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be663ab6 WYG |
1 | /****************************************************************************** |
2 | * | |
3 | * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * Intel Linux Wireless <ilw@linux.intel.com> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/slab.h> | |
be663ab6 WYG |
30 | #include <net/mac80211.h> |
31 | ||
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
38 | #include "iwl-dev.h" | |
39 | #include "iwl-sta.h" | |
40 | #include "iwl-core.h" | |
41 | #include "iwl-4965.h" | |
42 | ||
d3175167 | 43 | #define IL4965_RS_NAME "iwl-4965-rs" |
be663ab6 WYG |
44 | |
45 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 | |
e2ebc833 SG |
46 | #define IL_NUMBER_TRY 1 |
47 | #define IL_HT_NUMBER_TRY 3 | |
be663ab6 | 48 | |
6ce1dc45 | 49 | #define IL_RATE_MAX_WINDOW 62 /* # tx in history win */ |
e2ebc833 SG |
50 | #define IL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ |
51 | #define IL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
be663ab6 WYG |
52 | |
53 | /* max allowed rate miss before sync LQ cmd */ | |
e2ebc833 | 54 | #define IL_MISSED_RATE_MAX 15 |
be663ab6 | 55 | /* max time to accum history 2 seconds */ |
e2ebc833 | 56 | #define IL_RATE_SCALE_FLUSH_INTVL (3*HZ) |
be663ab6 WYG |
57 | |
58 | static u8 rs_ht_to_legacy[] = { | |
e2ebc833 SG |
59 | IL_RATE_6M_INDEX, IL_RATE_6M_INDEX, |
60 | IL_RATE_6M_INDEX, IL_RATE_6M_INDEX, | |
61 | IL_RATE_6M_INDEX, | |
62 | IL_RATE_6M_INDEX, IL_RATE_9M_INDEX, | |
63 | IL_RATE_12M_INDEX, IL_RATE_18M_INDEX, | |
64 | IL_RATE_24M_INDEX, IL_RATE_36M_INDEX, | |
65 | IL_RATE_48M_INDEX, IL_RATE_54M_INDEX | |
be663ab6 WYG |
66 | }; |
67 | ||
68 | static const u8 ant_toggle_lookup[] = { | |
69 | /*ANT_NONE -> */ ANT_NONE, | |
70 | /*ANT_A -> */ ANT_B, | |
71 | /*ANT_B -> */ ANT_C, | |
72 | /*ANT_AB -> */ ANT_BC, | |
73 | /*ANT_C -> */ ANT_A, | |
74 | /*ANT_AC -> */ ANT_AB, | |
75 | /*ANT_BC -> */ ANT_AC, | |
76 | /*ANT_ABC -> */ ANT_ABC, | |
77 | }; | |
78 | ||
e2ebc833 SG |
79 | #define IL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ |
80 | [IL_RATE_##r##M_INDEX] = { IL_RATE_##r##M_PLCP, \ | |
81 | IL_RATE_SISO_##s##M_PLCP, \ | |
82 | IL_RATE_MIMO2_##s##M_PLCP,\ | |
83 | IL_RATE_##r##M_IEEE, \ | |
84 | IL_RATE_##ip##M_INDEX, \ | |
85 | IL_RATE_##in##M_INDEX, \ | |
86 | IL_RATE_##rp##M_INDEX, \ | |
87 | IL_RATE_##rn##M_INDEX, \ | |
88 | IL_RATE_##pp##M_INDEX, \ | |
89 | IL_RATE_##np##M_INDEX } | |
be663ab6 WYG |
90 | |
91 | /* | |
92 | * Parameter order: | |
93 | * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate | |
94 | * | |
95 | * If there isn't a valid next or previous rate then INV is used which | |
e2ebc833 | 96 | * maps to IL_RATE_INVALID |
be663ab6 WYG |
97 | * |
98 | */ | |
d2ddf621 | 99 | const struct il_rate_info il_rates[IL_RATE_COUNT] = { |
e2ebc833 SG |
100 | IL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ |
101 | IL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ | |
102 | IL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ | |
103 | IL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ | |
104 | IL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ | |
105 | IL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ | |
106 | IL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ | |
107 | IL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ | |
108 | IL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ | |
109 | IL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ | |
110 | IL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ | |
111 | IL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ | |
112 | IL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ | |
be663ab6 WYG |
113 | }; |
114 | ||
e2ebc833 | 115 | static int il4965_hwrate_to_plcp_idx(u32 rate_n_flags) |
be663ab6 WYG |
116 | { |
117 | int idx = 0; | |
118 | ||
119 | /* HT rate format */ | |
120 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
121 | idx = (rate_n_flags & 0xff); | |
122 | ||
e2ebc833 SG |
123 | if (idx >= IL_RATE_MIMO2_6M_PLCP) |
124 | idx = idx - IL_RATE_MIMO2_6M_PLCP; | |
be663ab6 | 125 | |
e2ebc833 | 126 | idx += IL_FIRST_OFDM_RATE; |
be663ab6 | 127 | /* skip 9M not supported in ht*/ |
e2ebc833 | 128 | if (idx >= IL_RATE_9M_INDEX) |
be663ab6 | 129 | idx += 1; |
232913b5 | 130 | if (idx >= IL_FIRST_OFDM_RATE && idx <= IL_LAST_OFDM_RATE) |
be663ab6 WYG |
131 | return idx; |
132 | ||
133 | /* legacy rate format, search for match in table */ | |
134 | } else { | |
d2ddf621 SG |
135 | for (idx = 0; idx < ARRAY_SIZE(il_rates); idx++) |
136 | if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) | |
be663ab6 WYG |
137 | return idx; |
138 | } | |
139 | ||
140 | return -1; | |
141 | } | |
142 | ||
46bc8d4b | 143 | static void il4965_rs_rate_scale_perform(struct il_priv *il, |
be663ab6 WYG |
144 | struct sk_buff *skb, |
145 | struct ieee80211_sta *sta, | |
e2ebc833 | 146 | struct il_lq_sta *lq_sta); |
46bc8d4b | 147 | static void il4965_rs_fill_link_cmd(struct il_priv *il, |
e2ebc833 SG |
148 | struct il_lq_sta *lq_sta, u32 rate_n_flags); |
149 | static void il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, | |
be663ab6 WYG |
150 | bool force_search); |
151 | ||
152 | #ifdef CONFIG_MAC80211_DEBUGFS | |
e2ebc833 | 153 | static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, |
be663ab6 WYG |
