
e227ceac | 1834 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1835 | { |
e227ceac | 1836 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1837 | int i; |
1838 | int active_tbl; | |
1839 | int flush_interval_passed = 0; | |
bf403db8 | 1840 | struct iwl_priv *priv; |
b481de9c | 1841 | |
bf403db8 | 1842 | priv = lq_sta->drv; |
c33104f0 | 1843 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1844 | |
c33104f0 | 1845 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1846 | |
77626355 | 1847 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1848 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1849 | |
77626355 | 1850 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1851 | if (lq_sta->flush_timer) |
b481de9c | 1852 | flush_interval_passed = |
447fee70 MA |
1853 | time_after(jiffies, |
1854 | (unsigned long)(lq_sta->flush_timer + | |
b481de9c ZY |
1855 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1856 | ||
77626355 BC |
1857 | /* |
1858 | * Check if we should allow search for new modulation mode. | |
1859 | * If many frames have failed or succeeded, or we've used | |
1860 | * this same modulation for a long time, allow search, and | |
1861 | * reset history stats that keep track of whether we should | |
1862 | * allow a new search. Also (below) reset all bitmaps and | |
1863 | * stats in active history. | |
1864 | */ | |
c33104f0 TW |
1865 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1866 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1867 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1868 | && (flush_interval_passed))) { |
e1623446 | 1869 | IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1870 | lq_sta->total_failed, |
1871 | lq_sta->total_success, | |
b481de9c | 1872 | flush_interval_passed); |
77626355 BC |
1873 | |
1874 | /* Allow search for new mode */ | |
c33104f0 TW |
1875 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1876 | lq_sta->total_failed = 0; | |
1877 | lq_sta->total_success = 0; | |
1878 | lq_sta->flush_timer = 0; | |
77626355 BC |
1879 | |
1880 | /* | |
1881 | * Else if we've used this modulation mode enough repetitions | |
1882 | * (regardless of elapsed time or success/failure), reset | |
1883 | * history bitmaps and rate-specific stats for all rates in | |
1884 | * active table. | |
1885 | */ | |
403ab56b | 1886 | } else { |
c33104f0 TW |
1887 | lq_sta->table_count++; |
1888 | if (lq_sta->table_count >= | |
1889 | lq_sta->table_count_limit) { | |
1890 | lq_sta->table_count = 0; | |
b481de9c | 1891 | |
e1623446 | 1892 | IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
b481de9c ZY |
1893 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1894 | rs_rate_scale_clear_window( | |
1895 | &(tbl->win[i])); | |
1896 | } | |
1897 | } | |
1898 | ||
77626355 BC |
1899 | /* If transitioning to allow "search", reset all history |
1900 | * bitmaps and stats in active table (this will become the new | |
1901 | * "search" table). */ | |
c33104f0 | 1902 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1903 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1904 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1905 | } | |
1906 | } | |
1907 | } | |
1908 | ||
e3139fe7 WYG |
1909 | /* |
1910 | * setup rate table in uCode | |
1911 | * return rate_n_flags as used in the table | |
1912 | */ | |
1913 | static u32 rs_update_rate_tbl(struct iwl_priv *priv, | |
1914 | struct iwl_lq_sta *lq_sta, | |
1915 | struct iwl_scale_tbl_info *tbl, | |
1916 | int index, u8 is_green) | |
1917 | { | |
1918 | u32 rate; | |
1919 | ||
1920 | /* Update uCode's rate table. */ | |
1921 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); | |
1922 | rs_fill_link_cmd(priv, lq_sta, rate); | |
1923 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
1924 | ||
1925 | return rate; | |
1926 | } | |
1927 | ||
77626355 BC |
1928 | /* |
1929 | * Do rate scaling and search for new modulation mode. | |
1930 | */ | |
c79dd5b5 | 1931 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 1932 | struct sk_buff *skb, |
4b7679a5 JB |
1933 | struct ieee80211_sta *sta, |
1934 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 1935 | { |
4b7679a5 | 1936 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 1937 | struct ieee80211_conf *conf = &hw->conf; |
514d65c1 GS |
1938 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1939 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
b481de9c ZY |
1940 | int low = IWL_RATE_INVALID; |
1941 | int high = IWL_RATE_INVALID; | |
1942 | int index; | |
1943 | int i; | |
e227ceac | 1944 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1945 | int current_tpt = IWL_INVALID_VALUE; |
1946 | int low_tpt = IWL_INVALID_VALUE; | |
1947 | int high_tpt = IWL_INVALID_VALUE; | |
1948 | u32 fail_count; | |
1949 | s8 scale_action = 0; | |
fd7c8a40 | 1950 | u16 rate_mask; |
b481de9c | 1951 | u8 update_lq = 0; |
e227ceac | 1952 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1953 | u16 rate_scale_index_msk = 0; |
39e88504 | 1954 | u32 rate; |
b481de9c ZY |
1955 | u8 is_green = 0; |
1956 | u8 active_tbl = 0; | |
1957 | u8 done_search = 0; | |
1958 | u16 high_low; | |
a5e8b505 | 1959 | s32 sr; |
0c11b4de | 1960 | u8 tid = MAX_TID_COUNT; |
86b4766b | 1961 | struct iwl_tid_data *tid_data; |
b481de9c | 1962 | |
e1623446 | 1963 | IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 1964 | |
514d65c1 | 1965 | /* Send management frames and NO_ACK data using lowest rate. */ |
417f114b TW |
1966 | /* TODO: this could probably be improved.. */ |
1967 | if (!ieee80211_is_data(hdr->frame_control) || | |
514d65c1 | 1968 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c | 1969 | return; |
b481de9c | 1970 | |
4b7679a5 | 1971 | if (!sta || !lq_sta) |
b481de9c ZY |
1972 | return; |
1973 | ||
4b7679a5 | 1974 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1975 | |
faa29718 | 1976 | tid = rs_tl_add_packet(lq_sta, hdr); |
e3949d62 DH |
1977 | if ((tid != MAX_TID_COUNT) && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
1978 | tid_data = &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
1979 | if (tid_data->agg.state == IWL_AGG_OFF) | |
1980 | lq_sta->is_agg = 0; | |
1981 | else | |
1982 | lq_sta->is_agg = 1; | |
1983 | } else | |
1984 | lq_sta->is_agg = 0; | |
faa29718 | 1985 | |
77626355 BC |
1986 | /* |
1987 | * Select rate-scale / modulation-mode table to work with in | |
1988 | * the rest of this function: "search" if searching for better | |
