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be663ab6 WYG |
1 | /****************************************************************************** |
2 | * | |
3 | * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * Intel Linux Wireless <ilw@linux.intel.com> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/slab.h> | |
be663ab6 WYG |
30 | #include <net/mac80211.h> |
31 | ||
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
98613be0 | 38 | #include "common.h" |
af038f40 | 39 | #include "4965.h" |
be663ab6 | 40 | |
d3175167 | 41 | #define IL4965_RS_NAME "iwl-4965-rs" |
be663ab6 WYG |
42 | |
43 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 | |
e2ebc833 SG |
44 | #define IL_NUMBER_TRY 1 |
45 | #define IL_HT_NUMBER_TRY 3 | |
be663ab6 | 46 | |
2eb05816 SG |
47 | #define RATE_MAX_WINDOW 62 /* # tx in history win */ |
48 | #define RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
49 | #define RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
be663ab6 WYG |
50 | |
51 | /* max allowed rate miss before sync LQ cmd */ | |
e2ebc833 | 52 | #define IL_MISSED_RATE_MAX 15 |
be663ab6 | 53 | /* max time to accum history 2 seconds */ |
2eb05816 | 54 | #define RATE_SCALE_FLUSH_INTVL (3*HZ) |
be663ab6 WYG |
55 | |
56 | static u8 rs_ht_to_legacy[] = { | |
2d09b062 SG |
57 | RATE_6M_IDX, RATE_6M_IDX, |
58 | RATE_6M_IDX, RATE_6M_IDX, | |
59 | RATE_6M_IDX, | |
60 | RATE_6M_IDX, RATE_9M_IDX, | |
61 | RATE_12M_IDX, RATE_18M_IDX, | |
62 | RATE_24M_IDX, RATE_36M_IDX, | |
63 | RATE_48M_IDX, RATE_54M_IDX | |
be663ab6 WYG |
64 | }; |
65 | ||
66 | static const u8 ant_toggle_lookup[] = { | |
67 | /*ANT_NONE -> */ ANT_NONE, | |
68 | /*ANT_A -> */ ANT_B, | |
69 | /*ANT_B -> */ ANT_C, | |
70 | /*ANT_AB -> */ ANT_BC, | |
71 | /*ANT_C -> */ ANT_A, | |
72 | /*ANT_AC -> */ ANT_AB, | |
73 | /*ANT_BC -> */ ANT_AC, | |
74 | /*ANT_ABC -> */ ANT_ABC, | |
75 | }; | |
76 | ||
e2ebc833 | 77 | #define IL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ |
2d09b062 | 78 | [RATE_##r##M_IDX] = { RATE_##r##M_PLCP, \ |
2eb05816 SG |
79 | RATE_SISO_##s##M_PLCP, \ |
80 | RATE_MIMO2_##s##M_PLCP,\ | |
81 | RATE_##r##M_IEEE, \ | |
2d09b062 SG |
82 | RATE_##ip##M_IDX, \ |
83 | RATE_##in##M_IDX, \ | |
84 | RATE_##rp##M_IDX, \ | |
85 | RATE_##rn##M_IDX, \ | |
86 | RATE_##pp##M_IDX, \ | |
87 | RATE_##np##M_IDX } | |
be663ab6 WYG |
88 | |
89 | /* | |
90 | * Parameter order: | |
91 | * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate | |
92 | * | |
93 | * If there isn't a valid next or previous rate then INV is used which | |
2eb05816 | 94 | * maps to RATE_INVALID |
be663ab6 WYG |
95 | * |
96 | */ | |
2eb05816 | 97 | const struct il_rate_info il_rates[RATE_COUNT] = { |
e7392364 | 98 | IL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ |
1722f8e1 | 99 | IL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ |
e7392364 SG |
100 | IL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ |
101 | IL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ | |
1722f8e1 | 102 | IL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ |
e7392364 SG |
103 | IL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ |
104 | IL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ | |
105 | IL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ | |
106 | IL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ | |
107 | IL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ | |
108 | IL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ | |
1722f8e1 SG |
109 | IL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ |
110 | IL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ | |
be663ab6 WYG |
111 | }; |
112 | ||
e7392364 SG |
113 | static int |
114 | il4965_hwrate_to_plcp_idx(u32 rate_n_flags) | |
be663ab6 WYG |
115 | { |
116 | int idx = 0; | |
117 | ||
118 | /* HT rate format */ | |
119 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
120 | idx = (rate_n_flags & 0xff); | |
121 | ||
2eb05816 SG |
122 | if (idx >= RATE_MIMO2_6M_PLCP) |
123 | idx = idx - RATE_MIMO2_6M_PLCP; | |
be663ab6 | 124 | |
e2ebc833 | 125 | idx += IL_FIRST_OFDM_RATE; |
e7392364 | 126 | /* skip 9M not supported in ht */ |
2d09b062 | 127 | if (idx >= RATE_9M_IDX) |
be663ab6 | 128 | idx += 1; |
232913b5 | 129 | if (idx >= IL_FIRST_OFDM_RATE && idx <= IL_LAST_OFDM_RATE) |
be663ab6 WYG |
130 | return idx; |
131 | ||
e7392364 | 132 | /* legacy rate format, search for match in table */ |
be663ab6 | 133 | } else { |
d2ddf621 SG |
134 | for (idx = 0; idx < ARRAY_SIZE(il_rates); idx++) |
135 | if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) | |
be663ab6 WYG |
136 | return idx; |
137 | } | |
138 | ||
139 | return -1; | |
140 | } | |
141 | ||
46bc8d4b | 142 | static void il4965_rs_rate_scale_perform(struct il_priv *il, |
e7392364 SG |
143 | struct sk_buff *skb, |
144 | struct ieee80211_sta *sta, | |
145 | struct il_lq_sta *lq_sta); | |
46bc8d4b | 146 | static void il4965_rs_fill_link_cmd(struct il_priv *il, |
e7392364 | 147 | struct il_lq_sta *lq_sta, u32 rate_n_flags); |
e2ebc833 | 148 | static void il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, |
e7392364 | 149 | bool force_search); |
be663ab6 WYG |
150 | |
151 | #ifdef CONFIG_MAC80211_DEBUGFS | |
e2ebc833 | 152 | static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, |
1722f8e1 | 153 | u32 *rate_n_flags, int idx); |
be663ab6 | 154 | #else |
e7392364 SG |
155 | static void |
156 | il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx) | |
157 | { | |
158 | } | |
be663ab6 WYG |
159 | #endif |
160 | ||
161 | /** | |
162 | * The following tables contain the expected throughput metrics for all rates | |
163 | * | |
164 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
165 | * | |
166 | * where invalid entries are zeros. | |
167 | * | |
168 | * CCK rates are only valid in legacy table and will only be used in G | |
169 | * (2.4 GHz) band. | |
170 | */ | |
171 | ||
2eb05816 | 172 | static s32 expected_tpt_legacy[RATE_COUNT] = { |
be663ab6 WYG |
173 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 |
174 | }; | |
175 | ||
2eb05816 | 176 | static s32 expected_tpt_siso20MHz[4][RATE_COUNT] = { |
e7392364 SG |
177 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 158, 183, 193, 202}, /* Norm */ |
178 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 167, 192, 202, 210}, /* SGI */ | |
179 | {0, 0, 0, 0, 48, 0, 93, 135, 176, 251, 319, 351, 381}, /* AGG */ | |
180 | {0, 0, 0, 0, 53, 0, 102, 149, 193, 275, 348, 381, 413}, /* AGG+SGI */ | |
be663ab6 WYG |
181 | }; |
182 | ||
2eb05816 | 183 | static s32 expected_tpt_siso40MHz[4][RATE_COUNT] = { |
e7392364 SG |
184 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ |
185 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ | |
186 | {0, 0, 0, 0, 96, 0, 182, 259, 328, 451, 553, 598, 640}, /* AGG */ | |
187 | {0, 0, 0, 0, 106, 0, 199, 282, 357, 487, 593, 640, 683}, /* AGG+SGI */ | |
be663ab6 WYG |
188 | }; |
189 | ||
2eb05816 | 190 | static s32 expected_tpt_mimo2_20MHz[4][RATE_COUNT] = { |
e7392364 SG |
191 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250}, /* Norm */ |
192 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256}, /* SGI */ | |
193 | {0, 0, 0, 0, 92, 0, 175, 250, 317, 436, 534, 578, 619}, /* AGG */ | |
194 | {0, 0, 0, 0, 102, 0, 192, 273, 344, 470, 573, 619, 660}, /* AGG+SGI */ | |
be663ab6 WYG |
195 | }; |
196 | ||
2eb05816 | 197 | static s32 expected_tpt_mimo2_40MHz[4][RATE_COUNT] = { |
e7392364 SG |
198 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ |
199 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ | |
200 | {0, 0, 0, 0, 180, 0, 327, 446, 545, 708, 828, 878, 922}, /* AGG */ | |
201 | {0, 0, 0, 0, 197, 0, 355, 481, 584, 752, 872, 922, 966}, /* AGG+SGI */ | |
be663ab6 WYG |
202 | }; |
203 | ||
204 | /* mbps, mcs */ | |
2eb05816 | 205 | static const struct il_rate_mcs_info il_rate_mcs[RATE_COUNT] = { |
e7392364 SG |
206 | {"1", "BPSK DSSS"}, |
207 | {"2", "QPSK DSSS"}, | |
be663ab6 | 208 | {"5.5", "BPSK CCK"}, |
e7392364 SG |
209 | {"11", "QPSK CCK"}, |
210 | {"6", "BPSK 1/2"}, | |
211 | {"9", "BPSK 1/2"}, | |
212 | {"12", "QPSK 1/2"}, | |
213 | {"18", "QPSK 3/4"}, | |
214 | {"24", "16QAM 1/2"}, | |
215 | {"36", "16QAM 3/4"}, | |
216 | {"48", "64QAM 2/3"}, | |
217 | {"54", "64QAM 3/4"}, | |
218 | {"60", "64QAM 5/6"}, | |
be663ab6 WYG |
219 | }; |
220 | ||
2d09b062 | 221 | #define MCS_IDX_PER_STREAM (8) |
be663ab6 | 222 | |
e7392364 SG |
223 | static inline u8 |
224 | il4965_rs_extract_rate(u32 rate_n_flags) | |
be663ab6 | 225 | { |
e7392364 | 226 | return (u8) (rate_n_flags & 0xFF); |
be663ab6 WYG |
227 | } |
228 | ||
229 | static void | |
6ce1dc45 | 230 | il4965_rs_rate_scale_clear_win(struct il_rate_scale_data *win) |
be663ab6 | 231 | { |
6ce1dc45 SG |
232 | win->data = 0; |
233 | win->success_counter = 0; | |
234 | win->success_ratio = IL_INVALID_VALUE; | |
235 | win->counter = 0; | |
236 | win->average_tpt = IL_INVALID_VALUE; | |
237 | win->stamp = 0; | |
be663ab6 WYG |
238 | } |
239 | ||
e7392364 SG |
240 | static inline u8 |
241 | il4965_rs_is_valid_ant(u8 valid_antenna, u8 ant_type) | |
be663ab6 WYG |
242 | { |
243 | return (ant_type & valid_antenna) == ant_type; | |
244 | } | |
245 | ||
246 | /* | |
ebf0d90d | 247 | * removes the old data from the stats. All data that is older than |
be663ab6 WYG |
248 | * TID_MAX_TIME_DIFF, will be deleted. |
249 | */ | |
250 | static void | |
e2ebc833 | 251 | il4965_rs_tl_rm_old_stats(struct il_traffic_load *tl, u32 curr_time) |
be663ab6 WYG |
252 | { |
253 | /* The oldest age we want to keep */ | |
254 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
255 | ||
232913b5 | 256 | while (tl->queue_count && tl->time_stamp < oldest_time) { |
be663ab6 WYG |
257 | tl->total -= tl->packet_count[tl->head]; |
258 | tl->packet_count[tl->head] = 0; | |
259 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
260 | tl->queue_count--; | |
261 | tl->head++; | |
262 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
263 | tl->head = 0; | |
264 | } | |
265 | } | |
266 | ||
267 | /* | |
268 | * increment traffic load value for tid and also remove | |
269 | * any old values if passed the certain time period | |
270 | */ | |
e7392364 SG |
271 | static u8 |
272 | il4965_rs_tl_add_packet(struct il_lq_sta *lq_data, struct ieee80211_hdr *hdr) | |
be663ab6 WYG |
273 | { |
274 | u32 curr_time = jiffies_to_msecs(jiffies); | |
275 | u32 time_diff; | |
0c2c8852 | 276 | s32 idx; |
e2ebc833 | 277 | struct il_traffic_load *tl = NULL; |
be663ab6 WYG |
278 | u8 tid; |
279 | ||
280 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
281 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
282 | tid = qc[0] & 0xf; | |
283 | } else | |
284 | return MAX_TID_COUNT; | |
285 | ||
286 | if (unlikely(tid >= TID_MAX_LOAD_COUNT)) | |
287 | return MAX_TID_COUNT; | |
288 | ||
289 | tl = &lq_data->load[tid]; | |
290 | ||
291 | curr_time -= curr_time % TID_ROUND_VALUE; | |
292 | ||
293 | /* Happens only for the first packet. Initialize the data */ | |
294 | if (!(tl->queue_count)) { | |
295 | tl->total = 1; | |
296 | tl->time_stamp = curr_time; | |
297 | tl->queue_count = 1; | |
298 | tl->head = 0; | |
299 | tl->packet_count[0] = 1; | |
300 | return MAX_TID_COUNT; | |
301 | } | |
302 | ||
303 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
0c2c8852 | 304 | idx = time_diff / TID_QUEUE_CELL_SPACING; |
be663ab6 WYG |
305 | |
306 | /* The history is too long: remove data that is older than */ | |
307 | /* TID_MAX_TIME_DIFF */ | |
0c2c8852 | 308 | if (idx >= TID_QUEUE_MAX_SIZE) |
e2ebc833 | 309 | il4965_rs_tl_rm_old_stats(tl, curr_time); |
be663ab6 | 310 | |
0c2c8852 SG |
311 | idx = (tl->head + idx) % TID_QUEUE_MAX_SIZE; |
312 | tl->packet_count[idx] = tl->packet_count[idx] + 1; | |
be663ab6 WYG |
313 | tl->total = tl->total + 1; |
314 | ||
0c2c8852 SG |
315 | if ((idx + 1) > tl->queue_count) |
316 | tl->queue_count = idx + 1; | |
be663ab6 WYG |
317 | |
318 | return tid; | |
319 | } | |
320 | ||
321 | /* | |
322 | get the traffic load value for tid | |
323 | */ | |
e7392364 SG |
324 | static u32 |
325 | il4965_rs_tl_get_load(struct il_lq_sta *lq_data, u8 tid) | |
be663ab6 WYG |
326 | { |
327 | u32 curr_time = jiffies_to_msecs(jiffies); | |
328 | u32 time_diff; | |
0c2c8852 | 329 | s32 idx; |
e2ebc833 | 330 | struct il_traffic_load *tl = NULL; |
be663ab6 WYG |
331 | |
332 | if (tid >= TID_MAX_LOAD_COUNT) | |
333 | return 0; | |
334 | ||
335 | tl = &(lq_data->load[tid]); | |
336 | ||
337 | curr_time -= curr_time % TID_ROUND_VALUE; | |
338 | ||
339 | if (!(tl->queue_count)) | |
340 | return 0; | |
341 | ||
342 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
0c2c8852 | 343 | idx = time_diff / TID_QUEUE_CELL_SPACING; |
be663ab6 WYG |
344 | |
345 | /* The history is too long: remove data that is older than */ | |
346 | /* TID_MAX_TIME_DIFF */ | |
0c2c8852 | 347 | if (idx >= TID_QUEUE_MAX_SIZE) |
e2ebc833 | 348 | il4965_rs_tl_rm_old_stats(tl, curr_time); |
be663ab6 WYG |
349 | |
350 | return tl->total; | |
351 | } | |
352 | ||
e7392364 SG |
353 | static int |
354 | il4965_rs_tl_turn_on_agg_for_tid(struct il_priv *il, struct il_lq_sta *lq_data, | |
355 | u8 tid, struct ieee80211_sta *sta) | |
be663ab6 WYG |
356 | { |
357 | int ret = -EAGAIN; | |
358 | u32 load; | |
359 | ||
e2ebc833 | 360 | load = il4965_rs_tl_get_load(lq_data, tid); |
be663ab6 | 361 | |
e2ebc833 | 362 | if (load > IL_AGG_LOAD_THRESHOLD) { |
e7392364 | 363 | D_HT("Starting Tx agg: STA: %pM tid: %d\n", sta->addr, tid); |
be663ab6 WYG |
364 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); |
365 | if (ret == -EAGAIN) { | |
366 | /* | |
367 | * driver and mac80211 is out of sync | |
368 | * this might be cause by reloading firmware | |
369 | * stop the tx ba session here | |
370 | */ | |
e7392364 | 371 | IL_ERR("Fail start Tx agg on tid: %d\n", tid); |
be663ab6 WYG |
372 | ieee80211_stop_tx_ba_session(sta, tid); |
373 | } | |
dd44eb9e GD |
374 | } else |
375 | D_HT("Aggregation not enabled for tid %d because load = %u\n", | |
376 | tid, load); | |
377 | ||
be663ab6 WYG |
378 | return ret; |
379 | } | |
380 | ||
e7392364 SG |
381 | static void |
382 | il4965_rs_tl_turn_on_agg(struct il_priv *il, u8 tid, struct il_lq_sta *lq_data, | |
383 | struct ieee80211_sta *sta) | |
be663ab6 WYG |
384 | { |
385 | if (tid < TID_MAX_LOAD_COUNT) | |
46bc8d4b | 386 | il4965_rs_tl_turn_on_agg_for_tid(il, lq_data, tid, sta); |
be663ab6 | 387 | else |
e7392364 SG |
388 | IL_ERR("tid exceeds max load count: %d/%d\n", tid, |
389 | TID_MAX_LOAD_COUNT); | |
be663ab6 WYG |
390 | } |
391 | ||
e7392364 SG |
392 | static inline int |
