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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 | ||
82ca9341 | 298 | static int 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 | { |
82ca9341 | 302 | int ret = -EAGAIN; |
2411054a | 303 | u32 load = rs_tl_get_load(lq_data, tid); |
45d42700 | 304 | |
2411054a | 305 | if (load > IWL_AGG_LOAD_THRESHOLD) { |
e1623446 | 306 | IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
e174961c | 307 | sta->addr, tid); |
45d42700 WYG |
308 | ret = ieee80211_start_tx_ba_session(sta, tid); |
309 | if (ret == -EAGAIN) { | |
310 | /* | |
311 | * driver and mac80211 is out of sync | |
312 | * this might be cause by reloading firmware | |
313 | * stop the tx ba session here | |
314 | */ | |
2411054a | 315 | IWL_ERR(priv, "Fail start Tx agg on tid: %d\n", |
45d42700 | 316 | tid); |
6a8579d0 | 317 | ieee80211_stop_tx_ba_session(sta, tid); |
45d42700 | 318 | } |
2411054a AL |
319 | } else { |
320 | IWL_ERR(priv, "Aggregation not enabled for tid %d " | |
321 | "because load = %u\n", tid, load); | |
322 | } | |
82ca9341 | 323 | return ret; |
0c11b4de RR |
324 | } |
325 | ||
c79dd5b5 | 326 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 327 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 328 | struct ieee80211_sta *sta) |
0c11b4de | 329 | { |
cfecc6b4 WYG |
330 | if (tid < TID_MAX_LOAD_COUNT) |
331 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
332 | else | |
333 | IWL_ERR(priv, "tid exceeds max load count: %d/%d\n", | |
334 | tid, TID_MAX_LOAD_COUNT); | |
0c11b4de RR |
335 | } |
336 | ||
39e88504 | 337 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 338 | { |
3ac7f146 TW |
339 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
340 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
341 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
342 | } |
343 | ||
04f2dec1 SZ |
344 | /* |
345 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
346 | * that wraps a NULL pointer check | |
347 | */ | |
348 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
349 | { | |
350 | if (tbl->expected_tpt) | |
351 | return tbl->expected_tpt[rs_index]; | |
352 | return 0; | |
353 | } | |
354 | ||
77626355 BC |
355 | /** |
356 | * rs_collect_tx_data - Update the success/failure sliding window | |
357 | * | |
358 | * We keep a sliding window of the last 62 packets transmitted | |
359 | * at this rate. window->data contains the bitmask of successful | |
360 | * packets. | |
361 | */ | |
04f2dec1 SZ |
362 | static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl, |
363 | int scale_index, int attempts, int successes) | |
b481de9c | 364 | { |
e227ceac | 365 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 366 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
04f2dec1 | 367 | s32 fail_count, tpt; |
b481de9c | 368 | |
dc2453ae TW |
369 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
370 | return -EINVAL; | |
b481de9c | 371 | |
e3949d62 | 372 | /* Select window for current tx bit rate */ |
04f2dec1 SZ |
373 | window = &(tbl->win[scale_index]); |
374 | ||
375 | /* Get expected throughput */ | |
376 | tpt = get_expected_tpt(tbl, scale_index); | |
b481de9c | 377 | |
77626355 BC |
378 | /* |
379 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
380 | * history window; anything older isn't really relevant any more. | |
381 | * If we have filled up the sliding window, drop the oldest attempt; | |
382 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
383 | * subtract "1" from the success counter (this is the main reason | |
384 | * we keep these bitmaps!). | |
385 | */ | |
e3949d62 | 386 | while (attempts > 0) { |
39e88504 GC |
387 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
388 | ||
389 | /* remove earliest */ | |
390 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
391 | ||
99556438 RR |
392 | if (window->data & mask) { |
393 | window->data &= ~mask; | |
39e88504 | 394 | window->success_counter--; |
99556438 | 395 | } |
b481de9c | 396 | } |
b481de9c | 397 | |
99556438 RR |
398 | /* Increment frames-attempted counter */ |
399 | window->counter++; | |
400 | ||
e3949d62 | 401 | /* Shift bitmap by one frame to throw away oldest history */ |
90d7795e | 402 | window->data <<= 1; |
e3949d62 DH |
403 | |
404 | /* Mark the most recent #successes attempts as successful */ | |
99556438 | 405 | if (successes > 0) { |
39e88504 | 406 | window->success_counter++; |
99556438 RR |
407 | window->data |= 0x1; |
408 | successes--; | |
409 | } | |
77626355 | 410 | |
e3949d62 | 411 | attempts--; |
b481de9c ZY |
412 | } |
413 | ||
77626355 | 414 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
415 | if (window->counter > 0) |
416 | window->success_ratio = 128 * (100 * window->success_counter) | |
417 | / window->counter; | |
418 | else | |
419 | window->success_ratio = IWL_INVALID_VALUE; | |
420 | ||
421 | fail_count = window->counter - window->success_counter; | |
422 | ||
77626355 | 423 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
424 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
425 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
426 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
427 | else | |
428 | window->average_tpt = IWL_INVALID_VALUE; | |
429 | ||
77626355 | 430 | /* Tag this window as having been updated */ |
b481de9c ZY |
431 | window->stamp = jiffies; |
432 | ||
dc2453ae | 433 | return 0; |
b481de9c ZY |
434 | } |
435 | ||
77626355 BC |
436 | /* |
437 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
438 | */ | |
39e88504 | 439 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
440 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
441 | struct iwl_scale_tbl_info *tbl, | |
442 | int index, u8 use_green) | |
b481de9c | 443 | { |
39e88504 GC |
444 | u32 rate_n_flags = 0; |
445 | ||
b481de9c | 446 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 447 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 448 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 449 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 450 | |
fde0db31 GC |
451 | } else if (is_Ht(tbl->lq_type)) { |
452 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 453 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 454 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 455 | } |
39e88504 | 456 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
457 | |
458 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 459 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 460 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 461 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 462 | else |
1826dcc0 | 463 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 464 | } else { |
978785a3 | 465 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
466 | } |
467 | ||
39e88504 | 468 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 469 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 470 | |
39e88504 | 471 | if (is_Ht(tbl->lq_type)) { |
7aafef1c | 472 | if (tbl->is_ht40) { |
39e88504 GC |
473 | if (tbl->is_dup) |
474 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
475 | else | |
7aafef1c | 476 | rate_n_flags |= RATE_MCS_HT40_MSK; |
39e88504 GC |
477 | } |
478 | if (tbl->is_SGI) | |
479 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
480 | ||
481 | if (use_green) { | |
482 | rate_n_flags |= RATE_MCS_GF_MSK; | |
483 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
484 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 485 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
486 | } |
487 | } | |
b481de9c | 488 | } |
39e88504 | 489 | return rate_n_flags; |
b481de9c ZY |
490 | } |
491 | ||
77626355 BC |
492 | /* |
493 | * Interpret uCode API's rate_n_flags format, | |
494 | * fill "search" or "active" tx mode table. | |
495 | */ | |
39e88504 | 496 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 497 | enum ieee80211_band band, |
e227ceac | 498 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
499 | int *rate_idx) |
500 | { | |
39e88504 GC |
501 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
502 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
503 | u8 mcs; | |
b481de9c | 504 | |
e7d326ac | 505 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 506 | |
fde0db31 | 507 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 508 | *rate_idx = -1; |
dc2453ae | 509 | return -EINVAL; |
b481de9c | 510 | } |
77626355 | 511 | tbl->is_SGI = 0; /* default legacy setup */ |
7aafef1c | 512 | tbl->is_ht40 = 0; |
b481de9c | 513 | tbl->is_dup = 0; |
fde0db31 GC |
514 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
515 | tbl->lq_type = LQ_NONE; | |
d6e93399 | 516 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c | 517 | |
77626355 | 518 | /* legacy rate format */ |
39e88504 | 519 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 520 | if (num_of_ant == 1) { |
8318d78a | 521 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
522 | tbl->lq_type = LQ_A; |
523 | else | |
524 | tbl->lq_type = LQ_G; | |
b481de9c | 525 | } |
fde0db31 | 526 | /* HT rate format */ |
b481de9c | 527 | } else { |
39e88504 | 528 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
529 | tbl->is_SGI = 1; |
530 | ||
7aafef1c | 531 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || |
39e88504 | 532 | (rate_n_flags & RATE_MCS_DUP_MSK)) |
7aafef1c | 533 | tbl->is_ht40 = 1; |
b481de9c | 534 | |
39e88504 | 535 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 536 | tbl->is_dup = 1; |
fde0db31 | 537 | |
39e88504 | 538 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 539 | |
39e88504 GC |
540 | /* SISO */ |
541 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
542 | if (num_of_ant == 1) |
543 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
544 | /* MIMO2 */ | |
39e88504 | 545 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
546 | if (num_of_ant == 2) |
547 | tbl->lq_type = LQ_MIMO2; | |
548 | /* MIMO3 */ | |
549 | } else { | |
d6e93399 MA |
550 | if (num_of_ant == 3) { |
551 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; | |
fde0db31 | 552 | tbl->lq_type = LQ_MIMO3; |
d6e93399 | 553 | } |
fde0db31 | 554 | } |
b481de9c ZY |
555 | } |
556 | return 0; | |
557 | } | |
aade00ce GC |
558 | |
559 | /* switch to another antenna/antennas and return 1 */ | |
560 | /* if no other valid antenna found, return 0 */ | |
561 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 562 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 563 | { |
aade00ce GC |
564 | u8 new_ant_type; |
565 | ||
566 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
567 | return 0; | |
568 | ||
569 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
570 | return 0; | |
571 | ||
572 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
573 | ||
574 | while ((new_ant_type != tbl->ant_type) && | |
575 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
576 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
577 | ||
578 | if (new_ant_type == tbl->ant_type) | |
579 | return 0; | |
580 | ||
581 | tbl->ant_type = new_ant_type; | |
582 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
583 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
584 | return 1; | |
b481de9c ZY |
585 | } |
586 | ||
b261793d DH |
587 | /** |
588 | * Green-field mode is valid if the station supports it and | |
589 | * there are no non-GF stations present in the BSS. | |
590 | */ | |
591 | static inline u8 rs_use_green(struct ieee80211_sta *sta, | |
fad95bf5 | 592 | struct iwl_ht_config *ht_conf) |
b481de9c | 593 | { |
b261793d DH |
594 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
595 | !(ht_conf->non_GF_STA_present); | |
b481de9c ZY |
596 | } |
597 | ||
598 | /** | |
599 | * rs_get_supported_rates - get the available rates | |
600 | * | |
601 | * if management frame or broadcast frame only return | |
602 | * basic available rates. | |
603 | * | |
604 | */ | |
e227ceac TW |
605 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
606 | struct ieee80211_hdr *hdr, | |
607 | enum iwl_table_type rate_type) | |
b481de9c | 608 | { |
eecd6e57 GC |
609 | if (is_legacy(rate_type)) { |
610 | return lq_sta->active_legacy_rate; | |
611 | } else { | |
b481de9c | 612 | if (is_siso(rate_type)) |
eecd6e57 | 613 | return lq_sta->active_siso_rate; |
fde0db31 | 614 | else if (is_mimo2(rate_type)) |
eecd6e57 | 615 | return lq_sta->active_mimo2_rate; |
b481de9c | 616 | else |
eecd6e57 | 617 | return lq_sta->active_mimo3_rate; |
c33104f0 | 618 | } |
b481de9c ZY |
619 | } |
620 | ||
bf403db8 EK |
621 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
622 | int rate_type) | |
b481de9c ZY |
623 | { |
624 | u8 high = IWL_RATE_INVALID; | |
625 | u8 low = IWL_RATE_INVALID; | |
626 | ||
01ebd063 | 627 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
628 | * the rate table */ |
629 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
630 | int i; | |
631 | u32 mask; | |
632 | ||
633 | /* Find the previous rate that is in the rate mask */ | |
634 | i = index - 1; | |
635 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
636 | if (rate_mask & mask) { | |
637 | low = i; | |
638 | break; | |
639 | } | |
640 | } | |
641 | ||
642 | /* Find the next rate that is in the rate mask */ | |
643 | i = index + 1; | |
644 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
645 | if (rate_mask & mask) { | |
646 | high = i; | |
647 | break; | |
648 | } | |
649 | } | |
650 | ||
651 | return (high << 8) | low; | |
652 | } | |
653 | ||
654 | low = index; | |
655 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 656 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
657 | if (low == IWL_RATE_INVALID) |
658 | break; | |
659 | if (rate_mask & (1 << low)) | |
660 | break; | |
e1623446 | 661 | IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
b481de9c ZY |
662 | } |
663 | ||
664 | high = index; | |
665 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 666 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
667 | if (high == IWL_RATE_INVALID) |
668 | break; | |
669 | if (rate_mask & (1 << high)) | |
670 | break; | |
e1623446 | 671 | IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