154 | u32 *rate_n_flags, int index); |
155 | #else | |
e2ebc833 | 156 | static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, |
be663ab6 WYG |
157 | u32 *rate_n_flags, int index) |
158 | {} | |
159 | #endif | |
160 | ||
161 | /** | |
162 | * The following tables contain the expected throughput metrics for all rates | |
163 | * | |
164 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
165 | * | |
166 | * where invalid entries are zeros. | |
167 | * | |
168 | * CCK rates are only valid in legacy table and will only be used in G | |
169 | * (2.4 GHz) band. | |
170 | */ | |
171 | ||
e2ebc833 | 172 | static s32 expected_tpt_legacy[IL_RATE_COUNT] = { |
be663ab6 WYG |
173 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 |
174 | }; | |
175 | ||
e2ebc833 | 176 | static s32 expected_tpt_siso20MHz[4][IL_RATE_COUNT] = { |
be663ab6 WYG |
177 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 158, 183, 193, 202}, /* Norm */ |
178 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 167, 192, 202, 210}, /* SGI */ | |
179 | {0, 0, 0, 0, 48, 0, 93, 135, 176, 251, 319, 351, 381}, /* AGG */ | |
180 | {0, 0, 0, 0, 53, 0, 102, 149, 193, 275, 348, 381, 413}, /* AGG+SGI */ | |
181 | }; | |
182 | ||
e2ebc833 | 183 | static s32 expected_tpt_siso40MHz[4][IL_RATE_COUNT] = { |
be663ab6 WYG |
184 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ |
185 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ | |
186 | {0, 0, 0, 0, 96, 0, 182, 259, 328, 451, 553, 598, 640}, /* AGG */ | |
187 | {0, 0, 0, 0, 106, 0, 199, 282, 357, 487, 593, 640, 683}, /* AGG+SGI */ | |
188 | }; | |
189 | ||
e2ebc833 | 190 | static s32 expected_tpt_mimo2_20MHz[4][IL_RATE_COUNT] = { |
be663ab6 WYG |
191 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250}, /* Norm */ |
192 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256}, /* SGI */ | |
193 | {0, 0, 0, 0, 92, 0, 175, 250, 317, 436, 534, 578, 619}, /* AGG */ | |
194 | {0, 0, 0, 0, 102, 0, 192, 273, 344, 470, 573, 619, 660}, /* AGG+SGI*/ | |
195 | }; | |
196 | ||
e2ebc833 | 197 | static s32 expected_tpt_mimo2_40MHz[4][IL_RATE_COUNT] = { |
be663ab6 WYG |
198 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ |
199 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ | |
200 | {0, 0, 0, 0, 180, 0, 327, 446, 545, 708, 828, 878, 922}, /* AGG */ | |
201 | {0, 0, 0, 0, 197, 0, 355, 481, 584, 752, 872, 922, 966}, /* AGG+SGI */ | |
202 | }; | |
203 | ||
204 | /* mbps, mcs */ | |
e2ebc833 | 205 | static const struct il_rate_mcs_info il_rate_mcs[IL_RATE_COUNT] = { |
be663ab6 WYG |
206 | { "1", "BPSK DSSS"}, |
207 | { "2", "QPSK DSSS"}, | |
208 | {"5.5", "BPSK CCK"}, | |
209 | { "11", "QPSK CCK"}, | |
210 | { "6", "BPSK 1/2"}, | |
211 | { "9", "BPSK 1/2"}, | |
212 | { "12", "QPSK 1/2"}, | |
213 | { "18", "QPSK 3/4"}, | |
214 | { "24", "16QAM 1/2"}, | |
215 | { "36", "16QAM 3/4"}, | |
216 | { "48", "64QAM 2/3"}, | |
217 | { "54", "64QAM 3/4"}, | |
218 | { "60", "64QAM 5/6"}, | |
219 | }; | |
220 | ||
221 | #define MCS_INDEX_PER_STREAM (8) | |
222 | ||
e2ebc833 | 223 | static inline u8 il4965_rs_extract_rate(u32 rate_n_flags) |
be663ab6 WYG |
224 | { |
225 | return (u8)(rate_n_flags & 0xFF); | |
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 | ||
e2ebc833 | 239 | static inline u8 il4965_rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
be663ab6 WYG |
240 | { |
241 | return (ant_type & valid_antenna) == ant_type; | |
242 | } | |
243 | ||
244 | /* | |
ebf0d90d | 245 | * removes the old data from the stats. All data that is older than |
be663ab6 WYG |
246 | * TID_MAX_TIME_DIFF, will be deleted. |
247 | */ | |
248 | static void | |
e2ebc833 | 249 | il4965_rs_tl_rm_old_stats(struct il_traffic_load *tl, u32 curr_time) |
be663ab6 WYG |
250 | { |
251 | /* The oldest age we want to keep */ | |
252 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
253 | ||
232913b5 | 254 | while (tl->queue_count && tl->time_stamp < oldest_time) { |
be663ab6 WYG |
255 | tl->total -= tl->packet_count[tl->head]; |
256 | tl->packet_count[tl->head] = 0; | |
257 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
258 | tl->queue_count--; | |
259 | tl->head++; | |
260 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
261 | tl->head = 0; | |
262 | } | |
263 | } | |
264 | ||
265 | /* | |
266 | * increment traffic load value for tid and also remove | |
267 | * any old values if passed the certain time period | |
268 | */ | |
e2ebc833 | 269 | static u8 il4965_rs_tl_add_packet(struct il_lq_sta *lq_data, |
be663ab6 WYG |
270 | struct ieee80211_hdr *hdr) |
271 | { | |
272 | u32 curr_time = jiffies_to_msecs(jiffies); | |
273 | u32 time_diff; | |
274 | s32 index; | |
e2ebc833 | 275 | struct il_traffic_load *tl = NULL; |
be663ab6 WYG |
276 | u8 tid; |
277 | ||
278 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
279 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
280 | tid = qc[0] & 0xf; | |
281 | } else | |
282 | return MAX_TID_COUNT; | |
283 | ||
284 | if (unlikely(tid >= TID_MAX_LOAD_COUNT)) | |
285 | return MAX_TID_COUNT; | |
286 | ||
287 | tl = &lq_data->load[tid]; | |
288 | ||
289 | curr_time -= curr_time % TID_ROUND_VALUE; | |
290 | ||
291 | /* Happens only for the first packet. Initialize the data */ | |
292 | if (!(tl->queue_count)) { | |
293 | tl->total = 1; | |
294 | tl->time_stamp = curr_time; | |
295 | tl->queue_count = 1; | |
296 | tl->head = 0; | |