393 | il4965_get_il4965_num_of_ant_from_rate(u32 rate_n_flags) | |
be663ab6 WYG |
394 | { |
395 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
e7392364 SG |
396 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + |
397 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
be663ab6 WYG |
398 | } |
399 | ||
400 | /* | |
e2ebc833 | 401 | * Static function to get the expected throughput from an il_scale_tbl_info |
be663ab6 WYG |
402 | * that wraps a NULL pointer check |
403 | */ | |
404 | static s32 | |
0c2c8852 | 405 | il4965_get_expected_tpt(struct il_scale_tbl_info *tbl, int rs_idx) |
be663ab6 WYG |
406 | { |
407 | if (tbl->expected_tpt) | |
0c2c8852 | 408 | return tbl->expected_tpt[rs_idx]; |
be663ab6 WYG |
409 | return 0; |
410 | } | |
411 | ||
412 | /** | |
6ce1dc45 | 413 | * il4965_rs_collect_tx_data - Update the success/failure sliding win |
be663ab6 | 414 | * |
6ce1dc45 SG |
415 | * We keep a sliding win of the last 62 packets transmitted |
416 | * at this rate. win->data contains the bitmask of successful | |
be663ab6 WYG |
417 | * packets. |
418 | */ | |
e7392364 SG |
419 | static int |
420 | il4965_rs_collect_tx_data(struct il_scale_tbl_info *tbl, int scale_idx, | |
421 | int attempts, int successes) | |
be663ab6 | 422 | { |
6ce1dc45 | 423 | struct il_rate_scale_data *win = NULL; |
e7392364 | 424 | static const u64 mask = (((u64) 1) << (RATE_MAX_WINDOW - 1)); |
be663ab6 WYG |
425 | s32 fail_count, tpt; |
426 | ||
0c2c8852 | 427 | if (scale_idx < 0 || scale_idx >= RATE_COUNT) |
be663ab6 WYG |
428 | return -EINVAL; |
429 | ||
6ce1dc45 | 430 | /* Select win for current tx bit rate */ |
0c2c8852 | 431 | win = &(tbl->win[scale_idx]); |
be663ab6 WYG |
432 | |
433 | /* Get expected throughput */ | |
0c2c8852 | 434 | tpt = il4965_get_expected_tpt(tbl, scale_idx); |
be663ab6 WYG |
435 | |
436 | /* | |
437 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
6ce1dc45 SG |
438 | * history win; anything older isn't really relevant any more. |
439 | * If we have filled up the sliding win, drop the oldest attempt; | |
be663ab6 WYG |
440 | * if the oldest attempt (highest bit in bitmap) shows "success", |
441 | * subtract "1" from the success counter (this is the main reason | |
442 | * we keep these bitmaps!). | |
443 | */ | |
444 | while (attempts > 0) { | |
2eb05816 | 445 | if (win->counter >= RATE_MAX_WINDOW) { |
be663ab6 WYG |
446 | |
447 | /* remove earliest */ | |
2eb05816 | 448 | win->counter = RATE_MAX_WINDOW - 1; |
be663ab6 | 449 | |
6ce1dc45 SG |
450 | if (win->data & mask) { |
451 | win->data &= ~mask; | |
452 | win->success_counter--; | |
be663ab6 WYG |
453 | } |
454 | } | |
455 | ||
456 | /* Increment frames-attempted counter */ | |
6ce1dc45 | 457 | win->counter++; |
be663ab6 WYG |
458 | |
459 | /* Shift bitmap by one frame to throw away oldest history */ | |
6ce1dc45 | 460 | win->data <<= 1; |
be663ab6 WYG |
461 | |
462 | /* Mark the most recent #successes attempts as successful */ | |
463 | if (successes > 0) { | |
6ce1dc45 SG |
464 | win->success_counter++; |
465 | win->data |= 0x1; | |
be663ab6 WYG |
466 | successes--; |
467 | } | |
468 | ||
469 | attempts--; | |
470 | } | |
471 | ||
472 | /* Calculate current success ratio, avoid divide-by-0! */ | |
6ce1dc45 | 473 | if (win->counter > 0) |
e7392364 SG |
474 | win->success_ratio = |
475 | 128 * (100 * win->success_counter) / win->counter; | |
be663ab6 | 476 | else |
6ce1dc45 | 477 | win->success_ratio = IL_INVALID_VALUE; |
be663ab6 | 478 | |
6ce1dc45 | 479 | fail_count = win->counter - win->success_counter; |
be663ab6 WYG |
480 | |
481 | /* Calculate average throughput, if we have enough history. */ | |
2eb05816 SG |
482 | if (fail_count >= RATE_MIN_FAILURE_TH || |
483 | win->success_counter >= RATE_MIN_SUCCESS_TH) | |
6ce1dc45 | 484 | win->average_tpt = (win->success_ratio * tpt + 64) / 128; |
be663ab6 | 485 | else |
6ce1dc45 | 486 | win->average_tpt = IL_INVALID_VALUE; |
be663ab6 | 487 | |
6ce1dc45 SG |
488 | /* Tag this win as having been updated */ |
489 | win->stamp = jiffies; | |
be663ab6 WYG |
490 | |
491 | return 0; | |
492 | } | |
493 | ||
494 | /* | |
495 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
496 | */ | |
e7392364 SG |
497 | static u32 |
498 | il4965_rate_n_flags_from_tbl(struct il_priv *il, struct il_scale_tbl_info *tbl, | |
499 | int idx, u8 use_green) | |
be663ab6 WYG |
500 | { |
501 | u32 rate_n_flags = 0; | |
502 | ||
503 | if (is_legacy(tbl->lq_type)) { | |
0c2c8852 SG |
504 | rate_n_flags = il_rates[idx].plcp; |
505 | if (idx >= IL_FIRST_CCK_RATE && idx <= IL_LAST_CCK_RATE) | |
be663ab6 WYG |
506 | rate_n_flags |= RATE_MCS_CCK_MSK; |
507 | ||
508 | } else if (is_Ht(tbl->lq_type)) { | |
0c2c8852 SG |
509 | if (idx > IL_LAST_OFDM_RATE) { |
510 | IL_ERR("Invalid HT rate idx %d\n", idx); | |
511 | idx = IL_LAST_OFDM_RATE; | |
be663ab6 WYG |
512 | } |
513 | rate_n_flags = RATE_MCS_HT_MSK; | |
514 | ||
515 | if (is_siso(tbl->lq_type)) | |
e7392364 | 516 | rate_n_flags |= il_rates[idx].plcp_siso; |
be663ab6 | 517 | else |
e7392364 | 518 | rate_n_flags |= il_rates[idx].plcp_mimo2; |
be663ab6 | 519 | } else { |
9406f797 | 520 | IL_ERR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
be663ab6 WYG |
521 | } |
522 | ||
e7392364 SG |
523 | rate_n_flags |= |
524 | ((tbl->ant_type << RATE_MCS_ANT_POS) & RATE_MCS_ANT_ABC_MSK); | |
be663ab6 WYG |
525 | |
526 | if (is_Ht(tbl->lq_type)) { | |
527 | if (tbl->is_ht40) { | |
528 | if (tbl->is_dup) | |
529 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
530 | else | |
531 | rate_n_flags |= RATE_MCS_HT40_MSK; | |
532 | } | |
533 | if (tbl->is_SGI) | |
534 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
535 | ||
536 | if (use_green) { | |
537 | rate_n_flags |= RATE_MCS_GF_MSK; | |
538 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
539 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
9406f797 | 540 | IL_ERR("GF was set with SGI:SISO\n"); |
be663ab6 WYG |
541 | } |
542 | } | |
543 | } | |
544 | return rate_n_flags; | |
545 | } | |
546 | ||
547 | /* | |
548 | * Interpret uCode API's rate_n_flags format, | |
549 | * fill "search" or "active" tx mode table. | |
550 | */ | |
e7392364 SG |
551 | static int |
552 | il4965_rs_get_tbl_info_from_mcs(const u32 rate_n_flags, | |
553 | enum ieee80211_band band, | |
554 | struct il_scale_tbl_info *tbl, int *rate_idx) | |
be663ab6 WYG |
555 | { |
556 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); | |
e7392364 SG |
557 | u8 il4965_num_of_ant = |
558 | il4965_get_il4965_num_of_ant_from_rate(rate_n_flags); | |
be663ab6 WYG |
559 | u8 mcs; |
560 | ||
e2ebc833 SG |
561 | memset(tbl, 0, sizeof(struct il_scale_tbl_info)); |
562 | *rate_idx = il4965_hwrate_to_plcp_idx(rate_n_flags); | |
be663ab6 | 563 | |
e7392364 | 564 | if (*rate_idx == RATE_INVALID) { |
be663ab6 WYG |
565 | *rate_idx = -1; |
566 | return -EINVAL; | |
567 | } | |
568 | tbl->is_SGI = 0; /* default legacy setup */ | |
569 | tbl->is_ht40 = 0; | |
570 | tbl->is_dup = 0; | |
571 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); | |
572 | tbl->lq_type = LQ_NONE; | |
e2ebc833 | 573 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
574 | |
575 | /* legacy rate format */ | |
576 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { | |
e2ebc833 | 577 | if (il4965_num_of_ant == 1) { |
be663ab6 WYG |
578 | if (band == IEEE80211_BAND_5GHZ) |
579 | tbl->lq_type = LQ_A; | |
580 | else | |
581 | tbl->lq_type = LQ_G; | |
582 | } | |
e7392364 | 583 | /* HT rate format */ |
be663ab6 WYG |
584 | } else { |
585 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
586 | tbl->is_SGI = 1; | |
587 | ||
588 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || | |
589 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
590 | tbl->is_ht40 = 1; | |
591 | ||
592 | if (rate_n_flags & RATE_MCS_DUP_MSK) | |
593 | tbl->is_dup = 1; | |
594 | ||
e2ebc833 | 595 | mcs = il4965_rs_extract_rate(rate_n_flags); |
be663ab6 WYG |
596 | |
597 | /* SISO */ | |
2eb05816 | 598 | if (mcs <= RATE_SISO_60M_PLCP) { |
e2ebc833 | 599 | if (il4965_num_of_ant == 1) |
e7392364 SG |
600 | tbl->lq_type = LQ_SISO; /*else NONE */ |
601 | /* MIMO2 */ | |
be663ab6 | 602 | } else { |
e2ebc833 | 603 | if (il4965_num_of_ant == 2) |
be663ab6 WYG |
604 | tbl->lq_type = LQ_MIMO2; |
605 | } | |
606 | } | |
607 | return 0; | |
608 | } | |
609 | ||
610 | /* switch to another antenna/antennas and return 1 */ | |
611 | /* if no other valid antenna found, return 0 */ | |
e7392364 | 612 | static int |
1722f8e1 | 613 | il4965_rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, |
e7392364 | 614 | struct il_scale_tbl_info *tbl) |
be663ab6 WYG |
615 | { |
616 | u8 new_ant_type; | |
617 | ||
618 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
619 | return 0; | |
620 | ||
e2ebc833 | 621 | if (!il4965_rs_is_valid_ant(valid_ant, tbl->ant_type)) |
be663ab6 WYG |
622 | return 0; |
623 | ||
624 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
625 | ||
232913b5 | 626 | while (new_ant_type != tbl->ant_type && |
e2ebc833 | 627 | !il4965_rs_is_valid_ant(valid_ant, new_ant_type)) |
be663ab6 WYG |
628 | new_ant_type = ant_toggle_lookup[new_ant_type]; |
629 | ||
630 | if (new_ant_type == tbl->ant_type) | |
631 | return 0; | |
632 | ||
633 | tbl->ant_type = new_ant_type; | |
634 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
635 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
636 | return 1; | |
637 | } | |
638 | ||
639 | /** | |
640 | * Green-field mode is valid if the station supports it and | |
641 | * there are no non-GF stations present in the BSS. | |
642 | */ | |
e7392364 | 643 | static bool |
1c03c462 | 644 | il4965_rs_use_green(struct il_priv *il, struct ieee80211_sta *sta) |
be663ab6 | 645 | { |
be663ab6 | 646 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
1c03c462 | 647 | !il->ht.non_gf_sta_present; |
be663ab6 WYG |
648 | } |
649 | ||
650 | /** | |
e2ebc833 | 651 | * il4965_rs_get_supported_rates - get the available rates |
be663ab6 WYG |
652 | * |
653 | * if management frame or broadcast frame only return | |
654 | * basic available rates. | |
655 | * | |
656 | */ | |
e7392364 SG |
657 | static u16 |
658 | il4965_rs_get_supported_rates(struct il_lq_sta *lq_sta, | |
659 | struct ieee80211_hdr *hdr, | |
660 | enum il_table_type rate_type) | |
be663ab6 WYG |
661 | { |
662 | if (is_legacy(rate_type)) { | |
663 | return lq_sta->active_legacy_rate; | |
664 | } else { | |
665 | if (is_siso(rate_type)) | |
666 | return lq_sta->active_siso_rate; | |
667 | else | |
668 | return lq_sta->active_mimo2_rate; | |
669 | } | |
670 | } | |
671 | ||
672 | static u16 | |
0c2c8852 | 673 | il4965_rs_get_adjacent_rate(struct il_priv *il, u8 idx, u16 rate_mask, |
e7392364 | 674 | int rate_type) |
be663ab6 | 675 | { |
2eb05816 SG |
676 | u8 high = RATE_INVALID; |
677 | u8 low = RATE_INVALID; | |
be663ab6 WYG |
678 | |
679 | /* 802.11A or ht walks to the next literal adjacent rate in | |
680 | * the rate table */ | |
681 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
682 | int i; | |
683 | u32 mask; | |
684 | ||
685 | /* Find the previous rate that is in the rate mask */ | |
0c2c8852 | 686 | i = idx - 1; |
be663ab6 WYG |
687 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { |
688 | if (rate_mask & mask) { | |
689 | low = i; | |
690 | break; | |
691 | } | |
692 | } | |
693 | ||
694 | /* Find the next rate that is in the rate mask */ | |
0c2c8852 | 695 | i = idx + 1; |
2eb05816 | 696 | for (mask = (1 << i); i < RATE_COUNT; i++, mask <<= 1) { |
be663ab6 WYG |
697 | if (rate_mask & mask) { |
698 | high = i; | |
699 | break; | |
700 | } | |
701 | } | |
702 | ||
703 | return (high << 8) | low; | |
704 | } | |
705 | ||
0c2c8852 | 706 | low = idx; |
2eb05816 | 707 | while (low != RATE_INVALID) { |
d2ddf621 | 708 | low = il_rates[low].prev_rs; |
2eb05816 | 709 | if (low == RATE_INVALID) |
be663ab6 WYG |
710 | break; |
711 | if (rate_mask & (1 << low)) | |
712 | break; | |
58de00a4 | 713 | D_RATE("Skipping masked lower rate: %d\n", low); |
be663ab6 WYG |
714 | } |
715 | ||
0c2c8852 | 716 | high = idx; |
2eb05816 | 717 | while (high != RATE_INVALID) { |
d2ddf621 | 718 | high = il_rates[high].next_rs; |
2eb05816 | 719 | if (high == RATE_INVALID) |
be663ab6 WYG |
720 | break; |
721 | if (rate_mask & (1 << high)) | |
722 | break; | |
58de00a4 | 723 | D_RATE("Skipping masked higher rate: %d\n", high); |
be663ab6 WYG |
724 | } |
725 | ||
726 | return (high << 8) | low; | |
727 | } | |
728 | ||
e7392364 SG |
729 | static u32 |
730 | il4965_rs_get_lower_rate(struct il_lq_sta *lq_sta, | |
731 | struct il_scale_tbl_info *tbl, u8 scale_idx, | |
732 | u8 ht_possible) | |
be663ab6 WYG |
733 | { |
734 | s32 low; | |
735 | u16 rate_mask; | |
736 | u16 high_low; | |
737 | u8 switch_to_legacy = 0; | |
738 | u8 is_green = lq_sta->is_green; | |
46bc8d4b | 739 | struct il_priv *il = lq_sta->drv; |
be663ab6 WYG |
740 | |
741 | /* check if we need to switch from HT to legacy rates. | |
742 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
743 | * are always supported (spec demand) */ | |
0c2c8852 | 744 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_idx)) { |
be663ab6 | 745 | switch_to_legacy = 1; |
0c2c8852 | 746 | scale_idx = rs_ht_to_legacy[scale_idx]; |
be663ab6 WYG |
747 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
748 | tbl->lq_type = LQ_A; | |
749 | else | |
750 | tbl->lq_type = LQ_G; | |
751 | ||
e2ebc833 | 752 | if (il4965_num_of_ant(tbl->ant_type) > 1) |
be663ab6 | 753 | tbl->ant_type = |
e7392364 | 754 | il4965_first_antenna(il->hw_params.valid_tx_ant); |
be663ab6 WYG |
755 | |
756 | tbl->is_ht40 = 0; | |
757 | tbl->is_SGI = 0; | |
e2ebc833 | 758 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
759 | } |
760 | ||
e2ebc833 | 761 | rate_mask = il4965_rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
be663ab6 WYG |
762 | |
763 | /* Mask with station rate restriction */ | |
764 | if (is_legacy(tbl->lq_type)) { | |
765 | /* supp_rates has no CCK bits in A mode */ | |
766 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
e7392364 SG |
767 | rate_mask = |
768 | (u16) (rate_mask & | |
769 | (lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); | |
be663ab6 | 770 | else |
e7392364 | 771 | rate_mask = (u16) (rate_mask & lq_sta->supp_rates); |
be663ab6 WYG |
772 | } |
773 | ||
774 | /* If we switched from HT to legacy, check current rate */ | |
0c2c8852 SG |
775 | if (switch_to_legacy && (rate_mask & (1 << scale_idx))) { |
776 | low = scale_idx; | |
be663ab6 WYG |
777 | goto out; |
778 | } | |
779 | ||
e7392364 SG |
780 | high_low = |
781 | il4965_rs_get_adjacent_rate(lq_sta->drv, scale_idx, rate_mask, | |
be663ab6 WYG |