b481de9c ZY |
672 | } |
673 | ||
674 | return (high << 8) | low; | |
675 | } | |
676 | ||
e227ceac TW |
677 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
678 | struct iwl_scale_tbl_info *tbl, | |
679 | u8 scale_index, u8 ht_possible) | |
b481de9c | 680 | { |
b481de9c ZY |
681 | s32 low; |
682 | u16 rate_mask; | |
683 | u16 high_low; | |
684 | u8 switch_to_legacy = 0; | |
c33104f0 | 685 | u8 is_green = lq_sta->is_green; |
2ff6578b | 686 | struct iwl_priv *priv = lq_sta->drv; |
b481de9c ZY |
687 | |
688 | /* check if we need to switch from HT to legacy rates. | |
689 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
690 | * are always supported (spec demand) */ | |
691 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
692 | switch_to_legacy = 1; | |
693 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 694 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
695 | tbl->lq_type = LQ_A; |
696 | else | |
697 | tbl->lq_type = LQ_G; | |
698 | ||
69fdb309 | 699 | if (num_of_ant(tbl->ant_type) > 1) |
2ff6578b WYG |
700 | tbl->ant_type = |
701 | first_antenna(priv->hw_params.valid_tx_ant); | |
b481de9c | 702 | |
7aafef1c | 703 | tbl->is_ht40 = 0; |
b481de9c | 704 | tbl->is_SGI = 0; |
d6e93399 | 705 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c ZY |
706 | } |
707 | ||
eecd6e57 | 708 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 709 | |
77626355 | 710 | /* Mask with station rate restriction */ |
b481de9c | 711 | if (is_legacy(tbl->lq_type)) { |
77626355 | 712 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 713 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 714 | rate_mask = (u16)(rate_mask & |
c33104f0 | 715 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 716 | else |
c33104f0 | 717 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
718 | } |
719 | ||
77626355 | 720 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 721 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
722 | low = scale_index; |
723 | goto out; | |
b481de9c ZY |
724 | } |
725 | ||
bf403db8 EK |
726 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
727 | tbl->lq_type); | |
b481de9c ZY |
728 | low = high_low & 0xff; |
729 | ||
39e88504 GC |
730 | if (low == IWL_RATE_INVALID) |
731 | low = scale_index; | |
732 | ||
733 | out: | |
978785a3 | 734 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
735 | } |
736 | ||
95407aa4 DH |
737 | /* |
738 | * Simple function to compare two rate scale table types | |
739 | */ | |
740 | static bool table_type_matches(struct iwl_scale_tbl_info *a, | |
741 | struct iwl_scale_tbl_info *b) | |
742 | { | |
743 | return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) && | |
744 | (a->is_SGI == b->is_SGI); | |
745 | } | |
95407aa4 | 746 | |
77626355 BC |
747 | /* |
748 | * mac80211 sends us Tx status | |
749 | */ | |
4b7679a5 JB |
750 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
751 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 752 | struct sk_buff *skb) |
b481de9c | 753 | { |
95407aa4 DH |
754 | int legacy_success; |
755 | int retries; | |
756 | int rs_index, mac_index, i; | |
417f114b | 757 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 758 | struct iwl_link_quality_cmd *table; |
b481de9c | 759 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 | 760 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
e039fa4a | 761 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5027309b | 762 | enum mac80211_rate_control_flags mac_flags; |
39e88504 | 763 | u32 tx_rate; |
e227ceac | 764 | struct iwl_scale_tbl_info tbl_type; |
04f2dec1 | 765 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
b481de9c | 766 | |
e1623446 | 767 | IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
b481de9c | 768 | |
fe6b23dd RC |
769 | /* Treat uninitialized rate scaling data same as non-existing. */ |
770 | if (!lq_sta) { | |
771 | IWL_DEBUG_RATE(priv, "Station rate scaling not created yet.\n"); | |
772 | return; | |
773 | } else if (!lq_sta->drv) { | |
774 | IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); | |
775 | return; | |
776 | } | |
777 | ||
417f114b | 778 | if (!ieee80211_is_data(hdr->frame_control) || |
514d65c1 | 779 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c ZY |
780 | return; |
781 | ||
e3949d62 | 782 | /* This packet was aggregated but doesn't carry status info */ |
e039fa4a JB |
783 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
784 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
785 | return; |
786 | ||
77626355 BC |
787 | /* |
788 | * Ignore this Tx frame response if its initial rate doesn't match | |
789 | * that of latest Link Quality command. There may be stragglers | |
790 | * from a previous Link Quality command, but we're no longer interested | |
791 | * in those; they're either from the "active" mode while we're trying | |
792 | * to check "search" mode, or a prior "search" mode after we've moved | |
793 | * to a new "search" mode (which might become the new "active" mode). | |
794 | */ | |
95407aa4 | 795 | table = &lq_sta->lq; |
39e88504 GC |
796 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
797 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
798 | if (priv->band == IEEE80211_BAND_5GHZ) |
799 | rs_index -= IWL_FIRST_OFDM_RATE; | |
5027309b DH |
800 | mac_flags = info->status.rates[0].flags; |
801 | mac_index = info->status.rates[0].idx; | |
31513be8 DH |
802 | /* For HT packets, map MCS to PLCP */ |
803 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
804 | mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ | |
805 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
806 | mac_index++; | |
392a0baf DH |
807 | /* |
808 | * mac80211 HT index is always zero-indexed; we need to move | |
809 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
810 | */ | |
811 | if (priv->band == IEEE80211_BAND_2GHZ) | |
812 | mac_index += IWL_FIRST_OFDM_RATE; | |
31513be8 | 813 | } |
95407aa4 | 814 | /* Here we actually compare this rate to the latest LQ command */ |
5027309b DH |
815 | if ((mac_index < 0) || |
816 | (tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || | |
817 | (tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
818 | (tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) || | |
e6a9854b | 819 | (tbl_type.ant_type != info->antenna_sel_tx) || |
5027309b DH |
820 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) || |
821 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
31513be8 DH |
822 | (rs_index != mac_index)) { |
823 | IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate); | |
95407aa4 DH |
824 | /* |
825 | * Since rates mis-match, the last LQ command may have failed. | |
826 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
827 | * ... driver. | |
d5e49036 | 828 | */ |
7d049e5a AM |
829 | lq_sta->missed_rate_counter++; |
830 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
831 | lq_sta->missed_rate_counter = 0; | |
fe6b23dd | 832 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC, false); |
7d049e5a | 833 | } |
95407aa4 DH |
834 | /* Regardless, ignore this status info for outdated rate */ |
835 | return; | |
836 | } else | |
837 | /* Rate did match, so reset the missed_rate_counter */ | |
838 | lq_sta->missed_rate_counter = 0; | |
839 | ||
840 | /* Figure out if rate scale algorithm is in active or search table */ | |
841 | if (table_type_matches(&tbl_type, | |
842 | &(lq_sta->lq_info[lq_sta->active_tbl]))) { | |
843 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
844 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
845 | } else if (table_type_matches(&tbl_type, | |
846 | &lq_sta->lq_info[1 - lq_sta->active_tbl])) { | |
847 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
848 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
849 | } else { | |
850 | IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n"); | |
851 | return; | |
b481de9c ZY |
852 | } |
853 | ||
95407aa4 DH |
854 | /* |
855 | * Updating the frame history depends on whether packets were | |
856 | * aggregated. | |
857 | * | |
858 | * For aggregation, all packets were transmitted at the same rate, the | |
859 | * first index into rate scale table. | |
860 | */ | |
861 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
862 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
863 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, | |
864 | &rs_index); | |
04f2dec1 | 865 | rs_collect_tx_data(curr_tbl, rs_index, |
e3a3cd87 DH |
866 | info->status.ampdu_len, |
867 | info->status.ampdu_ack_len); | |
95407aa4 DH |
868 | |
869 | /* Update success/fail counts if not searching for new mode */ | |
870 | if (lq_sta->stay_in_tbl) { | |
e3a3cd87 DH |
871 | lq_sta->total_success += info->status.ampdu_ack_len; |
872 | lq_sta->total_failed += (info->status.ampdu_len - | |
873 | info->status.ampdu_ack_len); | |
b481de9c | 874 | } |
95407aa4 | 875 | } else { |
77626355 | 876 | /* |
95407aa4 | 877 | * For legacy, update frame history with for each Tx retry. |
77626355 | 878 | */ |
95407aa4 DH |
879 | retries = info->status.rates[0].count - 1; |
880 | /* HW doesn't send more than 15 retries */ | |
881 | retries = min(retries, 15); | |
882 | ||
883 | /* The last transmission may have been successful */ | |
884 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
885 | /* Collect data for each rate used during failed TX attempts */ | |
886 | for (i = 0; i <= retries; ++i) { | |
887 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
888 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
889 | &tbl_type, &rs_index); | |
890 | /* | |
891 | * Only collect stats if retried rate is in the same RS | |
892 | * table as active/search. | |
893 | */ | |
894 | if (table_type_matches(&tbl_type, curr_tbl)) | |
04f2dec1 | 895 | tmp_tbl = curr_tbl; |
95407aa4 | 896 | else if (table_type_matches(&tbl_type, other_tbl)) |
04f2dec1 | 897 | tmp_tbl = other_tbl; |
95407aa4 DH |
898 | else |
899 | continue; | |
04f2dec1 SZ |
900 | rs_collect_tx_data(tmp_tbl, rs_index, 1, |
901 | i < retries ? 0 : legacy_success); | |
95407aa4 DH |
902 | } |
903 | ||
904 | /* Update success/fail counts if not searching for new mode */ | |
905 | if (lq_sta->stay_in_tbl) { | |
906 | lq_sta->total_success += legacy_success; | |
907 | lq_sta->total_failed += retries + (1 - legacy_success); | |
99556438 | 908 | } |
b481de9c | 909 | } |
95407aa4 DH |
910 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ |
911 | lq_sta->last_rate_n_flags = tx_rate; | |
b481de9c | 912 | |
77626355 | 913 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c | 914 | if (sta && sta->supp_rates[sband->band]) |
514d65c1 | 915 | rs_rate_scale_perform(priv, skb, sta, lq_sta); |
b481de9c ZY |
916 | } |
917 | ||
77626355 BC |
918 | /* |
919 | * Begin a period of staying with a selected modulation mode. | |
920 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
921 | * Set frame tx success limits according to legacy vs. high-throughput, | |
922 | * and reset overall (spanning all rates) tx success history statistics. | |
923 | * These control how long we stay using same modulation mode before | |
924 | * searching for a new mode. | |
925 | */ | |
bf403db8 | 926 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 927 | struct iwl_lq_sta *lq_sta) |
b481de9c | 928 | { |
e1623446 | 929 | IWL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
c33104f0 | 930 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 931 | if (is_legacy) { |
c33104f0 TW |
932 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
933 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
934 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 935 | } else { |
c33104f0 TW |
936 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
937 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
938 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 939 | } |
c33104f0 TW |
940 | lq_sta->table_count = 0; |
941 | lq_sta->total_failed = 0; | |
942 | lq_sta->total_success = 0; | |
447fee70 | 943 | lq_sta->flush_timer = jiffies; |
d6e93399 | 944 | lq_sta->action_counter = 0; |
b481de9c ZY |
945 | } |
946 | ||
77626355 BC |
947 | /* |
948 | * Find correct throughput table for given mode of modulation | |
949 | */ | |
e227ceac TW |
950 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
951 | struct iwl_scale_tbl_info *tbl) | |
b481de9c | 952 | { |
e3949d62 DH |
953 | /* Used to choose among HT tables */ |
954 | s32 (*ht_tbl_pointer)[IWL_RATE_COUNT]; | |
955 | ||
956 | /* Check for invalid LQ type */ | |
957 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
958 | tbl->expected_tpt = expected_tpt_legacy; | |
959 | return; | |
960 | } | |
961 | ||
962 | /* Legacy rates have only one table */ | |
b481de9c | 963 | if (is_legacy(tbl->lq_type)) { |
e3949d62 DH |
964 | tbl->expected_tpt = expected_tpt_legacy; |
965 | return; | |
966 | } | |
967 | ||
968 | /* Choose among many HT tables depending on number of streams | |
969 | * (SISO/MIMO2/MIMO3), channel width (20/40), SGI, and aggregation | |
970 | * status */ | |
971 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
972 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
973 | else if (is_siso(tbl->lq_type)) | |
974 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
975 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
976 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
977 | else if (is_mimo2(tbl->lq_type)) | |
978 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
979 | else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
980 | ht_tbl_pointer = expected_tpt_mimo3_20MHz; | |
981 | else /* if (is_mimo3(tbl->lq_type)) <-- must be true */ | |
982 | ht_tbl_pointer = expected_tpt_mimo3_40MHz; | |
983 | ||
984 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ | |
985 | tbl->expected_tpt = ht_tbl_pointer[0]; | |
986 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
987 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
988 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
989 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
990 | else /* AGG+SGI */ | |
991 | tbl->expected_tpt = ht_tbl_pointer[3]; | |