297 | tl->packet_count[0] = 1; | |
298 | return MAX_TID_COUNT; | |
299 | } | |
300 | ||
301 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
302 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
303 | ||
304 | /* The history is too long: remove data that is older than */ | |
305 | /* TID_MAX_TIME_DIFF */ | |
306 | if (index >= TID_QUEUE_MAX_SIZE) | |
e2ebc833 | 307 | il4965_rs_tl_rm_old_stats(tl, curr_time); |
be663ab6 WYG |
308 | |
309 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
310 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
311 | tl->total = tl->total + 1; | |
312 | ||
313 | if ((index + 1) > tl->queue_count) | |
314 | tl->queue_count = index + 1; | |
315 | ||
316 | return tid; | |
317 | } | |
318 | ||
319 | /* | |
320 | get the traffic load value for tid | |
321 | */ | |
e2ebc833 | 322 | static u32 il4965_rs_tl_get_load(struct il_lq_sta *lq_data, u8 tid) |
be663ab6 WYG |
323 | { |
324 | u32 curr_time = jiffies_to_msecs(jiffies); | |
325 | u32 time_diff; | |
326 | s32 index; | |
e2ebc833 | 327 | struct il_traffic_load *tl = NULL; |
be663ab6 WYG |
328 | |
329 | if (tid >= TID_MAX_LOAD_COUNT) | |
330 | return 0; | |
331 | ||
332 | tl = &(lq_data->load[tid]); | |
333 | ||
334 | curr_time -= curr_time % TID_ROUND_VALUE; | |
335 | ||
336 | if (!(tl->queue_count)) | |
337 | return 0; | |
338 | ||
339 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
340 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
341 | ||
342 | /* The history is too long: remove data that is older than */ | |
343 | /* TID_MAX_TIME_DIFF */ | |
344 | if (index >= TID_QUEUE_MAX_SIZE) | |
e2ebc833 | 345 | il4965_rs_tl_rm_old_stats(tl, curr_time); |
be663ab6 WYG |
346 | |
347 | return tl->total; | |
348 | } | |
349 | ||
46bc8d4b | 350 | static int il4965_rs_tl_turn_on_agg_for_tid(struct il_priv *il, |
e2ebc833 | 351 | struct il_lq_sta *lq_data, u8 tid, |
be663ab6 WYG |
352 | struct ieee80211_sta *sta) |
353 | { | |
354 | int ret = -EAGAIN; | |
355 | u32 load; | |
356 | ||
e2ebc833 | 357 | load = il4965_rs_tl_get_load(lq_data, tid); |
be663ab6 | 358 | |
e2ebc833 | 359 | if (load > IL_AGG_LOAD_THRESHOLD) { |
58de00a4 | 360 | D_HT("Starting Tx agg: STA: %pM tid: %d\n", |
be663ab6 WYG |
361 | sta->addr, tid); |
362 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); | |
363 | if (ret == -EAGAIN) { | |
364 | /* | |
365 | * driver and mac80211 is out of sync | |
366 | * this might be cause by reloading firmware | |
367 | * stop the tx ba session here | |
368 | */ | |
9406f797 | 369 | IL_ERR("Fail start Tx agg on tid: %d\n", |
be663ab6 WYG |
370 | tid); |
371 | ieee80211_stop_tx_ba_session(sta, tid); | |
372 | } | |
373 | } else { | |
9406f797 | 374 | IL_ERR("Aggregation not enabled for tid %d " |
be663ab6 WYG |
375 | "because load = %u\n", tid, load); |
376 | } | |
377 | return ret; | |
378 | } | |
379 | ||
46bc8d4b | 380 | static void il4965_rs_tl_turn_on_agg(struct il_priv *il, u8 tid, |
e2ebc833 | 381 | struct il_lq_sta *lq_data, |
be663ab6 WYG |
382 | struct ieee80211_sta *sta) |
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 |
9406f797 | 387 | IL_ERR("tid exceeds max load count: %d/%d\n", |
be663ab6 WYG |
388 | tid, TID_MAX_LOAD_COUNT); |
389 | } | |
390 | ||
e2ebc833 | 391 | static inline int il4965_get_il4965_num_of_ant_from_rate(u32 rate_n_flags) |
be663ab6 WYG |
392 | { |
393 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
394 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
395 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
396 | } | |
397 | ||
398 | /* | |
e2ebc833 | 399 | * Static function to get the expected throughput from an il_scale_tbl_info |
be663ab6 WYG |
400 | * that wraps a NULL pointer check |
401 | */ | |
402 | static s32 | |
e2ebc833 | 403 | il4965_get_expected_tpt(struct il_scale_tbl_info *tbl, int rs_index) |
be663ab6 WYG |
404 | { |
405 | if (tbl->expected_tpt) | |
406 | return tbl->expected_tpt[rs_index]; | |
407 | return 0; | |
408 | } | |
409 | ||
410 | /** | |
6ce1dc45 | 411 | * il4965_rs_collect_tx_data - Update the success/failure sliding win |
be663ab6 | 412 | * |
6ce1dc45 SG |
413 | * We keep a sliding win of the last 62 packets transmitted |
414 | * at this rate. win->data contains the bitmask of successful | |
be663ab6 WYG |
415 | * packets. |
416 | */ | |
e2ebc833 | 417 | static int il4965_rs_collect_tx_data(struct il_scale_tbl_info *tbl, |
be663ab6 WYG |
418 | int scale_index, int attempts, int successes) |
419 | { | |
6ce1dc45 | 420 | struct il_rate_scale_data *win = NULL; |
e2ebc833 | 421 | static const u64 mask = (((u64)1) << (IL_RATE_MAX_WINDOW - 1)); |
be663ab6 WYG |
422 | s32 fail_count, tpt; |
423 | ||
e2ebc833 | 424 | if (scale_index < 0 || scale_index >= IL_RATE_COUNT) |
be663ab6 WYG |
425 | return -EINVAL; |
426 | ||
6ce1dc45 SG |
427 | /* Select win for current tx bit rate */ |
428 | win = &(tbl->win[scale_index]); | |
be663ab6 WYG |
429 | |
430 | /* Get expected throughput */ | |
e2ebc833 | 431 | tpt = il4965_get_expected_tpt(tbl, scale_index); |
be663ab6 WYG |
432 | |
433 | /* | |
434 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
6ce1dc45 SG |
435 | * history win; anything older isn't really relevant any more. |
436 | * If we have filled up the sliding win, drop the oldest attempt; | |
be663ab6 WYG |
437 | * if the oldest attempt (highest bit in bitmap) shows "success", |