782 | tbl->lq_type); |
783 | low = high_low & 0xff; | |
784 | ||
2eb05816 | 785 | if (low == RATE_INVALID) |
0c2c8852 | 786 | low = scale_idx; |
be663ab6 WYG |
787 | |
788 | out: | |
e2ebc833 | 789 | return il4965_rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
be663ab6 WYG |
790 | } |
791 | ||
792 | /* | |
793 | * Simple function to compare two rate scale table types | |
794 | */ | |
e7392364 SG |
795 | static bool |
796 | il4965_table_type_matches(struct il_scale_tbl_info *a, | |
797 | struct il_scale_tbl_info *b) | |
be663ab6 | 798 | { |
232913b5 SG |
799 | return (a->lq_type == b->lq_type && a->ant_type == b->ant_type && |
800 | a->is_SGI == b->is_SGI); | |
be663ab6 WYG |
801 | } |
802 | ||
803 | /* | |
804 | * mac80211 sends us Tx status | |
805 | */ | |
806 | static void | |
46bc8d4b | 807 | il4965_rs_tx_status(void *il_r, struct ieee80211_supported_band *sband, |
e7392364 SG |
808 | struct ieee80211_sta *sta, void *il_sta, |
809 | struct sk_buff *skb) | |
be663ab6 WYG |
810 | { |
811 | int legacy_success; | |
812 | int retries; | |
0c2c8852 | 813 | int rs_idx, mac_idx, i; |
46bc8d4b | 814 | struct il_lq_sta *lq_sta = il_sta; |
e2ebc833 | 815 | struct il_link_quality_cmd *table; |
be663ab6 | 816 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
46bc8d4b | 817 | struct il_priv *il = (struct il_priv *)il_r; |
be663ab6 WYG |
818 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
819 | enum mac80211_rate_control_flags mac_flags; | |
820 | u32 tx_rate; | |
e2ebc833 SG |
821 | struct il_scale_tbl_info tbl_type; |
822 | struct il_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; | |
be663ab6 | 823 | |
e7392364 | 824 | D_RATE("get frame ack response, update rate scale win\n"); |
be663ab6 WYG |
825 | |
826 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
827 | if (!lq_sta) { | |
58de00a4 | 828 | D_RATE("Station rate scaling not created yet.\n"); |
be663ab6 WYG |
829 | return; |
830 | } else if (!lq_sta->drv) { | |
58de00a4 | 831 | D_RATE("Rate scaling not initialized yet.\n"); |
be663ab6 WYG |
832 | return; |
833 | } | |
834 | ||
835 | if (!ieee80211_is_data(hdr->frame_control) || | |
232913b5 | 836 | (info->flags & IEEE80211_TX_CTL_NO_ACK)) |
be663ab6 WYG |
837 | return; |
838 | ||
839 | /* This packet was aggregated but doesn't carry status info */ | |
840 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
841 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
842 | return; | |
843 | ||
844 | /* | |
845 | * Ignore this Tx frame response if its initial rate doesn't match | |
846 | * that of latest Link Quality command. There may be stragglers | |
847 | * from a previous Link Quality command, but we're no longer interested | |
848 | * in those; they're either from the "active" mode while we're trying | |
849 | * to check "search" mode, or a prior "search" mode after we've moved | |
850 | * to a new "search" mode (which might become the new "active" mode). | |
851 | */ | |
852 | table = &lq_sta->lq; | |
853 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
e7392364 | 854 | il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type, &rs_idx); |
46bc8d4b | 855 | if (il->band == IEEE80211_BAND_5GHZ) |
0c2c8852 | 856 | rs_idx -= IL_FIRST_OFDM_RATE; |
be663ab6 | 857 | mac_flags = info->status.rates[0].flags; |
0c2c8852 | 858 | mac_idx = info->status.rates[0].idx; |
be663ab6 WYG |
859 | /* For HT packets, map MCS to PLCP */ |
860 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
0c2c8852 SG |
861 | mac_idx &= RATE_MCS_CODE_MSK; /* Remove # of streams */ |
862 | if (mac_idx >= (RATE_9M_IDX - IL_FIRST_OFDM_RATE)) | |
863 | mac_idx++; | |
be663ab6 | 864 | /* |
0c2c8852 | 865 | * mac80211 HT idx is always zero-idxed; we need to move |
be663ab6 WYG |
866 | * HT OFDM rates after CCK rates in 2.4 GHz band |
867 | */ | |
46bc8d4b | 868 | if (il->band == IEEE80211_BAND_2GHZ) |
0c2c8852 | 869 | mac_idx += IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
870 | } |
871 | /* Here we actually compare this rate to the latest LQ command */ | |
0c2c8852 | 872 | if (mac_idx < 0 || |
232913b5 SG |
873 | tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI) || |
874 | tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH) || | |
875 | tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA) || | |
d748b464 | 876 | tbl_type.ant_type != info->status.antenna || |
e7392364 SG |
877 | !!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS) |
878 | || !!(tx_rate & RATE_MCS_GF_MSK) != | |
879 | !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD) || rs_idx != mac_idx) { | |
880 | D_RATE("initial rate %d does not match %d (0x%x)\n", mac_idx, | |
881 | rs_idx, tx_rate); | |
be663ab6 WYG |
882 | /* |
883 | * Since rates mis-match, the last LQ command may have failed. | |
e2ebc833 | 884 | * After IL_MISSED_RATE_MAX mis-matches, resync the uCode with |
be663ab6 WYG |
885 | * ... driver. |
886 | */ | |
887 | lq_sta->missed_rate_counter++; | |
e2ebc833 | 888 | if (lq_sta->missed_rate_counter > IL_MISSED_RATE_MAX) { |
be663ab6 | 889 | lq_sta->missed_rate_counter = 0; |
83007196 | 890 | il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false); |
be663ab6 WYG |
891 | } |
892 | /* Regardless, ignore this status info for outdated rate */ | |
893 | return; | |
894 | } else | |
895 | /* Rate did match, so reset the missed_rate_counter */ | |
896 | lq_sta->missed_rate_counter = 0; | |
897 | ||
898 | /* Figure out if rate scale algorithm is in active or search table */ | |
e7392364 SG |
899 | if (il4965_table_type_matches |
900 | (&tbl_type, &(lq_sta->lq_info[lq_sta->active_tbl]))) { | |
be663ab6 WYG |
901 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
902 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
e7392364 SG |
903 | } else |
904 | if (il4965_table_type_matches | |
905 | (&tbl_type, &lq_sta->lq_info[1 - lq_sta->active_tbl])) { | |
be663ab6 WYG |
906 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
907 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
908 | } else { | |
e7392364 | 909 | D_RATE("Neither active nor search matches tx rate\n"); |
be663ab6 | 910 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
e7392364 SG |
911 | D_RATE("active- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type, |
912 | tmp_tbl->ant_type, tmp_tbl->is_SGI); | |
be663ab6 | 913 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
e7392364 SG |
914 | D_RATE("search- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type, |
915 | tmp_tbl->ant_type, tmp_tbl->is_SGI); | |
916 | D_RATE("actual- lq:%x, ant:%x, SGI:%d\n", tbl_type.lq_type, | |
917 | tbl_type.ant_type, tbl_type.is_SGI); | |
be663ab6 WYG |
918 | /* |
919 | * no matching table found, let's by-pass the data collection | |
920 | * and continue to perform rate scale to find the rate table | |
921 | */ | |
e2ebc833 | 922 | il4965_rs_stay_in_table(lq_sta, true); |
be663ab6 WYG |
923 | goto done; |
924 | } | |
925 | ||
926 | /* | |
927 | * Updating the frame history depends on whether packets were | |
928 | * aggregated. | |
929 | * | |
930 | * For aggregation, all packets were transmitted at the same rate, the | |
0c2c8852 | 931 | * first idx into rate scale table. |
be663ab6 WYG |
932 | */ |
933 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
934 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
46bc8d4b | 935 | il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type, |
e7392364 | 936 | &rs_idx); |
0c2c8852 | 937 | il4965_rs_collect_tx_data(curr_tbl, rs_idx, |
e7392364 SG |
938 | info->status.ampdu_len, |
939 | info->status.ampdu_ack_len); | |
be663ab6 WYG |
940 | |
941 | /* Update success/fail counts if not searching for new mode */ | |
942 | if (lq_sta->stay_in_tbl) { | |
943 | lq_sta->total_success += info->status.ampdu_ack_len; | |
e7392364 SG |
944 | lq_sta->total_failed += |
945 | (info->status.ampdu_len - | |
946 | info->status.ampdu_ack_len); | |
be663ab6 WYG |
947 | } |
948 | } else { | |
e7392364 SG |
949 | /* |
950 | * For legacy, update frame history with for each Tx retry. | |
951 | */ | |
be663ab6 WYG |
952 | retries = info->status.rates[0].count - 1; |
953 | /* HW doesn't send more than 15 retries */ | |
954 | retries = min(retries, 15); | |
955 | ||
956 | /* The last transmission may have been successful */ | |
957 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
958 | /* Collect data for each rate used during failed TX attempts */ | |
959 | for (i = 0; i <= retries; ++i) { | |
960 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
46bc8d4b | 961 | il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, |
e7392364 | 962 | &tbl_type, &rs_idx); |
be663ab6 WYG |
963 | /* |
964 | * Only collect stats if retried rate is in the same RS | |
965 | * table as active/search. | |
966 | */ | |
e2ebc833 | 967 | if (il4965_table_type_matches(&tbl_type, curr_tbl)) |
be663ab6 | 968 | tmp_tbl = curr_tbl; |
e7392364 SG |
969 | else if (il4965_table_type_matches |
970 | (&tbl_type, other_tbl)) | |
be663ab6 WYG |
971 | tmp_tbl = other_tbl; |
972 | else | |
973 | continue; | |
0c2c8852 | 974 | il4965_rs_collect_tx_data(tmp_tbl, rs_idx, 1, |
e7392364 SG |
975 | i < |
976 | retries ? 0 : legacy_success); | |
be663ab6 WYG |
977 | } |
978 | ||
979 | /* Update success/fail counts if not searching for new mode */ | |
980 | if (lq_sta->stay_in_tbl) { | |
981 | lq_sta->total_success += legacy_success; | |
982 | lq_sta->total_failed += retries + (1 - legacy_success); | |
983 | } | |
984 | } | |
985 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
986 | lq_sta->last_rate_n_flags = tx_rate; | |
987 | done: | |
988 | /* See if there's a better rate or modulation mode to try. */ | |
da6134d2 | 989 | if (sta->supp_rates[sband->band]) |
46bc8d4b | 990 | il4965_rs_rate_scale_perform(il, skb, sta, lq_sta); |
be663ab6 WYG |
991 | } |
992 | ||
993 | /* | |
994 | * Begin a period of staying with a selected modulation mode. | |
995 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
996 | * Set frame tx success limits according to legacy vs. high-throughput, | |
ebf0d90d | 997 | * and reset overall (spanning all rates) tx success history stats. |
be663ab6 WYG |
998 | * These control how long we stay using same modulation mode before |
999 | * searching for a new mode. | |
1000 | */ | |
e7392364 SG |
1001 | static void |
1002 | il4965_rs_set_stay_in_table(struct il_priv *il, u8 is_legacy, | |
1003 | struct il_lq_sta *lq_sta) | |
be663ab6 | 1004 | { |
58de00a4 | 1005 | D_RATE("we are staying in the same table\n"); |
be663ab6 WYG |
1006 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
1007 | if (is_legacy) { | |
3b98c7f4 | 1008 | lq_sta->table_count_limit = IL_LEGACY_TBL_COUNT; |
e2ebc833 SG |
1009 | lq_sta->max_failure_limit = IL_LEGACY_FAILURE_LIMIT; |
1010 | lq_sta->max_success_limit = IL_LEGACY_SUCCESS_LIMIT; | |
be663ab6 | 1011 | } else { |
3b98c7f4 | 1012 | lq_sta->table_count_limit = IL_NONE_LEGACY_TBL_COUNT; |
e2ebc833 SG |
1013 | lq_sta->max_failure_limit = IL_NONE_LEGACY_FAILURE_LIMIT; |
1014 | lq_sta->max_success_limit = IL_NONE_LEGACY_SUCCESS_LIMIT; | |
be663ab6 WYG |
1015 | } |
1016 | lq_sta->table_count = 0; | |
1017 | lq_sta->total_failed = 0; | |
1018 | lq_sta->total_success = 0; | |
1019 | lq_sta->flush_timer = jiffies; | |
1020 | lq_sta->action_counter = 0; | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * Find correct throughput table for given mode of modulation | |
1025 | */ | |
e7392364 SG |
1026 | static void |
1027 | il4965_rs_set_expected_tpt_table(struct il_lq_sta *lq_sta, | |
1028 | struct il_scale_tbl_info *tbl) | |
be663ab6 WYG |
1029 | { |
1030 | /* Used to choose among HT tables */ | |
e7392364 | 1031 | s32(*ht_tbl_pointer)[RATE_COUNT]; |
be663ab6 WYG |
1032 | |
1033 | /* Check for invalid LQ type */ | |
1034 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
1035 | tbl->expected_tpt = expected_tpt_legacy; | |
1036 | return; | |
1037 | } | |
1038 | ||
1039 | /* Legacy rates have only one table */ | |
1040 | if (is_legacy(tbl->lq_type)) { | |
1041 | tbl->expected_tpt = expected_tpt_legacy; | |
1042 | return; | |
1043 | } | |
1044 | ||
1045 | /* Choose among many HT tables depending on number of streams | |
1046 | * (SISO/MIMO2), channel width (20/40), SGI, and aggregation | |
1047 | * status */ | |
1048 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1049 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
1050 | else if (is_siso(tbl->lq_type)) | |
1051 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
1052 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1053 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
e7392364 | 1054 | else /* if (is_mimo2(tbl->lq_type)) <-- must be true */ |
be663ab6 WYG |
1055 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; |
1056 | ||
e7392364 | 1057 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ |
be663ab6 WYG |
1058 | tbl->expected_tpt = ht_tbl_pointer[0]; |
1059 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
1060 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
1061 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
1062 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
e7392364 | 1063 | else /* AGG+SGI */ |
be663ab6 WYG |
1064 | tbl->expected_tpt = ht_tbl_pointer[3]; |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1069 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1070 | * above the current measured throughput of "active" mode, to give new mode | |
1071 | * a fair chance to prove itself without too many challenges. | |
1072 | * | |
1073 | * This gets called when transitioning to more aggressive modulation | |
1074 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1075 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1076 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1077 | * bit rate will typically need to increase, but not if performance was bad. | |
1078 | */ | |
e7392364 | 1079 | static s32 |
1722f8e1 SG |
1080 | il4965_rs_get_best_rate(struct il_priv *il, struct il_lq_sta *lq_sta, |
1081 | struct il_scale_tbl_info *tbl, /* "search" */ | |
e7392364 | 1082 | u16 rate_mask, s8 idx) |
be663ab6 WYG |
1083 | { |
1084 | /* "active" values */ | |
e2ebc833 | 1085 | struct il_scale_tbl_info *active_tbl = |
be663ab6 | 1086 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
0c2c8852 SG |
1087 | s32 active_sr = active_tbl->win[idx].success_ratio; |
1088 | s32 active_tpt = active_tbl->expected_tpt[idx]; | |
be663ab6 WYG |
1089 | |
1090 | /* expected "search" throughput */ | |
1091 | s32 *tpt_tbl = tbl->expected_tpt; | |
1092 | ||
1093 | s32 new_rate, high, low, start_hi; | |
