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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> | |
be663ab6 WYG |
27 | #include <linux/skbuff.h> |
28 | #include <linux/slab.h> | |
be663ab6 WYG |
29 | #include <net/mac80211.h> |
30 | ||
31 | #include <linux/netdevice.h> | |
32 | #include <linux/etherdevice.h> | |
33 | #include <linux/delay.h> | |
34 | ||
35 | #include <linux/workqueue.h> | |
36 | ||
98613be0 | 37 | #include "common.h" |
af038f40 | 38 | #include "4965.h" |
be663ab6 | 39 | |
d3175167 | 40 | #define IL4965_RS_NAME "iwl-4965-rs" |
be663ab6 WYG |
41 | |
42 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 | |
e2ebc833 SG |
43 | #define IL_NUMBER_TRY 1 |
44 | #define IL_HT_NUMBER_TRY 3 | |
be663ab6 | 45 | |
2eb05816 SG |
46 | #define RATE_MAX_WINDOW 62 /* # tx in history win */ |
47 | #define RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
48 | #define RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
be663ab6 WYG |
49 | |
50 | /* max allowed rate miss before sync LQ cmd */ | |
e2ebc833 | 51 | #define IL_MISSED_RATE_MAX 15 |
be663ab6 | 52 | /* max time to accum history 2 seconds */ |
2eb05816 | 53 | #define RATE_SCALE_FLUSH_INTVL (3*HZ) |
be663ab6 WYG |
54 | |
55 | static u8 rs_ht_to_legacy[] = { | |
2d09b062 SG |
56 | RATE_6M_IDX, RATE_6M_IDX, |
57 | RATE_6M_IDX, RATE_6M_IDX, | |
58 | RATE_6M_IDX, | |
59 | RATE_6M_IDX, RATE_9M_IDX, | |
60 | RATE_12M_IDX, RATE_18M_IDX, | |
61 | RATE_24M_IDX, RATE_36M_IDX, | |
62 | RATE_48M_IDX, RATE_54M_IDX | |
be663ab6 WYG |
63 | }; |
64 | ||
65 | static const u8 ant_toggle_lookup[] = { | |
66 | /*ANT_NONE -> */ ANT_NONE, | |
67 | /*ANT_A -> */ ANT_B, | |
68 | /*ANT_B -> */ ANT_C, | |
69 | /*ANT_AB -> */ ANT_BC, | |
70 | /*ANT_C -> */ ANT_A, | |
71 | /*ANT_AC -> */ ANT_AB, | |
72 | /*ANT_BC -> */ ANT_AC, | |
73 | /*ANT_ABC -> */ ANT_ABC, | |
74 | }; | |
75 | ||
e2ebc833 | 76 | #define IL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ |
2d09b062 | 77 | [RATE_##r##M_IDX] = { RATE_##r##M_PLCP, \ |
2eb05816 SG |
78 | RATE_SISO_##s##M_PLCP, \ |
79 | RATE_MIMO2_##s##M_PLCP,\ | |
80 | RATE_##r##M_IEEE, \ | |
2d09b062 SG |
81 | RATE_##ip##M_IDX, \ |
82 | RATE_##in##M_IDX, \ | |
83 | RATE_##rp##M_IDX, \ | |
84 | RATE_##rn##M_IDX, \ | |
85 | RATE_##pp##M_IDX, \ | |
86 | RATE_##np##M_IDX } | |
be663ab6 WYG |
87 | |
88 | /* | |
89 | * Parameter order: | |
90 | * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate | |
91 | * | |
92 | * If there isn't a valid next or previous rate then INV is used which | |
2eb05816 | 93 | * maps to RATE_INVALID |
be663ab6 WYG |
94 | * |
95 | */ | |
2eb05816 | 96 | const struct il_rate_info il_rates[RATE_COUNT] = { |
e7392364 | 97 | IL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ |
1722f8e1 | 98 | IL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ |
e7392364 SG |
99 | IL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ |
100 | IL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ | |
1722f8e1 | 101 | IL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ |
e7392364 SG |
102 | IL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ |
103 | IL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ | |
104 | IL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ | |
105 | IL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ | |
106 | IL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ | |
107 | IL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ | |
1722f8e1 SG |
108 | IL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ |
109 | IL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ | |
be663ab6 WYG |
110 | }; |
111 | ||
e7392364 SG |
112 | static int |
113 | il4965_hwrate_to_plcp_idx(u32 rate_n_flags) | |
be663ab6 WYG |
114 | { |
115 | int idx = 0; | |
116 | ||
117 | /* HT rate format */ | |
118 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
119 | idx = (rate_n_flags & 0xff); | |
120 | ||
2eb05816 SG |
121 | if (idx >= RATE_MIMO2_6M_PLCP) |
122 | idx = idx - RATE_MIMO2_6M_PLCP; | |
be663ab6 | 123 | |
e2ebc833 | 124 | idx += IL_FIRST_OFDM_RATE; |
e7392364 | 125 | /* skip 9M not supported in ht */ |
2d09b062 | 126 | if (idx >= RATE_9M_IDX) |
be663ab6 | 127 | idx += 1; |
232913b5 | 128 | if (idx >= IL_FIRST_OFDM_RATE && idx <= IL_LAST_OFDM_RATE) |
be663ab6 WYG |
129 | return idx; |
130 | ||
e7392364 | 131 | /* legacy rate format, search for match in table */ |
be663ab6 | 132 | } else { |
d2ddf621 SG |
133 | for (idx = 0; idx < ARRAY_SIZE(il_rates); idx++) |
134 | if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) | |
be663ab6 WYG |
135 | return idx; |
136 | } | |
137 | ||
138 | return -1; | |
139 | } | |
140 | ||
46bc8d4b | 141 | static void il4965_rs_rate_scale_perform(struct il_priv *il, |
e7392364 SG |
142 | struct sk_buff *skb, |
143 | struct ieee80211_sta *sta, | |
144 | struct il_lq_sta *lq_sta); | |
46bc8d4b | 145 | static void il4965_rs_fill_link_cmd(struct il_priv *il, |
e7392364 | 146 | struct il_lq_sta *lq_sta, u32 rate_n_flags); |
e2ebc833 | 147 | static void il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, |
e7392364 | 148 | bool force_search); |
be663ab6 WYG |
149 | |
150 | #ifdef CONFIG_MAC80211_DEBUGFS | |
e2ebc833 | 151 | static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, |
1722f8e1 | 152 | u32 *rate_n_flags, int idx); |
be663ab6 | 153 | #else |
e7392364 SG |
154 | static void |
155 | il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx) | |
156 | { | |
157 | } | |
be663ab6 WYG |
158 | #endif |
159 | ||
160 | /** | |
161 | * The following tables contain the expected throughput metrics for all rates | |
162 | * | |
163 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
164 | * | |
165 | * where invalid entries are zeros. | |
166 | * | |
167 | * CCK rates are only valid in legacy table and will only be used in G | |
168 | * (2.4 GHz) band. | |
169 | */ | |
170 | ||
2eb05816 | 171 | static s32 expected_tpt_legacy[RATE_COUNT] = { |
be663ab6 WYG |
172 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 |
173 | }; | |
174 | ||
2eb05816 | 175 | static s32 expected_tpt_siso20MHz[4][RATE_COUNT] = { |
e7392364 SG |
176 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 158, 183, 193, 202}, /* Norm */ |
177 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 167, 192, 202, 210}, /* SGI */ | |
178 | {0, 0, 0, 0, 48, 0, 93, 135, 176, 251, 319, 351, 381}, /* AGG */ | |
179 | {0, 0, 0, 0, 53, 0, 102, 149, 193, 275, 348, 381, 413}, /* AGG+SGI */ | |
be663ab6 WYG |
180 | }; |
181 | ||
2eb05816 | 182 | static s32 expected_tpt_siso40MHz[4][RATE_COUNT] = { |
e7392364 SG |
183 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ |
184 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ | |
185 | {0, 0, 0, 0, 96, 0, 182, 259, 328, 451, 553, 598, 640}, /* AGG */ | |
186 | {0, 0, 0, 0, 106, 0, 199, 282, 357, 487, 593, 640, 683}, /* AGG+SGI */ | |
be663ab6 WYG |
187 | }; |
188 | ||
2eb05816 | 189 | static s32 expected_tpt_mimo2_20MHz[4][RATE_COUNT] = { |
e7392364 SG |
190 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250}, /* Norm */ |
191 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256}, /* SGI */ | |
192 | {0, 0, 0, 0, 92, 0, 175, 250, 317, 436, 534, 578, 619}, /* AGG */ | |
193 | {0, 0, 0, 0, 102, 0, 192, 273, 344, 470, 573, 619, 660}, /* AGG+SGI */ | |
be663ab6 WYG |
194 | }; |
195 | ||
2eb05816 | 196 | static s32 expected_tpt_mimo2_40MHz[4][RATE_COUNT] = { |
e7392364 SG |
197 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ |
198 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ | |
199 | {0, 0, 0, 0, 180, 0, 327, 446, 545, 708, 828, 878, 922}, /* AGG */ | |
200 | {0, 0, 0, 0, 197, 0, 355, 481, 584, 752, 872, 922, 966}, /* AGG+SGI */ | |
be663ab6 WYG |
201 | }; |
202 | ||
203 | /* mbps, mcs */ | |
2eb05816 | 204 | static const struct il_rate_mcs_info il_rate_mcs[RATE_COUNT] = { |
e7392364 SG |
205 | {"1", "BPSK DSSS"}, |
206 | {"2", "QPSK DSSS"}, | |
be663ab6 | 207 | {"5.5", "BPSK CCK"}, |
e7392364 SG |
208 | {"11", "QPSK CCK"}, |
209 | {"6", "BPSK 1/2"}, | |
210 | {"9", "BPSK 1/2"}, | |
211 | {"12", "QPSK 1/2"}, | |
212 | {"18", "QPSK 3/4"}, | |
213 | {"24", "16QAM 1/2"}, | |
214 | {"36", "16QAM 3/4"}, | |
215 | {"48", "64QAM 2/3"}, | |
216 | {"54", "64QAM 3/4"}, | |
217 | {"60", "64QAM 5/6"}, | |
be663ab6 WYG |
218 | }; |
219 | ||
2d09b062 | 220 | #define MCS_IDX_PER_STREAM (8) |
be663ab6 | 221 | |
e7392364 SG |
222 | static inline u8 |
223 | il4965_rs_extract_rate(u32 rate_n_flags) | |
be663ab6 | 224 | { |
e7392364 | 225 | return (u8) (rate_n_flags & 0xFF); |
be663ab6 WYG |
226 | } |
227 | ||
228 | static void | |
6ce1dc45 | 229 | il4965_rs_rate_scale_clear_win(struct il_rate_scale_data *win) |
be663ab6 | 230 | { |
6ce1dc45 SG |
231 | win->data = 0; |
232 | win->success_counter = 0; | |
233 | win->success_ratio = IL_INVALID_VALUE; | |
234 | win->counter = 0; | |
235 | win->average_tpt = IL_INVALID_VALUE; | |
236 | win->stamp = 0; | |
be663ab6 WYG |
237 | } |
238 | ||
e7392364 SG |
239 | static inline u8 |
240 | il4965_rs_is_valid_ant(u8 valid_antenna, u8 ant_type) | |
be663ab6 WYG |
241 | { |
242 | return (ant_type & valid_antenna) == ant_type; | |
243 | } | |
244 | ||
245 | /* | |
ebf0d90d | 246 | * removes the old data from the stats. All data that is older than |
be663ab6 WYG |
247 | * TID_MAX_TIME_DIFF, will be deleted. |
248 | */ | |
249 | static void | |
e2ebc833 | 250 | il4965_rs_tl_rm_old_stats(struct il_traffic_load *tl, u32 curr_time) |
be663ab6 WYG |
251 | { |
252 | /* The oldest age we want to keep */ | |
253 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
254 | ||
232913b5 | 255 | while (tl->queue_count && tl->time_stamp < oldest_time) { |
be663ab6 WYG |
256 | tl->total -= tl->packet_count[tl->head]; |
257 | tl->packet_count[tl->head] = 0; | |
258 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
259 | tl->queue_count--; | |
260 | tl->head++; | |
261 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
262 | tl->head = 0; | |
263 | } | |
264 | } | |
265 | ||
266 | /* | |
267 | * increment traffic load value for tid and also remove | |
268 | * any old values if passed the certain time period | |
269 | */ | |
e7392364 SG |
270 | static u8 |
271 | il4965_rs_tl_add_packet(struct il_lq_sta *lq_data, struct ieee80211_hdr *hdr) | |
be663ab6 WYG |
272 | { |
273 | u32 curr_time = jiffies_to_msecs(jiffies); | |
274 | u32 time_diff; | |
0c2c8852 | 275 | s32 idx; |
e2ebc833 | 276 | struct il_traffic_load *tl = NULL; |
be663ab6 WYG |
277 | u8 tid; |
278 | ||
279 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
280 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
281 | tid = qc[0] & 0xf; | |
282 | } else | |
283 | return MAX_TID_COUNT; | |
284 | ||
285 | if (unlikely(tid >= TID_MAX_LOAD_COUNT)) | |
286 | return MAX_TID_COUNT; | |
287 | ||
288 | tl = &lq_data->load[tid]; | |
289 | ||
290 | curr_time -= curr_time % TID_ROUND_VALUE; | |
291 | ||
292 | /* Happens only for the first packet. Initialize the data */ | |
293 | if (!(tl->queue_count)) { | |
294 | tl->total = 1; | |
295 | tl->time_stamp = curr_time; | |
296 | tl->queue_count = 1; | |
297 | tl->head = 0; | |
298 | tl->packet_count[0] = 1; | |
299 | return MAX_TID_COUNT; | |
300 | } | |
301 | ||
302 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
0c2c8852 | 303 | idx = time_diff / TID_QUEUE_CELL_SPACING; |
be663ab6 WYG |
304 | |
305 | /* The history is too long: remove data that is older than */ | |
306 | /* TID_MAX_TIME_DIFF */ | |
0c2c8852 | 307 | if (idx >= TID_QUEUE_MAX_SIZE) |
e2ebc833 | 308 | il4965_rs_tl_rm_old_stats(tl, curr_time); |
be663ab6 | 309 | |
0c2c8852 SG |
310 | idx = (tl->head + idx) % TID_QUEUE_MAX_SIZE; |
311 | tl->packet_count[idx] = tl->packet_count[idx] + 1; | |
be663ab6 WYG |
312 | tl->total = tl->total + 1; |
313 | ||
0c2c8852 SG |
314 | if ((idx + 1) > tl->queue_count) |
315 | tl->queue_count = idx + 1; | |
be663ab6 WYG |
316 | |
317 | return tid; | |
318 | } | |
319 | ||
320 | /* | |
321 | get the traffic load value for tid | |
322 | */ | |
e7392364 SG |
323 | static u32 |
324 | il4965_rs_tl_get_load(struct il_lq_sta *lq_data, u8 tid) | |
be663ab6 WYG |
325 | { |
326 | u32 curr_time = jiffies_to_msecs(jiffies); | |
327 | u32 time_diff; | |
0c2c8852 | 328 | s32 idx; |
e2ebc833 | 329 | struct il_traffic_load *tl = NULL; |
be663ab6 WYG |
330 | |
331 | if (tid >= TID_MAX_LOAD_COUNT) | |
332 | return 0; | |
333 | ||
334 | tl = &(lq_data->load[tid]); | |
335 | ||
336 | curr_time -= curr_time % TID_ROUND_VALUE; | |
337 | ||
338 | if (!(tl->queue_count)) | |
339 | return 0; | |
340 | ||
341 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
0c2c8852 | 342 | idx = time_diff / TID_QUEUE_CELL_SPACING; |
be663ab6 WYG |
343 | |
344 | /* The history is too long: remove data that is older than */ | |
345 | /* TID_MAX_TIME_DIFF */ | |
0c2c8852 | 346 | if (idx >= TID_QUEUE_MAX_SIZE) |
e2ebc833 | 347 | il4965_rs_tl_rm_old_stats(tl, curr_time); |
be663ab6 WYG |
348 | |
349 | return tl->total; | |
350 | } | |
351 | ||
e7392364 SG |
352 | static int |
353 | il4965_rs_tl_turn_on_agg_for_tid(struct il_priv *il, struct il_lq_sta *lq_data, | |
354 | u8 tid, struct ieee80211_sta *sta) | |
be663ab6 WYG |
355 | { |
356 | int ret = -EAGAIN; | |
357 | u32 load; | |
358 | ||
e2ebc833 | 359 | load = il4965_rs_tl_get_load(lq_data, tid); |
be663ab6 | 360 | |
e2ebc833 | 361 | if (load > IL_AGG_LOAD_THRESHOLD) { |
e7392364 | 362 | D_HT("Starting Tx agg: STA: %pM tid: %d\n", sta->addr, tid); |
be663ab6 WYG |
363 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); |
364 | if (ret == -EAGAIN) { | |
365 | /* | |
366 | * driver and mac80211 is out of sync | |
367 | * this might be cause by reloading firmware | |
368 | * stop the tx ba session here | |
369 | */ | |
e7392364 | 370 | IL_ERR("Fail start Tx agg on tid: %d\n", tid); |
be663ab6 WYG |
371 | ieee80211_stop_tx_ba_session(sta, tid); |
372 | } | |
dd44eb9e GD |
373 | } else |
374 | D_HT("Aggregation not enabled for tid %d because load = %u\n", | |
375 | tid, load); | |
376 | ||
be663ab6 WYG |
377 | return ret; |
378 | } | |
379 | ||
e7392364 SG |
380 | static void |
381 | il4965_rs_tl_turn_on_agg(struct il_priv *il, u8 tid, struct il_lq_sta *lq_data, | |
382 | struct ieee80211_sta *sta) | |
be663ab6 WYG |
383 | { |
384 | if (tid < TID_MAX_LOAD_COUNT) | |
46bc8d4b | 385 | il4965_rs_tl_turn_on_agg_for_tid(il, lq_data, tid, sta); |
be663ab6 | 386 | else |
e7392364 SG |
387 | IL_ERR("tid exceeds max load count: %d/%d\n", tid, |
388 | TID_MAX_LOAD_COUNT); | |
be663ab6 WYG |
389 | } |
390 | ||
e7392364 SG |
391 | static inline int |
392 | il4965_get_il4965_num_of_ant_from_rate(u32 rate_n_flags) | |