b481de9c ZY |
992 | } |
993 | ||
77626355 BC |
994 | /* |
995 | * Find starting rate for new "search" high-throughput mode of modulation. | |
996 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
997 | * above the current measured throughput of "active" mode, to give new mode | |
998 | * a fair chance to prove itself without too many challenges. | |
999 | * | |
1000 | * This gets called when transitioning to more aggressive modulation | |
1001 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1002 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1003 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1004 | * bit rate will typically need to increase, but not if performance was bad. | |
1005 | */ | |
c79dd5b5 | 1006 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1007 | struct iwl_lq_sta *lq_sta, |
1008 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1009 | u16 rate_mask, s8 index) |
b481de9c | 1010 | { |
77626355 | 1011 | /* "active" values */ |
e227ceac | 1012 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1013 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1014 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1015 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1016 | |
1017 | /* expected "search" throughput */ | |
1018 | s32 *tpt_tbl = tbl->expected_tpt; | |
1019 | ||
1020 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1021 | u16 high_low; |
f935a6da | 1022 | s8 rate = index; |
b481de9c ZY |
1023 | |
1024 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1025 | ||
1026 | for (; ;) { | |
bf403db8 EK |
1027 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1028 | tbl->lq_type); | |
b481de9c ZY |
1029 | |
1030 | low = high_low & 0xff; | |
1031 | high = (high_low >> 8) & 0xff; | |
1032 | ||
77626355 BC |
1033 | /* |
1034 | * Lower the "search" bit rate, to give new "search" mode | |
1035 | * approximately the same throughput as "active" if: | |
1036 | * | |
1037 | * 1) "Active" mode has been working modestly well (but not | |
1038 | * great), and expected "search" throughput (under perfect | |
1039 | * conditions) at candidate rate is above the actual | |
1040 | * measured "active" throughput (but less than expected | |
1041 | * "active" throughput under perfect conditions). | |
1042 | * OR | |
1043 | * 2) "Active" mode has been working perfectly or very well | |
1044 | * and expected "search" throughput (under perfect | |
1045 | * conditions) at candidate rate is above expected | |
1046 | * "active" throughput (under perfect conditions). | |
1047 | */ | |
c33104f0 | 1048 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1049 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1050 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1051 | (tpt_tbl[rate] <= active_tpt))) || | |
1052 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1053 | (tpt_tbl[rate] > active_tpt))) { | |
1054 | ||
77626355 BC |
1055 | /* (2nd or later pass) |
1056 | * If we've already tried to raise the rate, and are | |
1057 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1058 | if (start_hi != IWL_RATE_INVALID) { |
1059 | new_rate = start_hi; | |
1060 | break; | |
1061 | } | |
77626355 | 1062 | |
b481de9c | 1063 | new_rate = rate; |
77626355 BC |
1064 | |
1065 | /* Loop again with lower rate */ | |
b481de9c ZY |
1066 | if (low != IWL_RATE_INVALID) |
1067 | rate = low; | |
77626355 BC |
1068 | |
1069 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1070 | else |
1071 | break; | |
77626355 BC |
1072 | |
1073 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1074 | } else { |
77626355 BC |
1075 | /* (2nd or later pass) |
1076 | * If we've already tried to lower the rate, and are | |
1077 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1078 | if (new_rate != IWL_RATE_INVALID) |
1079 | break; | |
77626355 BC |
1080 | |
1081 | /* Loop again with higher rate */ | |
b481de9c ZY |
1082 | else if (high != IWL_RATE_INVALID) { |
1083 | start_hi = high; | |
1084 | rate = high; | |
77626355 BC |
1085 | |
1086 | /* Higher rate not available, use the original */ | |
b481de9c | 1087 | } else { |
90d7795e | 1088 | new_rate = rate; |
b481de9c ZY |
1089 | break; |
1090 | } | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | return new_rate; | |
1095 | } | |
b481de9c | 1096 | |
77626355 | 1097 | /* |
584a0f00 | 1098 | * Set up search table for MIMO2 |
77626355 | 1099 | */ |
fde0db31 | 1100 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1101 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1102 | struct ieee80211_conf *conf, |
4b7679a5 | 1103 | struct ieee80211_sta *sta, |
e227ceac | 1104 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1105 | { |
b481de9c ZY |
1106 | u16 rate_mask; |
1107 | s32 rate; | |
c33104f0 | 1108 | s8 is_green = lq_sta->is_green; |
b481de9c | 1109 | |
de27e64e | 1110 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1111 | return -1; |
1112 | ||
d9fe60de | 1113 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1114 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1115 | return -1; |
1116 | ||
77626355 | 1117 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1118 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1119 | return -1; |
1120 | ||
e1623446 | 1121 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1122 | |
1123 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1124 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1125 | tbl->action = 0; |
d6e93399 | 1126 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 GC |
1127 | rate_mask = lq_sta->active_mimo2_rate; |
1128 | ||
7aafef1c WYG |
1129 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1130 | tbl->is_ht40 = 1; | |
b481de9c | 1131 | else |
7aafef1c | 1132 | tbl->is_ht40 = 0; |
b481de9c | 1133 | |
eecd6e57 | 1134 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1135 | |
f935a6da | 1136 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1137 | |
e1623446 | 1138 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
584a0f00 WYG |
1139 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
1140 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", | |
1141 | rate, rate_mask); | |
1142 | return -1; | |
1143 | } | |
1144 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); | |
1145 | ||
1146 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", | |
1147 | tbl->current_rate, is_green); | |
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | * Set up search table for MIMO3 | |
1153 | */ | |
1154 | static int rs_switch_to_mimo3(struct iwl_priv *priv, | |
1155 | struct iwl_lq_sta *lq_sta, | |
1156 | struct ieee80211_conf *conf, | |
1157 | struct ieee80211_sta *sta, | |
1158 | struct iwl_scale_tbl_info *tbl, int index) | |
1159 | { | |
1160 | u16 rate_mask; | |
1161 | s32 rate; | |
1162 | s8 is_green = lq_sta->is_green; | |
1163 | ||
1164 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1165 | return -1; | |
1166 | ||
1167 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) | |
1168 | == WLAN_HT_CAP_SM_PS_STATIC) | |
1169 | return -1; | |
1170 | ||
1171 | /* Need both Tx chains/antennas to support MIMO */ | |
1172 | if (priv->hw_params.tx_chains_num < 3) | |
1173 | return -1; | |
1174 | ||
1175 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); | |
1176 | ||
1177 | tbl->lq_type = LQ_MIMO3; | |
1178 | tbl->is_dup = lq_sta->is_dup; | |
1179 | tbl->action = 0; | |
d6e93399 | 1180 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; |
584a0f00 WYG |
1181 | rate_mask = lq_sta->active_mimo3_rate; |
1182 | ||
7aafef1c WYG |
1183 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1184 | tbl->is_ht40 = 1; | |
584a0f00 | 1185 | else |
7aafef1c | 1186 | tbl->is_ht40 = 0; |
39e88504 | 1187 | |
584a0f00 WYG |
1188 | rs_set_expected_tpt_table(lq_sta, tbl); |
1189 | ||
1190 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); | |
1191 | ||
1192 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n", | |
1193 | rate, rate_mask); | |
39e88504 | 1194 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1195 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
39e88504 | 1196 | rate, rate_mask); |
b481de9c | 1197 | return -1; |
39e88504 | 1198 | } |
978785a3 | 1199 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
b481de9c | 1200 | |
e1623446 | 1201 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1202 | tbl->current_rate, is_green); |
dc2453ae | 1203 | return 0; |
fde0db31 | 1204 | } |
b481de9c | 1205 | |
77626355 BC |
1206 | /* |
1207 | * Set up search table for SISO | |
1208 | */ | |
c79dd5b5 | 1209 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1210 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1211 | struct ieee80211_conf *conf, |
4b7679a5 | 1212 | struct ieee80211_sta *sta, |
e227ceac | 1213 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1214 | { |
b481de9c | 1215 | u16 rate_mask; |
c33104f0 | 1216 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1217 | s32 rate; |
1218 | ||
de27e64e | 1219 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1220 | return -1; |
1221 | ||
e1623446 | 1222 | IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n"); |
39e88504 | 1223 | |
c33104f0 | 1224 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1225 | tbl->lq_type = LQ_SISO; |
1226 | tbl->action = 0; | |
d6e93399 | 1227 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 | 1228 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1229 | |
7aafef1c WYG |
1230 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1231 | tbl->is_ht40 = 1; | |
b481de9c | 1232 | else |
7aafef1c | 1233 | tbl->is_ht40 = 0; |
b481de9c | 1234 | |
b481de9c | 1235 | if (is_green) |
39e88504 | 1236 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1237 | |
eecd6e57 | 1238 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1239 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1240 | |
e1623446 | 1241 | IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1242 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1243 | IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1244 | rate, rate_mask); |
1245 | return -1; | |
1246 | } | |
978785a3 | 1247 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
e1623446 | 1248 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1249 | tbl->current_rate, is_green); |
403ab56b | 1250 | return 0; |
b481de9c ZY |
1251 | } |
1252 | ||
77626355 BC |
1253 | /* |
1254 | * Try to switch to new modulation mode from legacy | |
1255 | */ | |
c79dd5b5 | 1256 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1257 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1258 | struct ieee80211_conf *conf, |
4b7679a5 | 1259 | struct ieee80211_sta *sta, |
b481de9c ZY |
1260 | int index) |
1261 | { | |
e227ceac TW |
1262 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1263 | struct iwl_scale_tbl_info *search_tbl = | |
1264 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1265 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1266 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1267 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1268 | u8 start_action = tbl->action; |
fde0db31 | 1269 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1270 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1271 | int ret = 0; |
d6e93399 | 1272 | u8 update_search_tbl_counter = 0; |
b481de9c | 1273 | |
46f9381a WYG |
1274 | if (!iwl_ht_enabled(priv)) |
1275 | /* stay in Legacy */ | |
1276 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
3ad3b92a | 1277 | else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1278 | tbl->action > IWL_LEGACY_SWITCH_SISO) |
1279 | tbl->action = IWL_LEGACY_SWITCH_SISO; | |
b481de9c | 1280 | for (; ;) { |
d6e93399 | 1281 | lq_sta->action_counter++; |
b481de9c | 1282 | switch (tbl->action) { |
3110bef7 GC |
1283 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1284 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
e1623446 | 1285 | IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
b481de9c | 1286 | |
3110bef7 GC |
1287 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1288 | tx_chains_num <= 1) || | |
1289 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1290 | tx_chains_num <= 2)) | |
1291 | break; | |
1292 | ||
77626355 | 1293 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1294 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1295 | break; | |
77626355 | 1296 | |
77626355 | 1297 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1298 | memcpy(search_tbl, tbl, sz); |
1299 | ||
aade00ce GC |
1300 | if (rs_toggle_antenna(valid_tx_ant, |
1301 | &search_tbl->current_rate, search_tbl)) { | |
d6e93399 | 1302 | update_search_tbl_counter = 1; |
3110bef7 | 1303 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1304 | goto out; |
1305 | } | |
a5e8b505 | 1306 | break; |
b481de9c | 1307 | case IWL_LEGACY_SWITCH_SISO: |
e1623446 | 1308 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
77626355 BC |
1309 | |
1310 | /* Set up search table to try SISO */ | |
b481de9c | 1311 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1312 | search_tbl->is_SGI = 0; |
c33104f0 | 1313 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1314 | search_tbl, index); |
dc2453ae | 1315 | if (!ret) { |
c33104f0 | 1316 | lq_sta->action_counter = 0; |
b481de9c | 1317 | goto out; |
dc2453ae | 1318 | } |
b481de9c ZY |
1319 | |
1320 | break; | |
3110bef7 GC |
1321 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1322 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1323 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
e1623446 | 1324 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1325 | |
1326 | /* Set up search table to try MIMO */ | |
b481de9c | 1327 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1328 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1329 | |
1330 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1331 | search_tbl->ant_type = ANT_AB; | |
1332 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1333 | search_tbl->ant_type = ANT_AC; | |
1334 | else | |
1335 | search_tbl->ant_type = ANT_BC; | |
1336 | ||
1337 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1338 | break; | |