1094 | u16 high_low; | |
0c2c8852 | 1095 | s8 rate = idx; |
be663ab6 | 1096 | |
2eb05816 | 1097 | new_rate = high = low = start_hi = RATE_INVALID; |
be663ab6 | 1098 | |
e7392364 SG |
1099 | for (;;) { |
1100 | high_low = | |
1101 | il4965_rs_get_adjacent_rate(il, rate, rate_mask, | |
be663ab6 WYG |
1102 | tbl->lq_type); |
1103 | ||
1104 | low = high_low & 0xff; | |
1105 | high = (high_low >> 8) & 0xff; | |
1106 | ||
1107 | /* | |
1108 | * Lower the "search" bit rate, to give new "search" mode | |
1109 | * approximately the same throughput as "active" if: | |
1110 | * | |
1111 | * 1) "Active" mode has been working modestly well (but not | |
1112 | * great), and expected "search" throughput (under perfect | |
1113 | * conditions) at candidate rate is above the actual | |
1114 | * measured "active" throughput (but less than expected | |
1115 | * "active" throughput under perfect conditions). | |
1116 | * OR | |
1117 | * 2) "Active" mode has been working perfectly or very well | |
1118 | * and expected "search" throughput (under perfect | |
1119 | * conditions) at candidate rate is above expected | |
1120 | * "active" throughput (under perfect conditions). | |
1121 | */ | |
232913b5 | 1122 | if ((100 * tpt_tbl[rate] > lq_sta->last_tpt && |
e7392364 SG |
1123 | (active_sr > RATE_DECREASE_TH && active_sr <= RATE_HIGH_TH |
1124 | && tpt_tbl[rate] <= active_tpt)) || | |
2eb05816 | 1125 | (active_sr >= RATE_SCALE_SWITCH && |
232913b5 | 1126 | tpt_tbl[rate] > active_tpt)) { |
be663ab6 WYG |
1127 | |
1128 | /* (2nd or later pass) | |
1129 | * If we've already tried to raise the rate, and are | |
1130 | * now trying to lower it, use the higher rate. */ | |
2eb05816 | 1131 | if (start_hi != RATE_INVALID) { |
be663ab6 WYG |
1132 | new_rate = start_hi; |
1133 | break; | |
1134 | } | |
1135 | ||
1136 | new_rate = rate; | |
1137 | ||
1138 | /* Loop again with lower rate */ | |
2eb05816 | 1139 | if (low != RATE_INVALID) |
be663ab6 WYG |
1140 | rate = low; |
1141 | ||
1142 | /* Lower rate not available, use the original */ | |
1143 | else | |
1144 | break; | |
1145 | ||
e7392364 | 1146 | /* Else try to raise the "search" rate to match "active" */ |
be663ab6 WYG |
1147 | } else { |
1148 | /* (2nd or later pass) | |
1149 | * If we've already tried to lower the rate, and are | |
1150 | * now trying to raise it, use the lower rate. */ | |
2eb05816 | 1151 | if (new_rate != RATE_INVALID) |
be663ab6 WYG |
1152 | break; |
1153 | ||
1154 | /* Loop again with higher rate */ | |
2eb05816 | 1155 | else if (high != RATE_INVALID) { |
be663ab6 WYG |
1156 | start_hi = high; |
1157 | rate = high; | |
1158 | ||
e7392364 | 1159 | /* Higher rate not available, use the original */ |
be663ab6 WYG |
1160 | } else { |
1161 | new_rate = rate; | |
1162 | break; | |
1163 | } | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | return new_rate; | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Set up search table for MIMO2 | |
1172 | */ | |
e7392364 SG |
1173 | static int |
1174 | il4965_rs_switch_to_mimo2(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1175 | struct ieee80211_conf *conf, | |
1176 | struct ieee80211_sta *sta, | |
1177 | struct il_scale_tbl_info *tbl, int idx) | |
be663ab6 WYG |
1178 | { |
1179 | u16 rate_mask; | |
1180 | s32 rate; | |
1181 | s8 is_green = lq_sta->is_green; | |
be663ab6 WYG |
1182 | |
1183 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1184 | return -1; | |
1185 | ||
e7392364 SG |
1186 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) == |
1187 | WLAN_HT_CAP_SM_PS_STATIC) | |
be663ab6 WYG |
1188 | return -1; |
1189 | ||
1190 | /* Need both Tx chains/antennas to support MIMO */ | |
46bc8d4b | 1191 | if (il->hw_params.tx_chains_num < 2) |
be663ab6 WYG |
1192 | return -1; |
1193 | ||
58de00a4 | 1194 | D_RATE("LQ: try to switch to MIMO2\n"); |
be663ab6 WYG |
1195 | |
1196 | tbl->lq_type = LQ_MIMO2; | |
1197 | tbl->is_dup = lq_sta->is_dup; | |
1198 | tbl->action = 0; | |
e2ebc833 | 1199 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
1200 | rate_mask = lq_sta->active_mimo2_rate; |
1201 | ||
83007196 | 1202 | if (il_is_ht40_tx_allowed(il, &sta->ht_cap)) |
be663ab6 WYG |
1203 | tbl->is_ht40 = 1; |
1204 | else | |
1205 | tbl->is_ht40 = 0; | |
1206 | ||
e2ebc833 | 1207 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
be663ab6 | 1208 | |
0c2c8852 | 1209 | rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx); |
be663ab6 | 1210 | |
e7392364 | 1211 | D_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
2eb05816 | 1212 | if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) { |
e7392364 SG |
1213 | D_RATE("Can't switch with idx %d rate mask %x\n", rate, |
1214 | rate_mask); | |
be663ab6 WYG |
1215 | return -1; |
1216 | } | |
e7392364 SG |
1217 | tbl->current_rate = |
1218 | il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green); | |
be663ab6 | 1219 | |
e7392364 SG |
1220 | D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate, |
1221 | is_green); | |
be663ab6 WYG |
1222 | return 0; |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Set up search table for SISO | |
1227 | */ | |
e7392364 SG |
1228 | static int |
1229 | il4965_rs_switch_to_siso(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1230 | struct ieee80211_conf *conf, struct ieee80211_sta *sta, | |
1231 | struct il_scale_tbl_info *tbl, int idx) | |
be663ab6 WYG |
1232 | { |
1233 | u16 rate_mask; | |
1234 | u8 is_green = lq_sta->is_green; | |
1235 | s32 rate; | |
be663ab6 WYG |
1236 | |
1237 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1238 | return -1; | |
1239 | ||
58de00a4 | 1240 | D_RATE("LQ: try to switch to SISO\n"); |
be663ab6 WYG |
1241 | |
1242 | tbl->is_dup = lq_sta->is_dup; | |
1243 | tbl->lq_type = LQ_SISO; | |
1244 | tbl->action = 0; | |
e2ebc833 | 1245 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
1246 | rate_mask = lq_sta->active_siso_rate; |
1247 | ||
83007196 | 1248 | if (il_is_ht40_tx_allowed(il, &sta->ht_cap)) |
be663ab6 WYG |
1249 | tbl->is_ht40 = 1; |
1250 | else | |
1251 | tbl->is_ht40 = 0; | |
1252 | ||
1253 | if (is_green) | |
e7392364 | 1254 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield */ |
be663ab6 | 1255 | |
e2ebc833 | 1256 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
0c2c8852 | 1257 | rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx); |
be663ab6 | 1258 | |
58de00a4 | 1259 | D_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
2eb05816 | 1260 | if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) { |
e7392364 SG |
1261 | D_RATE("can not switch with idx %d rate mask %x\n", rate, |
1262 | rate_mask); | |
be663ab6 WYG |
1263 | return -1; |
1264 | } | |
e7392364 SG |
1265 | tbl->current_rate = |
1266 | il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green); | |
1267 | D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate, | |
1268 | is_green); | |
be663ab6 WYG |
1269 | return 0; |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * Try to switch to new modulation mode from legacy | |
1274 | */ | |
e7392364 SG |
1275 | static int |
1276 | il4965_rs_move_legacy_other(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1277 | struct ieee80211_conf *conf, | |
1278 | struct ieee80211_sta *sta, int idx) | |
be663ab6 | 1279 | { |
e2ebc833 SG |
1280 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1281 | struct il_scale_tbl_info *search_tbl = | |
e7392364 | 1282 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
0c2c8852 | 1283 | struct il_rate_scale_data *win = &(tbl->win[idx]); |
e7392364 SG |
1284 | u32 sz = |
1285 | (sizeof(struct il_scale_tbl_info) - | |
1286 | (sizeof(struct il_rate_scale_data) * RATE_COUNT)); | |
be663ab6 | 1287 | u8 start_action; |
46bc8d4b SG |
1288 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1289 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1290 | int ret = 0; |
1291 | u8 update_search_tbl_counter = 0; | |
1292 | ||
e2ebc833 | 1293 | tbl->action = IL_LEGACY_SWITCH_SISO; |
be663ab6 WYG |
1294 | |
1295 | start_action = tbl->action; | |
e7392364 | 1296 | for (;;) { |
be663ab6 WYG |
1297 | lq_sta->action_counter++; |
1298 | switch (tbl->action) { | |
e2ebc833 SG |
1299 | case IL_LEGACY_SWITCH_ANTENNA1: |
1300 | case IL_LEGACY_SWITCH_ANTENNA2: | |
58de00a4 | 1301 | D_RATE("LQ: Legacy toggle Antenna\n"); |
be663ab6 | 1302 | |
e2ebc833 | 1303 | if ((tbl->action == IL_LEGACY_SWITCH_ANTENNA1 && |
e7392364 | 1304 | tx_chains_num <= 1) || |
e2ebc833 | 1305 | (tbl->action == IL_LEGACY_SWITCH_ANTENNA2 && |
e7392364 | 1306 | tx_chains_num <= 2)) |
be663ab6 WYG |
1307 | break; |
1308 | ||
1309 | /* Don't change antenna if success has been great */ | |
6ce1dc45 | 1310 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1311 | break; |
1312 | ||
1313 | /* Set up search table to try other antenna */ | |
1314 | memcpy(search_tbl, tbl, sz); | |
1315 | ||
e7392364 SG |
1316 | if (il4965_rs_toggle_antenna |
1317 | (valid_tx_ant, &search_tbl->current_rate, | |
1318 | search_tbl)) { | |
be663ab6 | 1319 | update_search_tbl_counter = 1; |
e2ebc833 | 1320 | il4965_rs_set_expected_tpt_table(lq_sta, |
e7392364 | 1321 | search_tbl); |
be663ab6 WYG |
1322 | goto out; |
1323 | } | |
1324 | break; | |
e2ebc833 | 1325 | case IL_LEGACY_SWITCH_SISO: |
58de00a4 | 1326 | D_RATE("LQ: Legacy switch to SISO\n"); |
be663ab6 WYG |
1327 | |
1328 | /* Set up search table to try SISO */ | |
1329 | memcpy(search_tbl, tbl, sz); | |
1330 | search_tbl->is_SGI = 0; | |
e7392364 SG |
1331 | ret = |
1332 | il4965_rs_switch_to_siso(il, lq_sta, conf, sta, | |
1333 | search_tbl, idx); | |
be663ab6 WYG |
1334 | if (!ret) { |
1335 | lq_sta->action_counter = 0; | |
1336 | goto out; | |
1337 | } | |
1338 | ||
1339 | break; | |
e2ebc833 SG |
1340 | case IL_LEGACY_SWITCH_MIMO2_AB: |
1341 | case IL_LEGACY_SWITCH_MIMO2_AC: | |
1342 | case IL_LEGACY_SWITCH_MIMO2_BC: | |
58de00a4 | 1343 | D_RATE("LQ: Legacy switch to MIMO2\n"); |
be663ab6 WYG |
1344 | |
1345 | /* Set up search table to try MIMO */ | |
1346 | memcpy(search_tbl, tbl, sz); | |
1347 | search_tbl->is_SGI = 0; | |
1348 | ||
e2ebc833 | 1349 | if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AB) |
be663ab6 | 1350 | search_tbl->ant_type = ANT_AB; |
e2ebc833 | 1351 | else if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AC) |
be663ab6 WYG |
1352 | search_tbl->ant_type = ANT_AC; |
1353 | else | |
1354 | search_tbl->ant_type = ANT_BC; | |
1355 | ||
e7392364 SG |
1356 | if (!il4965_rs_is_valid_ant |
1357 | (valid_tx_ant, search_tbl->ant_type)) | |
be663ab6 WYG |
1358 | break; |
1359 | ||
e7392364 SG |
1360 | ret = |
1361 | il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta, | |
1362 | search_tbl, idx); | |
be663ab6 WYG |
1363 | if (!ret) { |
1364 | lq_sta->action_counter = 0; | |
1365 | goto out; | |
1366 | } | |
1367 | break; | |
1368 | } | |
1369 | tbl->action++; | |
e2ebc833 SG |
1370 | if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
1371 | tbl->action = IL_LEGACY_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1372 | |
1373 | if (tbl->action == start_action) | |
1374 | break; | |
1375 | ||
1376 | } | |
1377 | search_tbl->lq_type = LQ_NONE; | |
1378 | return 0; | |
1379 | ||
1380 | out: | |
1381 | lq_sta->search_better_tbl = 1; | |
1382 | tbl->action++; | |
e2ebc833 SG |
1383 | if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
1384 | tbl->action = IL_LEGACY_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1385 | if (update_search_tbl_counter) |
1386 | search_tbl->action = tbl->action; | |
1387 | return 0; | |
1388 | ||
1389 | } | |
1390 | ||
1391 | /* | |
1392 | * Try to switch to new modulation mode from SISO | |
1393 | */ | |
e7392364 SG |
1394 | static int |
1395 | il4965_rs_move_siso_to_other(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1396 | struct ieee80211_conf *conf, | |
1397 | struct ieee80211_sta *sta, int idx) | |
be663ab6 WYG |
1398 | { |
1399 | u8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1400 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1401 | struct il_scale_tbl_info *search_tbl = | |
e7392364 | 1402 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
0c2c8852 | 1403 | struct il_rate_scale_data *win = &(tbl->win[idx]); |
be663ab6 | 1404 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e7392364 SG |
1405 | u32 sz = |
1406 | (sizeof(struct il_scale_tbl_info) - | |
1407 | (sizeof(struct il_rate_scale_data) * RATE_COUNT)); | |
be663ab6 | 1408 | u8 start_action; |
46bc8d4b SG |
1409 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1410 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1411 | u8 update_search_tbl_counter = 0; |
1412 | int ret; | |
1413 | ||
1414 | start_action = tbl->action; | |
1415 | ||
1416 | for (;;) { | |
1417 | lq_sta->action_counter++; | |
1418 | switch (tbl->action) { | |
e2ebc833 SG |
1419 | case IL_SISO_SWITCH_ANTENNA1: |
1420 | case IL_SISO_SWITCH_ANTENNA2: | |
58de00a4 | 1421 | D_RATE("LQ: SISO toggle Antenna\n"); |
e2ebc833 | 1422 | if ((tbl->action == IL_SISO_SWITCH_ANTENNA1 && |
e7392364 | 1423 | tx_chains_num <= 1) || |
e2ebc833 | 1424 | (tbl->action == IL_SISO_SWITCH_ANTENNA2 && |
e7392364 | 1425 | tx_chains_num <= 2)) |
be663ab6 WYG |
1426 | break; |
1427 | ||
6ce1dc45 | 1428 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1429 | break; |
1430 | ||
1431 | memcpy(search_tbl, tbl, sz); | |
e7392364 SG |
1432 | if (il4965_rs_toggle_antenna |
1433 | (valid_tx_ant, &search_tbl->current_rate, | |
1434 | search_tbl)) { | |
be663ab6 WYG |
1435 | update_search_tbl_counter = 1; |
1436 | goto out; | |
1437 | } | |
1438 | break; | |
e2ebc833 SG |
1439 | case IL_SISO_SWITCH_MIMO2_AB: |
1440 | case IL_SISO_SWITCH_MIMO2_AC: | |
1441 | case IL_SISO_SWITCH_MIMO2_BC: | |
58de00a4 | 1442 | D_RATE("LQ: SISO switch to MIMO2\n"); |
be663ab6 WYG |
1443 | memcpy(search_tbl, tbl, sz); |
1444 | search_tbl->is_SGI = 0; | |
1445 | ||
e2ebc833 | 1446 | if (tbl->action == IL_SISO_SWITCH_MIMO2_AB) |
be663ab6 | 1447 | search_tbl->ant_type = ANT_AB; |
e2ebc833 | 1448 | else if (tbl->action == IL_SISO_SWITCH_MIMO2_AC) |
be663ab6 WYG |
1449 | search_tbl->ant_type = ANT_AC; |
1450 | else | |
1451 | search_tbl->ant_type = ANT_BC; | |
1452 | ||
e7392364 SG |
1453 | if (!il4965_rs_is_valid_ant |
1454 | (valid_tx_ant, search_tbl->ant_type)) | |
be663ab6 WYG |
1455 | break; |
1456 | ||
e7392364 SG |
1457 | ret = |
1458 | il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta, | |
1459 | search_tbl, idx); | |
be663ab6 WYG |
1460 | if (!ret) |
1461 | goto out; | |
1462 | break; | |
e2ebc833 | 1463 | case IL_SISO_SWITCH_GI: |
e7392364 SG |
1464 | if (!tbl->is_ht40 && |
1465 | !(ht_cap->cap & IEEE80211_HT_CAP_SGI_20)) | |