be663ab6 WYG |
393 | { |
394 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
e7392364 SG |
395 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + |
396 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
be663ab6 WYG |
397 | } |
398 | ||
399 | /* | |
e2ebc833 | 400 | * Static function to get the expected throughput from an il_scale_tbl_info |
be663ab6 WYG |
401 | * that wraps a NULL pointer check |
402 | */ | |
403 | static s32 | |
0c2c8852 | 404 | il4965_get_expected_tpt(struct il_scale_tbl_info *tbl, int rs_idx) |
be663ab6 WYG |
405 | { |
406 | if (tbl->expected_tpt) | |
0c2c8852 | 407 | return tbl->expected_tpt[rs_idx]; |
be663ab6 WYG |
408 | return 0; |
409 | } | |
410 | ||
411 | /** | |
6ce1dc45 | 412 | * il4965_rs_collect_tx_data - Update the success/failure sliding win |
be663ab6 | 413 | * |
6ce1dc45 SG |
414 | * We keep a sliding win of the last 62 packets transmitted |
415 | * at this rate. win->data contains the bitmask of successful | |
be663ab6 WYG |
416 | * packets. |
417 | */ | |
e7392364 SG |
418 | static int |
419 | il4965_rs_collect_tx_data(struct il_scale_tbl_info *tbl, int scale_idx, | |
420 | int attempts, int successes) | |
be663ab6 | 421 | { |
6ce1dc45 | 422 | struct il_rate_scale_data *win = NULL; |
e7392364 | 423 | static const u64 mask = (((u64) 1) << (RATE_MAX_WINDOW - 1)); |
be663ab6 WYG |
424 | s32 fail_count, tpt; |
425 | ||
0c2c8852 | 426 | if (scale_idx < 0 || scale_idx >= RATE_COUNT) |
be663ab6 WYG |
427 | return -EINVAL; |
428 | ||
6ce1dc45 | 429 | /* Select win for current tx bit rate */ |
0c2c8852 | 430 | win = &(tbl->win[scale_idx]); |
be663ab6 WYG |
431 | |
432 | /* Get expected throughput */ | |
0c2c8852 | 433 | tpt = il4965_get_expected_tpt(tbl, scale_idx); |
be663ab6 WYG |
434 | |
435 | /* | |
436 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
6ce1dc45 SG |
437 | * history win; anything older isn't really relevant any more. |
438 | * If we have filled up the sliding win, drop the oldest attempt; | |
be663ab6 WYG |
439 | * if the oldest attempt (highest bit in bitmap) shows "success", |
440 | * subtract "1" from the success counter (this is the main reason | |
441 | * we keep these bitmaps!). | |
442 | */ | |
443 | while (attempts > 0) { | |
2eb05816 | 444 | if (win->counter >= RATE_MAX_WINDOW) { |
be663ab6 WYG |
445 | |
446 | /* remove earliest */ | |
2eb05816 | 447 | win->counter = RATE_MAX_WINDOW - 1; |
be663ab6 | 448 | |
6ce1dc45 SG |
449 | if (win->data & mask) { |
450 | win->data &= ~mask; | |
451 | win->success_counter--; | |
be663ab6 WYG |
452 | } |
453 | } | |
454 | ||
455 | /* Increment frames-attempted counter */ | |
6ce1dc45 | 456 | win->counter++; |
be663ab6 WYG |
457 | |
458 | /* Shift bitmap by one frame to throw away oldest history */ | |
6ce1dc45 | 459 | win->data <<= 1; |
be663ab6 WYG |
460 | |
461 | /* Mark the most recent #successes attempts as successful */ | |
462 | if (successes > 0) { | |
6ce1dc45 SG |
463 | win->success_counter++; |
464 | win->data |= 0x1; | |
be663ab6 WYG |
465 | successes--; |
466 | } | |
467 | ||
468 | attempts--; | |
469 | } | |
470 | ||
471 | /* Calculate current success ratio, avoid divide-by-0! */ | |
6ce1dc45 | 472 | if (win->counter > 0) |
e7392364 SG |
473 | win->success_ratio = |
474 | 128 * (100 * win->success_counter) / win->counter; | |
be663ab6 | 475 | else |
6ce1dc45 | 476 | win->success_ratio = IL_INVALID_VALUE; |
be663ab6 | 477 | |
6ce1dc45 | 478 | fail_count = win->counter - win->success_counter; |
be663ab6 WYG |
479 | |
480 | /* Calculate average throughput, if we have enough history. */ | |
2eb05816 SG |
481 | if (fail_count >= RATE_MIN_FAILURE_TH || |
482 | win->success_counter >= RATE_MIN_SUCCESS_TH) | |
6ce1dc45 | 483 | win->average_tpt = (win->success_ratio * tpt + 64) / 128; |
be663ab6 | 484 | else |
6ce1dc45 | 485 | win->average_tpt = IL_INVALID_VALUE; |
be663ab6 | 486 | |
6ce1dc45 SG |
487 | /* Tag this win as having been updated */ |
488 | win->stamp = jiffies; | |
be663ab6 WYG |
489 | |
490 | return 0; | |
491 | } | |
492 | ||
493 | /* | |
494 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
495 | */ | |
e7392364 SG |
496 | static u32 |
497 | il4965_rate_n_flags_from_tbl(struct il_priv *il, struct il_scale_tbl_info *tbl, | |
498 | int idx, u8 use_green) | |
be663ab6 WYG |
499 | { |
500 | u32 rate_n_flags = 0; | |
501 | ||
502 | if (is_legacy(tbl->lq_type)) { | |
0c2c8852 SG |
503 | rate_n_flags = il_rates[idx].plcp; |
504 | if (idx >= IL_FIRST_CCK_RATE && idx <= IL_LAST_CCK_RATE) | |
be663ab6 WYG |
505 | rate_n_flags |= RATE_MCS_CCK_MSK; |
506 | ||
507 | } else if (is_Ht(tbl->lq_type)) { | |
0c2c8852 SG |
508 | if (idx > IL_LAST_OFDM_RATE) { |
509 | IL_ERR("Invalid HT rate idx %d\n", idx); | |
510 | idx = IL_LAST_OFDM_RATE; | |
be663ab6 WYG |
511 | } |
512 | rate_n_flags = RATE_MCS_HT_MSK; | |
513 | ||
514 | if (is_siso(tbl->lq_type)) | |
e7392364 | 515 | rate_n_flags |= il_rates[idx].plcp_siso; |
be663ab6 | 516 | else |
e7392364 | 517 | rate_n_flags |= il_rates[idx].plcp_mimo2; |
be663ab6 | 518 | } else { |
9406f797 | 519 | IL_ERR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
be663ab6 WYG |
520 | } |
521 | ||
e7392364 SG |
522 | rate_n_flags |= |
523 | ((tbl->ant_type << RATE_MCS_ANT_POS) & RATE_MCS_ANT_ABC_MSK); | |
be663ab6 WYG |
524 | |
525 | if (is_Ht(tbl->lq_type)) { | |
526 | if (tbl->is_ht40) { | |
527 | if (tbl->is_dup) | |
528 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
529 | else | |
530 | rate_n_flags |= RATE_MCS_HT40_MSK; | |
531 | } | |
532 | if (tbl->is_SGI) | |
533 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
534 | ||
535 | if (use_green) { | |
536 | rate_n_flags |= RATE_MCS_GF_MSK; | |
537 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
538 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
9406f797 | 539 | IL_ERR("GF was set with SGI:SISO\n"); |
be663ab6 WYG |
540 | } |
541 | } | |
542 | } | |
543 | return rate_n_flags; | |
544 | } | |
545 | ||
546 | /* | |
547 | * Interpret uCode API's rate_n_flags format, | |
548 | * fill "search" or "active" tx mode table. | |
549 | */ | |
e7392364 SG |
550 | static int |
551 | il4965_rs_get_tbl_info_from_mcs(const u32 rate_n_flags, | |
552 | enum ieee80211_band band, | |
553 | struct il_scale_tbl_info *tbl, int *rate_idx) | |
be663ab6 WYG |
554 | { |
555 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); | |
e7392364 SG |
556 | u8 il4965_num_of_ant = |
557 | il4965_get_il4965_num_of_ant_from_rate(rate_n_flags); | |
be663ab6 WYG |
558 | u8 mcs; |
559 | ||
e2ebc833 SG |
560 | memset(tbl, 0, sizeof(struct il_scale_tbl_info)); |
561 | *rate_idx = il4965_hwrate_to_plcp_idx(rate_n_flags); | |
be663ab6 | 562 | |
e7392364 | 563 | if (*rate_idx == RATE_INVALID) { |
be663ab6 WYG |
564 | *rate_idx = -1; |
565 | return -EINVAL; | |
566 | } | |
567 | tbl->is_SGI = 0; /* default legacy setup */ | |
568 | tbl->is_ht40 = 0; | |
569 | tbl->is_dup = 0; | |
570 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); | |
571 | tbl->lq_type = LQ_NONE; | |
e2ebc833 | 572 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
573 | |
574 | /* legacy rate format */ | |
575 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { | |
e2ebc833 | 576 | if (il4965_num_of_ant == 1) { |
be663ab6 WYG |
577 | if (band == IEEE80211_BAND_5GHZ) |
578 | tbl->lq_type = LQ_A; | |
579 | else | |
580 | tbl->lq_type = LQ_G; | |
581 | } | |
e7392364 | 582 | /* HT rate format */ |
be663ab6 WYG |
583 | } else { |
584 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
585 | tbl->is_SGI = 1; | |
586 | ||
587 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || | |
588 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
589 | tbl->is_ht40 = 1; | |
590 | ||
591 | if (rate_n_flags & RATE_MCS_DUP_MSK) | |
592 | tbl->is_dup = 1; | |
593 | ||
e2ebc833 | 594 | mcs = il4965_rs_extract_rate(rate_n_flags); |
be663ab6 WYG |
595 | |
596 | /* SISO */ | |
2eb05816 | 597 | if (mcs <= RATE_SISO_60M_PLCP) { |
e2ebc833 | 598 | if (il4965_num_of_ant == 1) |
e7392364 SG |
599 | tbl->lq_type = LQ_SISO; /*else NONE */ |
600 | /* MIMO2 */ | |
be663ab6 | 601 | } else { |
e2ebc833 | 602 | if (il4965_num_of_ant == 2) |
be663ab6 WYG |
603 | tbl->lq_type = LQ_MIMO2; |
604 | } | |
605 | } | |
606 | return 0; | |
607 | } | |
608 | ||
609 | /* switch to another antenna/antennas and return 1 */ | |
610 | /* if no other valid antenna found, return 0 */ | |
e7392364 | 611 | static int |
1722f8e1 | 612 | il4965_rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, |
e7392364 | 613 | struct il_scale_tbl_info *tbl) |
be663ab6 WYG |
614 | { |
615 | u8 new_ant_type; | |
616 | ||
617 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
618 | return 0; | |
619 | ||
e2ebc833 | 620 | if (!il4965_rs_is_valid_ant(valid_ant, tbl->ant_type)) |
be663ab6 WYG |
621 | return 0; |
622 | ||
623 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
624 | ||
232913b5 | 625 | while (new_ant_type != tbl->ant_type && |
e2ebc833 | 626 | !il4965_rs_is_valid_ant(valid_ant, new_ant_type)) |
be663ab6 WYG |
627 | new_ant_type = ant_toggle_lookup[new_ant_type]; |
628 | ||
629 | if (new_ant_type == tbl->ant_type) | |
630 | return 0; | |
631 | ||
632 | tbl->ant_type = new_ant_type; | |
633 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
634 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
635 | return 1; | |
636 | } | |
637 | ||
638 | /** | |
639 | * Green-field mode is valid if the station supports it and | |
640 | * there are no non-GF stations present in the BSS. | |
641 | */ | |
e7392364 | 642 | static bool |
1c03c462 | 643 | il4965_rs_use_green(struct il_priv *il, struct ieee80211_sta *sta) |
be663ab6 | 644 | { |
be663ab6 | 645 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
1c03c462 | 646 | !il->ht.non_gf_sta_present; |
be663ab6 WYG |
647 | } |
648 | ||
649 | /** | |
e2ebc833 | 650 | * il4965_rs_get_supported_rates - get the available rates |
be663ab6 WYG |
651 | * |
652 | * if management frame or broadcast frame only return | |
653 | * basic available rates. | |
654 | * | |
655 | */ | |
e7392364 SG |
656 | static u16 |
657 | il4965_rs_get_supported_rates(struct il_lq_sta *lq_sta, | |
658 | struct ieee80211_hdr *hdr, | |
659 | enum il_table_type rate_type) | |
be663ab6 WYG |
660 | { |
661 | if (is_legacy(rate_type)) { | |
662 | return lq_sta->active_legacy_rate; | |
663 | } else { | |
664 | if (is_siso(rate_type)) | |
665 | return lq_sta->active_siso_rate; | |
666 | else | |
667 | return lq_sta->active_mimo2_rate; | |
668 | } | |
669 | } | |
670 | ||
671 | static u16 | |
0c2c8852 | 672 | il4965_rs_get_adjacent_rate(struct il_priv *il, u8 idx, u16 rate_mask, |
e7392364 | 673 | int rate_type) |
be663ab6 | 674 | { |
2eb05816 SG |
675 | u8 high = RATE_INVALID; |
676 | u8 low = RATE_INVALID; | |
be663ab6 WYG |
677 | |
678 | /* 802.11A or ht walks to the next literal adjacent rate in | |
679 | * the rate table */ | |
680 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
681 | int i; | |
682 | u32 mask; | |
683 | ||
684 | /* Find the previous rate that is in the rate mask */ | |
0c2c8852 | 685 | i = idx - 1; |
be663ab6 WYG |
686 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { |
687 | if (rate_mask & mask) { | |
688 | low = i; | |
689 | break; | |
690 | } | |
691 | } | |
692 | ||
693 | /* Find the next rate that is in the rate mask */ | |
0c2c8852 | 694 | i = idx + 1; |
2eb05816 | 695 | for (mask = (1 << i); i < RATE_COUNT; i++, mask <<= 1) { |
be663ab6 WYG |
696 | if (rate_mask & mask) { |
697 | high = i; | |
698 | break; | |
699 | } | |
700 | } | |
701 | ||
702 | return (high << 8) | low; | |
703 | } | |
704 | ||
0c2c8852 | 705 | low = idx; |
2eb05816 | 706 | while (low != RATE_INVALID) { |
d2ddf621 | 707 | low = il_rates[low].prev_rs; |
2eb05816 | 708 | if (low == RATE_INVALID) |
be663ab6 WYG |
709 | break; |
710 | if (rate_mask & (1 << low)) | |
711 | break; | |
58de00a4 | 712 | D_RATE("Skipping masked lower rate: %d\n", low); |
be663ab6 WYG |
713 | } |
714 | ||
0c2c8852 | 715 | high = idx; |
2eb05816 | 716 | while (high != RATE_INVALID) { |
d2ddf621 | 717 | high = il_rates[high].next_rs; |
2eb05816 | 718 | if (high == RATE_INVALID) |
be663ab6 WYG |
719 | break; |
720 | if (rate_mask & (1 << high)) | |
721 | break; | |
58de00a4 | 722 | D_RATE("Skipping masked higher rate: %d\n", high); |
be663ab6 WYG |
723 | } |
724 | ||
725 | return (high << 8) | low; | |
726 | } | |
727 | ||
e7392364 SG |
728 | static u32 |
729 | il4965_rs_get_lower_rate(struct il_lq_sta *lq_sta, | |
730 | struct il_scale_tbl_info *tbl, u8 scale_idx, | |
731 | u8 ht_possible) | |
be663ab6 WYG |
732 | { |
733 | s32 low; | |
734 | u16 rate_mask; | |
735 | u16 high_low; | |
736 | u8 switch_to_legacy = 0; | |
737 | u8 is_green = lq_sta->is_green; | |
46bc8d4b | 738 | struct il_priv *il = lq_sta->drv; |
be663ab6 WYG |
739 | |
740 | /* check if we need to switch from HT to legacy rates. | |
741 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
742 | * are always supported (spec demand) */ | |
0c2c8852 | 743 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_idx)) { |
be663ab6 | 744 | switch_to_legacy = 1; |
0c2c8852 | 745 | scale_idx = rs_ht_to_legacy[scale_idx]; |
be663ab6 WYG |
746 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
747 | tbl->lq_type = LQ_A; | |
748 | else | |
749 | tbl->lq_type = LQ_G; | |
750 | ||
e2ebc833 | 751 | if (il4965_num_of_ant(tbl->ant_type) > 1) |
be663ab6 | 752 | tbl->ant_type = |
e7392364 | 753 | il4965_first_antenna(il->hw_params.valid_tx_ant); |
be663ab6 WYG |
754 | |
755 | tbl->is_ht40 = 0; | |
756 | tbl->is_SGI = 0; | |
e2ebc833 | 757 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
758 | } |
759 | ||
e2ebc833 | 760 | rate_mask = il4965_rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
be663ab6 WYG |
761 | |
762 | /* Mask with station rate restriction */ | |
763 | if (is_legacy(tbl->lq_type)) { | |
764 | /* supp_rates has no CCK bits in A mode */ | |
765 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
e7392364 SG |
766 | rate_mask = |
767 | (u16) (rate_mask & | |
768 | (lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); | |
be663ab6 | 769 | else |
e7392364 | 770 | rate_mask = (u16) (rate_mask & lq_sta->supp_rates); |
be663ab6 WYG |
771 | } |
772 | ||
773 | /* If we switched from HT to legacy, check current rate */ | |
0c2c8852 SG |
774 | if (switch_to_legacy && (rate_mask & (1 << scale_idx))) { |
775 | low = scale_idx; | |
be663ab6 WYG |
776 | goto out; |
777 | } | |
778 | ||
e7392364 SG |
779 | high_low = |
780 | il4965_rs_get_adjacent_rate(lq_sta->drv, scale_idx, rate_mask, | |
be663ab6 WYG |
781 | tbl->lq_type); |
782 | low = high_low & 0xff; | |