438 | * subtract "1" from the success counter (this is the main reason | |
439 | * we keep these bitmaps!). | |
440 | */ | |
441 | while (attempts > 0) { | |
6ce1dc45 | 442 | if (win->counter >= IL_RATE_MAX_WINDOW) { |
be663ab6 WYG |
443 | |
444 | /* remove earliest */ | |
6ce1dc45 | 445 | win->counter = IL_RATE_MAX_WINDOW - 1; |
be663ab6 | 446 | |
6ce1dc45 SG |
447 | if (win->data & mask) { |
448 | win->data &= ~mask; | |
449 | win->success_counter--; | |
be663ab6 WYG |
450 | } |
451 | } | |
452 | ||
453 | /* Increment frames-attempted counter */ | |
6ce1dc45 | 454 | win->counter++; |
be663ab6 WYG |
455 | |
456 | /* Shift bitmap by one frame to throw away oldest history */ | |
6ce1dc45 | 457 | win->data <<= 1; |
be663ab6 WYG |
458 | |
459 | /* Mark the most recent #successes attempts as successful */ | |
460 | if (successes > 0) { | |
6ce1dc45 SG |
461 | win->success_counter++; |
462 | win->data |= 0x1; | |
be663ab6 WYG |
463 | successes--; |
464 | } | |
465 | ||
466 | attempts--; | |
467 | } | |
468 | ||
469 | /* Calculate current success ratio, avoid divide-by-0! */ | |
6ce1dc45 SG |
470 | if (win->counter > 0) |
471 | win->success_ratio = 128 * (100 * win->success_counter) | |
472 | / win->counter; | |
be663ab6 | 473 | else |
6ce1dc45 | 474 | win->success_ratio = IL_INVALID_VALUE; |
be663ab6 | 475 | |
6ce1dc45 | 476 | fail_count = win->counter - win->success_counter; |
be663ab6 WYG |
477 | |
478 | /* Calculate average throughput, if we have enough history. */ | |
232913b5 | 479 | if (fail_count >= IL_RATE_MIN_FAILURE_TH || |
6ce1dc45 SG |
480 | win->success_counter >= IL_RATE_MIN_SUCCESS_TH) |
481 | win->average_tpt = (win->success_ratio * tpt + 64) / 128; | |
be663ab6 | 482 | else |
6ce1dc45 | 483 | win->average_tpt = IL_INVALID_VALUE; |
be663ab6 | 484 | |
6ce1dc45 SG |
485 | /* Tag this win as having been updated */ |
486 | win->stamp = jiffies; | |
be663ab6 WYG |
487 | |
488 | return 0; | |
489 | } | |
490 | ||
491 | /* | |
492 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
493 | */ | |
46bc8d4b | 494 | static u32 il4965_rate_n_flags_from_tbl(struct il_priv *il, |
e2ebc833 | 495 | struct il_scale_tbl_info *tbl, |
be663ab6 WYG |
496 | int index, u8 use_green) |
497 | { | |
498 | u32 rate_n_flags = 0; | |
499 | ||
500 | if (is_legacy(tbl->lq_type)) { | |
d2ddf621 | 501 | rate_n_flags = il_rates[index].plcp; |
e2ebc833 | 502 | if (index >= IL_FIRST_CCK_RATE && index <= IL_LAST_CCK_RATE) |
be663ab6 WYG |
503 | rate_n_flags |= RATE_MCS_CCK_MSK; |
504 | ||
505 | } else if (is_Ht(tbl->lq_type)) { | |
e2ebc833 | 506 | if (index > IL_LAST_OFDM_RATE) { |
9406f797 | 507 | IL_ERR("Invalid HT rate index %d\n", index); |
e2ebc833 | 508 | index = IL_LAST_OFDM_RATE; |
be663ab6 WYG |
509 | } |
510 | rate_n_flags = RATE_MCS_HT_MSK; | |
511 | ||
512 | if (is_siso(tbl->lq_type)) | |
d2ddf621 | 513 | rate_n_flags |= il_rates[index].plcp_siso; |
be663ab6 | 514 | else |
d2ddf621 | 515 | rate_n_flags |= il_rates[index].plcp_mimo2; |
be663ab6 | 516 | } else { |
9406f797 | 517 | IL_ERR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
be663ab6 WYG |
518 | } |
519 | ||
520 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & | |
521 | RATE_MCS_ANT_ABC_MSK); | |
522 | ||
523 | if (is_Ht(tbl->lq_type)) { | |
524 | if (tbl->is_ht40) { | |
525 | if (tbl->is_dup) | |
526 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
527 | else | |
528 | rate_n_flags |= RATE_MCS_HT40_MSK; | |
529 | } | |
530 | if (tbl->is_SGI) | |
531 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
532 | ||
533 | if (use_green) { | |
534 | rate_n_flags |= RATE_MCS_GF_MSK; | |
535 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
536 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
9406f797 | 537 | IL_ERR("GF was set with SGI:SISO\n"); |
be663ab6 WYG |
538 | } |
539 | } | |
540 | } | |
541 | return rate_n_flags; | |
542 | } | |
543 | ||
544 | /* | |
545 | * Interpret uCode API's rate_n_flags format, | |
546 | * fill "search" or "active" tx mode table. | |
547 | */ | |
e2ebc833 | 548 | static int il4965_rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
be663ab6 | 549 | enum ieee80211_band band, |
e2ebc833 | 550 | struct il_scale_tbl_info *tbl, |
be663ab6 WYG |
551 | int *rate_idx) |
552 | { | |
553 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); | |
e2ebc833 | 554 | u8 il4965_num_of_ant = il4965_get_il4965_num_of_ant_from_rate(rate_n_flags); |
be663ab6 WYG |
555 | u8 mcs; |
556 | ||
e2ebc833 SG |
557 | memset(tbl, 0, sizeof(struct il_scale_tbl_info)); |
558 | *rate_idx = il4965_hwrate_to_plcp_idx(rate_n_flags); | |
be663ab6 | 559 | |
e2ebc833 | 560 | if (*rate_idx == IL_RATE_INVALID) { |
be663ab6 WYG |
561 | *rate_idx = -1; |
562 | return -EINVAL; | |
563 | } | |
564 | tbl->is_SGI = 0; /* default legacy setup */ | |
565 | tbl->is_ht40 = 0; | |
566 | tbl->is_dup = 0; | |
567 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); | |
568 | tbl->lq_type = LQ_NONE; | |
e2ebc833 | 569 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
570 | |
571 | /* legacy rate format */ | |
572 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { | |
e2ebc833 | 573 | if (il4965_num_of_ant == 1) { |
be663ab6 WYG |
574 | if (band == IEEE80211_BAND_5GHZ) |
575 | tbl->lq_type = LQ_A; | |
576 | else | |
577 | tbl->lq_type = LQ_G; | |
578 | } | |
579 | /* HT rate format */ | |
580 | } else { | |
581 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