1989 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1990 | */ | |
c33104f0 TW |
1991 | if (!lq_sta->search_better_tbl) |
1992 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1993 | else |
c33104f0 | 1994 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1995 | |
c33104f0 | 1996 | tbl = &(lq_sta->lq_info[active_tbl]); |
2681b20b WYG |
1997 | if (is_legacy(tbl->lq_type)) |
1998 | lq_sta->is_green = 0; | |
1999 | else | |
b261793d | 2000 | lq_sta->is_green = rs_use_green(sta, &priv->current_ht_config); |
c33104f0 | 2001 | is_green = lq_sta->is_green; |
b481de9c | 2002 | |
77626355 | 2003 | /* current tx rate */ |
b7e35008 | 2004 | index = lq_sta->last_txrate_idx; |
b481de9c | 2005 | |
e1623446 | 2006 | IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
b481de9c ZY |
2007 | tbl->lq_type); |
2008 | ||
77626355 | 2009 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 2010 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c | 2011 | |
e1623446 | 2012 | IWL_DEBUG_RATE(priv, "mask 0x%04X \n", rate_mask); |
b481de9c ZY |
2013 | |
2014 | /* mask with station rate restriction */ | |
2015 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 2016 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 2017 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 2018 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 2019 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
2020 | else |
2021 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 2022 | lq_sta->supp_rates); |
b481de9c ZY |
2023 | |
2024 | } else | |
2025 | rate_scale_index_msk = rate_mask; | |
2026 | ||
2027 | if (!rate_scale_index_msk) | |
2028 | rate_scale_index_msk = rate_mask; | |
2029 | ||
07bc28ed | 2030 | if (!((1 << index) & rate_scale_index_msk)) { |
15b1687c | 2031 | IWL_ERR(priv, "Current Rate is not valid\n"); |
e3139fe7 WYG |
2032 | if (lq_sta->search_better_tbl) { |
2033 | /* revert to active table if search table is not valid*/ | |
2034 | tbl->lq_type = LQ_NONE; | |
2035 | lq_sta->search_better_tbl = 0; | |
2036 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2037 | /* get "active" rate info */ | |
2038 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); | |
2039 | rate = rs_update_rate_tbl(priv, lq_sta, | |
2040 | tbl, index, is_green); | |
2041 | } | |
07bc28ed | 2042 | return; |
b481de9c ZY |
2043 | } |
2044 | ||
77626355 | 2045 | /* Get expected throughput table and history window for current rate */ |
07bc28ed | 2046 | if (!tbl->expected_tpt) { |
15b1687c | 2047 | IWL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
07bc28ed GC |
2048 | return; |
2049 | } | |
b481de9c | 2050 | |
c6ec7a9b AM |
2051 | /* force user max rate if set by user */ |
2052 | if ((lq_sta->max_rate_idx != -1) && | |
2053 | (lq_sta->max_rate_idx < index)) { | |
2054 | index = lq_sta->max_rate_idx; | |
2055 | update_lq = 1; | |
2056 | window = &(tbl->win[index]); | |
2057 | goto lq_update; | |
2058 | } | |
2059 | ||
b481de9c ZY |
2060 | window = &(tbl->win[index]); |
2061 | ||
77626355 BC |
2062 | /* |
2063 | * If there is not enough history to calculate actual average | |
2064 | * throughput, keep analyzing results of more tx frames, without | |
2065 | * changing rate or mode (bypass most of the rest of this function). | |
2066 | * Set up new rate table in uCode only if old rate is not supported | |
2067 | * in current association (use new rate found above). | |
2068 | */ | |
b481de9c | 2069 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
2070 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
2071 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
e1623446 | 2072 | IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
b481de9c ZY |
2073 | "for index %d\n", |
2074 | window->success_counter, window->counter, index); | |
77626355 BC |
2075 | |
2076 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 2077 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
2078 | |
2079 | /* Should we stay with this modulation mode, | |
2080 | * or search for a new one? */ | |
c33104f0 | 2081 | rs_stay_in_table(lq_sta); |
77626355 | 2082 | |
b481de9c | 2083 | goto out; |
3110bef7 | 2084 | } |
77626355 BC |
2085 | /* Else we have enough samples; calculate estimate of |
2086 | * actual average throughput */ | |
3110bef7 | 2087 | |
e3949d62 | 2088 | /* Sanity-check TPT calculations */ |
3110bef7 GC |
2089 | BUG_ON(window->average_tpt != ((window->success_ratio * |
2090 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 2091 | |
77626355 | 2092 | /* If we are searching for better modulation mode, check success. */ |
46f9381a | 2093 | if (lq_sta->search_better_tbl && |
3ad3b92a | 2094 | (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) { |
77626355 BC |
2095 | /* If good success, continue using the "search" mode; |
2096 | * no need to send new link quality command, since we're | |
2097 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
2098 | if (window->average_tpt > lq_sta->last_tpt) { |
2099 | ||
e1623446 | 2100 | IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
2101 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2102 | window->success_ratio, | |
2103 | window->average_tpt, | |
2104 | lq_sta->last_tpt); | |
2105 | ||
2106 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 2107 | lq_sta->enable_counter = 1; |
07bc28ed | 2108 | |
77626355 | 2109 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 2110 | lq_sta->active_tbl = active_tbl; |
b481de9c | 2111 | current_tpt = window->average_tpt; |
77626355 BC |
2112 | |
2113 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 2114 | } else { |
07bc28ed | 2115 | |
e1623446 | 2116 | IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
07bc28ed GC |
2117 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2118 | window->success_ratio, | |
2119 | window->average_tpt, | |
2120 | lq_sta->last_tpt); | |
2121 | ||
77626355 | 2122 | /* Nullify "search" table */ |
b481de9c | 2123 | tbl->lq_type = LQ_NONE; |
77626355 BC |
2124 | |
2125 | /* Revert to "active" table */ | |
c33104f0 TW |
2126 | active_tbl = lq_sta->active_tbl; |
2127 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 2128 | |
77626355 | 2129 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 2130 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 2131 | current_tpt = lq_sta->last_tpt; |
b481de9c | 2132 | |
77626355 | 2133 | /* Need to set up a new rate table in uCode */ |
b481de9c | 2134 | update_lq = 1; |
b481de9c | 2135 | } |