783 | ||
2eb05816 | 784 | if (low == RATE_INVALID) |
0c2c8852 | 785 | low = scale_idx; |
be663ab6 WYG |
786 | |
787 | out: | |
e2ebc833 | 788 | return il4965_rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
be663ab6 WYG |
789 | } |
790 | ||
791 | /* | |
792 | * Simple function to compare two rate scale table types | |
793 | */ | |
e7392364 SG |
794 | static bool |
795 | il4965_table_type_matches(struct il_scale_tbl_info *a, | |
796 | struct il_scale_tbl_info *b) | |
be663ab6 | 797 | { |
232913b5 SG |
798 | return (a->lq_type == b->lq_type && a->ant_type == b->ant_type && |
799 | a->is_SGI == b->is_SGI); | |
be663ab6 WYG |
800 | } |
801 | ||
802 | /* | |
803 | * mac80211 sends us Tx status | |
804 | */ | |
805 | static void | |
46bc8d4b | 806 | il4965_rs_tx_status(void *il_r, struct ieee80211_supported_band *sband, |
e7392364 SG |
807 | struct ieee80211_sta *sta, void *il_sta, |
808 | struct sk_buff *skb) | |
be663ab6 WYG |
809 | { |
810 | int legacy_success; | |
811 | int retries; | |
0c2c8852 | 812 | int rs_idx, mac_idx, i; |
46bc8d4b | 813 | struct il_lq_sta *lq_sta = il_sta; |
e2ebc833 | 814 | struct il_link_quality_cmd *table; |
be663ab6 | 815 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
46bc8d4b | 816 | struct il_priv *il = (struct il_priv *)il_r; |
be663ab6 WYG |
817 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
818 | enum mac80211_rate_control_flags mac_flags; | |
819 | u32 tx_rate; | |
e2ebc833 SG |
820 | struct il_scale_tbl_info tbl_type; |
821 | struct il_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; | |
be663ab6 | 822 | |
e7392364 | 823 | D_RATE("get frame ack response, update rate scale win\n"); |
be663ab6 WYG |
824 | |
825 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
826 | if (!lq_sta) { | |
58de00a4 | 827 | D_RATE("Station rate scaling not created yet.\n"); |
be663ab6 WYG |
828 | return; |
829 | } else if (!lq_sta->drv) { | |
58de00a4 | 830 | D_RATE("Rate scaling not initialized yet.\n"); |
be663ab6 WYG |
831 | return; |
832 | } | |
833 | ||
834 | if (!ieee80211_is_data(hdr->frame_control) || | |
232913b5 | 835 | (info->flags & IEEE80211_TX_CTL_NO_ACK)) |
be663ab6 WYG |
836 | return; |
837 | ||
838 | /* This packet was aggregated but doesn't carry status info */ | |
839 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
840 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
841 | return; | |
842 | ||
843 | /* | |
844 | * Ignore this Tx frame response if its initial rate doesn't match | |
845 | * that of latest Link Quality command. There may be stragglers | |
846 | * from a previous Link Quality command, but we're no longer interested | |
847 | * in those; they're either from the "active" mode while we're trying | |
848 | * to check "search" mode, or a prior "search" mode after we've moved | |
849 | * to a new "search" mode (which might become the new "active" mode). | |
850 | */ | |
851 | table = &lq_sta->lq; | |
852 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
e7392364 | 853 | il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type, &rs_idx); |
46bc8d4b | 854 | if (il->band == IEEE80211_BAND_5GHZ) |
0c2c8852 | 855 | rs_idx -= IL_FIRST_OFDM_RATE; |
be663ab6 | 856 | mac_flags = info->status.rates[0].flags; |
0c2c8852 | 857 | mac_idx = info->status.rates[0].idx; |
be663ab6 WYG |
858 | /* For HT packets, map MCS to PLCP */ |
859 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
0c2c8852 SG |
860 | mac_idx &= RATE_MCS_CODE_MSK; /* Remove # of streams */ |
861 | if (mac_idx >= (RATE_9M_IDX - IL_FIRST_OFDM_RATE)) | |
862 | mac_idx++; | |
be663ab6 | 863 | /* |
0c2c8852 | 864 | * mac80211 HT idx is always zero-idxed; we need to move |
be663ab6 WYG |
865 | * HT OFDM rates after CCK rates in 2.4 GHz band |
866 | */ | |
46bc8d4b | 867 | if (il->band == IEEE80211_BAND_2GHZ) |
0c2c8852 | 868 | mac_idx += IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
869 | } |
870 | /* Here we actually compare this rate to the latest LQ command */ | |
0c2c8852 | 871 | if (mac_idx < 0 || |
232913b5 SG |
872 | tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI) || |
873 | tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH) || | |
874 | tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA) || | |
d748b464 | 875 | tbl_type.ant_type != info->status.antenna || |
e7392364 SG |
876 | !!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS) |
877 | || !!(tx_rate & RATE_MCS_GF_MSK) != | |
878 | !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD) || rs_idx != mac_idx) { | |
879 | D_RATE("initial rate %d does not match %d (0x%x)\n", mac_idx, | |
880 | rs_idx, tx_rate); | |
be663ab6 WYG |
881 | /* |
882 | * Since rates mis-match, the last LQ command may have failed. | |
e2ebc833 | 883 | * After IL_MISSED_RATE_MAX mis-matches, resync the uCode with |
be663ab6 WYG |
884 | * ... driver. |
885 | */ | |
886 | lq_sta->missed_rate_counter++; | |
e2ebc833 | 887 | if (lq_sta->missed_rate_counter > IL_MISSED_RATE_MAX) { |
be663ab6 | 888 | lq_sta->missed_rate_counter = 0; |
83007196 | 889 | il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false); |
be663ab6 WYG |
890 | } |
891 | /* Regardless, ignore this status info for outdated rate */ | |
892 | return; | |
893 | } else | |
894 | /* Rate did match, so reset the missed_rate_counter */ | |
895 | lq_sta->missed_rate_counter = 0; | |
896 | ||
897 | /* Figure out if rate scale algorithm is in active or search table */ | |
e7392364 SG |
898 | if (il4965_table_type_matches |
899 | (&tbl_type, &(lq_sta->lq_info[lq_sta->active_tbl]))) { | |
be663ab6 WYG |
900 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
901 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
e7392364 SG |
902 | } else |
903 | if (il4965_table_type_matches | |
904 | (&tbl_type, &lq_sta->lq_info[1 - lq_sta->active_tbl])) { | |
be663ab6 WYG |
905 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
906 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
907 | } else { | |
e7392364 | 908 | D_RATE("Neither active nor search matches tx rate\n"); |
be663ab6 | 909 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
e7392364 SG |
910 | D_RATE("active- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type, |
911 | tmp_tbl->ant_type, tmp_tbl->is_SGI); | |
be663ab6 | 912 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
e7392364 SG |
913 | D_RATE("search- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type, |
914 | tmp_tbl->ant_type, tmp_tbl->is_SGI); | |
915 | D_RATE("actual- lq:%x, ant:%x, SGI:%d\n", tbl_type.lq_type, | |
916 | tbl_type.ant_type, tbl_type.is_SGI); | |
be663ab6 WYG |
917 | /* |
918 | * no matching table found, let's by-pass the data collection | |
919 | * and continue to perform rate scale to find the rate table | |
920 | */ | |
e2ebc833 | 921 | il4965_rs_stay_in_table(lq_sta, true); |
be663ab6 WYG |
922 | goto done; |
923 | } | |
924 | ||
925 | /* | |
926 | * Updating the frame history depends on whether packets were | |
927 | * aggregated. | |
928 | * | |
929 | * For aggregation, all packets were transmitted at the same rate, the | |
0c2c8852 | 930 | * first idx into rate scale table. |
be663ab6 WYG |
931 | */ |
932 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
933 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
46bc8d4b | 934 | il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type, |
e7392364 | 935 | &rs_idx); |
0c2c8852 | 936 | il4965_rs_collect_tx_data(curr_tbl, rs_idx, |
e7392364 SG |
937 | info->status.ampdu_len, |
938 | info->status.ampdu_ack_len); | |
be663ab6 WYG |
939 | |
940 | /* Update success/fail counts if not searching for new mode */ | |
941 | if (lq_sta->stay_in_tbl) { | |
942 | lq_sta->total_success += info->status.ampdu_ack_len; | |
e7392364 SG |
943 | lq_sta->total_failed += |
944 | (info->status.ampdu_len - | |
945 | info->status.ampdu_ack_len); | |
be663ab6 WYG |
946 | } |
947 | } else { | |
e7392364 SG |
948 | /* |
949 | * For legacy, update frame history with for each Tx retry. | |
950 | */ | |
be663ab6 WYG |
951 | retries = info->status.rates[0].count - 1; |
952 | /* HW doesn't send more than 15 retries */ | |
953 | retries = min(retries, 15); | |
954 | ||
955 | /* The last transmission may have been successful */ | |
956 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
957 | /* Collect data for each rate used during failed TX attempts */ | |
958 | for (i = 0; i <= retries; ++i) { | |
959 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
46bc8d4b | 960 | il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, |
e7392364 | 961 | &tbl_type, &rs_idx); |
be663ab6 WYG |
962 | /* |
963 | * Only collect stats if retried rate is in the same RS | |
964 | * table as active/search. | |
965 | */ | |
e2ebc833 | 966 | if (il4965_table_type_matches(&tbl_type, curr_tbl)) |
be663ab6 | 967 | tmp_tbl = curr_tbl; |
e7392364 SG |
968 | else if (il4965_table_type_matches |
969 | (&tbl_type, other_tbl)) | |
be663ab6 WYG |
970 | tmp_tbl = other_tbl; |
971 | else | |
972 | continue; | |
0c2c8852 | 973 | il4965_rs_collect_tx_data(tmp_tbl, rs_idx, 1, |
e7392364 SG |
974 | i < |
975 | retries ? 0 : legacy_success); | |
be663ab6 WYG |
976 | } |
977 | ||
978 | /* Update success/fail counts if not searching for new mode */ | |
979 | if (lq_sta->stay_in_tbl) { | |
980 | lq_sta->total_success += legacy_success; | |
981 | lq_sta->total_failed += retries + (1 - legacy_success); | |
982 | } | |
983 | } | |
984 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
985 | lq_sta->last_rate_n_flags = tx_rate; | |
986 | done: | |
987 | /* See if there's a better rate or modulation mode to try. */ | |
da6134d2 | 988 | if (sta->supp_rates[sband->band]) |
46bc8d4b | 989 | il4965_rs_rate_scale_perform(il, skb, sta, lq_sta); |
be663ab6 WYG |
990 | } |
991 | ||
992 | /* | |
993 | * Begin a period of staying with a selected modulation mode. | |
994 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
995 | * Set frame tx success limits according to legacy vs. high-throughput, | |
ebf0d90d | 996 | * and reset overall (spanning all rates) tx success history stats. |
be663ab6 WYG |
997 | * These control how long we stay using same modulation mode before |
998 | * searching for a new mode. | |
999 | */ | |
e7392364 SG |
1000 | static void |
1001 | il4965_rs_set_stay_in_table(struct il_priv *il, u8 is_legacy, | |
1002 | struct il_lq_sta *lq_sta) | |
be663ab6 | 1003 | { |
58de00a4 | 1004 | D_RATE("we are staying in the same table\n"); |
be663ab6 WYG |
1005 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
1006 | if (is_legacy) { | |
3b98c7f4 | 1007 | lq_sta->table_count_limit = IL_LEGACY_TBL_COUNT; |
e2ebc833 SG |
1008 | lq_sta->max_failure_limit = IL_LEGACY_FAILURE_LIMIT; |
1009 | lq_sta->max_success_limit = IL_LEGACY_SUCCESS_LIMIT; | |
be663ab6 | 1010 | } else { |
3b98c7f4 | 1011 | lq_sta->table_count_limit = IL_NONE_LEGACY_TBL_COUNT; |
e2ebc833 SG |
1012 | lq_sta->max_failure_limit = IL_NONE_LEGACY_FAILURE_LIMIT; |
1013 | lq_sta->max_success_limit = IL_NONE_LEGACY_SUCCESS_LIMIT; | |
be663ab6 WYG |
1014 | } |
1015 | lq_sta->table_count = 0; | |
1016 | lq_sta->total_failed = 0; | |
1017 | lq_sta->total_success = 0; | |
1018 | lq_sta->flush_timer = jiffies; | |
1019 | lq_sta->action_counter = 0; | |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * Find correct throughput table for given mode of modulation | |
1024 | */ | |
e7392364 SG |
1025 | static void |
1026 | il4965_rs_set_expected_tpt_table(struct il_lq_sta *lq_sta, | |
1027 | struct il_scale_tbl_info *tbl) | |
be663ab6 WYG |
1028 | { |
1029 | /* Used to choose among HT tables */ | |
e7392364 | 1030 | s32(*ht_tbl_pointer)[RATE_COUNT]; |
be663ab6 WYG |
1031 | |
1032 | /* Check for invalid LQ type */ | |
1033 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
1034 | tbl->expected_tpt = expected_tpt_legacy; | |
1035 | return; | |
1036 | } | |
1037 | ||
1038 | /* Legacy rates have only one table */ | |
1039 | if (is_legacy(tbl->lq_type)) { | |
1040 | tbl->expected_tpt = expected_tpt_legacy; | |
1041 | return; | |
1042 | } | |
1043 | ||
1044 | /* Choose among many HT tables depending on number of streams | |
1045 | * (SISO/MIMO2), channel width (20/40), SGI, and aggregation | |
1046 | * status */ | |
1047 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1048 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
1049 | else if (is_siso(tbl->lq_type)) | |
1050 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
1051 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1052 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
e7392364 | 1053 | else /* if (is_mimo2(tbl->lq_type)) <-- must be true */ |
be663ab6 WYG |
1054 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; |
1055 | ||
e7392364 | 1056 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ |
be663ab6 WYG |
1057 | tbl->expected_tpt = ht_tbl_pointer[0]; |
1058 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
1059 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
1060 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
1061 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
e7392364 | 1062 | else /* AGG+SGI */ |
be663ab6 WYG |
1063 | tbl->expected_tpt = ht_tbl_pointer[3]; |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1068 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1069 | * above the current measured throughput of "active" mode, to give new mode | |
1070 | * a fair chance to prove itself without too many challenges. | |
1071 | * | |
1072 | * This gets called when transitioning to more aggressive modulation | |
1073 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1074 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1075 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1076 | * bit rate will typically need to increase, but not if performance was bad. | |
1077 | */ | |
e7392364 | 1078 | static s32 |
1722f8e1 SG |
1079 | il4965_rs_get_best_rate(struct il_priv *il, struct il_lq_sta *lq_sta, |
1080 | struct il_scale_tbl_info *tbl, /* "search" */ | |
e7392364 | 1081 | u16 rate_mask, s8 idx) |
be663ab6 WYG |
1082 | { |
1083 | /* "active" values */ | |
e2ebc833 | 1084 | struct il_scale_tbl_info *active_tbl = |
be663ab6 | 1085 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
0c2c8852 SG |
1086 | s32 active_sr = active_tbl->win[idx].success_ratio; |
1087 | s32 active_tpt = active_tbl->expected_tpt[idx]; | |
be663ab6 WYG |
1088 | |
1089 | /* expected "search" throughput */ | |
1090 | s32 *tpt_tbl = tbl->expected_tpt; | |
1091 | ||
1092 | s32 new_rate, high, low, start_hi; | |
1093 | u16 high_low; | |
0c2c8852 | 1094 | s8 rate = idx; |