1339 | ||
fde0db31 | 1340 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1341 | search_tbl, index); |
dc2453ae | 1342 | if (!ret) { |
c33104f0 | 1343 | lq_sta->action_counter = 0; |
b481de9c | 1344 | goto out; |
dc2453ae | 1345 | } |
b481de9c | 1346 | break; |
584a0f00 WYG |
1347 | |
1348 | case IWL_LEGACY_SWITCH_MIMO3_ABC: | |
1349 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); | |
1350 | ||
1351 | /* Set up search table to try MIMO3 */ | |
1352 | memcpy(search_tbl, tbl, sz); | |
1353 | search_tbl->is_SGI = 0; | |
1354 | ||
1355 | search_tbl->ant_type = ANT_ABC; | |
1356 | ||
1357 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1358 | break; | |
1359 | ||
1360 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1361 | search_tbl, index); | |
1362 | if (!ret) { | |
1363 | lq_sta->action_counter = 0; | |
1364 | goto out; | |
1365 | } | |
1366 | break; | |
b481de9c ZY |
1367 | } |
1368 | tbl->action++; | |
584a0f00 | 1369 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1370 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
b481de9c ZY |
1371 | |
1372 | if (tbl->action == start_action) | |
1373 | break; | |
1374 | ||
1375 | } | |
3110bef7 | 1376 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1377 | return 0; |
1378 | ||
3110bef7 GC |
1379 | out: |
1380 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1381 | tbl->action++; |
584a0f00 | 1382 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1383 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
d6e93399 MA |
1384 | if (update_search_tbl_counter) |
1385 | search_tbl->action = tbl->action; | |
b481de9c ZY |
1386 | return 0; |
1387 | ||
1388 | } | |
1389 | ||
77626355 BC |
1390 | /* |
1391 | * Try to switch to new modulation mode from SISO | |
1392 | */ | |
c79dd5b5 | 1393 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1394 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1395 | struct ieee80211_conf *conf, |
4b7679a5 | 1396 | struct ieee80211_sta *sta, int index) |
b481de9c | 1397 | { |
c33104f0 | 1398 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1399 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1400 | struct iwl_scale_tbl_info *search_tbl = | |
1401 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1402 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1403 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1404 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1405 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1406 | u8 start_action = tbl->action; |
fde0db31 | 1407 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1408 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
d6e93399 | 1409 | u8 update_search_tbl_counter = 0; |
fde0db31 | 1410 | int ret; |
b481de9c | 1411 | |
3ad3b92a | 1412 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1413 | tbl->action > IWL_SISO_SWITCH_ANTENNA2) { |
1414 | /* stay in SISO */ | |
1415 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; | |
1416 | } | |
b481de9c | 1417 | for (;;) { |
c33104f0 | 1418 | lq_sta->action_counter++; |
b481de9c | 1419 | switch (tbl->action) { |
3110bef7 GC |
1420 | case IWL_SISO_SWITCH_ANTENNA1: |
1421 | case IWL_SISO_SWITCH_ANTENNA2: | |
e1623446 | 1422 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1423 | |
1424 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1425 | tx_chains_num <= 1) || | |
1426 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1427 | tx_chains_num <= 2)) | |
1428 | break; | |
1429 | ||
b481de9c ZY |
1430 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1431 | break; | |
b481de9c ZY |
1432 | |
1433 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1434 | if (rs_toggle_antenna(valid_tx_ant, |
d6e93399 MA |
1435 | &search_tbl->current_rate, search_tbl)) { |
1436 | update_search_tbl_counter = 1; | |
aade00ce | 1437 | goto out; |
d6e93399 | 1438 | } |
a5e8b505 | 1439 | break; |
3110bef7 GC |
1440 | case IWL_SISO_SWITCH_MIMO2_AB: |
1441 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1442 | case IWL_SISO_SWITCH_MIMO2_BC: | |
e1623446 | 1443 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
b481de9c | 1444 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1445 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1446 | |
1447 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1448 | search_tbl->ant_type = ANT_AB; | |
1449 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1450 | search_tbl->ant_type = ANT_AC; | |
1451 | else | |
1452 | search_tbl->ant_type = ANT_BC; | |
1453 | ||
1454 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1455 | break; | |
1456 | ||
fde0db31 | 1457 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1458 | search_tbl, index); |
3110bef7 | 1459 | if (!ret) |
b481de9c ZY |
1460 | goto out; |
1461 | break; | |
1462 | case IWL_SISO_SWITCH_GI: | |
28e6f489 DH |
1463 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1464 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1465 | break; |
28e6f489 DH |
1466 | if (tbl->is_ht40 && !(ht_cap->cap & |
1467 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1468 | break; |
1469 | ||
e1623446 | 1470 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1471 | |
b481de9c | 1472 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1473 | if (is_green) { |
1474 | if (!tbl->is_SGI) | |
1475 | break; | |
1476 | else | |
15b1687c WT |
1477 | IWL_ERR(priv, |
1478 | "SGI was set in GF+SISO\n"); | |
b481de9c | 1479 | } |
39e88504 | 1480 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1481 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1482 | if (tbl->is_SGI) { |
1483 | s32 tpt = lq_sta->last_tpt / 100; | |
1484 | if (tpt >= search_tbl->expected_tpt[index]) | |
1485 | break; | |
1486 | } | |
978785a3 TW |
1487 | search_tbl->current_rate = |
1488 | rate_n_flags_from_tbl(priv, search_tbl, | |
1489 | index, is_green); | |
d6e93399 | 1490 | update_search_tbl_counter = 1; |
b481de9c | 1491 | goto out; |
584a0f00 WYG |
1492 | case IWL_SISO_SWITCH_MIMO3_ABC: |
1493 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); | |
1494 | memcpy(search_tbl, tbl, sz); | |
1495 | search_tbl->is_SGI = 0; | |
1496 | search_tbl->ant_type = ANT_ABC; | |
1497 | ||
1498 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1499 | break; | |
1500 | ||
1501 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1502 | search_tbl, index); | |
1503 | if (!ret) | |
1504 | goto out; | |
1505 | break; | |
b481de9c ZY |
1506 | } |
1507 | tbl->action++; | |
584a0f00 | 1508 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1509 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1510 | |
1511 | if (tbl->action == start_action) | |
1512 | break; | |
1513 | } | |
3110bef7 | 1514 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1515 | return 0; |
1516 | ||
1517 | out: | |
3110bef7 | 1518 | lq_sta->search_better_tbl = 1; |
b481de9c | 1519 | tbl->action++; |
584a0f00 | 1520 | if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC) |
3110bef7 | 1521 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
d6e93399 MA |
1522 | if (update_search_tbl_counter) |
1523 | search_tbl->action = tbl->action; | |
1524 | ||
b481de9c ZY |
1525 | return 0; |
1526 | } | |
1527 | ||
77626355 | 1528 | /* |
584a0f00 | 1529 | * Try to switch to new modulation mode from MIMO2 |
77626355 | 1530 | */ |
584a0f00 | 1531 | static int rs_move_mimo2_to_other(struct iwl_priv *priv, |
e227ceac | 1532 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1533 | struct ieee80211_conf *conf, |
4b7679a5 | 1534 | struct ieee80211_sta *sta, int index) |
b481de9c | 1535 | { |
c33104f0 | 1536 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1537 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1538 | struct iwl_scale_tbl_info *search_tbl = | |
1539 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1540 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
28e6f489 | 1541 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1542 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1543 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1544 | u8 start_action = tbl->action; |
3110bef7 GC |
1545 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1546 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
d6e93399 | 1547 | u8 update_search_tbl_counter = 0; |
aade00ce | 1548 | int ret; |
b481de9c | 1549 | |
3ad3b92a | 1550 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1551 | (tbl->action < IWL_MIMO2_SWITCH_SISO_A || |
1552 | tbl->action > IWL_MIMO2_SWITCH_SISO_C)) { | |
1553 | /* switch in SISO */ | |
1554 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1555 | } | |
b481de9c | 1556 | for (;;) { |
c33104f0 | 1557 | lq_sta->action_counter++; |
b481de9c | 1558 | switch (tbl->action) { |
3110bef7 GC |
1559 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1560 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
584a0f00 | 1561 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); |
3110bef7 GC |
1562 | |
1563 | if (tx_chains_num <= 2) | |
1564 | break; | |
1565 | ||
1566 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1567 | break; | |
1568 | ||
1569 | memcpy(search_tbl, tbl, sz); | |
1570 | if (rs_toggle_antenna(valid_tx_ant, | |
d6e93399 MA |
1571 | &search_tbl->current_rate, search_tbl)) { |
1572 | update_search_tbl_counter = 1; | |
3110bef7 | 1573 | goto out; |
d6e93399 | 1574 | } |
3110bef7 GC |
1575 | break; |
1576 | case IWL_MIMO2_SWITCH_SISO_A: | |
1577 | case IWL_MIMO2_SWITCH_SISO_B: | |
1578 | case IWL_MIMO2_SWITCH_SISO_C: | |
e1623446 | 1579 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1580 | |
77626355 | 1581 | /* Set up new search table for SISO */ |
b481de9c | 1582 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1583 | |
3110bef7 | 1584 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1585 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1586 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1587 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1588 | else |
1589 | search_tbl->ant_type = ANT_C; | |
1590 | ||
1591 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1592 | break; | |
b481de9c | 1593 | |
c33104f0 | 1594 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1595 | search_tbl, index); |
3110bef7 | 1596 | if (!ret) |
b481de9c | 1597 | goto out; |
3110bef7 | 1598 | |
b481de9c ZY |
1599 | break; |
1600 | ||
3110bef7 | 1601 | case IWL_MIMO2_SWITCH_GI: |
28e6f489 DH |
1602 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1603 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1604 | break; |
28e6f489 DH |
1605 | if (tbl->is_ht40 && !(ht_cap->cap & |
1606 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1607 | break; |
1608 | ||
584a0f00 | 1609 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); |
77626355 | 1610 | |
584a0f00 | 1611 | /* Set up new search table for MIMO2 */ |
b481de9c | 1612 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1613 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1614 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1615 | /* |
1616 | * If active table already uses the fastest possible | |
1617 | * modulation (dual stream with short guard interval), | |
1618 | * and it's working well, there's no need to look | |
1619 | * for a better type of modulation! | |
1620 | */ | |
39e88504 | 1621 | if (tbl->is_SGI) { |
c33104f0 | 1622 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1623 | if (tpt >= search_tbl->expected_tpt[index]) |
1624 | break; | |
b481de9c | 1625 | } |
978785a3 TW |
1626 | search_tbl->current_rate = |
1627 | rate_n_flags_from_tbl(priv, search_tbl, | |
1628 | index, is_green); | |
d6e93399 | 1629 | update_search_tbl_counter = 1; |
b481de9c ZY |
1630 | goto out; |
1631 | ||
584a0f00 WYG |
1632 | case IWL_MIMO2_SWITCH_MIMO3_ABC: |
1633 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); | |
1634 | memcpy(search_tbl, tbl, sz); | |
1635 | search_tbl->is_SGI = 0; | |
1636 | search_tbl->ant_type = ANT_ABC; | |
1637 | ||
1638 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1639 | break; | |
1640 | ||
1641 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1642 | search_tbl, index); | |
1643 | if (!ret) | |
1644 | goto out; | |
1645 | ||
1646 | break; | |
b481de9c ZY |
1647 | } |
1648 | tbl->action++; | |
584a0f00 | 1649 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1650 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
b481de9c ZY |
1651 | |
1652 | if (tbl->action == start_action) | |
1653 | break; | |
1654 | } | |
3110bef7 | 1655 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1656 | return 0; |
1657 | out: | |
3110bef7 | 1658 | lq_sta->search_better_tbl = 1; |
b481de9c | 1659 | tbl->action++; |
584a0f00 | 1660 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1661 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
d6e93399 MA |
1662 | if (update_search_tbl_counter) |
1663 | search_tbl->action = tbl->action; | |
1664 | ||
b481de9c ZY |
1665 | return 0; |
1666 | ||
1667 | } | |
1668 | ||
584a0f00 WYG |
1669 | /* |
1670 | * Try to switch to new modulation mode from MIMO3 | |
1671 | */ | |
1672 | static int rs_move_mimo3_to_other(struct iwl_priv *priv, | |
1673 | struct iwl_lq_sta *lq_sta, | |
1674 | struct ieee80211_conf *conf, | |
1675 | struct ieee80211_sta *sta, int index) | |
1676 | { | |
1677 | s8 is_green = lq_sta->is_green; | |
1678 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1679 | struct iwl_scale_tbl_info *search_tbl = | |
1680 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1681 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1682 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
584a0f00 WYG |
1683 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1684 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1685 | u8 start_action = tbl->action; | |
1686 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; | |
1687 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
1688 | int ret; | |
d6e93399 | 1689 | u8 update_search_tbl_counter = 0; |
584a0f00 | 1690 | |
3ad3b92a | 1691 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1692 | (tbl->action < IWL_MIMO3_SWITCH_SISO_A || |