77626355 BC |
2136 | |
2137 | /* Either way, we've made a decision; modulation mode | |
2138 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 2139 | lq_sta->search_better_tbl = 0; |
77626355 | 2140 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
2141 | goto lq_update; |
2142 | } | |
2143 | ||
77626355 BC |
2144 | /* (Else) not in search of better modulation mode, try for better |
2145 | * starting rate, while staying in this mode. */ | |
bf403db8 | 2146 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
2147 | tbl->lq_type); |
2148 | low = high_low & 0xff; | |
2149 | high = (high_low >> 8) & 0xff; | |
2150 | ||
c6ec7a9b AM |
2151 | /* If user set max rate, dont allow higher than user constrain */ |
2152 | if ((lq_sta->max_rate_idx != -1) && | |
2153 | (lq_sta->max_rate_idx < high)) | |
2154 | high = IWL_RATE_INVALID; | |
2155 | ||
a5e8b505 GC |
2156 | sr = window->success_ratio; |
2157 | ||
77626355 | 2158 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 2159 | current_tpt = window->average_tpt; |
b481de9c ZY |
2160 | if (low != IWL_RATE_INVALID) |
2161 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
2162 | if (high != IWL_RATE_INVALID) |
2163 | high_tpt = tbl->win[high].average_tpt; | |
2164 | ||
a5e8b505 | 2165 | scale_action = 0; |
b481de9c | 2166 | |
77626355 | 2167 | /* Too many failures, decrease rate */ |
a5e8b505 | 2168 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
e1623446 | 2169 | IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
b481de9c | 2170 | scale_action = -1; |
77626355 BC |
2171 | |
2172 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 2173 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
2174 | (high_tpt == IWL_INVALID_VALUE)) { |
2175 | ||
2176 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
2177 | scale_action = 1; | |
2178 | else if (low != IWL_RATE_INVALID) | |
8fe72311 | 2179 | scale_action = 0; |
a5e8b505 | 2180 | } |
77626355 BC |
2181 | |
2182 | /* Both adjacent throughputs are measured, but neither one has better | |
2183 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
2184 | else if ((low_tpt != IWL_INVALID_VALUE) && |
2185 | (high_tpt != IWL_INVALID_VALUE) && | |
2186 | (low_tpt < current_tpt) && | |
2187 | (high_tpt < current_tpt)) | |
2188 | scale_action = 0; | |
77626355 BC |
2189 | |
2190 | /* At least one adjacent rate's throughput is measured, | |
2191 | * and may have better performance. */ | |
b481de9c | 2192 | else { |
77626355 | 2193 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 2194 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 2195 | /* Higher rate has better throughput */ |
a5e8b505 GC |
2196 | if (high_tpt > current_tpt && |
2197 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 2198 | scale_action = 1; |
a5e8b505 | 2199 | } else { |
8fe72311 | 2200 | scale_action = 0; |
b481de9c | 2201 | } |
77626355 BC |
2202 | |
2203 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 2204 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 2205 | /* Lower rate has better throughput */ |
b481de9c | 2206 | if (low_tpt > current_tpt) { |
e1623446 TW |
2207 | IWL_DEBUG_RATE(priv, |
2208 | "decrease rate because of low tpt\n"); | |
b481de9c | 2209 | scale_action = -1; |
a5e8b505 | 2210 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 2211 | scale_action = 1; |
a5e8b505 | 2212 | } |
b481de9c ZY |
2213 | } |
2214 | } | |
2215 | ||
77626355 BC |
2216 | /* Sanity check; asked for decrease, but success rate or throughput |
2217 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
2218 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
2219 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 2220 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c | 2221 | scale_action = 0; |
46f9381a WYG |
2222 | if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type)) |
2223 | scale_action = -1; | |
3ad3b92a | 2224 | if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI && |
46f9381a WYG |
2225 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) |
2226 | scale_action = -1; | |
b481de9c ZY |
2227 | switch (scale_action) { |
2228 | case -1: | |
77626355 | 2229 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
2230 | if (low != IWL_RATE_INVALID) { |
2231 | update_lq = 1; | |
2232 | index = low; | |
2233 | } | |
447fee70 | 2234 | |
b481de9c ZY |
2235 | break; |
2236 | case 1: | |
77626355 | 2237 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
2238 | if (high != IWL_RATE_INVALID) { |
2239 | update_lq = 1; | |
2240 | index = high; | |
2241 | } | |
2242 | ||
2243 | break; | |
2244 | case 0: | |
77626355 | 2245 | /* No change */ |
b481de9c ZY |
2246 | default: |
2247 | break; | |
2248 | } | |
2249 | ||
e1623446 | 2250 | IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
b481de9c ZY |
2251 | "high %d type %d\n", |
2252 | index, scale_action, low, high, tbl->lq_type); | |
2253 | ||
a5e8b505 | 2254 | lq_update: |
77626355 | 2255 | /* Replace uCode's rate table for the destination station. */ |
e3139fe7 WYG |
2256 | if (update_lq) |
2257 | rate = rs_update_rate_tbl(priv, lq_sta, | |
2258 | tbl, index, is_green); | |
77626355 | 2259 | |
3ad3b92a | 2260 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) { |
46f9381a WYG |
2261 | /* Should we stay with this modulation mode, |
2262 | * or search for a new one? */ | |
2263 | rs_stay_in_table(lq_sta); | |
2264 | } | |
77626355 BC |
2265 | /* |
2266 | * Search for new modulation mode if we're: | |
2267 | * 1) Not changing rates right now | |
2268 | * 2) Not just finishing up a search | |
2269 | * 3) Allowing a new search | |
2270 | */ | |
47cfd463 | 2271 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 2272 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 2273 | lq_sta->last_tpt = current_tpt; |
b481de9c | 2274 | |
77626355 BC |
2275 | /* Select a new "search" modulation mode to try. |
2276 | * If one is found, set up the new "search" table. */ | |
b481de9c | 2277 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 2278 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2279 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 2280 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
584a0f00 WYG |
2281 | else if (is_mimo2(tbl->lq_type)) |
2282 | rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); | |
b481de9c | 2283 | else |
584a0f00 | 2284 | rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2285 | |