be663ab6 | 1466 | break; |
e7392364 SG |
1467 | if (tbl->is_ht40 && |
1468 | !(ht_cap->cap & IEEE80211_HT_CAP_SGI_40)) | |
be663ab6 WYG |
1469 | break; |
1470 | ||
58de00a4 | 1471 | D_RATE("LQ: SISO toggle SGI/NGI\n"); |
be663ab6 WYG |
1472 | |
1473 | memcpy(search_tbl, tbl, sz); | |
1474 | if (is_green) { | |
1475 | if (!tbl->is_SGI) | |
1476 | break; | |
1477 | else | |
e7392364 | 1478 | IL_ERR("SGI was set in GF+SISO\n"); |
be663ab6 WYG |
1479 | } |
1480 | search_tbl->is_SGI = !tbl->is_SGI; | |
e2ebc833 | 1481 | il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
be663ab6 WYG |
1482 | if (tbl->is_SGI) { |
1483 | s32 tpt = lq_sta->last_tpt / 100; | |
0c2c8852 | 1484 | if (tpt >= search_tbl->expected_tpt[idx]) |
be663ab6 WYG |
1485 | break; |
1486 | } | |
1487 | search_tbl->current_rate = | |
e7392364 SG |
1488 | il4965_rate_n_flags_from_tbl(il, search_tbl, idx, |
1489 | is_green); | |
be663ab6 WYG |
1490 | update_search_tbl_counter = 1; |
1491 | goto out; | |
1492 | } | |
1493 | tbl->action++; | |
e2ebc833 SG |
1494 | if (tbl->action > IL_SISO_SWITCH_GI) |
1495 | tbl->action = IL_SISO_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1496 | |
1497 | if (tbl->action == start_action) | |
1498 | break; | |
1499 | } | |
1500 | search_tbl->lq_type = LQ_NONE; | |
1501 | return 0; | |
1502 | ||
e7392364 | 1503 | out: |
be663ab6 WYG |
1504 | lq_sta->search_better_tbl = 1; |
1505 | tbl->action++; | |
e2ebc833 SG |
1506 | if (tbl->action > IL_SISO_SWITCH_GI) |
1507 | tbl->action = IL_SISO_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1508 | if (update_search_tbl_counter) |
1509 | search_tbl->action = tbl->action; | |
1510 | ||
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * Try to switch to new modulation mode from MIMO2 | |
1516 | */ | |
e7392364 SG |
1517 | static int |
1518 | il4965_rs_move_mimo2_to_other(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1519 | struct ieee80211_conf *conf, | |
1520 | struct ieee80211_sta *sta, int idx) | |
be663ab6 WYG |
1521 | { |
1522 | s8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1523 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1524 | struct il_scale_tbl_info *search_tbl = | |
e7392364 | 1525 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
0c2c8852 | 1526 | struct il_rate_scale_data *win = &(tbl->win[idx]); |
be663ab6 | 1527 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e7392364 SG |
1528 | u32 sz = |
1529 | (sizeof(struct il_scale_tbl_info) - | |
1530 | (sizeof(struct il_rate_scale_data) * RATE_COUNT)); | |
be663ab6 | 1531 | u8 start_action; |
46bc8d4b SG |
1532 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1533 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1534 | u8 update_search_tbl_counter = 0; |
1535 | int ret; | |
1536 | ||
1537 | start_action = tbl->action; | |
1538 | for (;;) { | |
1539 | lq_sta->action_counter++; | |
1540 | switch (tbl->action) { | |
e2ebc833 SG |
1541 | case IL_MIMO2_SWITCH_ANTENNA1: |
1542 | case IL_MIMO2_SWITCH_ANTENNA2: | |
58de00a4 | 1543 | D_RATE("LQ: MIMO2 toggle Antennas\n"); |
be663ab6 WYG |
1544 | |
1545 | if (tx_chains_num <= 2) | |
1546 | break; | |
1547 | ||
6ce1dc45 | 1548 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1549 | break; |
1550 | ||
1551 | memcpy(search_tbl, tbl, sz); | |
e7392364 SG |
1552 | if (il4965_rs_toggle_antenna |
1553 | (valid_tx_ant, &search_tbl->current_rate, | |
1554 | search_tbl)) { | |
be663ab6 WYG |
1555 | update_search_tbl_counter = 1; |
1556 | goto out; | |
1557 | } | |
1558 | break; | |
e2ebc833 SG |
1559 | case IL_MIMO2_SWITCH_SISO_A: |
1560 | case IL_MIMO2_SWITCH_SISO_B: | |
1561 | case IL_MIMO2_SWITCH_SISO_C: | |
58de00a4 | 1562 | D_RATE("LQ: MIMO2 switch to SISO\n"); |
be663ab6 WYG |
1563 | |
1564 | /* Set up new search table for SISO */ | |
1565 | memcpy(search_tbl, tbl, sz); | |
1566 | ||
e2ebc833 | 1567 | if (tbl->action == IL_MIMO2_SWITCH_SISO_A) |
be663ab6 | 1568 | search_tbl->ant_type = ANT_A; |
e2ebc833 | 1569 | else if (tbl->action == IL_MIMO2_SWITCH_SISO_B) |
be663ab6 WYG |
1570 | search_tbl->ant_type = ANT_B; |
1571 | else | |
1572 | search_tbl->ant_type = ANT_C; | |
1573 | ||
e7392364 SG |
1574 | if (!il4965_rs_is_valid_ant |
1575 | (valid_tx_ant, search_tbl->ant_type)) | |
be663ab6 WYG |
1576 | break; |
1577 | ||
e7392364 SG |
1578 | ret = |
1579 | il4965_rs_switch_to_siso(il, lq_sta, conf, sta, | |
1580 | search_tbl, idx); | |
be663ab6 WYG |
1581 | if (!ret) |
1582 | goto out; | |
1583 | ||
1584 | break; | |
1585 | ||
e2ebc833 | 1586 | case IL_MIMO2_SWITCH_GI: |
e7392364 SG |
1587 | if (!tbl->is_ht40 && |
1588 | !(ht_cap->cap & IEEE80211_HT_CAP_SGI_20)) | |
be663ab6 | 1589 | break; |
e7392364 SG |
1590 | if (tbl->is_ht40 && |
1591 | !(ht_cap->cap & IEEE80211_HT_CAP_SGI_40)) | |
be663ab6 WYG |
1592 | break; |
1593 | ||
58de00a4 | 1594 | D_RATE("LQ: MIMO2 toggle SGI/NGI\n"); |
be663ab6 WYG |
1595 | |
1596 | /* Set up new search table for MIMO2 */ | |
1597 | memcpy(search_tbl, tbl, sz); | |
1598 | search_tbl->is_SGI = !tbl->is_SGI; | |
e2ebc833 | 1599 | il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
be663ab6 WYG |
1600 | /* |
1601 | * If active table already uses the fastest possible | |
1602 | * modulation (dual stream with short guard interval), | |
1603 | * and it's working well, there's no need to look | |
1604 | * for a better type of modulation! | |
1605 | */ | |
1606 | if (tbl->is_SGI) { | |
1607 | s32 tpt = lq_sta->last_tpt / 100; | |
0c2c8852 | 1608 | if (tpt >= search_tbl->expected_tpt[idx]) |
be663ab6 WYG |
1609 | break; |
1610 | } | |
1611 | search_tbl->current_rate = | |
e7392364 SG |
1612 | il4965_rate_n_flags_from_tbl(il, search_tbl, idx, |
1613 | is_green); | |
be663ab6 WYG |
1614 | update_search_tbl_counter = 1; |
1615 | goto out; | |
1616 | ||
1617 | } | |
1618 | tbl->action++; | |
e2ebc833 SG |
1619 | if (tbl->action > IL_MIMO2_SWITCH_GI) |
1620 | tbl->action = IL_MIMO2_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1621 | |
1622 | if (tbl->action == start_action) | |
1623 | break; | |
1624 | } | |
1625 | search_tbl->lq_type = LQ_NONE; | |
1626 | return 0; | |
e7392364 | 1627 | out: |
be663ab6 WYG |
1628 | lq_sta->search_better_tbl = 1; |
1629 | tbl->action++; | |
e2ebc833 SG |
1630 | if (tbl->action > IL_MIMO2_SWITCH_GI) |
1631 | tbl->action = IL_MIMO2_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1632 | if (update_search_tbl_counter) |
1633 | search_tbl->action = tbl->action; | |
1634 | ||
1635 | return 0; | |
1636 | ||
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * Check whether we should continue using same modulation mode, or | |
1641 | * begin search for a new mode, based on: | |
1642 | * 1) # tx successes or failures while using this mode | |
1643 | * 2) # times calling this function | |
1644 | * 3) elapsed time in this mode (not used, for now) | |
1645 | */ | |
1646 | static void | |
e2ebc833 | 1647 | il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, bool force_search) |
be663ab6 | 1648 | { |
e2ebc833 | 1649 | struct il_scale_tbl_info *tbl; |
be663ab6 WYG |
1650 | int i; |
1651 | int active_tbl; | |
1652 | int flush_interval_passed = 0; | |
46bc8d4b | 1653 | struct il_priv *il; |
be663ab6 | 1654 | |
46bc8d4b | 1655 | il = lq_sta->drv; |
be663ab6 WYG |
1656 | active_tbl = lq_sta->active_tbl; |
1657 | ||
1658 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1659 | ||
1660 | /* If we've been disallowing search, see if we should now allow it */ | |
1661 | if (lq_sta->stay_in_tbl) { | |
1662 | ||
1663 | /* Elapsed time using current modulation mode */ | |
1664 | if (lq_sta->flush_timer) | |
1665 | flush_interval_passed = | |
e7392364 SG |
1666 | time_after(jiffies, |
1667 | (unsigned long)(lq_sta->flush_timer + | |
1668 | RATE_SCALE_FLUSH_INTVL)); | |
be663ab6 WYG |
1669 | |
1670 | /* | |
1671 | * Check if we should allow search for new modulation mode. | |
1672 | * If many frames have failed or succeeded, or we've used | |
1673 | * this same modulation for a long time, allow search, and | |
1674 | * reset history stats that keep track of whether we should | |
1675 | * allow a new search. Also (below) reset all bitmaps and | |
1676 | * stats in active history. | |
1677 | */ | |
1678 | if (force_search || | |
232913b5 SG |
1679 | lq_sta->total_failed > lq_sta->max_failure_limit || |
1680 | lq_sta->total_success > lq_sta->max_success_limit || | |
1681 | (!lq_sta->search_better_tbl && lq_sta->flush_timer && | |
1682 | flush_interval_passed)) { | |
58de00a4 | 1683 | D_RATE("LQ: stay is expired %d %d %d\n:", |
e7392364 SG |
1684 | lq_sta->total_failed, lq_sta->total_success, |
1685 | flush_interval_passed); | |
be663ab6 WYG |
1686 | |
1687 | /* Allow search for new mode */ | |
1688 | lq_sta->stay_in_tbl = 0; /* only place reset */ | |
1689 | lq_sta->total_failed = 0; | |
1690 | lq_sta->total_success = 0; | |
1691 | lq_sta->flush_timer = 0; | |
1692 | ||
e7392364 SG |
1693 | /* |
1694 | * Else if we've used this modulation mode enough repetitions | |
1695 | * (regardless of elapsed time or success/failure), reset | |
1696 | * history bitmaps and rate-specific stats for all rates in | |
1697 | * active table. | |
1698 | */ | |
be663ab6 WYG |
1699 | } else { |
1700 | lq_sta->table_count++; | |
e7392364 | 1701 | if (lq_sta->table_count >= lq_sta->table_count_limit) { |
be663ab6 WYG |
1702 | lq_sta->table_count = 0; |
1703 | ||
e7392364 | 1704 | D_RATE("LQ: stay in table clear win\n"); |
2eb05816 | 1705 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 SG |
1706 | il4965_rs_rate_scale_clear_win(& |
1707 | (tbl-> | |
1708 | win | |
1709 | [i])); | |
be663ab6 WYG |
1710 | } |
1711 | } | |
1712 | ||
1713 | /* If transitioning to allow "search", reset all history | |
1714 | * bitmaps and stats in active table (this will become the new | |
1715 | * "search" table). */ | |
1716 | if (!lq_sta->stay_in_tbl) { | |
2eb05816 | 1717 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 | 1718 | il4965_rs_rate_scale_clear_win(&(tbl->win[i])); |
be663ab6 WYG |
1719 | } |
1720 | } | |
1721 | } | |
1722 | ||
1723 | /* | |
1724 | * setup rate table in uCode | |
be663ab6 | 1725 | */ |
a741b995 | 1726 | static void |
83007196 | 1727 | il4965_rs_update_rate_tbl(struct il_priv *il, struct il_lq_sta *lq_sta, |
e7392364 | 1728 | struct il_scale_tbl_info *tbl, int idx, u8 is_green) |
be663ab6 WYG |
1729 | { |
1730 | u32 rate; | |
1731 | ||
1732 | /* Update uCode's rate table. */ | |
0c2c8852 | 1733 | rate = il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green); |
46bc8d4b | 1734 | il4965_rs_fill_link_cmd(il, lq_sta, rate); |
83007196 | 1735 | il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false); |
be663ab6 WYG |
1736 | } |
1737 | ||
1738 | /* | |
1739 | * Do rate scaling and search for new modulation mode. | |
1740 | */ | |
e7392364 SG |
1741 | static void |
1742 | il4965_rs_rate_scale_perform(struct il_priv *il, struct sk_buff *skb, | |
1743 | struct ieee80211_sta *sta, | |
1744 | struct il_lq_sta *lq_sta) | |
be663ab6 | 1745 | { |
46bc8d4b | 1746 | struct ieee80211_hw *hw = il->hw; |
be663ab6 WYG |
1747 | struct ieee80211_conf *conf = &hw->conf; |
1748 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1749 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
2eb05816 SG |
1750 | int low = RATE_INVALID; |
1751 | int high = RATE_INVALID; | |
0c2c8852 | 1752 | int idx; |
be663ab6 | 1753 | int i; |
6ce1dc45 | 1754 | struct il_rate_scale_data *win = NULL; |
e2ebc833 SG |
1755 | int current_tpt = IL_INVALID_VALUE; |
1756 | int low_tpt = IL_INVALID_VALUE; | |
1757 | int high_tpt = IL_INVALID_VALUE; | |
be663ab6 WYG |
1758 | u32 fail_count; |
1759 | s8 scale_action = 0; | |
1760 | u16 rate_mask; | |
1761 | u8 update_lq = 0; | |
e2ebc833 | 1762 | struct il_scale_tbl_info *tbl, *tbl1; |
0c2c8852 | 1763 | u16 rate_scale_idx_msk = 0; |
be663ab6 WYG |
1764 | u8 is_green = 0; |
1765 | u8 active_tbl = 0; | |
1766 | u8 done_search = 0; | |
1767 | u16 high_low; | |
1768 | s32 sr; | |
1769 | u8 tid = MAX_TID_COUNT; | |
e2ebc833 | 1770 | struct il_tid_data *tid_data; |
be663ab6 | 1771 | |
58de00a4 | 1772 | D_RATE("rate scale calculate new rate for skb\n"); |
be663ab6 WYG |
1773 | |
1774 | /* Send management frames and NO_ACK data using lowest rate. */ | |
1775 | /* TODO: this could probably be improved.. */ | |
1776 | if (!ieee80211_is_data(hdr->frame_control) || | |
232913b5 | 1777 | (info->flags & IEEE80211_TX_CTL_NO_ACK)) |
be663ab6 WYG |
1778 | return; |
1779 | ||
be663ab6 WYG |
1780 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
1781 | ||
e2ebc833 | 1782 | tid = il4965_rs_tl_add_packet(lq_sta, hdr); |
232913b5 | 1783 | if (tid != MAX_TID_COUNT && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
46bc8d4b | 1784 | tid_data = &il->stations[lq_sta->lq.sta_id].tid[tid]; |
e2ebc833 | 1785 | if (tid_data->agg.state == IL_AGG_OFF) |
be663ab6 WYG |
1786 | lq_sta->is_agg = 0; |
1787 | else | |
1788 | lq_sta->is_agg = 1; | |
1789 | } else | |
1790 | lq_sta->is_agg = 0; | |
1791 | ||
1792 | /* | |
1793 | * Select rate-scale / modulation-mode table to work with in | |
1794 | * the rest of this function: "search" if searching for better | |
1795 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1796 | */ | |
1797 | if (!lq_sta->search_better_tbl) | |
1798 | active_tbl = lq_sta->active_tbl; | |
1799 | else | |
1800 | active_tbl = 1 - lq_sta->active_tbl; | |
1801 | ||
1802 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1803 | if (is_legacy(tbl->lq_type)) | |
1804 | lq_sta->is_green = 0; | |
1805 | else | |
1c03c462 | 1806 | lq_sta->is_green = il4965_rs_use_green(il, sta); |
be663ab6 WYG |
1807 | is_green = lq_sta->is_green; |
1808 | ||
1809 | /* current tx rate */ | |
0c2c8852 | 1810 | idx = lq_sta->last_txrate_idx; |
be663ab6 | 1811 | |
e7392364 | 1812 | D_RATE("Rate scale idx %d for type %d\n", idx, tbl->lq_type); |
be663ab6 WYG |
1813 | |
1814 | /* rates available for this association, and for modulation mode */ | |
e2ebc833 | 1815 | rate_mask = il4965_rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
be663ab6 | 1816 | |
58de00a4 | 1817 | D_RATE("mask 0x%04X\n", rate_mask); |
be663ab6 WYG |
1818 | |
1819 | /* mask with station rate restriction */ | |
1820 | if (is_legacy(tbl->lq_type)) { | |
1821 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1822 | /* supp_rates has no CCK bits in A mode */ | |
e7392364 SG |
1823 | rate_scale_idx_msk = |
1824 | (u16) (rate_mask & | |
1825 | (lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); | |
be663ab6 | 1826 | else |
e7392364 SG |
1827 | rate_scale_idx_msk = |
1828 | (u16) (rate_mask & lq_sta->supp_rates); | |
be663ab6 WYG |