1693 | tbl->action > IWL_MIMO3_SWITCH_SISO_C)) { | |
1694 | /* switch in SISO */ | |
1695 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; | |
1696 | } | |
584a0f00 WYG |
1697 | for (;;) { |
1698 | lq_sta->action_counter++; | |
1699 | switch (tbl->action) { | |
1700 | case IWL_MIMO3_SWITCH_ANTENNA1: | |
1701 | case IWL_MIMO3_SWITCH_ANTENNA2: | |
1702 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); | |
1703 | ||
1704 | if (tx_chains_num <= 3) | |
1705 | break; | |
1706 | ||
1707 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1708 | break; | |
1709 | ||
1710 | memcpy(search_tbl, tbl, sz); | |
1711 | if (rs_toggle_antenna(valid_tx_ant, | |
1712 | &search_tbl->current_rate, search_tbl)) | |
1713 | goto out; | |
1714 | break; | |
1715 | case IWL_MIMO3_SWITCH_SISO_A: | |
1716 | case IWL_MIMO3_SWITCH_SISO_B: | |
1717 | case IWL_MIMO3_SWITCH_SISO_C: | |
1718 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); | |
1719 | ||
1720 | /* Set up new search table for SISO */ | |
1721 | memcpy(search_tbl, tbl, sz); | |
1722 | ||
1723 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) | |
1724 | search_tbl->ant_type = ANT_A; | |
1725 | else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) | |
1726 | search_tbl->ant_type = ANT_B; | |
1727 | else | |
1728 | search_tbl->ant_type = ANT_C; | |
1729 | ||
1730 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1731 | break; | |
1732 | ||
1733 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, | |
1734 | search_tbl, index); | |
1735 | if (!ret) | |
1736 | goto out; | |
1737 | ||
1738 | break; | |
1739 | ||
1740 | case IWL_MIMO3_SWITCH_MIMO2_AB: | |
1741 | case IWL_MIMO3_SWITCH_MIMO2_AC: | |
1742 | case IWL_MIMO3_SWITCH_MIMO2_BC: | |
1743 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); | |
1744 | ||
1745 | memcpy(search_tbl, tbl, sz); | |
1746 | search_tbl->is_SGI = 0; | |
1747 | if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) | |
1748 | search_tbl->ant_type = ANT_AB; | |
1749 | else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) | |
1750 | search_tbl->ant_type = ANT_AC; | |
1751 | else | |
1752 | search_tbl->ant_type = ANT_BC; | |
1753 | ||
1754 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1755 | break; | |
1756 | ||
1757 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
1758 | search_tbl, index); | |
1759 | if (!ret) | |
1760 | goto out; | |
1761 | ||
1762 | break; | |
1763 | ||
1764 | case IWL_MIMO3_SWITCH_GI: | |
28e6f489 DH |
1765 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1766 | IEEE80211_HT_CAP_SGI_20)) | |
584a0f00 | 1767 | break; |
28e6f489 DH |
1768 | if (tbl->is_ht40 && !(ht_cap->cap & |
1769 | IEEE80211_HT_CAP_SGI_40)) | |
584a0f00 WYG |
1770 | break; |
1771 | ||
1772 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); | |
1773 | ||
1774 | /* Set up new search table for MIMO */ | |
1775 | memcpy(search_tbl, tbl, sz); | |
1776 | search_tbl->is_SGI = !tbl->is_SGI; | |
1777 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1778 | /* | |
1779 | * If active table already uses the fastest possible | |
1780 | * modulation (dual stream with short guard interval), | |
1781 | * and it's working well, there's no need to look | |
1782 | * for a better type of modulation! | |
1783 | */ | |
1784 | if (tbl->is_SGI) { | |
1785 | s32 tpt = lq_sta->last_tpt / 100; | |
1786 | if (tpt >= search_tbl->expected_tpt[index]) | |
1787 | break; | |
1788 | } | |
1789 | search_tbl->current_rate = | |
1790 | rate_n_flags_from_tbl(priv, search_tbl, | |
1791 | index, is_green); | |
d6e93399 | 1792 | update_search_tbl_counter = 1; |
584a0f00 WYG |
1793 | goto out; |
1794 | } | |
1795 | tbl->action++; | |
1796 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1797 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
1798 | ||
1799 | if (tbl->action == start_action) | |
1800 | break; | |
1801 | } | |
1802 | search_tbl->lq_type = LQ_NONE; | |
1803 | return 0; | |
1804 | out: | |
1805 | lq_sta->search_better_tbl = 1; | |
1806 | tbl->action++; | |
1807 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1808 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
d6e93399 MA |
1809 | if (update_search_tbl_counter) |
1810 | search_tbl->action = tbl->action; | |
1811 | ||
584a0f00 WYG |
1812 | return 0; |
1813 | ||
1814 | } | |
1815 | ||
77626355 BC |
1816 | /* |
1817 | * Check whether we should continue using same modulation mode, or | |
1818 | * begin search for a new mode, based on: | |
1819 | * 1) # tx successes or failures while using this mode | |
1820 | * 2) # times calling this function | |
1821 | * 3) elapsed time in this mode (not used, for now) | |
1822 | */ | |
e227ceac | 1823 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1824 | { |
e227ceac | 1825 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1826 | int i; |
1827 | int active_tbl; | |
1828 | int flush_interval_passed = 0; | |
bf403db8 | 1829 | struct iwl_priv *priv; |
b481de9c | 1830 | |
bf403db8 | 1831 | priv = lq_sta->drv; |
c33104f0 | 1832 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1833 | |
c33104f0 | 1834 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1835 | |
77626355 | 1836 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1837 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1838 | |
77626355 | 1839 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1840 | if (lq_sta->flush_timer) |
b481de9c | 1841 | flush_interval_passed = |
447fee70 MA |
1842 | time_after(jiffies, |
1843 | (unsigned long)(lq_sta->flush_timer + | |
b481de9c ZY |
1844 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1845 | ||
77626355 BC |
1846 | /* |
1847 | * Check if we should allow search for new modulation mode. | |
1848 | * If many frames have failed or succeeded, or we've used | |
1849 | * this same modulation for a long time, allow search, and | |
1850 | * reset history stats that keep track of whether we should | |
1851 | * allow a new search. Also (below) reset all bitmaps and | |
1852 | * stats in active history. | |
1853 | */ | |
c33104f0 TW |
1854 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1855 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1856 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1857 | && (flush_interval_passed))) { |
e1623446 | 1858 | IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1859 | lq_sta->total_failed, |
1860 | lq_sta->total_success, | |
b481de9c | 1861 | flush_interval_passed); |
77626355 BC |
1862 | |
1863 | /* Allow search for new mode */ | |
c33104f0 TW |
1864 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1865 | lq_sta->total_failed = 0; | |
1866 | lq_sta->total_success = 0; | |
1867 | lq_sta->flush_timer = 0; | |
77626355 BC |
1868 | |
1869 | /* | |
1870 | * Else if we've used this modulation mode enough repetitions | |
1871 | * (regardless of elapsed time or success/failure), reset | |
1872 | * history bitmaps and rate-specific stats for all rates in | |
1873 | * active table. | |
1874 | */ | |
403ab56b | 1875 | } else { |
c33104f0 TW |
1876 | lq_sta->table_count++; |
1877 | if (lq_sta->table_count >= | |
1878 | lq_sta->table_count_limit) { | |
1879 | lq_sta->table_count = 0; | |
b481de9c | 1880 | |
e1623446 | 1881 | IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
b481de9c ZY |
1882 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1883 | rs_rate_scale_clear_window( | |
1884 | &(tbl->win[i])); | |
1885 | } | |
1886 | } | |
1887 | ||
77626355 BC |
1888 | /* If transitioning to allow "search", reset all history |
1889 | * bitmaps and stats in active table (this will become the new | |
1890 | * "search" table). */ | |
c33104f0 | 1891 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1892 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1893 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1894 | } | |
1895 | } | |
1896 | } | |
1897 | ||
e3139fe7 WYG |
1898 | /* |
1899 | * setup rate table in uCode | |
1900 | * return rate_n_flags as used in the table | |
1901 | */ | |
1902 | static u32 rs_update_rate_tbl(struct iwl_priv *priv, | |
1903 | struct iwl_lq_sta *lq_sta, | |
1904 | struct iwl_scale_tbl_info *tbl, | |
1905 | int index, u8 is_green) | |
1906 | { | |
1907 | u32 rate; | |
1908 | ||
1909 | /* Update uCode's rate table. */ | |
1910 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); | |
1911 | rs_fill_link_cmd(priv, lq_sta, rate); | |
fe6b23dd | 1912 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC, false); |
e3139fe7 WYG |
1913 | |
1914 | return rate; | |
1915 | } | |
1916 | ||
77626355 BC |
1917 | /* |
1918 | * Do rate scaling and search for new modulation mode. | |
1919 | */ | |
c79dd5b5 | 1920 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 1921 | struct sk_buff *skb, |
4b7679a5 JB |
1922 | struct ieee80211_sta *sta, |
1923 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 1924 | { |
4b7679a5 | 1925 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 1926 | struct ieee80211_conf *conf = &hw->conf; |
514d65c1 GS |
1927 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1928 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
b481de9c ZY |
1929 | int low = IWL_RATE_INVALID; |
1930 | int high = IWL_RATE_INVALID; | |
1931 | int index; | |
1932 | int i; | |
e227ceac | 1933 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1934 | int current_tpt = IWL_INVALID_VALUE; |
1935 | int low_tpt = IWL_INVALID_VALUE; | |
1936 | int high_tpt = IWL_INVALID_VALUE; | |
1937 | u32 fail_count; | |
1938 | s8 scale_action = 0; | |
fd7c8a40 | 1939 | u16 rate_mask; |
b481de9c | 1940 | u8 update_lq = 0; |
e227ceac | 1941 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1942 | u16 rate_scale_index_msk = 0; |
39e88504 | 1943 | u32 rate; |
b481de9c ZY |
1944 | u8 is_green = 0; |
1945 | u8 active_tbl = 0; | |
1946 | u8 done_search = 0; | |
1947 | u16 high_low; | |
a5e8b505 | 1948 | s32 sr; |
0c11b4de | 1949 | u8 tid = MAX_TID_COUNT; |
86b4766b | 1950 | struct iwl_tid_data *tid_data; |
b481de9c | 1951 | |
e1623446 | 1952 | IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 1953 | |
514d65c1 | 1954 | /* Send management frames and NO_ACK data using lowest rate. */ |
417f114b TW |
1955 | /* TODO: this could probably be improved.. */ |
1956 | if (!ieee80211_is_data(hdr->frame_control) || | |
514d65c1 | 1957 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c | 1958 | return; |
b481de9c | 1959 | |
4b7679a5 | 1960 | if (!sta || !lq_sta) |
b481de9c ZY |
1961 | return; |
1962 | ||
4b7679a5 | 1963 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 1964 | |
faa29718 | 1965 | tid = rs_tl_add_packet(lq_sta, hdr); |
e3949d62 DH |
1966 | if ((tid != MAX_TID_COUNT) && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
1967 | tid_data = &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
1968 | if (tid_data->agg.state == IWL_AGG_OFF) | |
1969 | lq_sta->is_agg = 0; | |
1970 | else | |
1971 | lq_sta->is_agg = 1; | |
1972 | } else | |
1973 | lq_sta->is_agg = 0; | |
faa29718 | 1974 | |
77626355 BC |
1975 | /* |
1976 | * Select rate-scale / modulation-mode table to work with in | |
1977 | * the rest of this function: "search" if searching for better | |
1978 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1979 | */ | |
c33104f0 TW |
1980 | if (!lq_sta->search_better_tbl) |
1981 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1982 | else |
c33104f0 | 1983 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1984 | |
c33104f0 | 1985 | tbl = &(lq_sta->lq_info[active_tbl]); |
2681b20b WYG |
1986 | if (is_legacy(tbl->lq_type)) |
1987 | lq_sta->is_green = 0; | |
1988 | else | |
b261793d | 1989 | lq_sta->is_green = rs_use_green(sta, &priv->current_ht_config); |
c33104f0 | 1990 | is_green = lq_sta->is_green; |
b481de9c | 1991 | |
77626355 | 1992 | /* current tx rate */ |
b7e35008 | 1993 | index = lq_sta->last_txrate_idx; |
b481de9c | 1994 | |
e1623446 | 1995 | IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
b481de9c ZY |
1996 | tbl->lq_type); |
1997 | ||
77626355 | 1998 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1999 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c | 2000 | |
91dd6c27 | 2001 | IWL_DEBUG_RATE(priv, "mask 0x%04X\n", rate_mask); |
b481de9c ZY |
2002 | |
2003 | /* mask with station rate restriction */ | |
2004 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 2005 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 2006 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 2007 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 2008 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
2009 | else |
2010 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 2011 | lq_sta->supp_rates); |
b481de9c ZY |
2012 | |
2013 | } else | |
2014 | rate_scale_index_msk = rate_mask; | |
2015 | ||
2016 | if (!rate_scale_index_msk) | |
2017 | rate_scale_index_msk = rate_mask; | |
2018 | ||
07bc28ed | 2019 | if (!((1 << index) & rate_scale_index_msk)) { |
15b1687c | 2020 | IWL_ERR(priv, "Current Rate is not valid\n"); |
e3139fe7 WYG |
2021 | if (lq_sta->search_better_tbl) { |
2022 | /* revert to active table if search table is not valid*/ | |
2023 | tbl->lq_type = LQ_NONE; | |
2024 | lq_sta->search_better_tbl = 0; | |
2025 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2026 | /* get "active" rate info */ | |
2027 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); | |
2028 | rate = rs_update_rate_tbl(priv, lq_sta, | |
2029 | tbl, index, is_green); | |
2030 | } | |
07bc28ed | 2031 | return; |
b481de9c ZY |
2032 | } |
2033 | ||
77626355 | 2034 | /* Get expected throughput table and history window for current rate */ |
07bc28ed | 2035 | if (!tbl->expected_tpt) { |
15b1687c | 2036 | IWL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
07bc28ed GC |
2037 | return; |
2038 | } | |
b481de9c | 2039 | |
c6ec7a9b AM |
2040 | /* force user max rate if set by user */ |
2041 | if ((lq_sta->max_rate_idx != -1) && | |
2042 | (lq_sta->max_rate_idx < index)) { | |
2043 | index = lq_sta->max_rate_idx; | |
2044 | update_lq = 1; | |
2045 | window = &(tbl->win[index]); | |
2046 | goto lq_update; | |
2047 | } | |
2048 | ||
b481de9c ZY |
2049 | window = &(tbl->win[index]); |