77626355 | 2286 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2287 | if (lq_sta->search_better_tbl) { |
77626355 | 2288 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2289 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2290 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2291 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2292 | ||
77626355 | 2293 | /* Use new "search" start rate */ |
e7d326ac | 2294 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2295 | |
e1623446 | 2296 | IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
39e88504 | 2297 | tbl->current_rate, index); |
07bc28ed | 2298 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 2299 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
447fee70 MA |
2300 | } else |
2301 | done_search = 1; | |
2302 | } | |
b481de9c | 2303 | |
447fee70 | 2304 | if (done_search && !lq_sta->stay_in_tbl) { |
77626355 BC |
2305 | /* If the "active" (non-search) mode was legacy, |
2306 | * and we've tried switching antennas, | |
2307 | * but we haven't been able to try HT modes (not available), | |
2308 | * stay with best antenna legacy modulation for a while | |
2309 | * before next round of mode comparisons. */ | |
c33104f0 | 2310 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
de27e64e | 2311 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && |
d6e93399 | 2312 | lq_sta->action_counter > tbl1->max_search) { |
e1623446 | 2313 | IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
bf403db8 | 2314 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2315 | } |
2316 | ||
77626355 BC |
2317 | /* If we're in an HT mode, and all 3 mode switch actions |
2318 | * have been tried and compared, stay in this best modulation | |
2319 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 | 2320 | if (lq_sta->enable_counter && |
46f9381a WYG |
2321 | (lq_sta->action_counter >= tbl1->max_search) && |
2322 | iwl_ht_enabled(priv)) { | |
0c11b4de RR |
2323 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2324 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2325 | (tid != MAX_TID_COUNT)) { | |
86b4766b WYG |
2326 | tid_data = |
2327 | &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
2328 | if (tid_data->agg.state == IWL_AGG_OFF) { | |
2329 | IWL_DEBUG_RATE(priv, | |
2330 | "try to aggregate tid %d\n", | |
2331 | tid); | |
2332 | rs_tl_turn_on_agg(priv, tid, | |
2333 | lq_sta, sta); | |
2334 | } | |
b481de9c | 2335 | } |
bf403db8 | 2336 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2337 | } |
b481de9c ZY |
2338 | } |
2339 | ||
2340 | out: | |
978785a3 | 2341 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
b481de9c | 2342 | i = index; |
b7e35008 | 2343 | lq_sta->last_txrate_idx = i; |
b481de9c | 2344 | |
b481de9c ZY |
2345 | return; |
2346 | } | |
2347 | ||
2348 | ||
c79dd5b5 | 2349 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2350 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2351 | struct ieee80211_sta *sta, |
2352 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2353 | { |
e227ceac | 2354 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2355 | int rate_idx; |
aade00ce | 2356 | int i; |
39e88504 | 2357 | u32 rate; |
b261793d | 2358 | u8 use_green = rs_use_green(sta, &priv->current_ht_config); |
aade00ce GC |
2359 | u8 active_tbl = 0; |
2360 | u8 valid_tx_ant; | |
b481de9c | 2361 | |
4b7679a5 | 2362 | if (!sta || !lq_sta) |
b481de9c ZY |
2363 | goto out; |
2364 | ||
b7e35008 | 2365 | i = lq_sta->last_txrate_idx; |
b481de9c | 2366 | |
c33104f0 | 2367 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2368 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2369 | goto out; |
2370 | ||
aade00ce GC |
2371 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2372 | ||
c33104f0 TW |
2373 | if (!lq_sta->search_better_tbl) |
2374 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2375 | else |
c33104f0 | 2376 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2377 | |
c33104f0 | 2378 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2379 | |
2380 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2381 | i = 0; | |
2382 | ||
1826dcc0 | 2383 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2384 | tbl->ant_type = first_antenna(valid_tx_ant); |
2385 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2386 | |
2387 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2388 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2389 | |
39e88504 | 2390 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2391 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2392 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2393 | |
978785a3 | 2394 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2395 | tbl->current_rate = rate; |
eecd6e57 | 2396 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2397 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2398 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2399 | out: |
2400 | return; | |
2401 | } | |
2402 | ||
e6a9854b JB |
2403 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2404 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2405 | { |
2406 | ||
e6a9854b JB |
2407 | struct sk_buff *skb = txrc->skb; |
2408 | struct ieee80211_supported_band *sband = txrc->sband; | |
4b7679a5 JB |
2409 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2410 | struct ieee80211_conf *conf = &priv->hw->conf; | |
7869b0ea | 2411 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
b481de9c | 2412 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e6a9854b | 2413 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2414 | struct iwl_lq_sta *lq_sta = priv_sta; |
2415 | int rate_idx; | |
b481de9c | 2416 | |
e1623446 | 2417 | IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2418 | |
c6ec7a9b AM |
2419 | /* Get max rate if user set max rate */ |
2420 | if (lq_sta) { | |
2421 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2422 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2423 | (lq_sta->max_rate_idx != -1)) | |
2424 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2425 | if ((lq_sta->max_rate_idx < 0) || | |
2426 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2427 | lq_sta->max_rate_idx = -1; | |
2428 | } | |
2429 | ||
514d65c1 | 2430 | /* Send management frames and NO_ACK data using lowest rate. */ |
4c6d4f5c | 2431 | if (rate_control_send_low(sta, priv_sta, txrc)) |
4b7679a5 | 2432 | return; |
b481de9c | 2433 | |
417f114b | 2434 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2435 | |