582 | tbl->is_SGI = 1; | |
583 | ||
584 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || | |
585 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
586 | tbl->is_ht40 = 1; | |
587 | ||
588 | if (rate_n_flags & RATE_MCS_DUP_MSK) | |
589 | tbl->is_dup = 1; | |
590 | ||
e2ebc833 | 591 | mcs = il4965_rs_extract_rate(rate_n_flags); |
be663ab6 WYG |
592 | |
593 | /* SISO */ | |
e2ebc833 SG |
594 | if (mcs <= IL_RATE_SISO_60M_PLCP) { |
595 | if (il4965_num_of_ant == 1) | |
be663ab6 WYG |
596 | tbl->lq_type = LQ_SISO; /*else NONE*/ |
597 | /* MIMO2 */ | |
598 | } else { | |
e2ebc833 | 599 | if (il4965_num_of_ant == 2) |
be663ab6 WYG |
600 | tbl->lq_type = LQ_MIMO2; |
601 | } | |
602 | } | |
603 | return 0; | |
604 | } | |
605 | ||
606 | /* switch to another antenna/antennas and return 1 */ | |
607 | /* if no other valid antenna found, return 0 */ | |
e2ebc833 SG |
608 | static int il4965_rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, |
609 | struct il_scale_tbl_info *tbl) | |
be663ab6 WYG |
610 | { |
611 | u8 new_ant_type; | |
612 | ||
613 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
614 | return 0; | |
615 | ||
e2ebc833 | 616 | if (!il4965_rs_is_valid_ant(valid_ant, tbl->ant_type)) |
be663ab6 WYG |
617 | return 0; |
618 | ||
619 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
620 | ||
232913b5 | 621 | while (new_ant_type != tbl->ant_type && |
e2ebc833 | 622 | !il4965_rs_is_valid_ant(valid_ant, new_ant_type)) |
be663ab6 WYG |
623 | new_ant_type = ant_toggle_lookup[new_ant_type]; |
624 | ||
625 | if (new_ant_type == tbl->ant_type) | |
626 | return 0; | |
627 | ||
628 | tbl->ant_type = new_ant_type; | |
629 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
630 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
631 | return 1; | |
632 | } | |
633 | ||
634 | /** | |
635 | * Green-field mode is valid if the station supports it and | |
636 | * there are no non-GF stations present in the BSS. | |
637 | */ | |
e2ebc833 | 638 | static bool il4965_rs_use_green(struct ieee80211_sta *sta) |
be663ab6 | 639 | { |
e2ebc833 SG |
640 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; |
641 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 WYG |
642 | |
643 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && | |
644 | !(ctx->ht.non_gf_sta_present); | |
645 | } | |
646 | ||
647 | /** | |
e2ebc833 | 648 | * il4965_rs_get_supported_rates - get the available rates |
be663ab6 WYG |
649 | * |
650 | * if management frame or broadcast frame only return | |
651 | * basic available rates. | |
652 | * | |
653 | */ | |
e2ebc833 | 654 | static u16 il4965_rs_get_supported_rates(struct il_lq_sta *lq_sta, |
be663ab6 | 655 | struct ieee80211_hdr *hdr, |
e2ebc833 | 656 | enum il_table_type rate_type) |
be663ab6 WYG |
657 | { |
658 | if (is_legacy(rate_type)) { | |
659 | return lq_sta->active_legacy_rate; | |
660 | } else { | |
661 | if (is_siso(rate_type)) | |
662 | return lq_sta->active_siso_rate; | |
663 | else | |
664 | return lq_sta->active_mimo2_rate; | |
665 | } | |
666 | } | |
667 | ||
668 | static u16 | |
46bc8d4b | 669 | il4965_rs_get_adjacent_rate(struct il_priv *il, u8 index, u16 rate_mask, |
be663ab6 WYG |
670 | int rate_type) |
671 | { | |
e2ebc833 SG |
672 | u8 high = IL_RATE_INVALID; |
673 | u8 low = IL_RATE_INVALID; | |
be663ab6 WYG |
674 | |
675 | /* 802.11A or ht walks to the next literal adjacent rate in | |
676 | * the rate table */ | |
677 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
678 | int i; | |
679 | u32 mask; | |
680 | ||
681 | /* Find the previous rate that is in the rate mask */ | |
682 | i = index - 1; | |
683 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
684 | if (rate_mask & mask) { | |
685 | low = i; | |
686 | break; | |
687 | } | |
688 | } | |
689 | ||
690 | /* Find the next rate that is in the rate mask */ | |
691 | i = index + 1; | |
e2ebc833 | 692 | for (mask = (1 << i); i < IL_RATE_COUNT; i++, mask <<= 1) { |
be663ab6 WYG |
693 | if (rate_mask & mask) { |
694 | high = i; | |
695 | break; | |
696 | } | |
697 | } | |
698 | ||
699 | return (high << 8) | low; | |
700 | } | |
701 | ||
702 | low = index; | |
e2ebc833 | 703 | while (low != IL_RATE_INVALID) { |
d2ddf621 | 704 | low = il_rates[low].prev_rs; |
e2ebc833 | 705 | if (low == IL_RATE_INVALID) |
be663ab6 WYG |
706 | break; |
707 | if (rate_mask & (1 << low)) | |
708 | break; | |
58de00a4 | 709 | D_RATE("Skipping masked lower rate: %d\n", low); |
be663ab6 WYG |
710 | } |
711 | ||
712 | high = index; | |
e2ebc833 | 713 | while (high != IL_RATE_INVALID) { |
d2ddf621 | 714 | high = il_rates[high].next_rs; |
e2ebc833 | 715 | if (high == IL_RATE_INVALID) |
be663ab6 WYG |
716 | break; |
717 | if (rate_mask & (1 << high)) | |
718 | break; | |
58de00a4 | 719 | D_RATE("Skipping masked higher rate: %d\n", high); |
be663ab6 WYG |
720 | } |
721 | ||
722 | return (high << 8) | low; | |
723 | } | |
724 | ||
e2ebc833 SG |
725 | static u32 il4965_rs_get_lower_rate(struct il_lq_sta *lq_sta, |
726 | struct il_scale_tbl_info *tbl, | |
be663ab6 WYG |
727 | u8 scale_index, u8 ht_possible) |
728 | { | |
729 | s32 low; | |
730 | u16 rate_mask; | |
731 | u16 high_low; | |
732 | u8 switch_to_legacy = 0; | |
733 | u8 is_green = lq_sta->is_green; | |
46bc8d4b | 734 | struct il_priv *il = lq_sta->drv; |
be663ab6 WYG |
735 | |
736 | /* check if we need to switch from HT to legacy rates. | |