1829 | |
1830 | } else | |
0c2c8852 | 1831 | rate_scale_idx_msk = rate_mask; |
be663ab6 | 1832 | |
0c2c8852 SG |
1833 | if (!rate_scale_idx_msk) |
1834 | rate_scale_idx_msk = rate_mask; | |
be663ab6 | 1835 | |
0c2c8852 | 1836 | if (!((1 << idx) & rate_scale_idx_msk)) { |
9406f797 | 1837 | IL_ERR("Current Rate is not valid\n"); |
be663ab6 | 1838 | if (lq_sta->search_better_tbl) { |
e7392364 | 1839 | /* revert to active table if search table is not valid */ |
be663ab6 WYG |
1840 | tbl->lq_type = LQ_NONE; |
1841 | lq_sta->search_better_tbl = 0; | |
1842 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1843 | /* get "active" rate info */ | |
0c2c8852 | 1844 | idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
83007196 | 1845 | il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx, |
e7392364 | 1846 | is_green); |
be663ab6 WYG |
1847 | } |
1848 | return; | |
1849 | } | |
1850 | ||
6ce1dc45 | 1851 | /* Get expected throughput table and history win for current rate */ |
be663ab6 | 1852 | if (!tbl->expected_tpt) { |
9406f797 | 1853 | IL_ERR("tbl->expected_tpt is NULL\n"); |
be663ab6 WYG |
1854 | return; |
1855 | } | |
1856 | ||
1857 | /* force user max rate if set by user */ | |
e7392364 | 1858 | if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < idx) { |
0c2c8852 | 1859 | idx = lq_sta->max_rate_idx; |
be663ab6 | 1860 | update_lq = 1; |
0c2c8852 | 1861 | win = &(tbl->win[idx]); |
be663ab6 WYG |
1862 | goto lq_update; |
1863 | } | |
1864 | ||
0c2c8852 | 1865 | win = &(tbl->win[idx]); |
be663ab6 WYG |
1866 | |
1867 | /* | |
1868 | * If there is not enough history to calculate actual average | |
1869 | * throughput, keep analyzing results of more tx frames, without | |
1870 | * changing rate or mode (bypass most of the rest of this function). | |
1871 | * Set up new rate table in uCode only if old rate is not supported | |
1872 | * in current association (use new rate found above). | |
1873 | */ | |
6ce1dc45 | 1874 | fail_count = win->counter - win->success_counter; |
2eb05816 SG |
1875 | if (fail_count < RATE_MIN_FAILURE_TH && |
1876 | win->success_counter < RATE_MIN_SUCCESS_TH) { | |
e7392364 SG |
1877 | D_RATE("LQ: still below TH. succ=%d total=%d " "for idx %d\n", |
1878 | win->success_counter, win->counter, idx); | |
be663ab6 WYG |
1879 | |
1880 | /* Can't calculate this yet; not enough history */ | |
6ce1dc45 | 1881 | win->average_tpt = IL_INVALID_VALUE; |
be663ab6 WYG |
1882 | |
1883 | /* Should we stay with this modulation mode, | |
1884 | * or search for a new one? */ | |
e2ebc833 | 1885 | il4965_rs_stay_in_table(lq_sta, false); |
be663ab6 WYG |
1886 | |
1887 | goto out; | |
1888 | } | |
1889 | /* Else we have enough samples; calculate estimate of | |
1890 | * actual average throughput */ | |
e7392364 SG |
1891 | if (win->average_tpt != |
1892 | ((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128)) { | |
1893 | IL_ERR("expected_tpt should have been calculated by now\n"); | |
1894 | win->average_tpt = | |
1895 | ((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128); | |
be663ab6 WYG |
1896 | } |
1897 | ||
1898 | /* If we are searching for better modulation mode, check success. */ | |
1899 | if (lq_sta->search_better_tbl) { | |
1900 | /* If good success, continue using the "search" mode; | |
1901 | * no need to send new link quality command, since we're | |
1902 | * continuing to use the setup that we've been trying. */ | |
6ce1dc45 | 1903 | if (win->average_tpt > lq_sta->last_tpt) { |
be663ab6 | 1904 | |
3b98c7f4 | 1905 | D_RATE("LQ: SWITCHING TO NEW TBL " |
e7392364 SG |
1906 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1907 | win->success_ratio, win->average_tpt, | |
1908 | lq_sta->last_tpt); | |
be663ab6 WYG |
1909 | |
1910 | if (!is_legacy(tbl->lq_type)) | |
1911 | lq_sta->enable_counter = 1; | |
1912 | ||
1913 | /* Swap tables; "search" becomes "active" */ | |
1914 | lq_sta->active_tbl = active_tbl; | |
6ce1dc45 | 1915 | current_tpt = win->average_tpt; |
be663ab6 | 1916 | |
e7392364 | 1917 | /* Else poor success; go back to mode in "active" table */ |
be663ab6 WYG |
1918 | } else { |
1919 | ||
3b98c7f4 | 1920 | D_RATE("LQ: GOING BACK TO THE OLD TBL " |
e7392364 SG |
1921 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1922 | win->success_ratio, win->average_tpt, | |
1923 | lq_sta->last_tpt); | |
be663ab6 WYG |
1924 | |
1925 | /* Nullify "search" table */ | |
1926 | tbl->lq_type = LQ_NONE; | |
1927 | ||
1928 | /* Revert to "active" table */ | |
1929 | active_tbl = lq_sta->active_tbl; | |
1930 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1931 | ||
1932 | /* Revert to "active" rate and throughput info */ | |
0c2c8852 | 1933 | idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
be663ab6 WYG |
1934 | current_tpt = lq_sta->last_tpt; |
1935 | ||
1936 | /* Need to set up a new rate table in uCode */ | |
1937 | update_lq = 1; | |
1938 | } | |
1939 | ||
1940 | /* Either way, we've made a decision; modulation mode | |
1941 | * search is done, allow rate adjustment next time. */ | |
1942 | lq_sta->search_better_tbl = 0; | |
1943 | done_search = 1; /* Don't switch modes below! */ | |
1944 | goto lq_update; | |
1945 | } | |
1946 | ||
1947 | /* (Else) not in search of better modulation mode, try for better | |
1948 | * starting rate, while staying in this mode. */ | |
e7392364 SG |
1949 | high_low = |
1950 | il4965_rs_get_adjacent_rate(il, idx, rate_scale_idx_msk, | |
be663ab6 WYG |
1951 | tbl->lq_type); |
1952 | low = high_low & 0xff; | |
1953 | high = (high_low >> 8) & 0xff; | |
1954 | ||
1955 | /* If user set max rate, dont allow higher than user constrain */ | |
e7392364 | 1956 | if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < high) |
2eb05816 | 1957 | high = RATE_INVALID; |
be663ab6 | 1958 | |
6ce1dc45 | 1959 | sr = win->success_ratio; |
be663ab6 WYG |
1960 | |
1961 | /* Collect measured throughputs for current and adjacent rates */ | |
6ce1dc45 | 1962 | current_tpt = win->average_tpt; |
2eb05816 | 1963 | if (low != RATE_INVALID) |
be663ab6 | 1964 | low_tpt = tbl->win[low].average_tpt; |
2eb05816 | 1965 | if (high != RATE_INVALID) |
be663ab6 WYG |
1966 | high_tpt = tbl->win[high].average_tpt; |
1967 | ||
1968 | scale_action = 0; | |
1969 | ||
1970 | /* Too many failures, decrease rate */ | |
2eb05816 | 1971 | if (sr <= RATE_DECREASE_TH || current_tpt == 0) { |
e7392364 | 1972 | D_RATE("decrease rate because of low success_ratio\n"); |
be663ab6 WYG |
1973 | scale_action = -1; |
1974 | ||
e7392364 SG |
1975 | /* No throughput measured yet for adjacent rates; try increase. */ |
1976 | } else if (low_tpt == IL_INVALID_VALUE && high_tpt == IL_INVALID_VALUE) { | |
be663ab6 | 1977 | |
2eb05816 | 1978 | if (high != RATE_INVALID && sr >= RATE_INCREASE_TH) |
be663ab6 | 1979 | scale_action = 1; |
2eb05816 | 1980 | else if (low != RATE_INVALID) |
be663ab6 WYG |
1981 | scale_action = 0; |
1982 | } | |
1983 | ||
1984 | /* Both adjacent throughputs are measured, but neither one has better | |
1985 | * throughput; we're using the best rate, don't change it! */ | |
232913b5 SG |
1986 | else if (low_tpt != IL_INVALID_VALUE && high_tpt != IL_INVALID_VALUE && |
1987 | low_tpt < current_tpt && high_tpt < current_tpt) | |
be663ab6 WYG |
1988 | scale_action = 0; |
1989 | ||
1990 | /* At least one adjacent rate's throughput is measured, | |
1991 | * and may have better performance. */ | |
1992 | else { | |
1993 | /* Higher adjacent rate's throughput is measured */ | |
e2ebc833 | 1994 | if (high_tpt != IL_INVALID_VALUE) { |
be663ab6 | 1995 | /* Higher rate has better throughput */ |
1722f8e1 | 1996 | if (high_tpt > current_tpt && sr >= RATE_INCREASE_TH) |
be663ab6 | 1997 | scale_action = 1; |
1722f8e1 | 1998 | else |
be663ab6 | 1999 | scale_action = 0; |
be663ab6 | 2000 | |
e7392364 | 2001 | /* Lower adjacent rate's throughput is measured */ |
e2ebc833 | 2002 | } else if (low_tpt != IL_INVALID_VALUE) { |
be663ab6 WYG |
2003 | /* Lower rate has better throughput */ |
2004 | if (low_tpt > current_tpt) { | |
e7392364 | 2005 | D_RATE("decrease rate because of low tpt\n"); |
be663ab6 | 2006 | scale_action = -1; |
2eb05816 | 2007 | } else if (sr >= RATE_INCREASE_TH) { |
be663ab6 WYG |
2008 | scale_action = 1; |
2009 | } | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | /* Sanity check; asked for decrease, but success rate or throughput | |
2014 | * has been good at old rate. Don't change it. */ | |
2eb05816 SG |
2015 | if (scale_action == -1 && low != RATE_INVALID && |
2016 | (sr > RATE_HIGH_TH || current_tpt > 100 * tbl->expected_tpt[low])) | |
be663ab6 WYG |
2017 | scale_action = 0; |
2018 | ||
2019 | switch (scale_action) { | |
2020 | case -1: | |
2021 | /* Decrease starting rate, update uCode's rate table */ | |
2eb05816 | 2022 | if (low != RATE_INVALID) { |
be663ab6 | 2023 | update_lq = 1; |
0c2c8852 | 2024 | idx = low; |
be663ab6 WYG |
2025 | } |
2026 | ||
2027 | break; | |
2028 | case 1: | |
2029 | /* Increase starting rate, update uCode's rate table */ | |
2eb05816 | 2030 | if (high != RATE_INVALID) { |
be663ab6 | 2031 | update_lq = 1; |
0c2c8852 | 2032 | idx = high; |
be663ab6 WYG |
2033 | } |
2034 | ||
2035 | break; | |
2036 | case 0: | |
2037 | /* No change */ | |
2038 | default: | |
2039 | break; | |
2040 | } | |
2041 | ||
e7392364 SG |
2042 | D_RATE("choose rate scale idx %d action %d low %d " "high %d type %d\n", |
2043 | idx, scale_action, low, high, tbl->lq_type); | |
be663ab6 WYG |
2044 | |
2045 | lq_update: | |
2046 | /* Replace uCode's rate table for the destination station. */ | |
2047 | if (update_lq) | |
83007196 | 2048 | il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx, is_green); |
be663ab6 WYG |
2049 | |
2050 | /* Should we stay with this modulation mode, | |
2051 | * or search for a new one? */ | |
e7392364 | 2052 | il4965_rs_stay_in_table(lq_sta, false); |
be663ab6 WYG |
2053 | |
2054 | /* | |
2055 | * Search for new modulation mode if we're: | |
2056 | * 1) Not changing rates right now | |
2057 | * 2) Not just finishing up a search | |
2058 | * 3) Allowing a new search | |
2059 | */ | |
e7392364 SG |
2060 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && win->counter) { |
2061 | /* Save current throughput to compare with "search" throughput */ | |
be663ab6 WYG |
2062 | lq_sta->last_tpt = current_tpt; |
2063 | ||
2064 | /* Select a new "search" modulation mode to try. | |
2065 | * If one is found, set up the new "search" table. */ | |
2066 | if (is_legacy(tbl->lq_type)) | |
e7392364 | 2067 | il4965_rs_move_legacy_other(il, lq_sta, conf, sta, idx); |
be663ab6 | 2068 | else if (is_siso(tbl->lq_type)) |
e7392364 SG |
2069 | il4965_rs_move_siso_to_other(il, lq_sta, conf, sta, |
2070 | idx); | |
2071 | else /* (is_mimo2(tbl->lq_type)) */ | |
2072 | il4965_rs_move_mimo2_to_other(il, lq_sta, conf, sta, | |
2073 | idx); | |
be663ab6 WYG |
2074 | |
2075 | /* If new "search" mode was selected, set up in uCode table */ | |
2076 | if (lq_sta->search_better_tbl) { | |
2077 | /* Access the "search" table, clear its history. */ | |
2078 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
2eb05816 | 2079 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 | 2080 | il4965_rs_rate_scale_clear_win(&(tbl->win[i])); |
be663ab6 WYG |
2081 | |
2082 | /* Use new "search" start rate */ | |
0c2c8852 | 2083 | idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
be663ab6 | 2084 | |
e7392364 SG |
2085 | D_RATE("Switch current mcs: %X idx: %d\n", |
2086 | tbl->current_rate, idx); | |
2087 | il4965_rs_fill_link_cmd(il, lq_sta, tbl->current_rate); | |
83007196 | 2088 | il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false); |
be663ab6 WYG |
2089 | } else |
2090 | done_search = 1; | |
2091 | } | |
2092 | ||
2093 | if (done_search && !lq_sta->stay_in_tbl) { | |
2094 | /* If the "active" (non-search) mode was legacy, | |
2095 | * and we've tried switching antennas, | |
2096 | * but we haven't been able to try HT modes (not available), | |
2097 | * stay with best antenna legacy modulation for a while | |
2098 | * before next round of mode comparisons. */ | |
2099 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2100 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && | |
2101 | lq_sta->action_counter > tbl1->max_search) { | |
58de00a4 | 2102 | D_RATE("LQ: STAY in legacy table\n"); |
46bc8d4b | 2103 | il4965_rs_set_stay_in_table(il, 1, lq_sta); |
be663ab6 WYG |
2104 | } |
2105 | ||
2106 | /* If we're in an HT mode, and all 3 mode switch actions | |
2107 | * have been tried and compared, stay in this best modulation | |
2108 | * mode for a while before next round of mode comparisons. */ | |
2109 | if (lq_sta->enable_counter && | |
232913b5 SG |
2110 | lq_sta->action_counter >= tbl1->max_search) { |
2111 | if (lq_sta->last_tpt > IL_AGG_TPT_THREHOLD && | |
be663ab6 | 2112 | (lq_sta->tx_agg_tid_en & (1 << tid)) && |
232913b5 | 2113 | tid != MAX_TID_COUNT) { |
be663ab6 | 2114 | tid_data = |
e7392364 | 2115 | &il->stations[lq_sta->lq.sta_id].tid[tid]; |
e2ebc833 | 2116 | if (tid_data->agg.state == IL_AGG_OFF) { |
e7392364 SG |
2117 | D_RATE("try to aggregate tid %d\n", |
2118 | tid); | |
46bc8d4b | 2119 | il4965_rs_tl_turn_on_agg(il, tid, |
e7392364 | 2120 | lq_sta, sta); |
be663ab6 WYG |
2121 | } |
2122 | } | |
46bc8d4b | 2123 | il4965_rs_set_stay_in_table(il, 0, lq_sta); |
be663ab6 WYG |
2124 | } |
2125 | } | |
2126 | ||
2127 | out: | |
e7392364 SG |
2128 | tbl->current_rate = |
2129 | il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green); | |
0c2c8852 | 2130 | i = idx; |
be663ab6 WYG |
2131 | lq_sta->last_txrate_idx = i; |
2132 | } | |
2133 | ||
2134 | /** | |
e2ebc833 | 2135 | * il4965_rs_initialize_lq - Initialize a station's hardware rate table |
be663ab6 WYG |
2136 | * |
2137 | * The uCode's station table contains a table of fallback rates | |
2138 | * for automatic fallback during transmission. | |
2139 | * | |
2140 | * NOTE: This sets up a default set of values. These will be replaced later | |
2141 | * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of | |
2142 | * rc80211_simple. | |
2143 | * | |
4d69c752 SG |
2144 | * NOTE: Run C_ADD_STA command to set up station table entry, before |
2145 | * calling this function (which runs C_TX_LINK_QUALITY_CMD, | |
be663ab6 WYG |
2146 | * which requires station table entry to exist). |
2147 | */ | |
e7392364 SG |
2148 | static void |
2149 | il4965_rs_initialize_lq(struct il_priv *il, struct ieee80211_conf *conf, | |
2150 | struct ieee80211_sta *sta, struct il_lq_sta *lq_sta) | |
be663ab6 | 2151 | { |
e2ebc833 | 2152 | struct il_scale_tbl_info *tbl; |
be663ab6 WYG |
2153 | int rate_idx; |
2154 | int i; | |