05c914fe | 2436 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2437 | !lq_sta->ibss_sta_added) { |
c587de0b | 2438 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
b481de9c ZY |
2439 | |
2440 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2441 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", |
e174961c | 2442 | hdr->addr1); |
c587de0b | 2443 | sta_id = iwl_add_station(priv, hdr->addr1, |
7869b0ea | 2444 | false, CMD_ASYNC, ht_cap); |
b481de9c ZY |
2445 | } |
2446 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2447 | lq_sta->lq.sta_id = sta_id; |
2448 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2449 | lq_sta->ibss_sta_added = 1; | |
4b7679a5 | 2450 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c | 2451 | } |
b481de9c ZY |
2452 | } |
2453 | ||
a9c146b3 | 2454 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { |
417f114b | 2455 | rate_idx -= IWL_FIRST_OFDM_RATE; |
a9c146b3 WYG |
2456 | /* 6M and 9M shared same MCS index */ |
2457 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; | |
2458 | if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2459 | IWL_RATE_MIMO3_6M_PLCP) | |
2460 | rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM); | |
2461 | else if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2462 | IWL_RATE_MIMO2_6M_PLCP) | |
2463 | rate_idx = rate_idx + MCS_INDEX_PER_STREAM; | |
2464 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; | |
2465 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2466 | info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI; | |
2467 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) | |
2468 | info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA; | |
7aafef1c | 2469 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
a9c146b3 WYG |
2470 | info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2471 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) | |
2472 | info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
2473 | } else { | |
5027309b DH |
2474 | /* Check for invalid rates */ |
2475 | if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) || | |
2476 | ((sband->band == IEEE80211_BAND_5GHZ) && | |
2477 | (rate_idx < IWL_FIRST_OFDM_RATE))) | |
a9c146b3 | 2478 | rate_idx = rate_lowest_index(sband, sta); |
5027309b | 2479 | /* On valid 5 GHz rate, adjust index */ |
a9c146b3 WYG |
2480 | else if (sband->band == IEEE80211_BAND_5GHZ) |
2481 | rate_idx -= IWL_FIRST_OFDM_RATE; | |
7ebaeff8 | 2482 | info->control.rates[0].flags = 0; |
a9c146b3 | 2483 | } |
417f114b | 2484 | info->control.rates[0].idx = rate_idx; |
a9c146b3 | 2485 | |
b481de9c ZY |
2486 | } |
2487 | ||
4b7679a5 JB |
2488 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2489 | gfp_t gfp) | |
b481de9c | 2490 | { |
e227ceac | 2491 | struct iwl_lq_sta *lq_sta; |
8d9698b3 | 2492 | struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv; |
bf403db8 | 2493 | struct iwl_priv *priv; |
b481de9c | 2494 | |
bf403db8 | 2495 | priv = (struct iwl_priv *)priv_rate; |
e1623446 | 2496 | IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
b481de9c | 2497 | |
8d9698b3 | 2498 | lq_sta = &sta_priv->lq_sta; |
b481de9c | 2499 | |
c33104f0 | 2500 | return lq_sta; |
b481de9c ZY |
2501 | } |
2502 | ||
4b7679a5 JB |
2503 | static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, |
2504 | struct ieee80211_sta *sta, void *priv_sta) | |
b481de9c ZY |
2505 | { |
2506 | int i, j; | |
4b7679a5 JB |
2507 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2508 | struct ieee80211_conf *conf = &priv->hw->conf; | |
7869b0ea | 2509 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac | 2510 | struct iwl_lq_sta *lq_sta = priv_sta; |
b481de9c | 2511 | |
5ad13f8c RC |
2512 | lq_sta->lq.sta_id = 0xff; |
2513 | ||
2514 | for (j = 0; j < LQ_SIZE; j++) | |
2515 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
2516 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); | |
2517 | ||
c33104f0 | 2518 | lq_sta->flush_timer = 0; |
4b7679a5 | 2519 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2520 | for (j = 0; j < LQ_SIZE; j++) |
2521 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2522 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2523 | |
e1623446 | 2524 | IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2525 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2526 | * the lowest or the highest rate.. Could consider using RSSI from | |
2527 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2528 | * after assoc.. */ | |
2529 | ||
c33104f0 | 2530 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2531 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
c587de0b | 2532 | u8 sta_id = iwl_find_station(priv, |
e11bc028 | 2533 | sta->addr); |
0795af57 | 2534 | |
b481de9c | 2535 | /* for IBSS the call are from tasklet */ |
e1623446 | 2536 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
b481de9c ZY |
2537 | |
2538 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2539 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
c587de0b | 2540 | sta_id = iwl_add_station(priv, sta->addr, false, |
7869b0ea | 2541 | CMD_ASYNC, ht_cap); |
b481de9c ZY |
2542 | } |
2543 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2544 | lq_sta->lq.sta_id = sta_id; |
2545 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2546 | } |
2547 | /* FIXME: this is w/a remove it later */ | |
2548 | priv->assoc_station_added = 1; | |
2549 | } | |
2550 | ||
c33104f0 | 2551 | lq_sta->is_dup = 0; |
c6ec7a9b | 2552 | lq_sta->max_rate_idx = -1; |
7d049e5a | 2553 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; |
b261793d | 2554 | lq_sta->is_green = rs_use_green(sta, &priv->current_ht_config); |
39e88504 | 2555 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2556 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2557 | lq_sta->band = priv->band; |
77626355 BC |
2558 | /* |
2559 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2560 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2561 | */ | |
7869b0ea DH |
2562 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; |
2563 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2564 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2565 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2566 | |
77626355 | 2567 | /* Same here */ |
7869b0ea DH |
2568 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; |