737 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
738 | * are always supported (spec demand) */ | |
739 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
740 | switch_to_legacy = 1; | |
741 | scale_index = rs_ht_to_legacy[scale_index]; | |
742 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
743 | tbl->lq_type = LQ_A; | |
744 | else | |
745 | tbl->lq_type = LQ_G; | |
746 | ||
e2ebc833 | 747 | if (il4965_num_of_ant(tbl->ant_type) > 1) |
be663ab6 | 748 | tbl->ant_type = |
46bc8d4b | 749 | il4965_first_antenna(il->hw_params.valid_tx_ant); |
be663ab6 WYG |
750 | |
751 | tbl->is_ht40 = 0; | |
752 | tbl->is_SGI = 0; | |
e2ebc833 | 753 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
754 | } |
755 | ||
e2ebc833 | 756 | rate_mask = il4965_rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
be663ab6 WYG |
757 | |
758 | /* Mask with station rate restriction */ | |
759 | if (is_legacy(tbl->lq_type)) { | |
760 | /* supp_rates has no CCK bits in A mode */ | |
761 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
762 | rate_mask = (u16)(rate_mask & | |
e2ebc833 | 763 | (lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); |
be663ab6 WYG |
764 | else |
765 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); | |
766 | } | |
767 | ||
768 | /* If we switched from HT to legacy, check current rate */ | |
769 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { | |
770 | low = scale_index; | |
771 | goto out; | |
772 | } | |
773 | ||
e2ebc833 | 774 | high_low = il4965_rs_get_adjacent_rate(lq_sta->drv, |
be663ab6 WYG |
775 | scale_index, rate_mask, |
776 | tbl->lq_type); | |
777 | low = high_low & 0xff; | |
778 | ||
e2ebc833 | 779 | if (low == IL_RATE_INVALID) |
be663ab6 WYG |
780 | low = scale_index; |
781 | ||
782 | out: | |
e2ebc833 | 783 | return il4965_rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
be663ab6 WYG |
784 | } |
785 | ||
786 | /* | |
787 | * Simple function to compare two rate scale table types | |
788 | */ | |
e2ebc833 SG |
789 | static bool il4965_table_type_matches(struct il_scale_tbl_info *a, |
790 | struct il_scale_tbl_info *b) | |
be663ab6 | 791 | { |
232913b5 SG |
792 | return (a->lq_type == b->lq_type && a->ant_type == b->ant_type && |
793 | a->is_SGI == b->is_SGI); | |
be663ab6 WYG |
794 | } |
795 | ||
796 | /* | |
797 | * mac80211 sends us Tx status | |
798 | */ | |
799 | static void | |
46bc8d4b SG |
800 | il4965_rs_tx_status(void *il_r, struct ieee80211_supported_band *sband, |
801 | struct ieee80211_sta *sta, void *il_sta, | |
be663ab6 WYG |
802 | struct sk_buff *skb) |
803 | { | |
804 | int legacy_success; | |
805 | int retries; | |
806 | int rs_index, mac_index, i; | |
46bc8d4b | 807 | struct il_lq_sta *lq_sta = il_sta; |
e2ebc833 | 808 | struct il_link_quality_cmd *table; |
be663ab6 | 809 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
46bc8d4b | 810 | struct il_priv *il = (struct il_priv *)il_r; |
be663ab6 WYG |
811 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
812 | enum mac80211_rate_control_flags mac_flags; | |
813 | u32 tx_rate; | |
e2ebc833 SG |
814 | struct il_scale_tbl_info tbl_type; |
815 | struct il_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; | |
816 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; | |
817 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 | 818 | |
58de00a4 | 819 | D_RATE( |
6ce1dc45 | 820 | "get frame ack response, update rate scale win\n"); |
be663ab6 WYG |
821 | |
822 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
823 | if (!lq_sta) { | |
58de00a4 | 824 | D_RATE("Station rate scaling not created yet.\n"); |
be663ab6 WYG |
825 | return; |
826 | } else if (!lq_sta->drv) { | |
58de00a4 | 827 | D_RATE("Rate scaling not initialized yet.\n"); |
be663ab6 WYG |
828 | return; |
829 | } | |
830 | ||
831 | if (!ieee80211_is_data(hdr->frame_control) || | |
232913b5 | 832 | (info->flags & IEEE80211_TX_CTL_NO_ACK)) |
be663ab6 WYG |
833 | return; |
834 | ||
835 | /* This packet was aggregated but doesn't carry status info */ | |
836 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
837 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
838 | return; | |
839 | ||
840 | /* | |
841 | * Ignore this Tx frame response if its initial rate doesn't match | |
842 | * that of latest Link Quality command. There may be stragglers | |
843 | * from a previous Link Quality command, but we're no longer interested | |
844 | * in those; they're either from the "active" mode while we're trying | |
845 | * to check "search" mode, or a prior "search" mode after we've moved | |
846 | * to a new "search" mode (which might become the new "active" mode). | |
847 | */ | |
848 | table = &lq_sta->lq; | |
849 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
e2ebc833 | 850 | il4965_rs_get_tbl_info_from_mcs(tx_rate, |
46bc8d4b SG |
851 | il->band, &tbl_type, &rs_index); |
852 | if (il->band == IEEE80211_BAND_5GHZ) | |
e2ebc833 | 853 | rs_index -= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
854 | mac_flags = info->status.rates[0].flags; |
855 | mac_index = info->status.rates[0].idx; | |
856 | /* For HT packets, map MCS to PLCP */ | |
857 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
858 | mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ | |
e2ebc833 | 859 | if (mac_index >= (IL_RATE_9M_INDEX - IL_FIRST_OFDM_RATE)) |
be663ab6 WYG |
860 | mac_index++; |