2050 | ||
77626355 BC |
2051 | /* |
2052 | * If there is not enough history to calculate actual average | |
2053 | * throughput, keep analyzing results of more tx frames, without | |
2054 | * changing rate or mode (bypass most of the rest of this function). | |
2055 | * Set up new rate table in uCode only if old rate is not supported | |
2056 | * in current association (use new rate found above). | |
2057 | */ | |
b481de9c | 2058 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
2059 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
2060 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
e1623446 | 2061 | IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
b481de9c ZY |
2062 | "for index %d\n", |
2063 | window->success_counter, window->counter, index); | |
77626355 BC |
2064 | |
2065 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 2066 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
2067 | |
2068 | /* Should we stay with this modulation mode, | |
2069 | * or search for a new one? */ | |
c33104f0 | 2070 | rs_stay_in_table(lq_sta); |
77626355 | 2071 | |
b481de9c | 2072 | goto out; |
3110bef7 | 2073 | } |
77626355 BC |
2074 | /* Else we have enough samples; calculate estimate of |
2075 | * actual average throughput */ | |
3d79b2a9 RC |
2076 | if (window->average_tpt != ((window->success_ratio * |
2077 | tbl->expected_tpt[index] + 64) / 128)) { | |
2078 | IWL_ERR(priv, "expected_tpt should have been calculated by now\n"); | |
2079 | window->average_tpt = ((window->success_ratio * | |
2080 | tbl->expected_tpt[index] + 64) / 128); | |
2081 | } | |
b481de9c | 2082 | |
77626355 | 2083 | /* If we are searching for better modulation mode, check success. */ |
46f9381a | 2084 | if (lq_sta->search_better_tbl && |
3ad3b92a | 2085 | (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) { |
77626355 BC |
2086 | /* If good success, continue using the "search" mode; |
2087 | * no need to send new link quality command, since we're | |
2088 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
2089 | if (window->average_tpt > lq_sta->last_tpt) { |
2090 | ||
e1623446 | 2091 | IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
2092 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2093 | window->success_ratio, | |
2094 | window->average_tpt, | |
2095 | lq_sta->last_tpt); | |
2096 | ||
2097 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 2098 | lq_sta->enable_counter = 1; |
07bc28ed | 2099 | |
77626355 | 2100 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 2101 | lq_sta->active_tbl = active_tbl; |
b481de9c | 2102 | current_tpt = window->average_tpt; |
77626355 BC |
2103 | |
2104 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 2105 | } else { |
07bc28ed | 2106 | |
e1623446 | 2107 | IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
07bc28ed GC |
2108 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2109 | window->success_ratio, | |
2110 | window->average_tpt, | |
2111 | lq_sta->last_tpt); | |
2112 | ||
77626355 | 2113 | /* Nullify "search" table */ |
b481de9c | 2114 | tbl->lq_type = LQ_NONE; |
77626355 BC |
2115 | |
2116 | /* Revert to "active" table */ | |
c33104f0 TW |
2117 | active_tbl = lq_sta->active_tbl; |
2118 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 2119 | |
77626355 | 2120 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 2121 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 2122 | current_tpt = lq_sta->last_tpt; |
b481de9c | 2123 | |
77626355 | 2124 | /* Need to set up a new rate table in uCode */ |
b481de9c | 2125 | update_lq = 1; |
b481de9c | 2126 | } |
77626355 BC |
2127 | |
2128 | /* Either way, we've made a decision; modulation mode | |
2129 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 2130 | lq_sta->search_better_tbl = 0; |
77626355 | 2131 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
2132 | goto lq_update; |
2133 | } | |
2134 | ||
77626355 BC |
2135 | /* (Else) not in search of better modulation mode, try for better |
2136 | * starting rate, while staying in this mode. */ | |
bf403db8 | 2137 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
2138 | tbl->lq_type); |
2139 | low = high_low & 0xff; | |
2140 | high = (high_low >> 8) & 0xff; | |
2141 | ||
c6ec7a9b AM |
2142 | /* If user set max rate, dont allow higher than user constrain */ |
2143 | if ((lq_sta->max_rate_idx != -1) && | |
2144 | (lq_sta->max_rate_idx < high)) | |
2145 | high = IWL_RATE_INVALID; | |
2146 | ||
a5e8b505 GC |
2147 | sr = window->success_ratio; |
2148 | ||
77626355 | 2149 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 2150 | current_tpt = window->average_tpt; |
b481de9c ZY |
2151 | if (low != IWL_RATE_INVALID) |
2152 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
2153 | if (high != IWL_RATE_INVALID) |
2154 | high_tpt = tbl->win[high].average_tpt; | |
2155 | ||
a5e8b505 | 2156 | scale_action = 0; |
b481de9c | 2157 | |
77626355 | 2158 | /* Too many failures, decrease rate */ |
a5e8b505 | 2159 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
e1623446 | 2160 | IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
b481de9c | 2161 | scale_action = -1; |
77626355 BC |
2162 | |
2163 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 2164 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
2165 | (high_tpt == IWL_INVALID_VALUE)) { |
2166 | ||
2167 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
2168 | scale_action = 1; | |
2169 | else if (low != IWL_RATE_INVALID) | |
8fe72311 | 2170 | scale_action = 0; |
a5e8b505 | 2171 | } |
77626355 BC |
2172 | |
2173 | /* Both adjacent throughputs are measured, but neither one has better | |
2174 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
2175 | else if ((low_tpt != IWL_INVALID_VALUE) && |
2176 | (high_tpt != IWL_INVALID_VALUE) && | |
2177 | (low_tpt < current_tpt) && | |
2178 | (high_tpt < current_tpt)) | |
2179 | scale_action = 0; | |
77626355 BC |
2180 | |
2181 | /* At least one adjacent rate's throughput is measured, | |
2182 | * and may have better performance. */ | |
b481de9c | 2183 | else { |
77626355 | 2184 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 2185 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 2186 | /* Higher rate has better throughput */ |
a5e8b505 GC |
2187 | if (high_tpt > current_tpt && |
2188 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 2189 | scale_action = 1; |
a5e8b505 | 2190 | } else { |
8fe72311 | 2191 | scale_action = 0; |
b481de9c | 2192 | } |
77626355 BC |
2193 | |
2194 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 2195 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 2196 | /* Lower rate has better throughput */ |
b481de9c | 2197 | if (low_tpt > current_tpt) { |
e1623446 TW |
2198 | IWL_DEBUG_RATE(priv, |
2199 | "decrease rate because of low tpt\n"); | |
b481de9c | 2200 | scale_action = -1; |
a5e8b505 | 2201 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 2202 | scale_action = 1; |
a5e8b505 | 2203 | } |
b481de9c ZY |
2204 | } |
2205 | } | |
2206 | ||
77626355 BC |
2207 | /* Sanity check; asked for decrease, but success rate or throughput |
2208 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
2209 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
2210 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 2211 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c | 2212 | scale_action = 0; |
46f9381a WYG |
2213 | if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type)) |
2214 | scale_action = -1; | |
3ad3b92a | 2215 | if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI && |
46f9381a WYG |
2216 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) |
2217 | scale_action = -1; | |
b481de9c ZY |
2218 | switch (scale_action) { |
2219 | case -1: | |
77626355 | 2220 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
2221 | if (low != IWL_RATE_INVALID) { |
2222 | update_lq = 1; | |
2223 | index = low; | |
2224 | } | |
447fee70 | 2225 | |
b481de9c ZY |
2226 | break; |
2227 | case 1: | |
77626355 | 2228 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
2229 | if (high != IWL_RATE_INVALID) { |
2230 | update_lq = 1; | |
2231 | index = high; | |
2232 | } | |
2233 | ||
2234 | break; | |
2235 | case 0: | |
77626355 | 2236 | /* No change */ |
b481de9c ZY |
2237 | default: |
2238 | break; | |
2239 | } | |
2240 | ||
e1623446 | 2241 | IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
b481de9c ZY |
2242 | "high %d type %d\n", |
2243 | index, scale_action, low, high, tbl->lq_type); | |
2244 | ||
a5e8b505 | 2245 | lq_update: |
77626355 | 2246 | /* Replace uCode's rate table for the destination station. */ |
e3139fe7 WYG |
2247 | if (update_lq) |
2248 | rate = rs_update_rate_tbl(priv, lq_sta, | |
2249 | tbl, index, is_green); | |
77626355 | 2250 | |
3ad3b92a | 2251 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) { |
46f9381a WYG |
2252 | /* Should we stay with this modulation mode, |
2253 | * or search for a new one? */ | |
2254 | rs_stay_in_table(lq_sta); | |
2255 | } | |
77626355 BC |
2256 | /* |
2257 | * Search for new modulation mode if we're: | |
2258 | * 1) Not changing rates right now | |
2259 | * 2) Not just finishing up a search | |
2260 | * 3) Allowing a new search | |
2261 | */ | |
47cfd463 | 2262 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 2263 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 2264 | lq_sta->last_tpt = current_tpt; |
b481de9c | 2265 | |
77626355 BC |
2266 | /* Select a new "search" modulation mode to try. |
2267 | * If one is found, set up the new "search" table. */ | |
b481de9c | 2268 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 2269 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2270 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 2271 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
584a0f00 WYG |
2272 | else if (is_mimo2(tbl->lq_type)) |
2273 | rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); | |
b481de9c | 2274 | else |
584a0f00 | 2275 | rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2276 | |
77626355 | 2277 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2278 | if (lq_sta->search_better_tbl) { |
77626355 | 2279 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2280 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2281 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2282 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2283 | ||
77626355 | 2284 | /* Use new "search" start rate */ |
e7d326ac | 2285 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2286 | |
e1623446 | 2287 | IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
39e88504 | 2288 | tbl->current_rate, index); |
07bc28ed | 2289 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
fe6b23dd | 2290 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC, false); |
447fee70 MA |
2291 | } else |
2292 | done_search = 1; | |
2293 | } | |
b481de9c | 2294 | |
447fee70 | 2295 | if (done_search && !lq_sta->stay_in_tbl) { |
77626355 BC |
2296 | /* If the "active" (non-search) mode was legacy, |
2297 | * and we've tried switching antennas, | |
2298 | * but we haven't been able to try HT modes (not available), | |
2299 | * stay with best antenna legacy modulation for a while | |
2300 | * before next round of mode comparisons. */ | |
c33104f0 | 2301 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
de27e64e | 2302 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && |
d6e93399 | 2303 | lq_sta->action_counter > tbl1->max_search) { |
e1623446 | 2304 | IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
bf403db8 | 2305 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2306 | } |
2307 | ||
77626355 BC |
2308 | /* If we're in an HT mode, and all 3 mode switch actions |
2309 | * have been tried and compared, stay in this best modulation | |
2310 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 | 2311 | if (lq_sta->enable_counter && |
46f9381a WYG |
2312 | (lq_sta->action_counter >= tbl1->max_search) && |
2313 | iwl_ht_enabled(priv)) { | |
0c11b4de RR |
2314 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2315 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2316 | (tid != MAX_TID_COUNT)) { | |
86b4766b WYG |
2317 | tid_data = |
2318 | &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
2319 | if (tid_data->agg.state == IWL_AGG_OFF) { | |
2320 | IWL_DEBUG_RATE(priv, | |
2321 | "try to aggregate tid %d\n", | |
2322 | tid); | |
2323 | rs_tl_turn_on_agg(priv, tid, | |
2324 | lq_sta, sta); | |
2325 | } | |
b481de9c | 2326 | } |
bf403db8 | 2327 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2328 | } |
b481de9c ZY |
2329 | } |
2330 | ||
2331 | out: | |
978785a3 | 2332 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
b481de9c | 2333 | i = index; |
b7e35008 | 2334 | lq_sta->last_txrate_idx = i; |
b481de9c ZY |
2335 | } |
2336 | ||
fe6b23dd RC |
2337 | /** |
2338 | * rs_initialize_lq - Initialize a station's hardware rate table | |
2339 | * | |
2340 | * The uCode's station table contains a table of fallback rates | |
2341 | * for automatic fallback during transmission. | |
2342 | * | |
2343 | * NOTE: This sets up a default set of values. These will be replaced later | |
2344 | * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of | |
2345 | * rc80211_simple. | |
2346 | * | |
2347 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2348 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2349 | * which requires station table entry to exist). | |
2350 | */ | |
c79dd5b5 | 2351 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2352 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2353 | struct ieee80211_sta *sta, |
2354 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2355 | { |
e227ceac | 2356 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2357 | int rate_idx; |
aade00ce | 2358 | int i; |
39e88504 | 2359 | u32 rate; |
b261793d | 2360 | u8 use_green = rs_use_green(sta, &priv->current_ht_config); |
aade00ce GC |
2361 | u8 active_tbl = 0; |
2362 | u8 valid_tx_ant; | |
b481de9c | 2363 | |
4b7679a5 | 2364 | if (!sta || !lq_sta) |
b481de9c ZY |
2365 | goto out; |
2366 | ||
b7e35008 | 2367 | i = lq_sta->last_txrate_idx; |