be663ab6 | 1095 | |
2eb05816 | 1096 | new_rate = high = low = start_hi = RATE_INVALID; |
be663ab6 | 1097 | |
e7392364 SG |
1098 | for (;;) { |
1099 | high_low = | |
1100 | il4965_rs_get_adjacent_rate(il, rate, rate_mask, | |
be663ab6 WYG |
1101 | tbl->lq_type); |
1102 | ||
1103 | low = high_low & 0xff; | |
1104 | high = (high_low >> 8) & 0xff; | |
1105 | ||
1106 | /* | |
1107 | * Lower the "search" bit rate, to give new "search" mode | |
1108 | * approximately the same throughput as "active" if: | |
1109 | * | |
1110 | * 1) "Active" mode has been working modestly well (but not | |
1111 | * great), and expected "search" throughput (under perfect | |
1112 | * conditions) at candidate rate is above the actual | |
1113 | * measured "active" throughput (but less than expected | |
1114 | * "active" throughput under perfect conditions). | |
1115 | * OR | |
1116 | * 2) "Active" mode has been working perfectly or very well | |
1117 | * and expected "search" throughput (under perfect | |
1118 | * conditions) at candidate rate is above expected | |
1119 | * "active" throughput (under perfect conditions). | |
1120 | */ | |
232913b5 | 1121 | if ((100 * tpt_tbl[rate] > lq_sta->last_tpt && |
e7392364 SG |
1122 | (active_sr > RATE_DECREASE_TH && active_sr <= RATE_HIGH_TH |
1123 | && tpt_tbl[rate] <= active_tpt)) || | |
2eb05816 | 1124 | (active_sr >= RATE_SCALE_SWITCH && |
232913b5 | 1125 | tpt_tbl[rate] > active_tpt)) { |
be663ab6 WYG |
1126 | |
1127 | /* (2nd or later pass) | |
1128 | * If we've already tried to raise the rate, and are | |
1129 | * now trying to lower it, use the higher rate. */ | |
2eb05816 | 1130 | if (start_hi != RATE_INVALID) { |
be663ab6 WYG |
1131 | new_rate = start_hi; |
1132 | break; | |
1133 | } | |
1134 | ||
1135 | new_rate = rate; | |
1136 | ||
1137 | /* Loop again with lower rate */ | |
2eb05816 | 1138 | if (low != RATE_INVALID) |
be663ab6 WYG |
1139 | rate = low; |
1140 | ||
1141 | /* Lower rate not available, use the original */ | |
1142 | else | |
1143 | break; | |
1144 | ||
e7392364 | 1145 | /* Else try to raise the "search" rate to match "active" */ |
be663ab6 WYG |
1146 | } else { |
1147 | /* (2nd or later pass) | |
1148 | * If we've already tried to lower the rate, and are | |
1149 | * now trying to raise it, use the lower rate. */ | |
2eb05816 | 1150 | if (new_rate != RATE_INVALID) |
be663ab6 WYG |
1151 | break; |
1152 | ||
1153 | /* Loop again with higher rate */ | |
2eb05816 | 1154 | else if (high != RATE_INVALID) { |
be663ab6 WYG |
1155 | start_hi = high; |
1156 | rate = high; | |
1157 | ||
e7392364 | 1158 | /* Higher rate not available, use the original */ |
be663ab6 WYG |
1159 | } else { |
1160 | new_rate = rate; | |
1161 | break; | |
1162 | } | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | return new_rate; | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * Set up search table for MIMO2 | |
1171 | */ | |
e7392364 SG |
1172 | static int |
1173 | il4965_rs_switch_to_mimo2(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1174 | struct ieee80211_conf *conf, | |
1175 | struct ieee80211_sta *sta, | |
1176 | struct il_scale_tbl_info *tbl, int idx) | |
be663ab6 WYG |
1177 | { |
1178 | u16 rate_mask; | |
1179 | s32 rate; | |
1180 | s8 is_green = lq_sta->is_green; | |
be663ab6 WYG |
1181 | |
1182 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1183 | return -1; | |
1184 | ||
af0ed69b | 1185 | if (sta->smps_mode == IEEE80211_SMPS_STATIC) |
be663ab6 WYG |
1186 | return -1; |
1187 | ||
1188 | /* Need both Tx chains/antennas to support MIMO */ | |
46bc8d4b | 1189 | if (il->hw_params.tx_chains_num < 2) |
be663ab6 WYG |
1190 | return -1; |
1191 | ||
58de00a4 | 1192 | D_RATE("LQ: try to switch to MIMO2\n"); |
be663ab6 WYG |
1193 | |
1194 | tbl->lq_type = LQ_MIMO2; | |
1195 | tbl->is_dup = lq_sta->is_dup; | |
1196 | tbl->action = 0; | |
e2ebc833 | 1197 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
1198 | rate_mask = lq_sta->active_mimo2_rate; |
1199 | ||
83007196 | 1200 | if (il_is_ht40_tx_allowed(il, &sta->ht_cap)) |
be663ab6 WYG |
1201 | tbl->is_ht40 = 1; |
1202 | else | |
1203 | tbl->is_ht40 = 0; | |
1204 | ||
e2ebc833 | 1205 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
be663ab6 | 1206 | |
0c2c8852 | 1207 | rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx); |
be663ab6 | 1208 | |
e7392364 | 1209 | D_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
2eb05816 | 1210 | if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) { |
e7392364 SG |
1211 | D_RATE("Can't switch with idx %d rate mask %x\n", rate, |
1212 | rate_mask); | |
be663ab6 WYG |
1213 | return -1; |
1214 | } | |
e7392364 SG |
1215 | tbl->current_rate = |
1216 | il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green); | |
be663ab6 | 1217 | |
e7392364 SG |
1218 | D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate, |
1219 | is_green); | |
be663ab6 WYG |
1220 | return 0; |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * Set up search table for SISO | |
1225 | */ | |
e7392364 SG |
1226 | static int |
1227 | il4965_rs_switch_to_siso(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1228 | struct ieee80211_conf *conf, struct ieee80211_sta *sta, | |
1229 | struct il_scale_tbl_info *tbl, int idx) | |
be663ab6 WYG |
1230 | { |
1231 | u16 rate_mask; | |
1232 | u8 is_green = lq_sta->is_green; | |
1233 | s32 rate; | |
be663ab6 WYG |
1234 | |
1235 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1236 | return -1; | |
1237 | ||
58de00a4 | 1238 | D_RATE("LQ: try to switch to SISO\n"); |
be663ab6 WYG |
1239 | |
1240 | tbl->is_dup = lq_sta->is_dup; | |
1241 | tbl->lq_type = LQ_SISO; | |
1242 | tbl->action = 0; | |
e2ebc833 | 1243 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
1244 | rate_mask = lq_sta->active_siso_rate; |
1245 | ||
83007196 | 1246 | if (il_is_ht40_tx_allowed(il, &sta->ht_cap)) |
be663ab6 WYG |
1247 | tbl->is_ht40 = 1; |
1248 | else | |
1249 | tbl->is_ht40 = 0; | |
1250 | ||
1251 | if (is_green) | |
e7392364 | 1252 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield */ |
be663ab6 | 1253 | |
e2ebc833 | 1254 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
0c2c8852 | 1255 | rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx); |
be663ab6 | 1256 | |
58de00a4 | 1257 | D_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
2eb05816 | 1258 | if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) { |
e7392364 SG |
1259 | D_RATE("can not switch with idx %d rate mask %x\n", rate, |
1260 | rate_mask); | |
be663ab6 WYG |
1261 | return -1; |
1262 | } | |
e7392364 SG |
1263 | tbl->current_rate = |
1264 | il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green); | |
1265 | D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate, | |
1266 | is_green); | |
be663ab6 WYG |
1267 | return 0; |
1268 | } | |
1269 | ||
1270 | /* | |
1271 | * Try to switch to new modulation mode from legacy | |
1272 | */ | |
e7392364 SG |
1273 | static int |
1274 | il4965_rs_move_legacy_other(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1275 | struct ieee80211_conf *conf, | |
1276 | struct ieee80211_sta *sta, int idx) | |
be663ab6 | 1277 | { |
e2ebc833 SG |
1278 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1279 | struct il_scale_tbl_info *search_tbl = | |
e7392364 | 1280 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
0c2c8852 | 1281 | struct il_rate_scale_data *win = &(tbl->win[idx]); |
e7392364 SG |
1282 | u32 sz = |
1283 | (sizeof(struct il_scale_tbl_info) - | |
1284 | (sizeof(struct il_rate_scale_data) * RATE_COUNT)); | |
be663ab6 | 1285 | u8 start_action; |
46bc8d4b SG |
1286 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1287 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1288 | int ret = 0; |
1289 | u8 update_search_tbl_counter = 0; | |
1290 | ||
e2ebc833 | 1291 | tbl->action = IL_LEGACY_SWITCH_SISO; |
be663ab6 WYG |
1292 | |
1293 | start_action = tbl->action; | |
e7392364 | 1294 | for (;;) { |
be663ab6 WYG |
1295 | lq_sta->action_counter++; |
1296 | switch (tbl->action) { | |
e2ebc833 SG |
1297 | case IL_LEGACY_SWITCH_ANTENNA1: |
1298 | case IL_LEGACY_SWITCH_ANTENNA2: | |
58de00a4 | 1299 | D_RATE("LQ: Legacy toggle Antenna\n"); |
be663ab6 | 1300 | |
e2ebc833 | 1301 | if ((tbl->action == IL_LEGACY_SWITCH_ANTENNA1 && |
e7392364 | 1302 | tx_chains_num <= 1) || |
e2ebc833 | 1303 | (tbl->action == IL_LEGACY_SWITCH_ANTENNA2 && |
e7392364 | 1304 | tx_chains_num <= 2)) |
be663ab6 WYG |
1305 | break; |
1306 | ||
1307 | /* Don't change antenna if success has been great */ | |
6ce1dc45 | 1308 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1309 | break; |
1310 | ||
1311 | /* Set up search table to try other antenna */ | |
1312 | memcpy(search_tbl, tbl, sz); | |
1313 | ||
e7392364 SG |
1314 | if (il4965_rs_toggle_antenna |
1315 | (valid_tx_ant, &search_tbl->current_rate, | |
1316 | search_tbl)) { | |
be663ab6 | 1317 | update_search_tbl_counter = 1; |
e2ebc833 | 1318 | il4965_rs_set_expected_tpt_table(lq_sta, |
e7392364 | 1319 | search_tbl); |
be663ab6 WYG |
1320 | goto out; |
1321 | } | |
1322 | break; | |
e2ebc833 | 1323 | case IL_LEGACY_SWITCH_SISO: |
58de00a4 | 1324 | D_RATE("LQ: Legacy switch to SISO\n"); |
be663ab6 WYG |
1325 | |
1326 | /* Set up search table to try SISO */ | |
1327 | memcpy(search_tbl, tbl, sz); | |
1328 | search_tbl->is_SGI = 0; | |
e7392364 SG |
1329 | ret = |
1330 | il4965_rs_switch_to_siso(il, lq_sta, conf, sta, | |
1331 | search_tbl, idx); | |
be663ab6 WYG |
1332 | if (!ret) { |
1333 | lq_sta->action_counter = 0; | |
1334 | goto out; | |
1335 | } | |
1336 | ||
1337 | break; | |
e2ebc833 SG |
1338 | case IL_LEGACY_SWITCH_MIMO2_AB: |
1339 | case IL_LEGACY_SWITCH_MIMO2_AC: | |
1340 | case IL_LEGACY_SWITCH_MIMO2_BC: | |
58de00a4 | 1341 | D_RATE("LQ: Legacy switch to MIMO2\n"); |
be663ab6 WYG |
1342 | |
1343 | /* Set up search table to try MIMO */ | |
1344 | memcpy(search_tbl, tbl, sz); | |
1345 | search_tbl->is_SGI = 0; | |
1346 | ||
e2ebc833 | 1347 | if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AB) |
be663ab6 | 1348 | search_tbl->ant_type = ANT_AB; |
e2ebc833 | 1349 | else if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AC) |
be663ab6 WYG |
1350 | search_tbl->ant_type = ANT_AC; |
1351 | else | |
1352 | search_tbl->ant_type = ANT_BC; | |
1353 | ||
e7392364 SG |
1354 | if (!il4965_rs_is_valid_ant |
1355 | (valid_tx_ant, search_tbl->ant_type)) | |
be663ab6 WYG |
1356 | break; |
1357 | ||
e7392364 SG |
1358 | ret = |
1359 | il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta, | |
1360 | search_tbl, idx); | |
be663ab6 WYG |
1361 | if (!ret) { |
1362 | lq_sta->action_counter = 0; | |
1363 | goto out; | |
1364 | } | |
1365 | break; | |
1366 | } | |
1367 | tbl->action++; | |
e2ebc833 SG |
1368 | if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
1369 | tbl->action = IL_LEGACY_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1370 | |
1371 | if (tbl->action == start_action) | |
1372 | break; | |
1373 | ||
1374 | } | |
1375 | search_tbl->lq_type = LQ_NONE; | |
1376 | return 0; | |
1377 | ||
1378 | out: | |
1379 | lq_sta->search_better_tbl = 1; | |
1380 | tbl->action++; | |
e2ebc833 SG |
1381 | if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
1382 | tbl->action = IL_LEGACY_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1383 | if (update_search_tbl_counter) |
1384 | search_tbl->action = tbl->action; | |
1385 | return 0; | |
1386 | ||
1387 | } | |
1388 | ||
1389 | /* | |
1390 | * Try to switch to new modulation mode from SISO | |
1391 | */ | |
e7392364 SG |
1392 | static int |
1393 | il4965_rs_move_siso_to_other(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1394 | struct ieee80211_conf *conf, | |
1395 | struct ieee80211_sta *sta, int idx) | |
be663ab6 WYG |
1396 | { |
1397 | u8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1398 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1399 | struct il_scale_tbl_info *search_tbl = | |
e7392364 | 1400 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
0c2c8852 | 1401 | struct il_rate_scale_data *win = &(tbl->win[idx]); |
be663ab6 | 1402 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e7392364 SG |
1403 | u32 sz = |
1404 | (sizeof(struct il_scale_tbl_info) - | |
1405 | (sizeof(struct il_rate_scale_data) * RATE_COUNT)); | |
be663ab6 | 1406 | u8 start_action; |
46bc8d4b SG |
1407 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1408 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1409 | u8 update_search_tbl_counter = 0; |
1410 | int ret; | |
1411 | ||
1412 | start_action = tbl->action; | |
1413 | ||
1414 | for (;;) { | |
1415 | lq_sta->action_counter++; | |
1416 | switch (tbl->action) { | |
e2ebc833 SG |
1417 | case IL_SISO_SWITCH_ANTENNA1: |
1418 | case IL_SISO_SWITCH_ANTENNA2: | |
58de00a4 | 1419 | D_RATE("LQ: SISO toggle Antenna\n"); |
e2ebc833 | 1420 | if ((tbl->action == IL_SISO_SWITCH_ANTENNA1 && |
e7392364 | 1421 | tx_chains_num <= 1) || |
e2ebc833 | 1422 | (tbl->action == IL_SISO_SWITCH_ANTENNA2 && |
e7392364 | 1423 | tx_chains_num <= 2)) |
be663ab6 WYG |
1424 | break; |
1425 | ||
6ce1dc45 | 1426 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1427 | break; |
1428 | ||
1429 | memcpy(search_tbl, tbl, sz); | |
e7392364 SG |
1430 | if (il4965_rs_toggle_antenna |
1431 | (valid_tx_ant, &search_tbl->current_rate, | |
1432 | search_tbl)) { | |
be663ab6 WYG |
1433 | update_search_tbl_counter = 1; |
1434 | goto out; | |
1435 | } | |
1436 | break; | |
e2ebc833 SG |
1437 | case IL_SISO_SWITCH_MIMO2_AB: |
1438 | case IL_SISO_SWITCH_MIMO2_AC: | |
1439 | case IL_SISO_SWITCH_MIMO2_BC: | |
58de00a4 | 1440 | D_RATE("LQ: SISO switch to MIMO2\n"); |
be663ab6 WYG |
1441 | memcpy(search_tbl, tbl, sz); |
1442 | search_tbl->is_SGI = 0; | |
1443 | ||
e2ebc833 | 1444 | if (tbl->action == IL_SISO_SWITCH_MIMO2_AB) |
be663ab6 | 1445 | search_tbl->ant_type = ANT_AB; |
e2ebc833 | 1446 | else if (tbl->action == IL_SISO_SWITCH_MIMO2_AC) |
be663ab6 WYG |
1447 | search_tbl->ant_type = ANT_AC; |
1448 | else | |
1449 | search_tbl->ant_type = ANT_BC; | |
1450 | ||
e7392364 SG |
1451 | if (!il4965_rs_is_valid_ant |
1452 | (valid_tx_ant, search_tbl->ant_type)) | |
be663ab6 WYG |
1453 | break; |
1454 | ||
e7392364 SG |
1455 | ret = |
1456 | il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta, | |
1457 | search_tbl, idx); | |
be663ab6 WYG |
1458 | if (!ret) |
1459 | goto out; | |
1460 | break; | |
e2ebc833 | 1461 | case IL_SISO_SWITCH_GI: |
e7392364 SG |
1462 | if (!tbl->is_ht40 && |
1463 | !(ht_cap->cap & IEEE80211_HT_CAP_SGI_20)) | |
be663ab6 | 1464 | break; |
e7392364 SG |
1465 | if (tbl->is_ht40 && |
1466 | !(ht_cap->cap & IEEE80211_HT_CAP_SGI_40)) | |