2569 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2570 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2571 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2572 | ||
7869b0ea DH |
2573 | lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1; |
2574 | lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2575 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2576 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2577 | ||
e1623446 | 2578 | IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2579 | lq_sta->active_siso_rate, |
fde0db31 GC |
2580 | lq_sta->active_mimo2_rate, |
2581 | lq_sta->active_mimo3_rate); | |
2582 | ||
a96a27f9 | 2583 | /* These values will be overridden later */ |
07bc28ed GC |
2584 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; |
2585 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2586 | ||
0c11b4de RR |
2587 | /* as default allow aggregation for all tids */ |
2588 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2589 | lq_sta->drv = priv; |
b481de9c | 2590 | |
5027309b DH |
2591 | /* Set last_txrate_idx to lowest rate */ |
2592 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2593 | if (sband->band == IEEE80211_BAND_5GHZ) | |
2594 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
e3949d62 | 2595 | lq_sta->is_agg = 0; |
d5e49036 | 2596 | |
4b7679a5 | 2597 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2598 | } |
2599 | ||
46f9381a | 2600 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 2601 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2602 | { |
e227ceac | 2603 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2604 | int index = 0; |
b481de9c | 2605 | int rate_idx; |
1b696de2 | 2606 | int repeat_rate = 0; |
aade00ce | 2607 | u8 ant_toggle_cnt = 0; |
b481de9c | 2608 | u8 use_ht_possible = 1; |
aade00ce | 2609 | u8 valid_tx_ant = 0; |
07bc28ed | 2610 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2611 | |
77626355 | 2612 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2613 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2614 | |
39e88504 | 2615 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2616 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2617 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2618 | &tbl_type, &rate_idx); |
2619 | ||
77626355 | 2620 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2621 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2622 | ant_toggle_cnt = 1; |
1b696de2 | 2623 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2624 | } else { |
1b696de2 | 2625 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2626 | } |
b481de9c ZY |
2627 | |
2628 | lq_cmd->general_params.mimo_delimiter = | |
2629 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2630 | |
2631 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2632 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2633 | |
07bc28ed GC |
2634 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2635 | lq_cmd->general_params.single_stream_ant_msk = | |
2636 | tbl_type.ant_type; | |
2637 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2638 | lq_cmd->general_params.dual_stream_ant_msk = | |
2639 | tbl_type.ant_type; | |
2640 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2641 | |
2642 | index++; | |
1b696de2 | 2643 | repeat_rate--; |
b481de9c | 2644 | |
aade00ce GC |
2645 | if (priv) |
2646 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2647 | ||
77626355 | 2648 | /* Fill rest of rate table */ |
b481de9c | 2649 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2650 | /* Repeat initial/next rate. |
2651 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2652 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2653 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2654 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2655 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2656 | ant_toggle_cnt++; | |
2657 | else if (priv && | |
2658 | rs_toggle_antenna(valid_tx_ant, | |
2659 | &new_rate, &tbl_type)) | |
2660 | ant_toggle_cnt = 1; | |
2661 | } | |
98d7e09a | 2662 | |
77626355 | 2663 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2664 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2665 | |
2666 | /* Fill next table entry */ | |
b481de9c | 2667 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2668 | cpu_to_le32(new_rate); |
1b696de2 | 2669 | repeat_rate--; |
b481de9c ZY |
2670 | index++; |
2671 | } | |
2672 | ||
39e88504 | 2673 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2674 | &rate_idx); |
2675 | ||
77626355 BC |
2676 | /* Indicate to uCode which entries might be MIMO. |
2677 | * If initial rate was MIMO, this will finally end up | |
2678 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2679 | if (is_mimo(tbl_type.lq_type)) |
2680 | lq_cmd->general_params.mimo_delimiter = index; | |
2681 | ||
77626355 | 2682 | /* Get next rate */ |
39e88504 GC |
2683 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2684 | use_ht_possible); | |
b481de9c | 2685 | |
77626355 | 2686 | /* How many times should we repeat the next rate? */ |
b481de9c | 2687 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2688 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2689 | ant_toggle_cnt++; | |
2690 | else if (priv && | |
2691 | rs_toggle_antenna(valid_tx_ant, | |
2692 | &new_rate, &tbl_type)) | |
2693 | ant_toggle_cnt = 1; | |
2694 | ||
1b696de2 | 2695 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2696 | } else { |
1b696de2 | 2697 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2698 | } |
b481de9c | 2699 | |
77626355 BC |
2700 | /* Don't allow HT rates after next pass. |
2701 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2702 | use_ht_possible = 0; |
2703 | ||
77626355 | 2704 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2705 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2706 | |
2707 | /* Fill next table entry */ | |
39e88504 | 2708 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2709 | |
2710 | index++; | |
1b696de2 | 2711 | repeat_rate--; |
b481de9c ZY |
2712 | } |
2713 | ||
4d80d721 | 2714 | lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; |
13c33a09 WYG |
2715 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; |
2716 | lq_cmd->agg_params.agg_time_limit = | |
2717 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
b481de9c ZY |
2718 | } |
2719 | ||
4b7679a5 | 2720 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2721 | { |
4b7679a5 | 2722 | return hw->priv; |
b481de9c ZY |