b481de9c | 2368 | |
aade00ce GC |
2369 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2370 | ||
c33104f0 TW |
2371 | if (!lq_sta->search_better_tbl) |
2372 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2373 | else |
c33104f0 | 2374 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2375 | |
c33104f0 | 2376 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2377 | |
2378 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2379 | i = 0; | |
2380 | ||
1826dcc0 | 2381 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2382 | tbl->ant_type = first_antenna(valid_tx_ant); |
2383 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2384 | |
2385 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2386 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2387 | |
39e88504 | 2388 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2389 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2390 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2391 | |
978785a3 | 2392 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2393 | tbl->current_rate = rate; |
eecd6e57 | 2394 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2395 | rs_fill_link_cmd(NULL, lq_sta, rate); |
fe6b23dd RC |
2396 | priv->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
2397 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_SYNC, true); | |
b481de9c ZY |
2398 | out: |
2399 | return; | |
2400 | } | |
2401 | ||
e6a9854b JB |
2402 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2403 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2404 | { |
2405 | ||
e6a9854b JB |
2406 | struct sk_buff *skb = txrc->skb; |
2407 | struct ieee80211_supported_band *sband = txrc->sband; | |
f875f518 | 2408 | struct iwl_priv *priv __maybe_unused = (struct iwl_priv *)priv_r; |
e6a9854b | 2409 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2410 | struct iwl_lq_sta *lq_sta = priv_sta; |
2411 | int rate_idx; | |
b481de9c | 2412 | |
e1623446 | 2413 | IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2414 | |
c6ec7a9b AM |
2415 | /* Get max rate if user set max rate */ |
2416 | if (lq_sta) { | |
2417 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2418 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2419 | (lq_sta->max_rate_idx != -1)) | |
2420 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2421 | if ((lq_sta->max_rate_idx < 0) || | |
2422 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2423 | lq_sta->max_rate_idx = -1; | |
2424 | } | |
2425 | ||
fe6b23dd RC |
2426 | /* Treat uninitialized rate scaling data same as non-existing. */ |
2427 | if (lq_sta && !lq_sta->drv) { | |
2428 | IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); | |
2429 | priv_sta = NULL; | |
2430 | } | |
2431 | ||
514d65c1 | 2432 | /* Send management frames and NO_ACK data using lowest rate. */ |
4c6d4f5c | 2433 | if (rate_control_send_low(sta, priv_sta, txrc)) |
4b7679a5 | 2434 | return; |
b481de9c | 2435 | |
417f114b | 2436 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2437 | |
a9c146b3 | 2438 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { |
417f114b | 2439 | rate_idx -= IWL_FIRST_OFDM_RATE; |
a9c146b3 WYG |
2440 | /* 6M and 9M shared same MCS index */ |
2441 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; | |
2442 | if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2443 | IWL_RATE_MIMO3_6M_PLCP) | |
2444 | rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM); | |
2445 | else if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2446 | IWL_RATE_MIMO2_6M_PLCP) | |
2447 | rate_idx = rate_idx + MCS_INDEX_PER_STREAM; | |
2448 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; | |
2449 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2450 | info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI; | |
2451 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) | |
2452 | info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA; | |
7aafef1c | 2453 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
a9c146b3 WYG |
2454 | info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2455 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) | |
2456 | info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
2457 | } else { | |
5027309b DH |
2458 | /* Check for invalid rates */ |
2459 | if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) || | |
2460 | ((sband->band == IEEE80211_BAND_5GHZ) && | |
2461 | (rate_idx < IWL_FIRST_OFDM_RATE))) | |
a9c146b3 | 2462 | rate_idx = rate_lowest_index(sband, sta); |
5027309b | 2463 | /* On valid 5 GHz rate, adjust index */ |
a9c146b3 WYG |
2464 | else if (sband->band == IEEE80211_BAND_5GHZ) |
2465 | rate_idx -= IWL_FIRST_OFDM_RATE; | |
7ebaeff8 | 2466 | info->control.rates[0].flags = 0; |
a9c146b3 | 2467 | } |
417f114b | 2468 | info->control.rates[0].idx = rate_idx; |
a9c146b3 | 2469 | |
b481de9c ZY |
2470 | } |
2471 | ||
4b7679a5 JB |
2472 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2473 | gfp_t gfp) | |
b481de9c | 2474 | { |
e227ceac | 2475 | struct iwl_lq_sta *lq_sta; |
8d9698b3 | 2476 | struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv; |
bf403db8 | 2477 | struct iwl_priv *priv; |
b481de9c | 2478 | |
bf403db8 | 2479 | priv = (struct iwl_priv *)priv_rate; |
e1623446 | 2480 | IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
b481de9c | 2481 | |
8d9698b3 | 2482 | lq_sta = &sta_priv->lq_sta; |
b481de9c | 2483 | |
c33104f0 | 2484 | return lq_sta; |
b481de9c ZY |
2485 | } |
2486 | ||
fe6b23dd RC |
2487 | /* |
2488 | * Called after adding a new station to initialize rate scaling | |
2489 | */ | |
2490 | void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_id) | |
b481de9c ZY |
2491 | { |
2492 | int i, j; | |
fe6b23dd | 2493 | struct ieee80211_hw *hw = priv->hw; |
4b7679a5 | 2494 | struct ieee80211_conf *conf = &priv->hw->conf; |
7869b0ea | 2495 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
fe6b23dd RC |
2496 | struct iwl_station_priv *sta_priv; |
2497 | struct iwl_lq_sta *lq_sta; | |
2498 | struct ieee80211_supported_band *sband; | |
2499 | ||
2500 | sta_priv = (struct iwl_station_priv *) sta->drv_priv; | |
2501 | lq_sta = &sta_priv->lq_sta; | |
2502 | sband = hw->wiphy->bands[conf->channel->band]; | |
b481de9c | 2503 | |
fe6b23dd RC |
2504 | |
2505 | lq_sta->lq.sta_id = sta_id; | |
5ad13f8c RC |
2506 | |
2507 | for (j = 0; j < LQ_SIZE; j++) | |
2508 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
2509 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); | |
2510 | ||
c33104f0 | 2511 | lq_sta->flush_timer = 0; |
4b7679a5 | 2512 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2513 | for (j = 0; j < LQ_SIZE; j++) |
2514 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2515 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2516 | |
fe6b23dd RC |
2517 | IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init for station %d ***\n", |
2518 | sta_id); | |
b481de9c ZY |
2519 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2520 | * the lowest or the highest rate.. Could consider using RSSI from | |
2521 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2522 | * after assoc.. */ | |
2523 | ||
c33104f0 | 2524 | lq_sta->is_dup = 0; |
c6ec7a9b | 2525 | lq_sta->max_rate_idx = -1; |
7d049e5a | 2526 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; |
b261793d | 2527 | lq_sta->is_green = rs_use_green(sta, &priv->current_ht_config); |
39e88504 | 2528 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
8318d78a | 2529 | lq_sta->band = priv->band; |
77626355 BC |
2530 | /* |
2531 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2532 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2533 | */ | |
7869b0ea DH |
2534 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; |
2535 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2536 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2537 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2538 | |
77626355 | 2539 | /* Same here */ |
7869b0ea DH |
2540 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; |
2541 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2542 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2543 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2544 | ||
7869b0ea DH |
2545 | lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1; |
2546 | lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2547 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2548 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2549 | ||
e1623446 | 2550 | IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2551 | lq_sta->active_siso_rate, |
fde0db31 GC |
2552 | lq_sta->active_mimo2_rate, |
2553 | lq_sta->active_mimo3_rate); | |
2554 | ||
a96a27f9 | 2555 | /* These values will be overridden later */ |
3a23d695 WYG |
2556 | lq_sta->lq.general_params.single_stream_ant_msk = |
2557 | first_antenna(priv->hw_params.valid_tx_ant); | |
2558 | lq_sta->lq.general_params.dual_stream_ant_msk = | |
2559 | priv->hw_params.valid_tx_ant & | |
2560 | ~first_antenna(priv->hw_params.valid_tx_ant); | |
2561 | if (!lq_sta->lq.general_params.dual_stream_ant_msk) { | |
2562 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2563 | } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) { | |
2564 | lq_sta->lq.general_params.dual_stream_ant_msk = | |
2565 | priv->hw_params.valid_tx_ant; | |
2566 | } | |
07bc28ed | 2567 | |
0c11b4de RR |
2568 | /* as default allow aggregation for all tids */ |
2569 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2570 | lq_sta->drv = priv; |
b481de9c | 2571 | |
5027309b DH |
2572 | /* Set last_txrate_idx to lowest rate */ |
2573 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2574 | if (sband->band == IEEE80211_BAND_5GHZ) | |
2575 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
e3949d62 | 2576 | lq_sta->is_agg = 0; |
d5e49036 | 2577 | |
4b7679a5 | 2578 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2579 | } |
2580 | ||
46f9381a | 2581 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 2582 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2583 | { |
e227ceac | 2584 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2585 | int index = 0; |
b481de9c | 2586 | int rate_idx; |
1b696de2 | 2587 | int repeat_rate = 0; |
aade00ce | 2588 | u8 ant_toggle_cnt = 0; |
b481de9c | 2589 | u8 use_ht_possible = 1; |
aade00ce | 2590 | u8 valid_tx_ant = 0; |
07bc28ed | 2591 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2592 | |
77626355 | 2593 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2594 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2595 | |
39e88504 | 2596 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2597 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2598 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2599 | &tbl_type, &rate_idx); |
2600 | ||
77626355 | 2601 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2602 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2603 | ant_toggle_cnt = 1; |
1b696de2 | 2604 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2605 | } else { |
1b696de2 | 2606 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2607 | } |
b481de9c ZY |
2608 | |
2609 | lq_cmd->general_params.mimo_delimiter = | |
2610 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2611 | |
2612 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2613 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2614 | |
07bc28ed GC |
2615 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2616 | lq_cmd->general_params.single_stream_ant_msk = | |
2617 | tbl_type.ant_type; | |
2618 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2619 | lq_cmd->general_params.dual_stream_ant_msk = | |
2620 | tbl_type.ant_type; | |
2621 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2622 | |
2623 | index++; | |
1b696de2 | 2624 | repeat_rate--; |
b481de9c | 2625 | |
aade00ce GC |
2626 | if (priv) |
2627 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2628 | ||
77626355 | 2629 | /* Fill rest of rate table */ |
b481de9c | 2630 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2631 | /* Repeat initial/next rate. |
2632 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2633 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2634 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2635 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2636 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2637 | ant_toggle_cnt++; | |
2638 | else if (priv && | |
2639 | rs_toggle_antenna(valid_tx_ant, | |
2640 | &new_rate, &tbl_type)) | |
2641 | ant_toggle_cnt = 1; | |
2642 | } | |
98d7e09a | 2643 | |
77626355 | 2644 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2645 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2646 | |
2647 | /* Fill next table entry */ | |
b481de9c | 2648 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2649 | cpu_to_le32(new_rate); |
1b696de2 | 2650 | repeat_rate--; |
b481de9c ZY |
2651 | index++; |
2652 | } | |
2653 | ||
39e88504 | 2654 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2655 | &rate_idx); |
2656 | ||
77626355 BC |
2657 | /* Indicate to uCode which entries might be MIMO. |
2658 | * If initial rate was MIMO, this will finally end up | |
2659 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2660 | if (is_mimo(tbl_type.lq_type)) |
2661 | lq_cmd->general_params.mimo_delimiter = index; | |
2662 | ||
77626355 | 2663 | /* Get next rate */ |
39e88504 GC |
2664 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2665 | use_ht_possible); | |
b481de9c | 2666 | |
77626355 | 2667 | /* How many times should we repeat the next rate? */ |
b481de9c | 2668 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2669 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2670 | ant_toggle_cnt++; | |
2671 | else if (priv && | |
2672 | rs_toggle_antenna(valid_tx_ant, | |
2673 | &new_rate, &tbl_type)) | |
2674 | ant_toggle_cnt = 1; | |
2675 | ||
1b696de2 | 2676 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2677 | } else { |
1b696de2 | 2678 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2679 | } |
b481de9c | 2680 | |
77626355 BC |
2681 | /* Don't allow HT rates after next pass. |