861 | /* | |
862 | * mac80211 HT index is always zero-indexed; we need to move | |
863 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
864 | */ | |
46bc8d4b | 865 | if (il->band == IEEE80211_BAND_2GHZ) |
e2ebc833 | 866 | mac_index += IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
867 | } |
868 | /* Here we actually compare this rate to the latest LQ command */ | |
232913b5 SG |
869 | if (mac_index < 0 || |
870 | tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI) || | |
871 | tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH) || | |
872 | tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA) || | |
873 | tbl_type.ant_type != info->antenna_sel_tx || | |
874 | !!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS) || | |
875 | !!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD) || | |
876 | rs_index != mac_index) { | |
58de00a4 | 877 | D_RATE( |
be663ab6 WYG |
878 | "initial rate %d does not match %d (0x%x)\n", |
879 | mac_index, rs_index, tx_rate); | |
880 | /* | |
881 | * Since rates mis-match, the last LQ command may have failed. | |
e2ebc833 | 882 | * After IL_MISSED_RATE_MAX mis-matches, resync the uCode with |
be663ab6 WYG |
883 | * ... driver. |
884 | */ | |
885 | lq_sta->missed_rate_counter++; | |
e2ebc833 | 886 | if (lq_sta->missed_rate_counter > IL_MISSED_RATE_MAX) { |
be663ab6 | 887 | lq_sta->missed_rate_counter = 0; |
46bc8d4b | 888 | il_send_lq_cmd(il, ctx, &lq_sta->lq, |
be663ab6 WYG |
889 | CMD_ASYNC, false); |
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 */ | |
e2ebc833 | 898 | if (il4965_table_type_matches(&tbl_type, |
be663ab6 WYG |
899 | &(lq_sta->lq_info[lq_sta->active_tbl]))) { |
900 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
901 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
e2ebc833 | 902 | } else if (il4965_table_type_matches(&tbl_type, |
be663ab6 WYG |
903 | &lq_sta->lq_info[1 - lq_sta->active_tbl])) { |
904 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
905 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
906 | } else { | |
58de00a4 | 907 | D_RATE( |
be663ab6 WYG |
908 | "Neither active nor search matches tx rate\n"); |
909 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
58de00a4 | 910 | D_RATE("active- lq:%x, ant:%x, SGI:%d\n", |
be663ab6 WYG |
911 | tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); |
912 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
58de00a4 | 913 | D_RATE("search- lq:%x, ant:%x, SGI:%d\n", |
be663ab6 | 914 | tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); |
58de00a4 | 915 | D_RATE("actual- lq:%x, ant:%x, SGI:%d\n", |
be663ab6 WYG |
916 | tbl_type.lq_type, tbl_type.ant_type, tbl_type.is_SGI); |
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 | |
930 | * first index into rate scale table. | |
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, |
be663ab6 | 935 | &rs_index); |
e2ebc833 | 936 | il4965_rs_collect_tx_data(curr_tbl, rs_index, |
be663ab6 WYG |
937 | info->status.ampdu_len, |
938 | info->status.ampdu_ack_len); | |
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; | |
943 | lq_sta->total_failed += (info->status.ampdu_len - | |
944 | info->status.ampdu_ack_len); | |
945 | } | |
946 | } else { | |
947 | /* | |
948 | * For legacy, update frame history with for each Tx retry. | |
949 | */ | |
950 | retries = info->status.rates[0].count - 1; | |
951 | /* HW doesn't send more than 15 retries */ | |
952 | retries = min(retries, 15); | |
953 | ||
954 | /* The last transmission may have been successful */ | |
955 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
956 | /* Collect data for each rate used during failed TX attempts */ | |
957 | for (i = 0; i <= retries; ++i) { | |
958 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
46bc8d4b | 959 | il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, |
be663ab6 WYG |
960 | &tbl_type, &rs_index); |
961 | /* | |
962 | * Only collect stats if retried rate is in the same RS | |
963 | * table as active/search. | |
964 | */ | |
e2ebc833 | 965 | if (il4965_table_type_matches(&tbl_type, curr_tbl)) |
be663ab6 | 966 | tmp_tbl = curr_tbl; |
e2ebc833 | 967 | else if (il4965_table_type_matches(&tbl_type, |
be663ab6 WYG |
968 | other_tbl)) |
969 | tmp_tbl = other_tbl; | |
970 | else | |
971 | continue; | |
e2ebc833 | 972 | il4965_rs_collect_tx_data(tmp_tbl, rs_index, 1, |
be663ab6 WYG |
973 | i < retries ? 0 : legacy_success); |
974 | } | |
975 | ||
976 | /* Update success/fail counts if not searching for new mode */ | |
977 | if (lq_sta->stay_in_tbl) { | |
978 | lq_sta->total_success += legacy_success; | |
979 | lq_sta->total_failed += retries + (1 - legacy_success); | |
980 | } | |
981 | } | |
982 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
983 | lq_sta->last_rate_n_flags = tx_rate; | |
984 | done: | |
985 | /* See if there's a better rate or modulation mode to try. */ | |
986 | if (sta && sta->supp_rates[sband->band]) | |
46bc8d4b | 987 | il4965_rs_rate_scale_perform(il, skb, sta, lq_sta); |
be663ab6 WYG |
988 | } |
989 | ||
990 | /* | |
991 | * Begin a period of staying with a selected modulation mode. | |
992 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
993 | * Set frame tx success limits according to legacy vs. high-throughput, | |
ebf0d90d | 994 | * and reset overall (spanning all rates) tx success history stats. |
be663ab6 WYG |