be663ab6 WYG |
1467 | break; |
1468 | ||
58de00a4 | 1469 | D_RATE("LQ: SISO toggle SGI/NGI\n"); |
be663ab6 WYG |
1470 | |
1471 | memcpy(search_tbl, tbl, sz); | |
1472 | if (is_green) { | |
1473 | if (!tbl->is_SGI) | |
1474 | break; | |
1475 | else | |
e7392364 | 1476 | IL_ERR("SGI was set in GF+SISO\n"); |
be663ab6 WYG |
1477 | } |
1478 | search_tbl->is_SGI = !tbl->is_SGI; | |
e2ebc833 | 1479 | il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
be663ab6 WYG |
1480 | if (tbl->is_SGI) { |
1481 | s32 tpt = lq_sta->last_tpt / 100; | |
0c2c8852 | 1482 | if (tpt >= search_tbl->expected_tpt[idx]) |
be663ab6 WYG |
1483 | break; |
1484 | } | |
1485 | search_tbl->current_rate = | |
e7392364 SG |
1486 | il4965_rate_n_flags_from_tbl(il, search_tbl, idx, |
1487 | is_green); | |
be663ab6 WYG |
1488 | update_search_tbl_counter = 1; |
1489 | goto out; | |
1490 | } | |
1491 | tbl->action++; | |
e2ebc833 SG |
1492 | if (tbl->action > IL_SISO_SWITCH_GI) |
1493 | tbl->action = IL_SISO_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1494 | |
1495 | if (tbl->action == start_action) | |
1496 | break; | |
1497 | } | |
1498 | search_tbl->lq_type = LQ_NONE; | |
1499 | return 0; | |
1500 | ||
e7392364 | 1501 | out: |
be663ab6 WYG |
1502 | lq_sta->search_better_tbl = 1; |
1503 | tbl->action++; | |
e2ebc833 SG |
1504 | if (tbl->action > IL_SISO_SWITCH_GI) |
1505 | tbl->action = IL_SISO_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1506 | if (update_search_tbl_counter) |
1507 | search_tbl->action = tbl->action; | |
1508 | ||
1509 | return 0; | |
1510 | } | |
1511 | ||
1512 | /* | |
1513 | * Try to switch to new modulation mode from MIMO2 | |
1514 | */ | |
e7392364 SG |
1515 | static int |
1516 | il4965_rs_move_mimo2_to_other(struct il_priv *il, struct il_lq_sta *lq_sta, | |
1517 | struct ieee80211_conf *conf, | |
1518 | struct ieee80211_sta *sta, int idx) | |
be663ab6 WYG |
1519 | { |
1520 | s8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1521 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1522 | struct il_scale_tbl_info *search_tbl = | |
e7392364 | 1523 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
0c2c8852 | 1524 | struct il_rate_scale_data *win = &(tbl->win[idx]); |
be663ab6 | 1525 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e7392364 SG |
1526 | u32 sz = |
1527 | (sizeof(struct il_scale_tbl_info) - | |
1528 | (sizeof(struct il_rate_scale_data) * RATE_COUNT)); | |
be663ab6 | 1529 | u8 start_action; |
46bc8d4b SG |
1530 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1531 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1532 | u8 update_search_tbl_counter = 0; |
1533 | int ret; | |
1534 | ||
1535 | start_action = tbl->action; | |
1536 | for (;;) { | |
1537 | lq_sta->action_counter++; | |
1538 | switch (tbl->action) { | |
e2ebc833 SG |
1539 | case IL_MIMO2_SWITCH_ANTENNA1: |
1540 | case IL_MIMO2_SWITCH_ANTENNA2: | |
58de00a4 | 1541 | D_RATE("LQ: MIMO2 toggle Antennas\n"); |
be663ab6 WYG |
1542 | |
1543 | if (tx_chains_num <= 2) | |
1544 | break; | |
1545 | ||
6ce1dc45 | 1546 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1547 | break; |
1548 | ||
1549 | memcpy(search_tbl, tbl, sz); | |
e7392364 SG |
1550 | if (il4965_rs_toggle_antenna |
1551 | (valid_tx_ant, &search_tbl->current_rate, | |
1552 | search_tbl)) { | |
be663ab6 WYG |
1553 | update_search_tbl_counter = 1; |
1554 | goto out; | |
1555 | } | |
1556 | break; | |
e2ebc833 SG |
1557 | case IL_MIMO2_SWITCH_SISO_A: |
1558 | case IL_MIMO2_SWITCH_SISO_B: | |
1559 | case IL_MIMO2_SWITCH_SISO_C: | |
58de00a4 | 1560 | D_RATE("LQ: MIMO2 switch to SISO\n"); |
be663ab6 WYG |
1561 | |
1562 | /* Set up new search table for SISO */ | |
1563 | memcpy(search_tbl, tbl, sz); | |
1564 | ||
e2ebc833 | 1565 | if (tbl->action == IL_MIMO2_SWITCH_SISO_A) |
be663ab6 | 1566 | search_tbl->ant_type = ANT_A; |
e2ebc833 | 1567 | else if (tbl->action == IL_MIMO2_SWITCH_SISO_B) |
be663ab6 WYG |
1568 | search_tbl->ant_type = ANT_B; |
1569 | else | |
1570 | search_tbl->ant_type = ANT_C; | |
1571 | ||
e7392364 SG |
1572 | if (!il4965_rs_is_valid_ant |
1573 | (valid_tx_ant, search_tbl->ant_type)) | |
be663ab6 WYG |
1574 | break; |
1575 | ||
e7392364 SG |
1576 | ret = |
1577 | il4965_rs_switch_to_siso(il, lq_sta, conf, sta, | |
1578 | search_tbl, idx); | |
be663ab6 WYG |
1579 | if (!ret) |
1580 | goto out; | |
1581 | ||
1582 | break; | |
1583 | ||
e2ebc833 | 1584 | case IL_MIMO2_SWITCH_GI: |
e7392364 SG |
1585 | if (!tbl->is_ht40 && |
1586 | !(ht_cap->cap & IEEE80211_HT_CAP_SGI_20)) | |
be663ab6 | 1587 | break; |
e7392364 SG |
1588 | if (tbl->is_ht40 && |
1589 | !(ht_cap->cap & IEEE80211_HT_CAP_SGI_40)) | |
be663ab6 WYG |
1590 | break; |
1591 | ||
58de00a4 | 1592 | D_RATE("LQ: MIMO2 toggle SGI/NGI\n"); |
be663ab6 WYG |
1593 | |
1594 | /* Set up new search table for MIMO2 */ | |
1595 | memcpy(search_tbl, tbl, sz); | |
1596 | search_tbl->is_SGI = !tbl->is_SGI; | |
e2ebc833 | 1597 | il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
be663ab6 WYG |
1598 | /* |
1599 | * If active table already uses the fastest possible | |
1600 | * modulation (dual stream with short guard interval), | |
1601 | * and it's working well, there's no need to look | |
1602 | * for a better type of modulation! | |
1603 | */ | |
1604 | if (tbl->is_SGI) { | |
1605 | s32 tpt = lq_sta->last_tpt / 100; | |
0c2c8852 | 1606 | if (tpt >= search_tbl->expected_tpt[idx]) |
be663ab6 WYG |
1607 | break; |
1608 | } | |
1609 | search_tbl->current_rate = | |
e7392364 SG |
1610 | il4965_rate_n_flags_from_tbl(il, search_tbl, idx, |
1611 | is_green); | |
be663ab6 WYG |
1612 | update_search_tbl_counter = 1; |
1613 | goto out; | |
1614 | ||
1615 | } | |
1616 | tbl->action++; | |
e2ebc833 SG |
1617 | if (tbl->action > IL_MIMO2_SWITCH_GI) |
1618 | tbl->action = IL_MIMO2_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1619 | |
1620 | if (tbl->action == start_action) | |
1621 | break; | |
1622 | } | |
1623 | search_tbl->lq_type = LQ_NONE; | |
1624 | return 0; | |
e7392364 | 1625 | out: |
be663ab6 WYG |
1626 | lq_sta->search_better_tbl = 1; |
1627 | tbl->action++; | |
e2ebc833 SG |
1628 | if (tbl->action > IL_MIMO2_SWITCH_GI) |
1629 | tbl->action = IL_MIMO2_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1630 | if (update_search_tbl_counter) |
1631 | search_tbl->action = tbl->action; | |
1632 | ||
1633 | return 0; | |
1634 | ||
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * Check whether we should continue using same modulation mode, or | |
1639 | * begin search for a new mode, based on: | |
1640 | * 1) # tx successes or failures while using this mode | |
1641 | * 2) # times calling this function | |
1642 | * 3) elapsed time in this mode (not used, for now) | |
1643 | */ | |
1644 | static void | |
e2ebc833 | 1645 | il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, bool force_search) |
be663ab6 | 1646 | { |
e2ebc833 | 1647 | struct il_scale_tbl_info *tbl; |
be663ab6 WYG |
1648 | int i; |
1649 | int active_tbl; | |
1650 | int flush_interval_passed = 0; | |
46bc8d4b | 1651 | struct il_priv *il; |
be663ab6 | 1652 | |
46bc8d4b | 1653 | il = lq_sta->drv; |
be663ab6 WYG |
1654 | active_tbl = lq_sta->active_tbl; |
1655 | ||
1656 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1657 | ||
1658 | /* If we've been disallowing search, see if we should now allow it */ | |
1659 | if (lq_sta->stay_in_tbl) { | |
1660 | ||
1661 | /* Elapsed time using current modulation mode */ | |
1662 | if (lq_sta->flush_timer) | |
1663 | flush_interval_passed = | |
e7392364 SG |
1664 | time_after(jiffies, |
1665 | (unsigned long)(lq_sta->flush_timer + | |
1666 | RATE_SCALE_FLUSH_INTVL)); | |
be663ab6 WYG |
1667 | |
1668 | /* | |
1669 | * Check if we should allow search for new modulation mode. | |
1670 | * If many frames have failed or succeeded, or we've used | |
1671 | * this same modulation for a long time, allow search, and | |
1672 | * reset history stats that keep track of whether we should | |
1673 | * allow a new search. Also (below) reset all bitmaps and | |
1674 | * stats in active history. | |
1675 | */ | |
1676 | if (force_search || | |
232913b5 SG |
1677 | lq_sta->total_failed > lq_sta->max_failure_limit || |
1678 | lq_sta->total_success > lq_sta->max_success_limit || | |
1679 | (!lq_sta->search_better_tbl && lq_sta->flush_timer && | |
1680 | flush_interval_passed)) { | |
ff5e5685 | 1681 | D_RATE("LQ: stay is expired %d %d %d\n", |
e7392364 SG |
1682 | lq_sta->total_failed, lq_sta->total_success, |
1683 | flush_interval_passed); | |
be663ab6 WYG |
1684 | |
1685 | /* Allow search for new mode */ | |
1686 | lq_sta->stay_in_tbl = 0; /* only place reset */ | |
1687 | lq_sta->total_failed = 0; | |
1688 | lq_sta->total_success = 0; | |
1689 | lq_sta->flush_timer = 0; | |
1690 | ||
e7392364 SG |
1691 | /* |
1692 | * Else if we've used this modulation mode enough repetitions | |
1693 | * (regardless of elapsed time or success/failure), reset | |
1694 | * history bitmaps and rate-specific stats for all rates in | |
1695 | * active table. | |
1696 | */ | |
be663ab6 WYG |
1697 | } else { |
1698 | lq_sta->table_count++; | |
e7392364 | 1699 | if (lq_sta->table_count >= lq_sta->table_count_limit) { |
be663ab6 WYG |
1700 | lq_sta->table_count = 0; |
1701 | ||
e7392364 | 1702 | D_RATE("LQ: stay in table clear win\n"); |
2eb05816 | 1703 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 SG |
1704 | il4965_rs_rate_scale_clear_win(& |
1705 | (tbl-> | |
1706 | win | |
1707 | [i])); | |
be663ab6 WYG |
1708 | } |
1709 | } | |
1710 | ||
1711 | /* If transitioning to allow "search", reset all history | |
1712 | * bitmaps and stats in active table (this will become the new | |
1713 | * "search" table). */ | |
1714 | if (!lq_sta->stay_in_tbl) { | |
2eb05816 | 1715 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 | 1716 | il4965_rs_rate_scale_clear_win(&(tbl->win[i])); |
be663ab6 WYG |
1717 | } |
1718 | } | |
1719 | } | |
1720 | ||
1721 | /* | |
1722 | * setup rate table in uCode | |
be663ab6 | 1723 | */ |
a741b995 | 1724 | static void |
83007196 | 1725 | il4965_rs_update_rate_tbl(struct il_priv *il, struct il_lq_sta *lq_sta, |
e7392364 | 1726 | struct il_scale_tbl_info *tbl, int idx, u8 is_green) |
be663ab6 WYG |
1727 | { |
1728 | u32 rate; | |
1729 | ||
1730 | /* Update uCode's rate table. */ | |
0c2c8852 | 1731 | rate = il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green); |
46bc8d4b | 1732 | il4965_rs_fill_link_cmd(il, lq_sta, rate); |
83007196 | 1733 | il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false); |
be663ab6 WYG |
1734 | } |
1735 | ||
1736 | /* | |
1737 | * Do rate scaling and search for new modulation mode. | |
1738 | */ | |
e7392364 SG |
1739 | static void |
1740 | il4965_rs_rate_scale_perform(struct il_priv *il, struct sk_buff *skb, | |
1741 | struct ieee80211_sta *sta, | |
1742 | struct il_lq_sta *lq_sta) | |
be663ab6 | 1743 | { |
46bc8d4b | 1744 | struct ieee80211_hw *hw = il->hw; |
be663ab6 WYG |
1745 | struct ieee80211_conf *conf = &hw->conf; |
1746 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1747 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
2eb05816 SG |
1748 | int low = RATE_INVALID; |
1749 | int high = RATE_INVALID; | |
0c2c8852 | 1750 | int idx; |
be663ab6 | 1751 | int i; |
6ce1dc45 | 1752 | struct il_rate_scale_data *win = NULL; |
e2ebc833 SG |
1753 | int current_tpt = IL_INVALID_VALUE; |
1754 | int low_tpt = IL_INVALID_VALUE; | |
1755 | int high_tpt = IL_INVALID_VALUE; | |
be663ab6 WYG |
1756 | u32 fail_count; |
1757 | s8 scale_action = 0; | |
1758 | u16 rate_mask; | |
1759 | u8 update_lq = 0; | |
e2ebc833 | 1760 | struct il_scale_tbl_info *tbl, *tbl1; |
0c2c8852 | 1761 | u16 rate_scale_idx_msk = 0; |
be663ab6 WYG |
1762 | u8 is_green = 0; |
1763 | u8 active_tbl = 0; | |
1764 | u8 done_search = 0; | |
1765 | u16 high_low; | |
1766 | s32 sr; | |
1767 | u8 tid = MAX_TID_COUNT; | |
e2ebc833 | 1768 | struct il_tid_data *tid_data; |
be663ab6 | 1769 | |
58de00a4 | 1770 | D_RATE("rate scale calculate new rate for skb\n"); |
be663ab6 WYG |
1771 | |
1772 | /* Send management frames and NO_ACK data using lowest rate. */ | |
1773 | /* TODO: this could probably be improved.. */ | |
1774 | if (!ieee80211_is_data(hdr->frame_control) || | |
232913b5 | 1775 | (info->flags & IEEE80211_TX_CTL_NO_ACK)) |
be663ab6 WYG |
1776 | return; |
1777 | ||
be663ab6 WYG |
1778 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
1779 | ||
e2ebc833 | 1780 | tid = il4965_rs_tl_add_packet(lq_sta, hdr); |
232913b5 | 1781 | if (tid != MAX_TID_COUNT && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
46bc8d4b | 1782 | tid_data = &il->stations[lq_sta->lq.sta_id].tid[tid]; |
e2ebc833 | 1783 | if (tid_data->agg.state == IL_AGG_OFF) |
be663ab6 WYG |
1784 | lq_sta->is_agg = 0; |
1785 | else | |
1786 | lq_sta->is_agg = 1; | |
1787 | } else | |
1788 | lq_sta->is_agg = 0; | |
1789 | ||
1790 | /* | |
1791 | * Select rate-scale / modulation-mode table to work with in | |
1792 | * the rest of this function: "search" if searching for better | |
1793 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1794 | */ | |
1795 | if (!lq_sta->search_better_tbl) | |
1796 | active_tbl = lq_sta->active_tbl; | |
1797 | else | |
1798 | active_tbl = 1 - lq_sta->active_tbl; | |
1799 | ||
1800 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1801 | if (is_legacy(tbl->lq_type)) | |
1802 | lq_sta->is_green = 0; | |
1803 | else | |
1c03c462 | 1804 | lq_sta->is_green = il4965_rs_use_green(il, sta); |
be663ab6 WYG |
1805 | is_green = lq_sta->is_green; |
1806 | ||
1807 | /* current tx rate */ | |
0c2c8852 | 1808 | idx = lq_sta->last_txrate_idx; |
be663ab6 | 1809 | |
e7392364 | 1810 | D_RATE("Rate scale idx %d for type %d\n", idx, tbl->lq_type); |
be663ab6 WYG |
1811 | |
1812 | /* rates available for this association, and for modulation mode */ | |
e2ebc833 | 1813 | rate_mask = il4965_rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
be663ab6 | 1814 | |
58de00a4 | 1815 | D_RATE("mask 0x%04X\n", rate_mask); |
be663ab6 WYG |
1816 | |
1817 | /* mask with station rate restriction */ | |
1818 | if (is_legacy(tbl->lq_type)) { | |
1819 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1820 | /* supp_rates has no CCK bits in A mode */ | |
e7392364 SG |
1821 | rate_scale_idx_msk = |
1822 | (u16) (rate_mask & | |
1823 | (lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); | |
be663ab6 | 1824 | else |
e7392364 SG |
1825 | rate_scale_idx_msk = |
1826 | (u16) (rate_mask & lq_sta->supp_rates); | |
be663ab6 WYG |
1827 | |
1828 | } else | |
0c2c8852 | 1829 | rate_scale_idx_msk = rate_mask; |
be663ab6 | 1830 | |
0c2c8852 SG |