2155 | u32 rate; | |
1c03c462 | 2156 | u8 use_green = il4965_rs_use_green(il, sta); |
be663ab6 WYG |
2157 | u8 active_tbl = 0; |
2158 | u8 valid_tx_ant; | |
e2ebc833 | 2159 | struct il_station_priv *sta_priv; |
be663ab6 WYG |
2160 | |
2161 | if (!sta || !lq_sta) | |
2162 | return; | |
2163 | ||
2164 | sta_priv = (void *)sta->drv_priv; | |
be663ab6 WYG |
2165 | |
2166 | i = lq_sta->last_txrate_idx; | |
2167 | ||
46bc8d4b | 2168 | valid_tx_ant = il->hw_params.valid_tx_ant; |
be663ab6 WYG |
2169 | |
2170 | if (!lq_sta->search_better_tbl) | |
2171 | active_tbl = lq_sta->active_tbl; | |
2172 | else | |
2173 | active_tbl = 1 - lq_sta->active_tbl; | |
2174 | ||
2175 | tbl = &(lq_sta->lq_info[active_tbl]); | |
2176 | ||
2eb05816 | 2177 | if (i < 0 || i >= RATE_COUNT) |
be663ab6 WYG |
2178 | i = 0; |
2179 | ||
d2ddf621 | 2180 | rate = il_rates[i].plcp; |
e2ebc833 | 2181 | tbl->ant_type = il4965_first_antenna(valid_tx_ant); |
be663ab6 WYG |
2182 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; |
2183 | ||
e2ebc833 | 2184 | if (i >= IL_FIRST_CCK_RATE && i <= IL_LAST_CCK_RATE) |
be663ab6 WYG |
2185 | rate |= RATE_MCS_CCK_MSK; |
2186 | ||
46bc8d4b | 2187 | il4965_rs_get_tbl_info_from_mcs(rate, il->band, tbl, &rate_idx); |
e2ebc833 SG |
2188 | if (!il4965_rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2189 | il4965_rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
be663ab6 | 2190 | |
46bc8d4b | 2191 | rate = il4965_rate_n_flags_from_tbl(il, tbl, rate_idx, use_green); |
be663ab6 | 2192 | tbl->current_rate = rate; |
e2ebc833 SG |
2193 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
2194 | il4965_rs_fill_link_cmd(NULL, lq_sta, rate); | |
46bc8d4b | 2195 | il->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
83007196 | 2196 | il_send_lq_cmd(il, &lq_sta->lq, CMD_SYNC, true); |
be663ab6 WYG |
2197 | } |
2198 | ||
2199 | static void | |
46bc8d4b | 2200 | il4965_rs_get_rate(void *il_r, struct ieee80211_sta *sta, void *il_sta, |
e7392364 | 2201 | struct ieee80211_tx_rate_control *txrc) |
be663ab6 WYG |
2202 | { |
2203 | ||
2204 | struct sk_buff *skb = txrc->skb; | |
2205 | struct ieee80211_supported_band *sband = txrc->sband; | |
46bc8d4b | 2206 | struct il_priv *il __maybe_unused = (struct il_priv *)il_r; |
be663ab6 | 2207 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
46bc8d4b | 2208 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 WYG |
2209 | int rate_idx; |
2210 | ||
58de00a4 | 2211 | D_RATE("rate scale calculate new rate for skb\n"); |
be663ab6 WYG |
2212 | |
2213 | /* Get max rate if user set max rate */ | |
2214 | if (lq_sta) { | |
2215 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
232913b5 SG |
2216 | if (sband->band == IEEE80211_BAND_5GHZ && |
2217 | lq_sta->max_rate_idx != -1) | |
e2ebc833 | 2218 | lq_sta->max_rate_idx += IL_FIRST_OFDM_RATE; |
232913b5 | 2219 | if (lq_sta->max_rate_idx < 0 || |
2eb05816 | 2220 | lq_sta->max_rate_idx >= RATE_COUNT) |
be663ab6 WYG |
2221 | lq_sta->max_rate_idx = -1; |
2222 | } | |
2223 | ||
2224 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
2225 | if (lq_sta && !lq_sta->drv) { | |
58de00a4 | 2226 | D_RATE("Rate scaling not initialized yet.\n"); |
46bc8d4b | 2227 | il_sta = NULL; |
be663ab6 WYG |
2228 | } |
2229 | ||
2230 | /* Send management frames and NO_ACK data using lowest rate. */ | |
46bc8d4b | 2231 | if (rate_control_send_low(sta, il_sta, txrc)) |
be663ab6 WYG |
2232 | return; |
2233 | ||
0c34861e GD |
2234 | if (!lq_sta) |
2235 | return; | |
2236 | ||
e7392364 | 2237 | rate_idx = lq_sta->last_txrate_idx; |
be663ab6 WYG |
2238 | |
2239 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { | |
e2ebc833 | 2240 | rate_idx -= IL_FIRST_OFDM_RATE; |
0c2c8852 | 2241 | /* 6M and 9M shared same MCS idx */ |
be663ab6 | 2242 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; |
e2ebc833 | 2243 | if (il4965_rs_extract_rate(lq_sta->last_rate_n_flags) >= |
e7392364 | 2244 | RATE_MIMO2_6M_PLCP) |
2d09b062 | 2245 | rate_idx = rate_idx + MCS_IDX_PER_STREAM; |
be663ab6 WYG |
2246 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; |
2247 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2248 | info->control.rates[0].flags |= | |
e7392364 | 2249 | IEEE80211_TX_RC_SHORT_GI; |
be663ab6 WYG |
2250 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) |
2251 | info->control.rates[0].flags |= | |
e7392364 | 2252 | IEEE80211_TX_RC_DUP_DATA; |
be663ab6 WYG |
2253 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
2254 | info->control.rates[0].flags |= | |
e7392364 | 2255 | IEEE80211_TX_RC_40_MHZ_WIDTH; |
be663ab6 WYG |
2256 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) |
2257 | info->control.rates[0].flags |= | |
e7392364 | 2258 | IEEE80211_TX_RC_GREEN_FIELD; |
be663ab6 WYG |
2259 | } else { |
2260 | /* Check for invalid rates */ | |
2eb05816 | 2261 | if (rate_idx < 0 || rate_idx >= RATE_COUNT_LEGACY || |
232913b5 SG |
2262 | (sband->band == IEEE80211_BAND_5GHZ && |
2263 | rate_idx < IL_FIRST_OFDM_RATE)) | |
be663ab6 | 2264 | rate_idx = rate_lowest_index(sband, sta); |
0c2c8852 | 2265 | /* On valid 5 GHz rate, adjust idx */ |
be663ab6 | 2266 | else if (sband->band == IEEE80211_BAND_5GHZ) |
e2ebc833 | 2267 | rate_idx -= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2268 | info->control.rates[0].flags = 0; |
2269 | } | |
2270 | info->control.rates[0].idx = rate_idx; | |
2271 | ||
2272 | } | |
2273 | ||
e7392364 SG |
2274 | static void * |
2275 | il4965_rs_alloc_sta(void *il_rate, struct ieee80211_sta *sta, gfp_t gfp) | |
be663ab6 | 2276 | { |
e2ebc833 | 2277 | struct il_station_priv *sta_priv = |
e7392364 | 2278 | (struct il_station_priv *)sta->drv_priv; |
46bc8d4b | 2279 | struct il_priv *il; |
be663ab6 | 2280 | |
46bc8d4b | 2281 | il = (struct il_priv *)il_rate; |
6ce1dc45 | 2282 | D_RATE("create station rate scale win\n"); |
be663ab6 | 2283 | |
3e4b0655 | 2284 | return &sta_priv->lq_sta; |
be663ab6 WYG |
2285 | } |
2286 | ||
2287 | /* | |
2288 | * Called after adding a new station to initialize rate scaling | |
2289 | */ | |
2290 | void | |
e7392364 | 2291 | il4965_rs_rate_init(struct il_priv *il, struct ieee80211_sta *sta, u8 sta_id) |
be663ab6 WYG |
2292 | { |
2293 | int i, j; | |
46bc8d4b SG |
2294 | struct ieee80211_hw *hw = il->hw; |
2295 | struct ieee80211_conf *conf = &il->hw->conf; | |
be663ab6 | 2296 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e2ebc833 SG |
2297 | struct il_station_priv *sta_priv; |
2298 | struct il_lq_sta *lq_sta; | |
be663ab6 WYG |
2299 | struct ieee80211_supported_band *sband; |
2300 | ||
e7392364 | 2301 | sta_priv = (struct il_station_priv *)sta->drv_priv; |
be663ab6 WYG |
2302 | lq_sta = &sta_priv->lq_sta; |
2303 | sband = hw->wiphy->bands[conf->channel->band]; | |
2304 | ||
be663ab6 WYG |
2305 | lq_sta->lq.sta_id = sta_id; |
2306 | ||
2307 | for (j = 0; j < LQ_SIZE; j++) | |
2eb05816 | 2308 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 SG |
2309 | il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j]. |
2310 | win[i]); | |
be663ab6 WYG |
2311 | |
2312 | lq_sta->flush_timer = 0; | |
2313 | lq_sta->supp_rates = sta->supp_rates[sband->band]; | |
2314 | for (j = 0; j < LQ_SIZE; j++) | |
2eb05816 | 2315 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 SG |
2316 | il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j]. |
2317 | win[i]); | |
be663ab6 | 2318 | |
e7392364 SG |
2319 | D_RATE("LQ:" "*** rate scale station global init for station %d ***\n", |
2320 | sta_id); | |
be663ab6 WYG |
2321 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2322 | * the lowest or the highest rate.. Could consider using RSSI from | |
2323 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2324 | * after assoc.. */ | |
2325 | ||
2326 | lq_sta->is_dup = 0; | |
2327 | lq_sta->max_rate_idx = -1; | |
e2ebc833 | 2328 | lq_sta->missed_rate_counter = IL_MISSED_RATE_MAX; |
1c03c462 | 2329 | lq_sta->is_green = il4965_rs_use_green(il, sta); |
46bc8d4b SG |
2330 | lq_sta->active_legacy_rate = il->active_rate & ~(0x1000); |
2331 | lq_sta->band = il->band; | |
be663ab6 WYG |
2332 | /* |
2333 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2334 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2335 | */ | |
2336 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; | |
2337 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
e7392364 | 2338 | lq_sta->active_siso_rate &= ~((u16) 0x2); |
e2ebc833 | 2339 | lq_sta->active_siso_rate <<= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2340 | |
2341 | /* Same here */ | |
2342 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; | |
2343 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
e7392364 | 2344 | lq_sta->active_mimo2_rate &= ~((u16) 0x2); |
e2ebc833 | 2345 | lq_sta->active_mimo2_rate <<= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2346 | |
2347 | /* These values will be overridden later */ | |
2348 | lq_sta->lq.general_params.single_stream_ant_msk = | |
e7392364 | 2349 | il4965_first_antenna(il->hw_params.valid_tx_ant); |
be663ab6 | 2350 | lq_sta->lq.general_params.dual_stream_ant_msk = |
e7392364 SG |
2351 | il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params. |
2352 | valid_tx_ant); | |
be663ab6 WYG |
2353 | if (!lq_sta->lq.general_params.dual_stream_ant_msk) { |
2354 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
46bc8d4b | 2355 | } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { |
be663ab6 | 2356 | lq_sta->lq.general_params.dual_stream_ant_msk = |
e7392364 | 2357 | il->hw_params.valid_tx_ant; |
be663ab6 WYG |
2358 | } |
2359 | ||
2360 | /* as default allow aggregation for all tids */ | |
e2ebc833 | 2361 | lq_sta->tx_agg_tid_en = IL_AGG_ALL_TID; |
46bc8d4b | 2362 | lq_sta->drv = il; |
be663ab6 WYG |
2363 | |
2364 | /* Set last_txrate_idx to lowest rate */ | |
2365 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2366 | if (sband->band == IEEE80211_BAND_5GHZ) | |
e2ebc833 | 2367 | lq_sta->last_txrate_idx += IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2368 | lq_sta->is_agg = 0; |
2369 | ||
2370 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2371 | lq_sta->dbg_fixed_rate = 0; | |
2372 | #endif | |
2373 | ||
46bc8d4b | 2374 | il4965_rs_initialize_lq(il, conf, sta, lq_sta); |
be663ab6 WYG |
2375 | } |
2376 | ||
e7392364 SG |
2377 | static void |
2378 | il4965_rs_fill_link_cmd(struct il_priv *il, struct il_lq_sta *lq_sta, | |
2379 | u32 new_rate) | |
be663ab6 | 2380 | { |
e2ebc833 | 2381 | struct il_scale_tbl_info tbl_type; |
0c2c8852 | 2382 | int idx = 0; |
be663ab6 WYG |
2383 | int rate_idx; |
2384 | int repeat_rate = 0; | |
2385 | u8 ant_toggle_cnt = 0; | |
2386 | u8 use_ht_possible = 1; | |
2387 | u8 valid_tx_ant = 0; | |
e2ebc833 | 2388 | struct il_link_quality_cmd *lq_cmd = &lq_sta->lq; |
be663ab6 | 2389 | |
0c2c8852 SG |
2390 | /* Override starting rate (idx 0) if needed for debug purposes */ |
2391 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); | |
be663ab6 WYG |
2392 | |
2393 | /* Interpret new_rate (rate_n_flags) */ | |
e7392364 SG |
2394 | il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
2395 | &rate_idx); | |
be663ab6 WYG |
2396 | |
2397 | /* How many times should we repeat the initial rate? */ | |
2398 | if (is_legacy(tbl_type.lq_type)) { | |
2399 | ant_toggle_cnt = 1; | |
e2ebc833 | 2400 | repeat_rate = IL_NUMBER_TRY; |
be663ab6 | 2401 | } else { |
e2ebc833 | 2402 | repeat_rate = IL_HT_NUMBER_TRY; |
be663ab6 WYG |
2403 | } |
2404 | ||
2405 | lq_cmd->general_params.mimo_delimiter = | |
e7392364 | 2406 | is_mimo(tbl_type.lq_type) ? 1 : 0; |
be663ab6 | 2407 | |
0c2c8852 SG |
2408 | /* Fill 1st table entry (idx 0) */ |
2409 | lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate); | |
be663ab6 | 2410 | |
e2ebc833 | 2411 | if (il4965_num_of_ant(tbl_type.ant_type) == 1) { |
be663ab6 | 2412 | lq_cmd->general_params.single_stream_ant_msk = |
e7392364 | 2413 | tbl_type.ant_type; |
e2ebc833 | 2414 | } else if (il4965_num_of_ant(tbl_type.ant_type) == 2) { |
e7392364 SG |
2415 | lq_cmd->general_params.dual_stream_ant_msk = tbl_type.ant_type; |
2416 | } | |
2417 | /* otherwise we don't modify the existing value */ | |
0c2c8852 | 2418 | idx++; |
be663ab6 | 2419 | repeat_rate--; |
46bc8d4b SG |
2420 | if (il) |
2421 | valid_tx_ant = il->hw_params.valid_tx_ant; | |
be663ab6 WYG |
2422 | |
2423 | /* Fill rest of rate table */ | |
0c2c8852 | 2424 | while (idx < LINK_QUAL_MAX_RETRY_NUM) { |
be663ab6 | 2425 | /* Repeat initial/next rate. |
e2ebc833 SG |
2426 | * For legacy IL_NUMBER_TRY == 1, this loop will not execute. |
2427 | * For HT IL_HT_NUMBER_TRY == 3, this executes twice. */ | |
0c2c8852 | 2428 | while (repeat_rate > 0 && idx < LINK_QUAL_MAX_RETRY_NUM) { |
be663ab6 WYG |
2429 | if (is_legacy(tbl_type.lq_type)) { |
2430 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) | |
2431 | ant_toggle_cnt++; | |
46bc8d4b | 2432 | else if (il && |
e2ebc833 | 2433 | il4965_rs_toggle_antenna(valid_tx_ant, |
e7392364 SG |
2434 | &new_rate, |
2435 | &tbl_type)) | |
be663ab6 WYG |
2436 | ant_toggle_cnt = 1; |
2437 | } | |
2438 | ||
2439 | /* Override next rate if needed for debug purposes */ | |
0c2c8852 | 2440 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); |
be663ab6 WYG |
2441 | |
2442 | /* Fill next table entry */ | |
0c2c8852 | 2443 | lq_cmd->rs_table[idx].rate_n_flags = |
e7392364 | 2444 | cpu_to_le32(new_rate); |
be663ab6 | 2445 | repeat_rate--; |
0c2c8852 | 2446 | idx++; |
be663ab6 WYG |
2447 | } |
2448 | ||
e7392364 SG |
2449 | il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
2450 | &tbl_type, &rate_idx); | |
be663ab6 WYG |
2451 | |
2452 | /* Indicate to uCode which entries might be MIMO. | |
2453 | * If initial rate was MIMO, this will finally end up | |
e2ebc833 | 2454 | * as (IL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ |
be663ab6 | 2455 | if (is_mimo(tbl_type.lq_type)) |
0c2c8852 | 2456 | lq_cmd->general_params.mimo_delimiter = idx; |
be663ab6 WYG |
2457 | |
2458 | /* Get next rate */ | |
e7392364 SG |
2459 | new_rate = |
2460 | il4965_rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, | |
be663ab6 WYG |
2461 | use_ht_possible); |
2462 | ||
2463 | /* How many times should we repeat the next rate? */ | |
2464 | if (is_legacy(tbl_type.lq_type)) { | |
2465 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) | |
2466 | ant_toggle_cnt++; | |
46bc8d4b | 2467 | else if (il && |
e2ebc833 | 2468 | il4965_rs_toggle_antenna(valid_tx_ant, |
e7392364 | 2469 | &new_rate, &tbl_type)) |
be663ab6 WYG |
2470 | ant_toggle_cnt = 1; |
2471 | ||
e2ebc833 | 2472 | repeat_rate = IL_NUMBER_TRY; |
be663ab6 | 2473 | } else { |