2723 | } |
2724 | /* rate scale requires free function to be implemented */ | |
2725 | static void rs_free(void *priv_rate) | |
2726 | { | |
2727 | return; | |
2728 | } | |
2729 | ||
4b7679a5 JB |
2730 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2731 | void *priv_sta) | |
b481de9c | 2732 | { |
45527c2c | 2733 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c | 2734 | |
e1623446 | 2735 | IWL_DEBUG_RATE(priv, "enter\n"); |
e1623446 | 2736 | IWL_DEBUG_RATE(priv, "leave\n"); |
b481de9c ZY |
2737 | } |
2738 | ||
2739 | ||
93dc646a | 2740 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2741 | static int open_file_generic(struct inode *inode, struct file *file) |
2742 | { | |
2743 | file->private_data = inode->i_private; | |
2744 | return 0; | |
2745 | } | |
e227ceac TW |
2746 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2747 | u32 *rate_n_flags, int index) | |
98d7e09a | 2748 | { |
bf403db8 | 2749 | struct iwl_priv *priv; |
3c4955f8 WYG |
2750 | u8 valid_tx_ant; |
2751 | u8 ant_sel_tx; | |
bf403db8 EK |
2752 | |
2753 | priv = lq_sta->drv; | |
3c4955f8 | 2754 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
39e88504 | 2755 | if (lq_sta->dbg_fixed_rate) { |
3c4955f8 WYG |
2756 | ant_sel_tx = |
2757 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
2758 | >> RATE_MCS_ANT_POS); | |
2759 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
39e88504 | 2760 | *rate_n_flags = lq_sta->dbg_fixed_rate; |
3c4955f8 | 2761 | IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
39e88504 | 2762 | } else { |
3c4955f8 WYG |
2763 | lq_sta->dbg_fixed_rate = 0; |
2764 | IWL_ERR(priv, | |
2765 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
2766 | ant_sel_tx, valid_tx_ant); | |
2767 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); | |
39e88504 | 2768 | } |
39e88504 | 2769 | } else { |
e1623446 | 2770 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
98d7e09a | 2771 | } |
98d7e09a | 2772 | } |
5ae212c9 | 2773 | |
98d7e09a ZY |
2774 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2775 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2776 | { | |
e227ceac | 2777 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2778 | struct iwl_priv *priv; |
98d7e09a ZY |
2779 | char buf[64]; |
2780 | int buf_size; | |
2781 | u32 parsed_rate; | |
2782 | ||
bf403db8 | 2783 | priv = lq_sta->drv; |
98d7e09a ZY |
2784 | memset(buf, 0, sizeof(buf)); |
2785 | buf_size = min(count, sizeof(buf) - 1); | |
2786 | if (copy_from_user(buf, user_buf, buf_size)) | |
2787 | return -EFAULT; | |
2788 | ||
2789 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2790 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2791 | else |
39e88504 | 2792 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2793 | |
39e88504 GC |
2794 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2795 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2796 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2797 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a | 2798 | |
e1623446 | 2799 | IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
39e88504 | 2800 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2801 | |
39e88504 | 2802 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2803 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2804 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2805 | } |
2806 | ||
2807 | return count; | |
2808 | } | |
0209dc11 | 2809 | |
5ae212c9 ZY |
2810 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2811 | char __user *user_buf, size_t count, loff_t *ppos) | |
2812 | { | |
a412c804 | 2813 | char *buff; |
5ae212c9 ZY |
2814 | int desc = 0; |
2815 | int i = 0; | |
12b96817 | 2816 | int index = 0; |
a412c804 | 2817 | ssize_t ret; |
5ae212c9 | 2818 | |
e227ceac | 2819 | struct iwl_lq_sta *lq_sta = file->private_data; |
d8ae4f52 | 2820 | struct iwl_priv *priv; |
adb7b5e6 | 2821 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
5ae212c9 | 2822 | |
d8ae4f52 | 2823 | priv = lq_sta->drv; |
a412c804 FS |
2824 | buff = kmalloc(1024, GFP_KERNEL); |
2825 | if (!buff) | |
2826 | return -ENOMEM; | |
2827 | ||
c33104f0 | 2828 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2829 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2830 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2831 | lq_sta->active_legacy_rate); |
98d7e09a | 2832 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2833 | lq_sta->dbg_fixed_rate); |
d8ae4f52 WYG |
2834 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
2835 | (priv->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", | |
2836 | (priv->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2837 | (priv->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
adb7b5e6 WYG |
2838 | desc += sprintf(buff+desc, "lq type %s\n", |
2839 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
2840 | if (is_Ht(tbl->lq_type)) { | |
2841 | desc += sprintf(buff+desc, " %s", | |
2842 | (is_siso(tbl->lq_type)) ? "SISO" : | |
2843 | ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); | |
2844 | desc += sprintf(buff+desc, " %s", | |
7aafef1c | 2845 | (tbl->is_ht40) ? "40MHz" : "20MHz"); |
e3949d62 DH |
2846 | desc += sprintf(buff+desc, " %s %s %s\n", (tbl->is_SGI) ? "SGI" : "", |
2847 | (lq_sta->is_green) ? "GF enabled" : "", | |
2848 | (lq_sta->is_agg) ? "AGG on" : ""); | |
adb7b5e6 | 2849 | } |
12b96817 WYG |
2850 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", |
2851 | lq_sta->last_rate_n_flags); | |
5ae212c9 ZY |
2852 | desc += sprintf(buff+desc, "general:" |
2853 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2854 | lq_sta->lq.general_params.flags, |
2855 | lq_sta->lq.general_params.mimo_delimiter, | |
2856 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2857 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2858 | |
2859 | desc += sprintf(buff+desc, "agg:" | |
2860 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2861 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2862 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2863 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2864 | |
2865 | desc += sprintf(buff+desc, | |
2866 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2867 | lq_sta->lq.general_params.start_rate_index[0], |
2868 | lq_sta->lq.general_params.start_rate_index[1], | |
2869 | lq_sta->lq.general_params.start_rate_index[2], | |
2870 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 | 2871 | |