1831 | if (!rate_scale_idx_msk) |
1832 | rate_scale_idx_msk = rate_mask; | |
be663ab6 | 1833 | |
0c2c8852 | 1834 | if (!((1 << idx) & rate_scale_idx_msk)) { |
9406f797 | 1835 | IL_ERR("Current Rate is not valid\n"); |
be663ab6 | 1836 | if (lq_sta->search_better_tbl) { |
e7392364 | 1837 | /* revert to active table if search table is not valid */ |
be663ab6 WYG |
1838 | tbl->lq_type = LQ_NONE; |
1839 | lq_sta->search_better_tbl = 0; | |
1840 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1841 | /* get "active" rate info */ | |
0c2c8852 | 1842 | idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
83007196 | 1843 | il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx, |
e7392364 | 1844 | is_green); |
be663ab6 WYG |
1845 | } |
1846 | return; | |
1847 | } | |
1848 | ||
6ce1dc45 | 1849 | /* Get expected throughput table and history win for current rate */ |
be663ab6 | 1850 | if (!tbl->expected_tpt) { |
9406f797 | 1851 | IL_ERR("tbl->expected_tpt is NULL\n"); |
be663ab6 WYG |
1852 | return; |
1853 | } | |
1854 | ||
1855 | /* force user max rate if set by user */ | |
e7392364 | 1856 | if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < idx) { |
0c2c8852 | 1857 | idx = lq_sta->max_rate_idx; |
be663ab6 | 1858 | update_lq = 1; |
0c2c8852 | 1859 | win = &(tbl->win[idx]); |
be663ab6 WYG |
1860 | goto lq_update; |
1861 | } | |
1862 | ||
0c2c8852 | 1863 | win = &(tbl->win[idx]); |
be663ab6 WYG |
1864 | |
1865 | /* | |
1866 | * If there is not enough history to calculate actual average | |
1867 | * throughput, keep analyzing results of more tx frames, without | |
1868 | * changing rate or mode (bypass most of the rest of this function). | |
1869 | * Set up new rate table in uCode only if old rate is not supported | |
1870 | * in current association (use new rate found above). | |
1871 | */ | |
6ce1dc45 | 1872 | fail_count = win->counter - win->success_counter; |
2eb05816 SG |
1873 | if (fail_count < RATE_MIN_FAILURE_TH && |
1874 | win->success_counter < RATE_MIN_SUCCESS_TH) { | |
e7392364 SG |
1875 | D_RATE("LQ: still below TH. succ=%d total=%d " "for idx %d\n", |
1876 | win->success_counter, win->counter, idx); | |
be663ab6 WYG |
1877 | |
1878 | /* Can't calculate this yet; not enough history */ | |
6ce1dc45 | 1879 | win->average_tpt = IL_INVALID_VALUE; |
be663ab6 WYG |
1880 | |
1881 | /* Should we stay with this modulation mode, | |
1882 | * or search for a new one? */ | |
e2ebc833 | 1883 | il4965_rs_stay_in_table(lq_sta, false); |
be663ab6 WYG |
1884 | |
1885 | goto out; | |
1886 | } | |
1887 | /* Else we have enough samples; calculate estimate of | |
1888 | * actual average throughput */ | |
e7392364 SG |
1889 | if (win->average_tpt != |
1890 | ((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128)) { | |
1891 | IL_ERR("expected_tpt should have been calculated by now\n"); | |
1892 | win->average_tpt = | |
1893 | ((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128); | |
be663ab6 WYG |
1894 | } |
1895 | ||
1896 | /* If we are searching for better modulation mode, check success. */ | |
1897 | if (lq_sta->search_better_tbl) { | |
1898 | /* If good success, continue using the "search" mode; | |
1899 | * no need to send new link quality command, since we're | |
1900 | * continuing to use the setup that we've been trying. */ | |
6ce1dc45 | 1901 | if (win->average_tpt > lq_sta->last_tpt) { |
be663ab6 | 1902 | |
3b98c7f4 | 1903 | D_RATE("LQ: SWITCHING TO NEW TBL " |
e7392364 SG |
1904 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1905 | win->success_ratio, win->average_tpt, | |
1906 | lq_sta->last_tpt); | |
be663ab6 WYG |
1907 | |
1908 | if (!is_legacy(tbl->lq_type)) | |
1909 | lq_sta->enable_counter = 1; | |
1910 | ||
1911 | /* Swap tables; "search" becomes "active" */ | |
1912 | lq_sta->active_tbl = active_tbl; | |
6ce1dc45 | 1913 | current_tpt = win->average_tpt; |
be663ab6 | 1914 | |
e7392364 | 1915 | /* Else poor success; go back to mode in "active" table */ |
be663ab6 WYG |
1916 | } else { |
1917 | ||
3b98c7f4 | 1918 | D_RATE("LQ: GOING BACK TO THE OLD TBL " |
e7392364 SG |
1919 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1920 | win->success_ratio, win->average_tpt, | |
1921 | lq_sta->last_tpt); | |
be663ab6 WYG |
1922 | |
1923 | /* Nullify "search" table */ | |
1924 | tbl->lq_type = LQ_NONE; | |
1925 | ||
1926 | /* Revert to "active" table */ | |
1927 | active_tbl = lq_sta->active_tbl; | |
1928 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1929 | ||
1930 | /* Revert to "active" rate and throughput info */ | |
0c2c8852 | 1931 | idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
be663ab6 WYG |
1932 | current_tpt = lq_sta->last_tpt; |
1933 | ||
1934 | /* Need to set up a new rate table in uCode */ | |
1935 | update_lq = 1; | |
1936 | } | |
1937 | ||
1938 | /* Either way, we've made a decision; modulation mode | |
1939 | * search is done, allow rate adjustment next time. */ | |
1940 | lq_sta->search_better_tbl = 0; | |
1941 | done_search = 1; /* Don't switch modes below! */ | |
1942 | goto lq_update; | |
1943 | } | |
1944 | ||
1945 | /* (Else) not in search of better modulation mode, try for better | |
1946 | * starting rate, while staying in this mode. */ | |
e7392364 SG |
1947 | high_low = |
1948 | il4965_rs_get_adjacent_rate(il, idx, rate_scale_idx_msk, | |
be663ab6 WYG |
1949 | tbl->lq_type); |
1950 | low = high_low & 0xff; | |
1951 | high = (high_low >> 8) & 0xff; | |
1952 | ||
1953 | /* If user set max rate, dont allow higher than user constrain */ | |
e7392364 | 1954 | if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < high) |
2eb05816 | 1955 | high = RATE_INVALID; |
be663ab6 | 1956 | |
6ce1dc45 | 1957 | sr = win->success_ratio; |
be663ab6 WYG |
1958 | |
1959 | /* Collect measured throughputs for current and adjacent rates */ | |
6ce1dc45 | 1960 | current_tpt = win->average_tpt; |
2eb05816 | 1961 | if (low != RATE_INVALID) |
be663ab6 | 1962 | low_tpt = tbl->win[low].average_tpt; |
2eb05816 | 1963 | if (high != RATE_INVALID) |
be663ab6 WYG |
1964 | high_tpt = tbl->win[high].average_tpt; |
1965 | ||
1966 | scale_action = 0; | |
1967 | ||
1968 | /* Too many failures, decrease rate */ | |
2eb05816 | 1969 | if (sr <= RATE_DECREASE_TH || current_tpt == 0) { |
e7392364 | 1970 | D_RATE("decrease rate because of low success_ratio\n"); |
be663ab6 WYG |
1971 | scale_action = -1; |
1972 | ||
e7392364 SG |
1973 | /* No throughput measured yet for adjacent rates; try increase. */ |
1974 | } else if (low_tpt == IL_INVALID_VALUE && high_tpt == IL_INVALID_VALUE) { | |
be663ab6 | 1975 | |
2eb05816 | 1976 | if (high != RATE_INVALID && sr >= RATE_INCREASE_TH) |
be663ab6 | 1977 | scale_action = 1; |
2eb05816 | 1978 | else if (low != RATE_INVALID) |
be663ab6 WYG |
1979 | scale_action = 0; |
1980 | } | |
1981 | ||
1982 | /* Both adjacent throughputs are measured, but neither one has better | |
1983 | * throughput; we're using the best rate, don't change it! */ | |
232913b5 SG |
1984 | else if (low_tpt != IL_INVALID_VALUE && high_tpt != IL_INVALID_VALUE && |
1985 | low_tpt < current_tpt && high_tpt < current_tpt) | |
be663ab6 WYG |
1986 | scale_action = 0; |
1987 | ||
1988 | /* At least one adjacent rate's throughput is measured, | |
1989 | * and may have better performance. */ | |
1990 | else { | |
1991 | /* Higher adjacent rate's throughput is measured */ | |
e2ebc833 | 1992 | if (high_tpt != IL_INVALID_VALUE) { |
be663ab6 | 1993 | /* Higher rate has better throughput */ |
1722f8e1 | 1994 | if (high_tpt > current_tpt && sr >= RATE_INCREASE_TH) |
be663ab6 | 1995 | scale_action = 1; |
1722f8e1 | 1996 | else |
be663ab6 | 1997 | scale_action = 0; |
be663ab6 | 1998 | |
e7392364 | 1999 | /* Lower adjacent rate's throughput is measured */ |
e2ebc833 | 2000 | } else if (low_tpt != IL_INVALID_VALUE) { |
be663ab6 WYG |
2001 | /* Lower rate has better throughput */ |
2002 | if (low_tpt > current_tpt) { | |
e7392364 | 2003 | D_RATE("decrease rate because of low tpt\n"); |
be663ab6 | 2004 | scale_action = -1; |
2eb05816 | 2005 | } else if (sr >= RATE_INCREASE_TH) { |
be663ab6 WYG |
2006 | scale_action = 1; |
2007 | } | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | /* Sanity check; asked for decrease, but success rate or throughput | |
2012 | * has been good at old rate. Don't change it. */ | |
2eb05816 SG |
2013 | if (scale_action == -1 && low != RATE_INVALID && |
2014 | (sr > RATE_HIGH_TH || current_tpt > 100 * tbl->expected_tpt[low])) | |
be663ab6 WYG |
2015 | scale_action = 0; |
2016 | ||
2017 | switch (scale_action) { | |
2018 | case -1: | |
2019 | /* Decrease starting rate, update uCode's rate table */ | |
2eb05816 | 2020 | if (low != RATE_INVALID) { |
be663ab6 | 2021 | update_lq = 1; |
0c2c8852 | 2022 | idx = low; |
be663ab6 WYG |
2023 | } |
2024 | ||
2025 | break; | |
2026 | case 1: | |
2027 | /* Increase starting rate, update uCode's rate table */ | |
2eb05816 | 2028 | if (high != RATE_INVALID) { |
be663ab6 | 2029 | update_lq = 1; |
0c2c8852 | 2030 | idx = high; |
be663ab6 WYG |
2031 | } |
2032 | ||
2033 | break; | |
2034 | case 0: | |
2035 | /* No change */ | |
2036 | default: | |
2037 | break; | |
2038 | } | |
2039 | ||
e7392364 SG |
2040 | D_RATE("choose rate scale idx %d action %d low %d " "high %d type %d\n", |
2041 | idx, scale_action, low, high, tbl->lq_type); | |
be663ab6 WYG |
2042 | |
2043 | lq_update: | |
2044 | /* Replace uCode's rate table for the destination station. */ | |
2045 | if (update_lq) | |
83007196 | 2046 | il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx, is_green); |
be663ab6 WYG |
2047 | |
2048 | /* Should we stay with this modulation mode, | |
2049 | * or search for a new one? */ | |
e7392364 | 2050 | il4965_rs_stay_in_table(lq_sta, false); |
be663ab6 WYG |
2051 | |
2052 | /* | |
2053 | * Search for new modulation mode if we're: | |
2054 | * 1) Not changing rates right now | |
2055 | * 2) Not just finishing up a search | |
2056 | * 3) Allowing a new search | |
2057 | */ | |
e7392364 SG |
2058 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && win->counter) { |
2059 | /* Save current throughput to compare with "search" throughput */ | |
be663ab6 WYG |
2060 | lq_sta->last_tpt = current_tpt; |
2061 | ||
2062 | /* Select a new "search" modulation mode to try. | |
2063 | * If one is found, set up the new "search" table. */ | |
2064 | if (is_legacy(tbl->lq_type)) | |
e7392364 | 2065 | il4965_rs_move_legacy_other(il, lq_sta, conf, sta, idx); |
be663ab6 | 2066 | else if (is_siso(tbl->lq_type)) |
e7392364 SG |
2067 | il4965_rs_move_siso_to_other(il, lq_sta, conf, sta, |
2068 | idx); | |
2069 | else /* (is_mimo2(tbl->lq_type)) */ | |
2070 | il4965_rs_move_mimo2_to_other(il, lq_sta, conf, sta, | |
2071 | idx); | |
be663ab6 WYG |
2072 | |
2073 | /* If new "search" mode was selected, set up in uCode table */ | |
2074 | if (lq_sta->search_better_tbl) { | |
2075 | /* Access the "search" table, clear its history. */ | |
2076 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
2eb05816 | 2077 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 | 2078 | il4965_rs_rate_scale_clear_win(&(tbl->win[i])); |
be663ab6 WYG |
2079 | |
2080 | /* Use new "search" start rate */ | |
0c2c8852 | 2081 | idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
be663ab6 | 2082 | |
e7392364 SG |
2083 | D_RATE("Switch current mcs: %X idx: %d\n", |
2084 | tbl->current_rate, idx); | |
2085 | il4965_rs_fill_link_cmd(il, lq_sta, tbl->current_rate); | |
83007196 | 2086 | il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false); |
be663ab6 WYG |
2087 | } else |
2088 | done_search = 1; | |
2089 | } | |
2090 | ||
2091 | if (done_search && !lq_sta->stay_in_tbl) { | |
2092 | /* If the "active" (non-search) mode was legacy, | |
2093 | * and we've tried switching antennas, | |
2094 | * but we haven't been able to try HT modes (not available), | |
2095 | * stay with best antenna legacy modulation for a while | |
2096 | * before next round of mode comparisons. */ | |
2097 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2098 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && | |
2099 | lq_sta->action_counter > tbl1->max_search) { | |
58de00a4 | 2100 | D_RATE("LQ: STAY in legacy table\n"); |
46bc8d4b | 2101 | il4965_rs_set_stay_in_table(il, 1, lq_sta); |
be663ab6 WYG |
2102 | } |
2103 | ||
2104 | /* If we're in an HT mode, and all 3 mode switch actions | |
2105 | * have been tried and compared, stay in this best modulation | |
2106 | * mode for a while before next round of mode comparisons. */ | |
2107 | if (lq_sta->enable_counter && | |
232913b5 SG |
2108 | lq_sta->action_counter >= tbl1->max_search) { |
2109 | if (lq_sta->last_tpt > IL_AGG_TPT_THREHOLD && | |
be663ab6 | 2110 | (lq_sta->tx_agg_tid_en & (1 << tid)) && |
232913b5 | 2111 | tid != MAX_TID_COUNT) { |
be663ab6 | 2112 | tid_data = |
e7392364 | 2113 | &il->stations[lq_sta->lq.sta_id].tid[tid]; |
e2ebc833 | 2114 | if (tid_data->agg.state == IL_AGG_OFF) { |
e7392364 SG |
2115 | D_RATE("try to aggregate tid %d\n", |
2116 | tid); | |
46bc8d4b | 2117 | il4965_rs_tl_turn_on_agg(il, tid, |
e7392364 | 2118 | lq_sta, sta); |
be663ab6 WYG |
2119 | } |
2120 | } | |
46bc8d4b | 2121 | il4965_rs_set_stay_in_table(il, 0, lq_sta); |
be663ab6 WYG |
2122 | } |
2123 | } | |
2124 | ||
2125 | out: | |
e7392364 SG |
2126 | tbl->current_rate = |
2127 | il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green); | |
0c2c8852 | 2128 | i = idx; |
be663ab6 WYG |
2129 | lq_sta->last_txrate_idx = i; |
2130 | } | |
2131 | ||
2132 | /** | |
e2ebc833 | 2133 | * il4965_rs_initialize_lq - Initialize a station's hardware rate table |
be663ab6 WYG |
2134 | * |
2135 | * The uCode's station table contains a table of fallback rates | |
2136 | * for automatic fallback during transmission. | |
2137 | * | |
2138 | * NOTE: This sets up a default set of values. These will be replaced later | |
2139 | * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of | |
2140 | * rc80211_simple. | |
2141 | * | |
4d69c752 SG |
2142 | * NOTE: Run C_ADD_STA command to set up station table entry, before |
2143 | * calling this function (which runs C_TX_LINK_QUALITY_CMD, | |
be663ab6 WYG |
2144 | * which requires station table entry to exist). |
2145 | */ | |
e7392364 SG |
2146 | static void |
2147 | il4965_rs_initialize_lq(struct il_priv *il, struct ieee80211_conf *conf, | |
2148 | struct ieee80211_sta *sta, struct il_lq_sta *lq_sta) | |
be663ab6 | 2149 | { |
e2ebc833 | 2150 | struct il_scale_tbl_info *tbl; |
be663ab6 WYG |
2151 | int rate_idx; |
2152 | int i; | |
2153 | u32 rate; | |
ace5af39 | 2154 | u8 use_green; |
be663ab6 WYG |
2155 | u8 active_tbl = 0; |
2156 | u8 valid_tx_ant; | |