2682 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2683 | use_ht_possible = 0; |
2684 | ||
77626355 | 2685 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2686 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2687 | |
2688 | /* Fill next table entry */ | |
39e88504 | 2689 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2690 | |
2691 | index++; | |
1b696de2 | 2692 | repeat_rate--; |
b481de9c ZY |
2693 | } |
2694 | ||
4d80d721 | 2695 | lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; |
13c33a09 WYG |
2696 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; |
2697 | lq_cmd->agg_params.agg_time_limit = | |
2698 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
b481de9c ZY |
2699 | } |
2700 | ||
4b7679a5 | 2701 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2702 | { |
4b7679a5 | 2703 | return hw->priv; |
b481de9c ZY |
2704 | } |
2705 | /* rate scale requires free function to be implemented */ | |
2706 | static void rs_free(void *priv_rate) | |
2707 | { | |
2708 | return; | |
2709 | } | |
2710 | ||
4b7679a5 JB |
2711 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2712 | void *priv_sta) | |
b481de9c | 2713 | { |
45527c2c | 2714 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c | 2715 | |
e1623446 | 2716 | IWL_DEBUG_RATE(priv, "enter\n"); |
e1623446 | 2717 | IWL_DEBUG_RATE(priv, "leave\n"); |
b481de9c ZY |
2718 | } |
2719 | ||
2720 | ||
93dc646a | 2721 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2722 | static int open_file_generic(struct inode *inode, struct file *file) |
2723 | { | |
2724 | file->private_data = inode->i_private; | |
2725 | return 0; | |
2726 | } | |
e227ceac TW |
2727 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2728 | u32 *rate_n_flags, int index) | |
98d7e09a | 2729 | { |
bf403db8 | 2730 | struct iwl_priv *priv; |
3c4955f8 WYG |
2731 | u8 valid_tx_ant; |
2732 | u8 ant_sel_tx; | |
bf403db8 EK |
2733 | |
2734 | priv = lq_sta->drv; | |
3c4955f8 | 2735 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
39e88504 | 2736 | if (lq_sta->dbg_fixed_rate) { |
3c4955f8 WYG |
2737 | ant_sel_tx = |
2738 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
2739 | >> RATE_MCS_ANT_POS); | |
2740 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
39e88504 | 2741 | *rate_n_flags = lq_sta->dbg_fixed_rate; |
3c4955f8 | 2742 | IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
39e88504 | 2743 | } else { |
3c4955f8 WYG |
2744 | lq_sta->dbg_fixed_rate = 0; |
2745 | IWL_ERR(priv, | |
2746 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
2747 | ant_sel_tx, valid_tx_ant); | |
2748 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); | |
39e88504 | 2749 | } |
39e88504 | 2750 | } else { |
e1623446 | 2751 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
98d7e09a | 2752 | } |
98d7e09a | 2753 | } |
5ae212c9 | 2754 | |
98d7e09a ZY |
2755 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2756 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2757 | { | |
e227ceac | 2758 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2759 | struct iwl_priv *priv; |
98d7e09a ZY |
2760 | char buf[64]; |
2761 | int buf_size; | |
2762 | u32 parsed_rate; | |
2763 | ||
bf403db8 | 2764 | priv = lq_sta->drv; |
98d7e09a ZY |
2765 | memset(buf, 0, sizeof(buf)); |
2766 | buf_size = min(count, sizeof(buf) - 1); | |
2767 | if (copy_from_user(buf, user_buf, buf_size)) | |
2768 | return -EFAULT; | |
2769 | ||
2770 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2771 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2772 | else |
39e88504 | 2773 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2774 | |
39e88504 GC |
2775 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2776 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2777 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2778 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a | 2779 | |
e1623446 | 2780 | IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
39e88504 | 2781 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2782 | |
39e88504 | 2783 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2784 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
fe6b23dd | 2785 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC, false); |
98d7e09a ZY |
2786 | } |
2787 | ||
2788 | return count; | |
2789 | } | |
0209dc11 | 2790 | |
5ae212c9 ZY |
2791 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2792 | char __user *user_buf, size_t count, loff_t *ppos) | |
2793 | { | |
a412c804 | 2794 | char *buff; |
5ae212c9 ZY |
2795 | int desc = 0; |
2796 | int i = 0; | |
12b96817 | 2797 | int index = 0; |
a412c804 | 2798 | ssize_t ret; |
5ae212c9 | 2799 | |
e227ceac | 2800 | struct iwl_lq_sta *lq_sta = file->private_data; |
d8ae4f52 | 2801 | struct iwl_priv *priv; |
adb7b5e6 | 2802 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
5ae212c9 | 2803 | |
d8ae4f52 | 2804 | priv = lq_sta->drv; |
a412c804 FS |
2805 | buff = kmalloc(1024, GFP_KERNEL); |
2806 | if (!buff) | |
2807 | return -ENOMEM; | |
2808 | ||
c33104f0 | 2809 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2810 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2811 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2812 | lq_sta->active_legacy_rate); |
98d7e09a | 2813 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2814 | lq_sta->dbg_fixed_rate); |
d8ae4f52 WYG |
2815 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
2816 | (priv->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", | |
2817 | (priv->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2818 | (priv->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
adb7b5e6 WYG |
2819 | desc += sprintf(buff+desc, "lq type %s\n", |
2820 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
2821 | if (is_Ht(tbl->lq_type)) { | |
2822 | desc += sprintf(buff+desc, " %s", | |
2823 | (is_siso(tbl->lq_type)) ? "SISO" : | |
2824 | ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); | |
2825 | desc += sprintf(buff+desc, " %s", | |
7aafef1c | 2826 | (tbl->is_ht40) ? "40MHz" : "20MHz"); |
e3949d62 DH |
2827 | desc += sprintf(buff+desc, " %s %s %s\n", (tbl->is_SGI) ? "SGI" : "", |
2828 | (lq_sta->is_green) ? "GF enabled" : "", | |
2829 | (lq_sta->is_agg) ? "AGG on" : ""); | |
adb7b5e6 | 2830 | } |
12b96817 WYG |
2831 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", |
2832 | lq_sta->last_rate_n_flags); | |
5ae212c9 ZY |
2833 | desc += sprintf(buff+desc, "general:" |
2834 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2835 | lq_sta->lq.general_params.flags, |
2836 | lq_sta->lq.general_params.mimo_delimiter, | |
2837 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2838 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2839 | |
2840 | desc += sprintf(buff+desc, "agg:" | |
2841 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2842 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2843 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2844 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2845 | |
2846 | desc += sprintf(buff+desc, | |
2847 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2848 | lq_sta->lq.general_params.start_rate_index[0], |
2849 | lq_sta->lq.general_params.start_rate_index[1], | |
2850 | lq_sta->lq.general_params.start_rate_index[2], | |
2851 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 | 2852 | |
12b96817 WYG |
2853 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
2854 | index = iwl_hwrate_to_plcp_idx( | |
2855 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); | |
2856 | if (is_legacy(tbl->lq_type)) { | |
2857 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
2858 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2859 | iwl_rate_mcs[index].mbps); | |
2860 | } else { | |
2861 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", | |
2862 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2863 | iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); | |
2864 | } | |
2865 | } | |
5ae212c9 | 2866 | |
a412c804 FS |
2867 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2868 | kfree(buff); | |
2869 | return ret; | |
5ae212c9 ZY |
2870 | } |
2871 | ||
2872 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2873 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2874 | .read = rs_sta_dbgfs_scale_table_read, |
2875 | .open = open_file_generic, | |
6038f373 | 2876 | .llseek = default_llseek, |
5ae212c9 | 2877 | }; |
0209dc11 ZY |
2878 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2879 | char __user *user_buf, size_t count, loff_t *ppos) | |
2880 | { | |
a412c804 | 2881 | char *buff; |
0209dc11 ZY |
2882 | int desc = 0; |
2883 | int i, j; | |
a412c804 | 2884 | ssize_t ret; |
0209dc11 | 2885 | |
e227ceac | 2886 | struct iwl_lq_sta *lq_sta = file->private_data; |
a412c804 FS |
2887 | |
2888 | buff = kmalloc(1024, GFP_KERNEL); | |
2889 | if (!buff) | |
2890 | return -ENOMEM; | |
2891 | ||
0209dc11 | 2892 | for (i = 0; i < LQ_SIZE; i++) { |
7aafef1c WYG |
2893 | desc += sprintf(buff+desc, |
2894 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
0209dc11 | 2895 | "rate=0x%X\n", |
c3056065 | 2896 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
2897 | lq_sta->lq_info[i].lq_type, |
2898 | lq_sta->lq_info[i].is_SGI, | |
7aafef1c | 2899 | lq_sta->lq_info[i].is_ht40, |
c33104f0 | 2900 | lq_sta->lq_info[i].is_dup, |
2681b20b | 2901 | lq_sta->is_green, |
39e88504 | 2902 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2903 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2904 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2905 | "counter=%d success=%d %%=%d\n", |
2906 | lq_sta->lq_info[i].win[j].counter, | |
2907 | lq_sta->lq_info[i].win[j].success_counter, | |
2908 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2909 | } |
2910 | } | |
a412c804 FS |
2911 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2912 | kfree(buff); | |
2913 | return ret; | |
0209dc11 ZY |
2914 | } |
2915 | ||
2916 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2917 | .read = rs_sta_dbgfs_stats_table_read, | |
2918 | .open = open_file_generic, | |
6038f373 | 2919 | .llseek = default_llseek, |
0209dc11 | 2920 | }; |
5ae212c9 | 2921 | |
38167459 WYG |
2922 | static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
2923 | char __user *user_buf, size_t count, loff_t *ppos) | |
2924 | { | |
2925 | char buff[120]; | |
2926 | int desc = 0; | |
2927 | ssize_t ret; | |
2928 | ||
2929 | struct iwl_lq_sta *lq_sta = file->private_data; | |
2930 | struct iwl_priv *priv; | |
2931 | struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; | |
2932 | ||
2933 | priv = lq_sta->drv; | |
2934 | ||
2935 | if (is_Ht(tbl->lq_type)) | |
2936 | desc += sprintf(buff+desc, | |
2937 | "Bit Rate= %d Mb/s\n", | |
2938 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
2939 | else | |
2940 | desc += sprintf(buff+desc, | |
2941 | "Bit Rate= %d Mb/s\n", | |
2942 | iwl_rates[lq_sta->last_txrate_idx].ieee >> 1); | |
38167459 WYG |
2943 | |
2944 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2945 | return ret; | |
2946 | } | |
2947 | ||
2948 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
2949 | .read = rs_sta_dbgfs_rate_scale_data_read, | |
2950 | .open = open_file_generic, | |
6038f373 | 2951 | .llseek = default_llseek, |
38167459 WYG |
2952 | }; |
2953 | ||
93dc646a ZY |
2954 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2955 | struct dentry *dir) | |
2956 | { | |
e227ceac | 2957 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2958 | lq_sta->rs_sta_dbgfs_scale_table_file = |
43e85115 | 2959 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
c33104f0 TW |
2960 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2961 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
43e85115 | 2962 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, |
c33104f0 | 2963 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
38167459 | 2964 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = |
43e85115 | 2965 | debugfs_create_file("rate_scale_data", S_IRUSR, dir, |
38167459 | 2966 | lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); |
0c11b4de | 2967 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
43e85115 | 2968 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, |
0c11b4de | 2969 | &lq_sta->tx_agg_tid_en); |
0c11b4de | 2970 | |
93dc646a ZY |
2971 | } |
2972 | ||
2973 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2974 | { | |
e227ceac | 2975 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2976 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2977 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
38167459 | 2978 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); |
0c11b4de | 2979 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2980 | } |
2981 | #endif | |
2982 | ||
fe6b23dd RC |
2983 | /* |
2984 | * Initialization of rate scaling information is done by driver after | |
2985 | * the station is added. Since mac80211 calls this function before a | |
2986 | * station is added we ignore it. | |
2987 | */ | |
2988 | static void rs_rate_init_stub(void *priv_r, struct ieee80211_supported_band *sband, | |
2989 | struct ieee80211_sta *sta, void *priv_sta) | |
2990 | { | |
2991 | } | |
b481de9c ZY |
2992 | static struct rate_control_ops rs_ops = { |
2993 | .module = NULL, | |
2994 | .name = RS_NAME, | |
2995 | .tx_status = rs_tx_status, | |
2996 | .get_rate = rs_get_rate, | |
fe6b23dd | 2997 | .rate_init = rs_rate_init_stub, |
b481de9c ZY |
2998 | .alloc = rs_alloc, |
2999 | .free = rs_free, | |
3000 | .alloc_sta = rs_alloc_sta, | |
3001 | .free_sta = rs_free_sta, | |
93dc646a ZY |
3002 | #ifdef CONFIG_MAC80211_DEBUGFS |
3003 | .add_sta_debugfs = rs_add_debugfs, | |
3004 | .remove_sta_debugfs = rs_remove_debugfs, | |
3005 | #endif | |
b481de9c ZY |
3006 | }; |
3007 | ||
e227ceac | 3008 | int iwlagn_rate_control_register(void) |
b481de9c | 3009 | { |
897e1cf2 | 3010 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
3011 | } |
3012 | ||
e227ceac | 3013 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
3014 | { |
3015 | ieee80211_rate_control_unregister(&rs_ops); | |
3016 | } | |
3017 |