e2ebc833 | 2474 | repeat_rate = IL_HT_NUMBER_TRY; |
be663ab6 WYG |
2475 | } |
2476 | ||
2477 | /* Don't allow HT rates after next pass. | |
e2ebc833 | 2478 | * il4965_rs_get_lower_rate() will change type to LQ_A or LQ_G. */ |
be663ab6 WYG |
2479 | use_ht_possible = 0; |
2480 | ||
2481 | /* Override next rate if needed for debug purposes */ | |
0c2c8852 | 2482 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); |
be663ab6 WYG |
2483 | |
2484 | /* Fill next table entry */ | |
0c2c8852 | 2485 | lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate); |
be663ab6 | 2486 | |
0c2c8852 | 2487 | idx++; |
be663ab6 WYG |
2488 | repeat_rate--; |
2489 | } | |
2490 | ||
2491 | lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
2492 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; | |
2493 | ||
2494 | lq_cmd->agg_params.agg_time_limit = | |
e7392364 | 2495 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); |
be663ab6 WYG |
2496 | } |
2497 | ||
e7392364 SG |
2498 | static void * |
2499 | il4965_rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) | |
be663ab6 WYG |
2500 | { |
2501 | return hw->priv; | |
2502 | } | |
e7392364 | 2503 | |
be663ab6 | 2504 | /* rate scale requires free function to be implemented */ |
e7392364 SG |
2505 | static void |
2506 | il4965_rs_free(void *il_rate) | |
be663ab6 WYG |
2507 | { |
2508 | return; | |
2509 | } | |
2510 | ||
e7392364 SG |
2511 | static void |
2512 | il4965_rs_free_sta(void *il_r, struct ieee80211_sta *sta, void *il_sta) | |
be663ab6 | 2513 | { |
46bc8d4b | 2514 | struct il_priv *il __maybe_unused = il_r; |
be663ab6 | 2515 | |
58de00a4 SG |
2516 | D_RATE("enter\n"); |
2517 | D_RATE("leave\n"); | |
be663ab6 WYG |
2518 | } |
2519 | ||
be663ab6 | 2520 | #ifdef CONFIG_MAC80211_DEBUGFS |
e7392364 SG |
2521 | |
2522 | static void | |
2523 | il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx) | |
be663ab6 | 2524 | { |
46bc8d4b | 2525 | struct il_priv *il; |
be663ab6 WYG |
2526 | u8 valid_tx_ant; |
2527 | u8 ant_sel_tx; | |
2528 | ||
46bc8d4b SG |
2529 | il = lq_sta->drv; |
2530 | valid_tx_ant = il->hw_params.valid_tx_ant; | |
be663ab6 WYG |
2531 | if (lq_sta->dbg_fixed_rate) { |
2532 | ant_sel_tx = | |
e7392364 SG |
2533 | ((lq_sta-> |
2534 | dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >> | |
2535 | RATE_MCS_ANT_POS); | |
be663ab6 WYG |
2536 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { |
2537 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
58de00a4 | 2538 | D_RATE("Fixed rate ON\n"); |
be663ab6 WYG |
2539 | } else { |
2540 | lq_sta->dbg_fixed_rate = 0; | |
e7392364 SG |
2541 | IL_ERR |
2542 | ("Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
2543 | ant_sel_tx, valid_tx_ant); | |
58de00a4 | 2544 | D_RATE("Fixed rate OFF\n"); |
be663ab6 WYG |
2545 | } |
2546 | } else { | |
58de00a4 | 2547 | D_RATE("Fixed rate OFF\n"); |
be663ab6 WYG |
2548 | } |
2549 | } | |
2550 | ||
e7392364 SG |
2551 | static ssize_t |
2552 | il4965_rs_sta_dbgfs_scale_table_write(struct file *file, | |
1722f8e1 SG |
2553 | const char __user *user_buf, |
2554 | size_t count, loff_t *ppos) | |
be663ab6 | 2555 | { |
e2ebc833 | 2556 | struct il_lq_sta *lq_sta = file->private_data; |
46bc8d4b | 2557 | struct il_priv *il; |
be663ab6 | 2558 | char buf[64]; |
8220ba3e | 2559 | size_t buf_size; |
be663ab6 | 2560 | u32 parsed_rate; |
be663ab6 | 2561 | |
46bc8d4b | 2562 | il = lq_sta->drv; |
be663ab6 | 2563 | memset(buf, 0, sizeof(buf)); |
e7392364 | 2564 | buf_size = min(count, sizeof(buf) - 1); |
be663ab6 WYG |
2565 | if (copy_from_user(buf, user_buf, buf_size)) |
2566 | return -EFAULT; | |
2567 | ||
2568 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
2569 | lq_sta->dbg_fixed_rate = parsed_rate; | |
2570 | else | |
2571 | lq_sta->dbg_fixed_rate = 0; | |
2572 | ||
2573 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
e7392364 SG |
2574 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ |
2575 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
be663ab6 | 2576 | |
e7392364 SG |
2577 | D_RATE("sta_id %d rate 0x%X\n", lq_sta->lq.sta_id, |
2578 | lq_sta->dbg_fixed_rate); | |
be663ab6 WYG |
2579 | |
2580 | if (lq_sta->dbg_fixed_rate) { | |
e2ebc833 | 2581 | il4965_rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
83007196 | 2582 | il_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC, false); |
be663ab6 WYG |
2583 | } |
2584 | ||
2585 | return count; | |
2586 | } | |
2587 | ||
e7392364 | 2588 | static ssize_t |
1722f8e1 SG |
2589 | il4965_rs_sta_dbgfs_scale_table_read(struct file *file, char __user *user_buf, |
2590 | size_t count, loff_t *ppos) | |
be663ab6 WYG |
2591 | { |
2592 | char *buff; | |
2593 | int desc = 0; | |
2594 | int i = 0; | |
0c2c8852 | 2595 | int idx = 0; |
be663ab6 WYG |
2596 | ssize_t ret; |
2597 | ||
e2ebc833 | 2598 | struct il_lq_sta *lq_sta = file->private_data; |
46bc8d4b | 2599 | struct il_priv *il; |
e2ebc833 | 2600 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
be663ab6 | 2601 | |
46bc8d4b | 2602 | il = lq_sta->drv; |
be663ab6 WYG |
2603 | buff = kmalloc(1024, GFP_KERNEL); |
2604 | if (!buff) | |
2605 | return -ENOMEM; | |
2606 | ||
e7392364 SG |
2607 | desc += sprintf(buff + desc, "sta_id %d\n", lq_sta->lq.sta_id); |
2608 | desc += | |
2609 | sprintf(buff + desc, "failed=%d success=%d rate=0%X\n", | |
2610 | lq_sta->total_failed, lq_sta->total_success, | |
2611 | lq_sta->active_legacy_rate); | |
2612 | desc += | |
2613 | sprintf(buff + desc, "fixed rate 0x%X\n", lq_sta->dbg_fixed_rate); | |
2614 | desc += | |
2615 | sprintf(buff + desc, "valid_tx_ant %s%s%s\n", | |
2616 | (il->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", | |
2617 | (il->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2618 | (il->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
2619 | desc += | |
2620 | sprintf(buff + desc, "lq type %s\n", | |
2621 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
be663ab6 | 2622 | if (is_Ht(tbl->lq_type)) { |
e7392364 SG |
2623 | desc += |
2624 | sprintf(buff + desc, " %s", | |
2625 | (is_siso(tbl->lq_type)) ? "SISO" : "MIMO2"); | |
2626 | desc += | |
2627 | sprintf(buff + desc, " %s", | |
2628 | (tbl->is_ht40) ? "40MHz" : "20MHz"); | |
2629 | desc += | |
2630 | sprintf(buff + desc, " %s %s %s\n", | |
2631 | (tbl->is_SGI) ? "SGI" : "", | |
2632 | (lq_sta->is_green) ? "GF enabled" : "", | |
2633 | (lq_sta->is_agg) ? "AGG on" : ""); | |
be663ab6 | 2634 | } |
e7392364 SG |
2635 | desc += |
2636 | sprintf(buff + desc, "last tx rate=0x%X\n", | |
2637 | lq_sta->last_rate_n_flags); | |
2638 | desc += | |
2639 | sprintf(buff + desc, | |
2640 | "general:" "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
2641 | lq_sta->lq.general_params.flags, | |
2642 | lq_sta->lq.general_params.mimo_delimiter, | |
2643 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2644 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
2645 | ||
2646 | desc += | |
2647 | sprintf(buff + desc, | |
2648 | "agg:" | |
2649 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2650 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), | |
2651 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2652 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
2653 | ||
2654 | desc += | |
2655 | sprintf(buff + desc, | |
2656 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2657 | lq_sta->lq.general_params.start_rate_idx[0], | |
2658 | lq_sta->lq.general_params.start_rate_idx[1], | |
2659 | lq_sta->lq.general_params.start_rate_idx[2], | |
2660 | lq_sta->lq.general_params.start_rate_idx[3]); | |
be663ab6 WYG |
2661 | |
2662 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
e7392364 SG |
2663 | idx = |
2664 | il4965_hwrate_to_plcp_idx(le32_to_cpu | |
2665 | (lq_sta->lq.rs_table[i]. | |
2666 | rate_n_flags)); | |
be663ab6 | 2667 | if (is_legacy(tbl->lq_type)) { |
e7392364 SG |
2668 | desc += |
2669 | sprintf(buff + desc, " rate[%d] 0x%X %smbps\n", i, | |
2670 | le32_to_cpu(lq_sta->lq.rs_table[i]. | |
2671 | rate_n_flags), | |
2672 | il_rate_mcs[idx].mbps); | |
be663ab6 | 2673 | } else { |
e7392364 SG |
2674 | desc += |
2675 | sprintf(buff + desc, " rate[%d] 0x%X %smbps (%s)\n", | |
2676 | i, | |
2677 | le32_to_cpu(lq_sta->lq.rs_table[i]. | |
2678 | rate_n_flags), | |
2679 | il_rate_mcs[idx].mbps, | |
2680 | il_rate_mcs[idx].mcs); | |
be663ab6 WYG |
2681 | } |
2682 | } | |
2683 | ||
2684 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2685 | kfree(buff); | |
2686 | return ret; | |
2687 | } | |
2688 | ||
2689 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
e2ebc833 SG |
2690 | .write = il4965_rs_sta_dbgfs_scale_table_write, |
2691 | .read = il4965_rs_sta_dbgfs_scale_table_read, | |
234e3405 | 2692 | .open = simple_open, |
be663ab6 WYG |
2693 | .llseek = default_llseek, |
2694 | }; | |
e7392364 SG |
2695 | |
2696 | static ssize_t | |
1722f8e1 SG |
2697 | il4965_rs_sta_dbgfs_stats_table_read(struct file *file, char __user *user_buf, |
2698 | size_t count, loff_t *ppos) | |
be663ab6 WYG |
2699 | { |
2700 | char *buff; | |
2701 | int desc = 0; | |
2702 | int i, j; | |
2703 | ssize_t ret; | |
2704 | ||
e2ebc833 | 2705 | struct il_lq_sta *lq_sta = file->private_data; |
be663ab6 WYG |
2706 | |
2707 | buff = kmalloc(1024, GFP_KERNEL); | |
2708 | if (!buff) | |
2709 | return -ENOMEM; | |
2710 | ||
2711 | for (i = 0; i < LQ_SIZE; i++) { | |
e7392364 SG |
2712 | desc += |
2713 | sprintf(buff + desc, | |
2714 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
2715 | "rate=0x%X\n", lq_sta->active_tbl == i ? "*" : "x", | |
2716 | lq_sta->lq_info[i].lq_type, | |
2717 | lq_sta->lq_info[i].is_SGI, | |
2718 | lq_sta->lq_info[i].is_ht40, | |
2719 | lq_sta->lq_info[i].is_dup, lq_sta->is_green, | |
2720 | lq_sta->lq_info[i].current_rate); | |
2eb05816 | 2721 | for (j = 0; j < RATE_COUNT; j++) { |
e7392364 SG |
2722 | desc += |
2723 | sprintf(buff + desc, | |
2724 | "counter=%d success=%d %%=%d\n", | |
2725 | lq_sta->lq_info[i].win[j].counter, | |
2726 | lq_sta->lq_info[i].win[j].success_counter, | |
2727 | lq_sta->lq_info[i].win[j].success_ratio); | |
be663ab6 WYG |
2728 | } |
2729 | } | |
2730 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2731 | kfree(buff); | |
2732 | return ret; | |
2733 | } | |
2734 | ||
2735 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
e2ebc833 | 2736 | .read = il4965_rs_sta_dbgfs_stats_table_read, |
234e3405 | 2737 | .open = simple_open, |
be663ab6 WYG |
2738 | .llseek = default_llseek, |
2739 | }; | |
2740 | ||
e7392364 SG |
2741 | static ssize_t |
2742 | il4965_rs_sta_dbgfs_rate_scale_data_read(struct file *file, | |
1722f8e1 SG |
2743 | char __user *user_buf, size_t count, |
2744 | loff_t *ppos) | |
be663ab6 WYG |
2745 | { |
2746 | char buff[120]; | |
2747 | int desc = 0; | |
e2ebc833 | 2748 | struct il_lq_sta *lq_sta = file->private_data; |
e2ebc833 | 2749 | struct il_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; |
be663ab6 | 2750 | |
be663ab6 | 2751 | if (is_Ht(tbl->lq_type)) |
e7392364 SG |
2752 | desc += |
2753 | sprintf(buff + desc, "Bit Rate= %d Mb/s\n", | |
2754 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
be663ab6 | 2755 | else |
e7392364 SG |
2756 | desc += |
2757 | sprintf(buff + desc, "Bit Rate= %d Mb/s\n", | |
2758 | il_rates[lq_sta->last_txrate_idx].ieee >> 1); | |
be663ab6 | 2759 | |
e3a2c775 | 2760 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
be663ab6 WYG |
2761 | } |
2762 | ||
2763 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
e2ebc833 | 2764 | .read = il4965_rs_sta_dbgfs_rate_scale_data_read, |
234e3405 | 2765 | .open = simple_open, |
be663ab6 WYG |
2766 | .llseek = default_llseek, |
2767 | }; | |
2768 | ||
e7392364 SG |
2769 | static void |
2770 | il4965_rs_add_debugfs(void *il, void *il_sta, struct dentry *dir) | |
be663ab6 | 2771 | { |
46bc8d4b | 2772 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 | 2773 | lq_sta->rs_sta_dbgfs_scale_table_file = |
e7392364 | 2774 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
be663ab6 WYG |
2775 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2776 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
e7392364 SG |
2777 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, lq_sta, |
2778 | &rs_sta_dbgfs_stats_table_ops); | |
be663ab6 | 2779 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = |
e7392364 SG |
2780 | debugfs_create_file("rate_scale_data", S_IRUSR, dir, lq_sta, |
2781 | &rs_sta_dbgfs_rate_scale_data_ops); | |
be663ab6 | 2782 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
e7392364 SG |
2783 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, |
2784 | &lq_sta->tx_agg_tid_en); | |
be663ab6 WYG |
2785 | |
2786 | } | |
2787 | ||
e7392364 SG |
2788 | static void |
2789 | il4965_rs_remove_debugfs(void *il, void *il_sta) | |
be663ab6 | 2790 | { |
46bc8d4b | 2791 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 WYG |
2792 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2793 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
2794 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); | |
2795 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); | |
2796 | } | |
2797 | #endif | |
2798 | ||
2799 | /* | |
2800 | * Initialization of rate scaling information is done by driver after | |
2801 | * the station is added. Since mac80211 calls this function before a | |
2802 | * station is added we ignore it. | |
2803 | */ | |
2804 | static void | |
46bc8d4b SG |
2805 | il4965_rs_rate_init_stub(void *il_r, struct ieee80211_supported_band *sband, |
2806 | struct ieee80211_sta *sta, void *il_sta) | |
be663ab6 WYG |
2807 | { |
2808 | } | |
e7392364 | 2809 | |
be663ab6 WYG |
2810 | static struct rate_control_ops rs_4965_ops = { |
2811 | .module = NULL, | |
d3175167 | 2812 | .name = IL4965_RS_NAME, |
e2ebc833 SG |
2813 | .tx_status = il4965_rs_tx_status, |
2814 | .get_rate = il4965_rs_get_rate, | |
2815 | .rate_init = il4965_rs_rate_init_stub, | |
2816 | .alloc = il4965_rs_alloc, | |
2817 | .free = il4965_rs_free, | |
2818 | .alloc_sta = il4965_rs_alloc_sta, | |
2819 | .free_sta = il4965_rs_free_sta, | |
be663ab6 | 2820 | #ifdef CONFIG_MAC80211_DEBUGFS |
e2ebc833 SG |
2821 | .add_sta_debugfs = il4965_rs_add_debugfs, |
2822 | .remove_sta_debugfs = il4965_rs_remove_debugfs, | |
be663ab6 WYG |
2823 | #endif |
2824 | }; | |
2825 | ||
e7392364 SG |
2826 | int |
2827 | il4965_rate_control_register(void) | |
be663ab6 | 2828 | { |
be663ab6 WYG |
2829 | return ieee80211_rate_control_register(&rs_4965_ops); |
2830 | } | |
2831 | ||
e7392364 SG |
2832 | void |
2833 | il4965_rate_control_unregister(void) | |
be663ab6 WYG |
2834 | { |
2835 | ieee80211_rate_control_unregister(&rs_4965_ops); | |
2836 | } |