e2ebc833 | 2157 | struct il_station_priv *sta_priv; |
be663ab6 WYG |
2158 | |
2159 | if (!sta || !lq_sta) | |
2160 | return; | |
2161 | ||
ace5af39 | 2162 | use_green = il4965_rs_use_green(il, sta); |
be663ab6 | 2163 | sta_priv = (void *)sta->drv_priv; |
be663ab6 WYG |
2164 | |
2165 | i = lq_sta->last_txrate_idx; | |
2166 | ||
46bc8d4b | 2167 | valid_tx_ant = il->hw_params.valid_tx_ant; |
be663ab6 WYG |
2168 | |
2169 | if (!lq_sta->search_better_tbl) | |
2170 | active_tbl = lq_sta->active_tbl; | |
2171 | else | |
2172 | active_tbl = 1 - lq_sta->active_tbl; | |
2173 | ||
2174 | tbl = &(lq_sta->lq_info[active_tbl]); | |
2175 | ||
2eb05816 | 2176 | if (i < 0 || i >= RATE_COUNT) |
be663ab6 WYG |
2177 | i = 0; |
2178 | ||
d2ddf621 | 2179 | rate = il_rates[i].plcp; |
e2ebc833 | 2180 | tbl->ant_type = il4965_first_antenna(valid_tx_ant); |
be663ab6 WYG |
2181 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; |
2182 | ||
e2ebc833 | 2183 | if (i >= IL_FIRST_CCK_RATE && i <= IL_LAST_CCK_RATE) |
be663ab6 WYG |
2184 | rate |= RATE_MCS_CCK_MSK; |
2185 | ||
46bc8d4b | 2186 | il4965_rs_get_tbl_info_from_mcs(rate, il->band, tbl, &rate_idx); |
e2ebc833 SG |
2187 | if (!il4965_rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2188 | il4965_rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
be663ab6 | 2189 | |
46bc8d4b | 2190 | rate = il4965_rate_n_flags_from_tbl(il, tbl, rate_idx, use_green); |
be663ab6 | 2191 | tbl->current_rate = rate; |
e2ebc833 SG |
2192 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
2193 | il4965_rs_fill_link_cmd(NULL, lq_sta, rate); | |
46bc8d4b | 2194 | il->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
83007196 | 2195 | il_send_lq_cmd(il, &lq_sta->lq, CMD_SYNC, true); |
be663ab6 WYG |
2196 | } |
2197 | ||
2198 | static void | |
46bc8d4b | 2199 | il4965_rs_get_rate(void *il_r, struct ieee80211_sta *sta, void *il_sta, |
e7392364 | 2200 | struct ieee80211_tx_rate_control *txrc) |
be663ab6 WYG |
2201 | { |
2202 | ||
2203 | struct sk_buff *skb = txrc->skb; | |
2204 | struct ieee80211_supported_band *sband = txrc->sband; | |
46bc8d4b | 2205 | struct il_priv *il __maybe_unused = (struct il_priv *)il_r; |
be663ab6 | 2206 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
46bc8d4b | 2207 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 WYG |
2208 | int rate_idx; |
2209 | ||
58de00a4 | 2210 | D_RATE("rate scale calculate new rate for skb\n"); |
be663ab6 WYG |
2211 | |
2212 | /* Get max rate if user set max rate */ | |
2213 | if (lq_sta) { | |
2214 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
232913b5 SG |
2215 | if (sband->band == IEEE80211_BAND_5GHZ && |
2216 | lq_sta->max_rate_idx != -1) | |
e2ebc833 | 2217 | lq_sta->max_rate_idx += IL_FIRST_OFDM_RATE; |
232913b5 | 2218 | if (lq_sta->max_rate_idx < 0 || |
2eb05816 | 2219 | lq_sta->max_rate_idx >= RATE_COUNT) |
be663ab6 WYG |
2220 | lq_sta->max_rate_idx = -1; |
2221 | } | |
2222 | ||
2223 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
2224 | if (lq_sta && !lq_sta->drv) { | |
58de00a4 | 2225 | D_RATE("Rate scaling not initialized yet.\n"); |
46bc8d4b | 2226 | il_sta = NULL; |
be663ab6 WYG |
2227 | } |
2228 | ||
2229 | /* Send management frames and NO_ACK data using lowest rate. */ | |
46bc8d4b | 2230 | if (rate_control_send_low(sta, il_sta, txrc)) |
be663ab6 WYG |
2231 | return; |
2232 | ||
0c34861e GD |
2233 | if (!lq_sta) |
2234 | return; | |
2235 | ||
e7392364 | 2236 | rate_idx = lq_sta->last_txrate_idx; |
be663ab6 WYG |
2237 | |
2238 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { | |
e2ebc833 | 2239 | rate_idx -= IL_FIRST_OFDM_RATE; |
0c2c8852 | 2240 | /* 6M and 9M shared same MCS idx */ |
be663ab6 | 2241 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; |
e2ebc833 | 2242 | if (il4965_rs_extract_rate(lq_sta->last_rate_n_flags) >= |
e7392364 | 2243 | RATE_MIMO2_6M_PLCP) |
2d09b062 | 2244 | rate_idx = rate_idx + MCS_IDX_PER_STREAM; |
be663ab6 WYG |
2245 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; |
2246 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2247 | info->control.rates[0].flags |= | |
e7392364 | 2248 | IEEE80211_TX_RC_SHORT_GI; |
be663ab6 WYG |
2249 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) |
2250 | info->control.rates[0].flags |= | |
e7392364 | 2251 | IEEE80211_TX_RC_DUP_DATA; |
be663ab6 WYG |
2252 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
2253 | info->control.rates[0].flags |= | |
e7392364 | 2254 | IEEE80211_TX_RC_40_MHZ_WIDTH; |
be663ab6 WYG |
2255 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) |
2256 | info->control.rates[0].flags |= | |
e7392364 | 2257 | IEEE80211_TX_RC_GREEN_FIELD; |
be663ab6 WYG |
2258 | } else { |
2259 | /* Check for invalid rates */ | |
2eb05816 | 2260 | if (rate_idx < 0 || rate_idx >= RATE_COUNT_LEGACY || |
232913b5 SG |
2261 | (sband->band == IEEE80211_BAND_5GHZ && |
2262 | rate_idx < IL_FIRST_OFDM_RATE)) | |
be663ab6 | 2263 | rate_idx = rate_lowest_index(sband, sta); |
0c2c8852 | 2264 | /* On valid 5 GHz rate, adjust idx */ |
be663ab6 | 2265 | else if (sband->band == IEEE80211_BAND_5GHZ) |
e2ebc833 | 2266 | rate_idx -= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2267 | info->control.rates[0].flags = 0; |
2268 | } | |
2269 | info->control.rates[0].idx = rate_idx; | |
a8cf0194 | 2270 | info->control.rates[0].count = 1; |
be663ab6 WYG |
2271 | } |
2272 | ||
e7392364 SG |
2273 | static void * |
2274 | il4965_rs_alloc_sta(void *il_rate, struct ieee80211_sta *sta, gfp_t gfp) | |
be663ab6 | 2275 | { |
e2ebc833 | 2276 | struct il_station_priv *sta_priv = |
e7392364 | 2277 | (struct il_station_priv *)sta->drv_priv; |
46bc8d4b | 2278 | struct il_priv *il; |
be663ab6 | 2279 | |
46bc8d4b | 2280 | il = (struct il_priv *)il_rate; |
6ce1dc45 | 2281 | D_RATE("create station rate scale win\n"); |
be663ab6 | 2282 | |
3e4b0655 | 2283 | return &sta_priv->lq_sta; |
be663ab6 WYG |
2284 | } |
2285 | ||
2286 | /* | |
2287 | * Called after adding a new station to initialize rate scaling | |
2288 | */ | |
2289 | void | |
e7392364 | 2290 | il4965_rs_rate_init(struct il_priv *il, struct ieee80211_sta *sta, u8 sta_id) |
be663ab6 WYG |
2291 | { |
2292 | int i, j; | |
46bc8d4b SG |
2293 | struct ieee80211_hw *hw = il->hw; |
2294 | struct ieee80211_conf *conf = &il->hw->conf; | |
be663ab6 | 2295 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e2ebc833 SG |
2296 | struct il_station_priv *sta_priv; |
2297 | struct il_lq_sta *lq_sta; | |
be663ab6 WYG |
2298 | struct ieee80211_supported_band *sband; |
2299 | ||
e7392364 | 2300 | sta_priv = (struct il_station_priv *)sta->drv_priv; |
be663ab6 | 2301 | lq_sta = &sta_priv->lq_sta; |
675a0b04 | 2302 | sband = hw->wiphy->bands[conf->chandef.chan->band]; |
be663ab6 | 2303 | |
be663ab6 WYG |
2304 | lq_sta->lq.sta_id = sta_id; |
2305 | ||
2306 | for (j = 0; j < LQ_SIZE; j++) | |
2eb05816 | 2307 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 SG |
2308 | il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j]. |
2309 | win[i]); | |
be663ab6 WYG |
2310 | |
2311 | lq_sta->flush_timer = 0; | |
2312 | lq_sta->supp_rates = sta->supp_rates[sband->band]; | |
2313 | for (j = 0; j < LQ_SIZE; j++) | |
2eb05816 | 2314 | for (i = 0; i < RATE_COUNT; i++) |
e7392364 SG |
2315 | il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j]. |
2316 | win[i]); | |
be663ab6 | 2317 | |
e7392364 SG |
2318 | D_RATE("LQ:" "*** rate scale station global init for station %d ***\n", |
2319 | sta_id); | |
be663ab6 WYG |
2320 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2321 | * the lowest or the highest rate.. Could consider using RSSI from | |
2322 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2323 | * after assoc.. */ | |
2324 | ||
2325 | lq_sta->is_dup = 0; | |
2326 | lq_sta->max_rate_idx = -1; | |
e2ebc833 | 2327 | lq_sta->missed_rate_counter = IL_MISSED_RATE_MAX; |
1c03c462 | 2328 | lq_sta->is_green = il4965_rs_use_green(il, sta); |
46bc8d4b SG |
2329 | lq_sta->active_legacy_rate = il->active_rate & ~(0x1000); |
2330 | lq_sta->band = il->band; | |
be663ab6 WYG |
2331 | /* |
2332 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2333 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2334 | */ | |
2335 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; | |
2336 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
e7392364 | 2337 | lq_sta->active_siso_rate &= ~((u16) 0x2); |
e2ebc833 | 2338 | lq_sta->active_siso_rate <<= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2339 | |
2340 | /* Same here */ | |
2341 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; | |
2342 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
e7392364 | 2343 | lq_sta->active_mimo2_rate &= ~((u16) 0x2); |
e2ebc833 | 2344 | lq_sta->active_mimo2_rate <<= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2345 | |
2346 | /* These values will be overridden later */ | |
2347 | lq_sta->lq.general_params.single_stream_ant_msk = | |
e7392364 | 2348 | il4965_first_antenna(il->hw_params.valid_tx_ant); |
be663ab6 | 2349 | lq_sta->lq.general_params.dual_stream_ant_msk = |
e7392364 SG |
2350 | il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params. |
2351 | valid_tx_ant); | |
be663ab6 WYG |
2352 | if (!lq_sta->lq.general_params.dual_stream_ant_msk) { |
2353 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
46bc8d4b | 2354 | } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { |
be663ab6 | 2355 | lq_sta->lq.general_params.dual_stream_ant_msk = |
e7392364 | 2356 | il->hw_params.valid_tx_ant; |
be663ab6 WYG |
2357 | } |
2358 | ||
2359 | /* as default allow aggregation for all tids */ | |
e2ebc833 | 2360 | lq_sta->tx_agg_tid_en = IL_AGG_ALL_TID; |
46bc8d4b | 2361 | lq_sta->drv = il; |
be663ab6 WYG |
2362 | |
2363 | /* Set last_txrate_idx to lowest rate */ | |
2364 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2365 | if (sband->band == IEEE80211_BAND_5GHZ) | |
e2ebc833 | 2366 | lq_sta->last_txrate_idx += IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2367 | lq_sta->is_agg = 0; |
2368 | ||
2369 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2370 | lq_sta->dbg_fixed_rate = 0; | |
2371 | #endif | |
2372 | ||
46bc8d4b | 2373 | il4965_rs_initialize_lq(il, conf, sta, lq_sta); |
be663ab6 WYG |
2374 | } |
2375 | ||
e7392364 SG |
2376 | static void |
2377 | il4965_rs_fill_link_cmd(struct il_priv *il, struct il_lq_sta *lq_sta, | |
2378 | u32 new_rate) | |
be663ab6 | 2379 | { |
e2ebc833 | 2380 | struct il_scale_tbl_info tbl_type; |
0c2c8852 | 2381 | int idx = 0; |
be663ab6 WYG |
2382 | int rate_idx; |
2383 | int repeat_rate = 0; | |
2384 | u8 ant_toggle_cnt = 0; | |
2385 | u8 use_ht_possible = 1; | |
2386 | u8 valid_tx_ant = 0; | |
e2ebc833 | 2387 | struct il_link_quality_cmd *lq_cmd = &lq_sta->lq; |
be663ab6 | 2388 | |
0c2c8852 SG |
2389 | /* Override starting rate (idx 0) if needed for debug purposes */ |
2390 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); | |
be663ab6 WYG |
2391 | |
2392 | /* Interpret new_rate (rate_n_flags) */ | |
e7392364 SG |
2393 | il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
2394 | &rate_idx); | |
be663ab6 WYG |
2395 | |
2396 | /* How many times should we repeat the initial rate? */ | |
2397 | if (is_legacy(tbl_type.lq_type)) { | |
2398 | ant_toggle_cnt = 1; | |
e2ebc833 | 2399 | repeat_rate = IL_NUMBER_TRY; |
be663ab6 | 2400 | } else { |
e2ebc833 | 2401 | repeat_rate = IL_HT_NUMBER_TRY; |
be663ab6 WYG |
2402 | } |
2403 | ||
2404 | lq_cmd->general_params.mimo_delimiter = | |
e7392364 | 2405 | is_mimo(tbl_type.lq_type) ? 1 : 0; |
be663ab6 | 2406 | |
0c2c8852 SG |
2407 | /* Fill 1st table entry (idx 0) */ |
2408 | lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate); | |
be663ab6 | 2409 | |
e2ebc833 | 2410 | if (il4965_num_of_ant(tbl_type.ant_type) == 1) { |
be663ab6 | 2411 | lq_cmd->general_params.single_stream_ant_msk = |
e7392364 | 2412 | tbl_type.ant_type; |
e2ebc833 | 2413 | } else if (il4965_num_of_ant(tbl_type.ant_type) == 2) { |
e7392364 SG |
2414 | lq_cmd->general_params.dual_stream_ant_msk = tbl_type.ant_type; |
2415 | } | |
2416 | /* otherwise we don't modify the existing value */ | |
0c2c8852 | 2417 | idx++; |
be663ab6 | 2418 | repeat_rate--; |
46bc8d4b SG |
2419 | if (il) |
2420 | valid_tx_ant = il->hw_params.valid_tx_ant; | |
be663ab6 WYG |
2421 | |
2422 | /* Fill rest of rate table */ | |
0c2c8852 | 2423 | while (idx < LINK_QUAL_MAX_RETRY_NUM) { |
be663ab6 | 2424 | /* Repeat initial/next rate. |
e2ebc833 SG |
2425 | * For legacy IL_NUMBER_TRY == 1, this loop will not execute. |
2426 | * For HT IL_HT_NUMBER_TRY == 3, this executes twice. */ | |
0c2c8852 | 2427 | while (repeat_rate > 0 && idx < LINK_QUAL_MAX_RETRY_NUM) { |
be663ab6 WYG |
2428 | if (is_legacy(tbl_type.lq_type)) { |
2429 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) | |
2430 | ant_toggle_cnt++; | |
46bc8d4b | 2431 | else if (il && |
e2ebc833 | 2432 | il4965_rs_toggle_antenna(valid_tx_ant, |
e7392364 SG |
2433 | &new_rate, |
2434 | &tbl_type)) | |
be663ab6 WYG |
2435 | ant_toggle_cnt = 1; |
2436 | } | |
2437 | ||
2438 | /* Override next rate if needed for debug purposes */ | |
0c2c8852 | 2439 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); |
be663ab6 WYG |
2440 | |
2441 | /* Fill next table entry */ | |
0c2c8852 | 2442 | lq_cmd->rs_table[idx].rate_n_flags = |
e7392364 | 2443 | cpu_to_le32(new_rate); |
be663ab6 | 2444 | repeat_rate--; |
0c2c8852 | 2445 | idx++; |
be663ab6 WYG |
2446 | } |
2447 | ||
e7392364 SG |
2448 | il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
2449 | &tbl_type, &rate_idx); | |
be663ab6 WYG |
2450 | |
2451 | /* Indicate to uCode which entries might be MIMO. | |
2452 | * If initial rate was MIMO, this will finally end up | |
e2ebc833 | 2453 | * as (IL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ |
be663ab6 | 2454 | if (is_mimo(tbl_type.lq_type)) |
0c2c8852 | 2455 | lq_cmd->general_params.mimo_delimiter = idx; |
be663ab6 WYG |
2456 | |
2457 | /* Get next rate */ | |
e7392364 SG |
2458 | new_rate = |
2459 | il4965_rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, | |
be663ab6 WYG |
2460 | use_ht_possible); |
2461 | ||
2462 | /* How many times should we repeat the next rate? */ | |
2463 | if (is_legacy(tbl_type.lq_type)) { | |
2464 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) | |
2465 | ant_toggle_cnt++; | |
46bc8d4b | 2466 | else if (il && |
e2ebc833 | 2467 | il4965_rs_toggle_antenna(valid_tx_ant, |
e7392364 | 2468 | &new_rate, &tbl_type)) |
be663ab6 WYG |
2469 | ant_toggle_cnt = 1; |
2470 | ||
e2ebc833 | 2471 | repeat_rate = IL_NUMBER_TRY; |
be663ab6 | 2472 | } else { |
e2ebc833 | 2473 | repeat_rate = IL_HT_NUMBER_TRY; |