12b96817 WYG |
2872 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
2873 | index = iwl_hwrate_to_plcp_idx( | |
2874 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); | |
2875 | if (is_legacy(tbl->lq_type)) { | |
2876 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
2877 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2878 | iwl_rate_mcs[index].mbps); | |
2879 | } else { | |
2880 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", | |
2881 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2882 | iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); | |
2883 | } | |
2884 | } | |
5ae212c9 | 2885 | |
a412c804 FS |
2886 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2887 | kfree(buff); | |
2888 | return ret; | |
5ae212c9 ZY |
2889 | } |
2890 | ||
2891 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2892 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2893 | .read = rs_sta_dbgfs_scale_table_read, |
2894 | .open = open_file_generic, | |
2895 | }; | |
0209dc11 ZY |
2896 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2897 | char __user *user_buf, size_t count, loff_t *ppos) | |
2898 | { | |
a412c804 | 2899 | char *buff; |
0209dc11 ZY |
2900 | int desc = 0; |
2901 | int i, j; | |
a412c804 | 2902 | ssize_t ret; |
0209dc11 | 2903 | |
e227ceac | 2904 | struct iwl_lq_sta *lq_sta = file->private_data; |
a412c804 FS |
2905 | |
2906 | buff = kmalloc(1024, GFP_KERNEL); | |
2907 | if (!buff) | |
2908 | return -ENOMEM; | |
2909 | ||
0209dc11 | 2910 | for (i = 0; i < LQ_SIZE; i++) { |
7aafef1c WYG |
2911 | desc += sprintf(buff+desc, |
2912 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
0209dc11 | 2913 | "rate=0x%X\n", |
c3056065 | 2914 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
2915 | lq_sta->lq_info[i].lq_type, |
2916 | lq_sta->lq_info[i].is_SGI, | |
7aafef1c | 2917 | lq_sta->lq_info[i].is_ht40, |
c33104f0 | 2918 | lq_sta->lq_info[i].is_dup, |
2681b20b | 2919 | lq_sta->is_green, |
39e88504 | 2920 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2921 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2922 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2923 | "counter=%d success=%d %%=%d\n", |
2924 | lq_sta->lq_info[i].win[j].counter, | |
2925 | lq_sta->lq_info[i].win[j].success_counter, | |
2926 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2927 | } |
2928 | } | |
a412c804 FS |
2929 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2930 | kfree(buff); | |
2931 | return ret; | |
0209dc11 ZY |
2932 | } |
2933 | ||
2934 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2935 | .read = rs_sta_dbgfs_stats_table_read, | |
2936 | .open = open_file_generic, | |
2937 | }; | |
5ae212c9 | 2938 | |
38167459 WYG |
2939 | static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
2940 | char __user *user_buf, size_t count, loff_t *ppos) | |
2941 | { | |
2942 | char buff[120]; | |
2943 | int desc = 0; | |
2944 | ssize_t ret; | |
2945 | ||
2946 | struct iwl_lq_sta *lq_sta = file->private_data; | |
2947 | struct iwl_priv *priv; | |
2948 | struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; | |
2949 | ||
2950 | priv = lq_sta->drv; | |
2951 | ||
2952 | if (is_Ht(tbl->lq_type)) | |
2953 | desc += sprintf(buff+desc, | |
2954 | "Bit Rate= %d Mb/s\n", | |
2955 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
2956 | else | |
2957 | desc += sprintf(buff+desc, | |
2958 | "Bit Rate= %d Mb/s\n", | |
2959 | iwl_rates[lq_sta->last_txrate_idx].ieee >> 1); | |
2960 | desc += sprintf(buff+desc, | |
2961 | "Signal Level= %d dBm\tNoise Level= %d dBm\n", | |
2962 | priv->last_rx_rssi, priv->last_rx_noise); | |
2963 | desc += sprintf(buff+desc, | |
2964 | "Tsf= 0x%llx\tBeacon time= 0x%08X\n", | |
2965 | priv->last_tsf, priv->last_beacon_time); | |
2966 | ||
2967 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2968 | return ret; | |
2969 | } | |
2970 | ||
2971 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
2972 | .read = rs_sta_dbgfs_rate_scale_data_read, | |
2973 | .open = open_file_generic, | |
2974 | }; | |
2975 | ||
93dc646a ZY |
2976 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2977 | struct dentry *dir) | |
2978 | { | |
e227ceac | 2979 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2980 | lq_sta->rs_sta_dbgfs_scale_table_file = |
43e85115 | 2981 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
c33104f0 TW |
2982 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2983 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
43e85115 | 2984 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, |
c33104f0 | 2985 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
38167459 | 2986 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = |
43e85115 | 2987 | debugfs_create_file("rate_scale_data", S_IRUSR, dir, |
38167459 | 2988 | lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); |
0c11b4de | 2989 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
43e85115 | 2990 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, |
0c11b4de | 2991 | &lq_sta->tx_agg_tid_en); |
0c11b4de | 2992 | |
93dc646a ZY |
2993 | } |
2994 | ||
2995 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2996 | { | |
e227ceac | 2997 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2998 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2999 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
38167459 | 3000 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); |
0c11b4de | 3001 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
3002 | } |
3003 | #endif | |
3004 | ||
b481de9c ZY |
3005 | static struct rate_control_ops rs_ops = { |
3006 | .module = NULL, | |
3007 | .name = RS_NAME, | |
3008 | .tx_status = rs_tx_status, | |
3009 | .get_rate = rs_get_rate, | |
3010 | .rate_init = rs_rate_init, | |
b481de9c ZY |
3011 | .alloc = rs_alloc, |
3012 | .free = rs_free, | |
3013 | .alloc_sta = rs_alloc_sta, | |
3014 | .free_sta = rs_free_sta, | |
93dc646a ZY |
3015 | #ifdef CONFIG_MAC80211_DEBUGFS |
3016 | .add_sta_debugfs = rs_add_debugfs, | |
3017 | .remove_sta_debugfs = rs_remove_debugfs, | |
3018 | #endif | |
b481de9c ZY |
3019 | }; |
3020 | ||
e227ceac | 3021 | int iwlagn_rate_control_register(void) |
b481de9c | 3022 | { |
897e1cf2 | 3023 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
3024 | } |
3025 | ||
e227ceac | 3026 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
3027 | { |
3028 | ieee80211_rate_control_unregister(&rs_ops); | |
3029 | } | |
3030 |