be663ab6 WYG |
2474 | } |
2475 | ||
2476 | /* Don't allow HT rates after next pass. | |
e2ebc833 | 2477 | * il4965_rs_get_lower_rate() will change type to LQ_A or LQ_G. */ |
be663ab6 WYG |
2478 | use_ht_possible = 0; |
2479 | ||
2480 | /* Override next rate if needed for debug purposes */ | |
0c2c8852 | 2481 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); |
be663ab6 WYG |
2482 | |
2483 | /* Fill next table entry */ | |
0c2c8852 | 2484 | lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate); |
be663ab6 | 2485 | |
0c2c8852 | 2486 | idx++; |
be663ab6 WYG |
2487 | repeat_rate--; |
2488 | } | |
2489 | ||
2490 | lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
2491 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; | |
2492 | ||
2493 | lq_cmd->agg_params.agg_time_limit = | |
e7392364 | 2494 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); |
be663ab6 WYG |
2495 | } |
2496 | ||
e7392364 SG |
2497 | static void * |
2498 | il4965_rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) | |
be663ab6 WYG |
2499 | { |
2500 | return hw->priv; | |
2501 | } | |
e7392364 | 2502 | |
be663ab6 | 2503 | /* rate scale requires free function to be implemented */ |
e7392364 SG |
2504 | static void |
2505 | il4965_rs_free(void *il_rate) | |
be663ab6 WYG |
2506 | { |
2507 | return; | |
2508 | } | |
2509 | ||
e7392364 SG |
2510 | static void |
2511 | il4965_rs_free_sta(void *il_r, struct ieee80211_sta *sta, void *il_sta) | |
be663ab6 | 2512 | { |
46bc8d4b | 2513 | struct il_priv *il __maybe_unused = il_r; |
be663ab6 | 2514 | |
58de00a4 SG |
2515 | D_RATE("enter\n"); |
2516 | D_RATE("leave\n"); | |
be663ab6 WYG |
2517 | } |
2518 | ||
be663ab6 | 2519 | #ifdef CONFIG_MAC80211_DEBUGFS |
e7392364 SG |
2520 | |
2521 | static void | |
2522 | il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx) | |
be663ab6 | 2523 | { |
46bc8d4b | 2524 | struct il_priv *il; |
be663ab6 WYG |
2525 | u8 valid_tx_ant; |
2526 | u8 ant_sel_tx; | |
2527 | ||
46bc8d4b SG |
2528 | il = lq_sta->drv; |
2529 | valid_tx_ant = il->hw_params.valid_tx_ant; | |
be663ab6 WYG |
2530 | if (lq_sta->dbg_fixed_rate) { |
2531 | ant_sel_tx = | |
e7392364 SG |
2532 | ((lq_sta-> |
2533 | dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >> | |
2534 | RATE_MCS_ANT_POS); | |
be663ab6 WYG |
2535 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { |
2536 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
58de00a4 | 2537 | D_RATE("Fixed rate ON\n"); |
be663ab6 WYG |
2538 | } else { |
2539 | lq_sta->dbg_fixed_rate = 0; | |
e7392364 SG |
2540 | IL_ERR |
2541 | ("Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
2542 | ant_sel_tx, valid_tx_ant); | |
58de00a4 | 2543 | D_RATE("Fixed rate OFF\n"); |
be663ab6 WYG |
2544 | } |
2545 | } else { | |
58de00a4 | 2546 | D_RATE("Fixed rate OFF\n"); |
be663ab6 WYG |
2547 | } |
2548 | } | |
2549 | ||
e7392364 SG |
2550 | static ssize_t |
2551 | il4965_rs_sta_dbgfs_scale_table_write(struct file *file, | |
1722f8e1 SG |
2552 | const char __user *user_buf, |
2553 | size_t count, loff_t *ppos) | |
be663ab6 | 2554 | { |
e2ebc833 | 2555 | struct il_lq_sta *lq_sta = file->private_data; |
46bc8d4b | 2556 | struct il_priv *il; |
be663ab6 | 2557 | char buf[64]; |
8220ba3e | 2558 | size_t buf_size; |
be663ab6 | 2559 | u32 parsed_rate; |
be663ab6 | 2560 | |
46bc8d4b | 2561 | il = lq_sta->drv; |
be663ab6 | 2562 | memset(buf, 0, sizeof(buf)); |
e7392364 | 2563 | buf_size = min(count, sizeof(buf) - 1); |
be663ab6 WYG |
2564 | if (copy_from_user(buf, user_buf, buf_size)) |
2565 | return -EFAULT; | |
2566 | ||
2567 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
2568 | lq_sta->dbg_fixed_rate = parsed_rate; | |
2569 | else | |
2570 | lq_sta->dbg_fixed_rate = 0; | |
2571 | ||
2572 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
e7392364 SG |
2573 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ |
2574 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
be663ab6 | 2575 | |
e7392364 SG |
2576 | D_RATE("sta_id %d rate 0x%X\n", lq_sta->lq.sta_id, |
2577 | lq_sta->dbg_fixed_rate); | |
be663ab6 WYG |
2578 | |
2579 | if (lq_sta->dbg_fixed_rate) { | |
e2ebc833 | 2580 | il4965_rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
83007196 | 2581 | il_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC, false); |
be663ab6 WYG |
2582 | } |
2583 | ||
2584 | return count; | |
2585 | } | |
2586 | ||
e7392364 | 2587 | static ssize_t |
1722f8e1 SG |
2588 | il4965_rs_sta_dbgfs_scale_table_read(struct file *file, char __user *user_buf, |
2589 | size_t count, loff_t *ppos) | |
be663ab6 WYG |
2590 | { |
2591 | char *buff; | |
2592 | int desc = 0; | |
2593 | int i = 0; | |
0c2c8852 | 2594 | int idx = 0; |
be663ab6 WYG |
2595 | ssize_t ret; |
2596 | ||
e2ebc833 | 2597 | struct il_lq_sta *lq_sta = file->private_data; |
46bc8d4b | 2598 | struct il_priv *il; |
e2ebc833 | 2599 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
be663ab6 | 2600 | |
46bc8d4b | 2601 | il = lq_sta->drv; |
be663ab6 WYG |
2602 | buff = kmalloc(1024, GFP_KERNEL); |
2603 | if (!buff) | |
2604 | return -ENOMEM; | |
2605 | ||
e7392364 SG |
2606 | desc += sprintf(buff + desc, "sta_id %d\n", lq_sta->lq.sta_id); |
2607 | desc += | |
2608 | sprintf(buff + desc, "failed=%d success=%d rate=0%X\n", | |
2609 | lq_sta->total_failed, lq_sta->total_success, | |
2610 | lq_sta->active_legacy_rate); | |
2611 | desc += | |
2612 | sprintf(buff + desc, "fixed rate 0x%X\n", lq_sta->dbg_fixed_rate); | |
2613 | desc += | |
2614 | sprintf(buff + desc, "valid_tx_ant %s%s%s\n", | |
2615 | (il->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", | |
2616 | (il->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2617 | (il->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
2618 | desc += | |
2619 | sprintf(buff + desc, "lq type %s\n", | |
2620 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
be663ab6 | 2621 | if (is_Ht(tbl->lq_type)) { |
e7392364 SG |
2622 | desc += |
2623 | sprintf(buff + desc, " %s", | |
2624 | (is_siso(tbl->lq_type)) ? "SISO" : "MIMO2"); | |
2625 | desc += | |
2626 | sprintf(buff + desc, " %s", | |
2627 | (tbl->is_ht40) ? "40MHz" : "20MHz"); | |
2628 | desc += | |
2629 | sprintf(buff + desc, " %s %s %s\n", | |
2630 | (tbl->is_SGI) ? "SGI" : "", | |
2631 | (lq_sta->is_green) ? "GF enabled" : "", | |
2632 | (lq_sta->is_agg) ? "AGG on" : ""); | |
be663ab6 | 2633 | } |
e7392364 SG |
2634 | desc += |
2635 | sprintf(buff + desc, "last tx rate=0x%X\n", | |
2636 | lq_sta->last_rate_n_flags); | |
2637 | desc += | |
2638 | sprintf(buff + desc, | |
2639 | "general:" "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
2640 | lq_sta->lq.general_params.flags, | |
2641 | lq_sta->lq.general_params.mimo_delimiter, | |
2642 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2643 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
2644 | ||
2645 | desc += | |
2646 | sprintf(buff + desc, | |
2647 | "agg:" | |
2648 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2649 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), | |
2650 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2651 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
2652 | ||
2653 | desc += | |
2654 | sprintf(buff + desc, | |
2655 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2656 | lq_sta->lq.general_params.start_rate_idx[0], | |
2657 | lq_sta->lq.general_params.start_rate_idx[1], | |
2658 | lq_sta->lq.general_params.start_rate_idx[2], | |
2659 | lq_sta->lq.general_params.start_rate_idx[3]); | |
be663ab6 WYG |
2660 | |
2661 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
e7392364 SG |
2662 | idx = |
2663 | il4965_hwrate_to_plcp_idx(le32_to_cpu | |
2664 | (lq_sta->lq.rs_table[i]. | |
2665 | rate_n_flags)); | |
be663ab6 | 2666 | if (is_legacy(tbl->lq_type)) { |
e7392364 SG |
2667 | desc += |
2668 | sprintf(buff + desc, " rate[%d] 0x%X %smbps\n", i, | |
2669 | le32_to_cpu(lq_sta->lq.rs_table[i]. | |
2670 | rate_n_flags), | |
2671 | il_rate_mcs[idx].mbps); | |
be663ab6 | 2672 | } else { |
e7392364 SG |
2673 | desc += |
2674 | sprintf(buff + desc, " rate[%d] 0x%X %smbps (%s)\n", | |
2675 | i, | |
2676 | le32_to_cpu(lq_sta->lq.rs_table[i]. | |
2677 | rate_n_flags), | |
2678 | il_rate_mcs[idx].mbps, | |
2679 | il_rate_mcs[idx].mcs); | |
be663ab6 WYG |
2680 | } |
2681 | } | |
2682 | ||
2683 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2684 | kfree(buff); | |
2685 | return ret; | |
2686 | } | |
2687 | ||
2688 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
e2ebc833 SG |
2689 | .write = il4965_rs_sta_dbgfs_scale_table_write, |
2690 | .read = il4965_rs_sta_dbgfs_scale_table_read, | |
234e3405 | 2691 | .open = simple_open, |
be663ab6 WYG |
2692 | .llseek = default_llseek, |
2693 | }; | |
e7392364 SG |
2694 | |
2695 | static ssize_t | |
1722f8e1 SG |
2696 | il4965_rs_sta_dbgfs_stats_table_read(struct file *file, char __user *user_buf, |
2697 | size_t count, loff_t *ppos) | |
be663ab6 WYG |
2698 | { |
2699 | char *buff; | |
2700 | int desc = 0; | |
2701 | int i, j; | |
2702 | ssize_t ret; | |
2703 | ||
e2ebc833 | 2704 | struct il_lq_sta *lq_sta = file->private_data; |
be663ab6 WYG |
2705 | |
2706 | buff = kmalloc(1024, GFP_KERNEL); | |
2707 | if (!buff) | |
2708 | return -ENOMEM; | |
2709 | ||
2710 | for (i = 0; i < LQ_SIZE; i++) { | |
e7392364 SG |
2711 | desc += |
2712 | sprintf(buff + desc, | |
2713 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
2714 | "rate=0x%X\n", lq_sta->active_tbl == i ? "*" : "x", | |
2715 | lq_sta->lq_info[i].lq_type, | |
2716 | lq_sta->lq_info[i].is_SGI, | |
2717 | lq_sta->lq_info[i].is_ht40, | |
2718 | lq_sta->lq_info[i].is_dup, lq_sta->is_green, | |
2719 | lq_sta->lq_info[i].current_rate); | |
2eb05816 | 2720 | for (j = 0; j < RATE_COUNT; j++) { |
e7392364 SG |
2721 | desc += |
2722 | sprintf(buff + desc, | |
2723 | "counter=%d success=%d %%=%d\n", | |
2724 | lq_sta->lq_info[i].win[j].counter, | |
2725 | lq_sta->lq_info[i].win[j].success_counter, | |
2726 | lq_sta->lq_info[i].win[j].success_ratio); | |
be663ab6 WYG |
2727 | } |
2728 | } | |
2729 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2730 | kfree(buff); | |
2731 | return ret; | |
2732 | } | |
2733 | ||
2734 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
e2ebc833 | 2735 | .read = il4965_rs_sta_dbgfs_stats_table_read, |
234e3405 | 2736 | .open = simple_open, |
be663ab6 WYG |
2737 | .llseek = default_llseek, |
2738 | }; | |
2739 | ||
e7392364 SG |
2740 | static ssize_t |
2741 | il4965_rs_sta_dbgfs_rate_scale_data_read(struct file *file, | |
1722f8e1 SG |
2742 | char __user *user_buf, size_t count, |
2743 | loff_t *ppos) | |
be663ab6 WYG |
2744 | { |
2745 | char buff[120]; | |
2746 | int desc = 0; | |
e2ebc833 | 2747 | struct il_lq_sta *lq_sta = file->private_data; |
e2ebc833 | 2748 | struct il_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; |
be663ab6 | 2749 | |
be663ab6 | 2750 | if (is_Ht(tbl->lq_type)) |
e7392364 SG |
2751 | desc += |
2752 | sprintf(buff + desc, "Bit Rate= %d Mb/s\n", | |
2753 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
be663ab6 | 2754 | else |
e7392364 SG |
2755 | desc += |
2756 | sprintf(buff + desc, "Bit Rate= %d Mb/s\n", | |
2757 | il_rates[lq_sta->last_txrate_idx].ieee >> 1); | |
be663ab6 | 2758 | |
e3a2c775 | 2759 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
be663ab6 WYG |
2760 | } |
2761 | ||
2762 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
e2ebc833 | 2763 | .read = il4965_rs_sta_dbgfs_rate_scale_data_read, |
234e3405 | 2764 | .open = simple_open, |
be663ab6 WYG |
2765 | .llseek = default_llseek, |
2766 | }; | |
2767 | ||
e7392364 SG |
2768 | static void |
2769 | il4965_rs_add_debugfs(void *il, void *il_sta, struct dentry *dir) | |
be663ab6 | 2770 | { |
46bc8d4b | 2771 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 | 2772 | lq_sta->rs_sta_dbgfs_scale_table_file = |
e7392364 | 2773 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
be663ab6 WYG |
2774 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2775 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
e7392364 SG |
2776 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, lq_sta, |
2777 | &rs_sta_dbgfs_stats_table_ops); | |
be663ab6 | 2778 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = |
e7392364 SG |
2779 | debugfs_create_file("rate_scale_data", S_IRUSR, dir, lq_sta, |
2780 | &rs_sta_dbgfs_rate_scale_data_ops); | |
be663ab6 | 2781 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
e7392364 SG |
2782 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, |
2783 | &lq_sta->tx_agg_tid_en); | |
be663ab6 WYG |
2784 | |
2785 | } | |
2786 | ||
e7392364 SG |
2787 | static void |
2788 | il4965_rs_remove_debugfs(void *il, void *il_sta) | |
be663ab6 | 2789 | { |
46bc8d4b | 2790 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 WYG |
2791 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2792 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
2793 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); | |
2794 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); | |
2795 | } | |
2796 | #endif | |
2797 | ||
2798 | /* | |
2799 | * Initialization of rate scaling information is done by driver after | |
2800 | * the station is added. Since mac80211 calls this function before a | |
2801 | * station is added we ignore it. | |
2802 | */ | |
2803 | static void | |
46bc8d4b | 2804 | il4965_rs_rate_init_stub(void *il_r, struct ieee80211_supported_band *sband, |
3de805cf | 2805 | struct cfg80211_chan_def *chandef, |
46bc8d4b | 2806 | struct ieee80211_sta *sta, void *il_sta) |
be663ab6 WYG |
2807 | { |
2808 | } | |
e7392364 | 2809 | |
631ad703 | 2810 | static const struct rate_control_ops rs_4965_ops = { |
d3175167 | 2811 | .name = IL4965_RS_NAME, |
e2ebc833 SG |
2812 | .tx_status = il4965_rs_tx_status, |
2813 | .get_rate = il4965_rs_get_rate, | |
2814 | .rate_init = il4965_rs_rate_init_stub, | |
2815 | .alloc = il4965_rs_alloc, | |
2816 | .free = il4965_rs_free, | |
2817 | .alloc_sta = il4965_rs_alloc_sta, | |
2818 | .free_sta = il4965_rs_free_sta, | |
be663ab6 | 2819 | #ifdef CONFIG_MAC80211_DEBUGFS |
e2ebc833 SG |
2820 | .add_sta_debugfs = il4965_rs_add_debugfs, |
2821 | .remove_sta_debugfs = il4965_rs_remove_debugfs, | |
be663ab6 WYG |
2822 | #endif |
2823 | }; | |
2824 | ||
e7392364 SG |
2825 | int |
2826 | il4965_rate_control_register(void) | |
be663ab6 | 2827 | { |
be663ab6 WYG |
2828 | return ieee80211_rate_control_register(&rs_4965_ops); |
2829 | } | |
2830 | ||
e7392364 SG |
2831 | void |
2832 | il4965_rate_control_unregister(void) | |
be663ab6 WYG |
2833 | { |
2834 | ieee80211_rate_control_unregister(&rs_4965_ops); | |
2835 | } |