995 | * These control how long we stay using same modulation mode before |
996 | * searching for a new mode. | |
997 | */ | |
46bc8d4b | 998 | static void il4965_rs_set_stay_in_table(struct il_priv *il, u8 is_legacy, |
e2ebc833 | 999 | struct il_lq_sta *lq_sta) |
be663ab6 | 1000 | { |
58de00a4 | 1001 | D_RATE("we are staying in the same table\n"); |
be663ab6 WYG |
1002 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
1003 | if (is_legacy) { | |
e2ebc833 SG |
1004 | lq_sta->table_count_limit = IL_LEGACY_TABLE_COUNT; |
1005 | lq_sta->max_failure_limit = IL_LEGACY_FAILURE_LIMIT; | |
1006 | lq_sta->max_success_limit = IL_LEGACY_SUCCESS_LIMIT; | |
be663ab6 | 1007 | } else { |
e2ebc833 SG |
1008 | lq_sta->table_count_limit = IL_NONE_LEGACY_TABLE_COUNT; |
1009 | lq_sta->max_failure_limit = IL_NONE_LEGACY_FAILURE_LIMIT; | |
1010 | lq_sta->max_success_limit = IL_NONE_LEGACY_SUCCESS_LIMIT; | |
be663ab6 WYG |
1011 | } |
1012 | lq_sta->table_count = 0; | |
1013 | lq_sta->total_failed = 0; | |
1014 | lq_sta->total_success = 0; | |
1015 | lq_sta->flush_timer = jiffies; | |
1016 | lq_sta->action_counter = 0; | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * Find correct throughput table for given mode of modulation | |
1021 | */ | |
e2ebc833 SG |
1022 | static void il4965_rs_set_expected_tpt_table(struct il_lq_sta *lq_sta, |
1023 | struct il_scale_tbl_info *tbl) | |
be663ab6 WYG |
1024 | { |
1025 | /* Used to choose among HT tables */ | |
e2ebc833 | 1026 | s32 (*ht_tbl_pointer)[IL_RATE_COUNT]; |
be663ab6 WYG |
1027 | |
1028 | /* Check for invalid LQ type */ | |
1029 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
1030 | tbl->expected_tpt = expected_tpt_legacy; | |
1031 | return; | |
1032 | } | |
1033 | ||
1034 | /* Legacy rates have only one table */ | |
1035 | if (is_legacy(tbl->lq_type)) { | |
1036 | tbl->expected_tpt = expected_tpt_legacy; | |
1037 | return; | |
1038 | } | |
1039 | ||
1040 | /* Choose among many HT tables depending on number of streams | |
1041 | * (SISO/MIMO2), channel width (20/40), SGI, and aggregation | |
1042 | * status */ | |
1043 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1044 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
1045 | else if (is_siso(tbl->lq_type)) | |
1046 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
1047 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1048 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1049 | else /* if (is_mimo2(tbl->lq_type)) <-- must be true */ | |
1050 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1051 | ||
1052 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ | |
1053 | tbl->expected_tpt = ht_tbl_pointer[0]; | |
1054 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
1055 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
1056 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
1057 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
1058 | else /* AGG+SGI */ | |
1059 | tbl->expected_tpt = ht_tbl_pointer[3]; | |
1060 | } | |
1061 | ||
1062 | /* | |
1063 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1064 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1065 | * above the current measured throughput of "active" mode, to give new mode | |
1066 | * a fair chance to prove itself without too many challenges. | |
1067 | * | |
1068 | * This gets called when transitioning to more aggressive modulation | |
1069 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1070 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1071 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1072 | * bit rate will typically need to increase, but not if performance was bad. | |
1073 | */ | |
46bc8d4b | 1074 | static s32 il4965_rs_get_best_rate(struct il_priv *il, |
e2ebc833 SG |
1075 | struct il_lq_sta *lq_sta, |
1076 | struct il_scale_tbl_info *tbl, /* "search" */ | |
be663ab6 WYG |
1077 | u16 rate_mask, s8 index) |
1078 | { | |
1079 | /* "active" values */ | |
e2ebc833 | 1080 | struct il_scale_tbl_info *active_tbl = |
be663ab6 WYG |
1081 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
1082 | s32 active_sr = active_tbl->win[index].success_ratio; | |
1083 | s32 active_tpt = active_tbl->expected_tpt[index]; | |
1084 | ||
1085 | /* expected "search" throughput */ | |
1086 | s32 *tpt_tbl = tbl->expected_tpt; | |
1087 | ||
1088 | s32 new_rate, high, low, start_hi; | |
1089 | u16 high_low; | |
1090 | s8 rate = index; | |
1091 | ||
e2ebc833 | 1092 | new_rate = high = low = start_hi = IL_RATE_INVALID; |
be663ab6 WYG |
1093 | |
1094 | for (; ;) { | |
46bc8d4b | 1095 | high_low = il4965_rs_get_adjacent_rate(il, rate, rate_mask, |
be663ab6 WYG |
1096 | tbl->lq_type); |
1097 | ||
1098 | low = high_low & 0xff; | |
1099 | high = (high_low >> 8) & 0xff; | |
1100 | ||
1101 | /* | |
1102 | * Lower the "search" bit rate, to give new "search" mode | |
1103 | * approximately the same throughput as "active" if: | |
1104 | * | |
1105 | * 1) "Active" mode has been working modestly well (but not | |
1106 | * great), and expected "search" throughput (under perfect | |
1107 | * conditions) at candidate rate is above the actual | |
1108 | * measured "active" throughput (but less than expected | |
1109 | * "active" throughput under perfect conditions). | |
1110 | * OR | |
1111 | * 2) "Active" mode has been working perfectly or very well | |
1112 | * and expected "search" throughput (under perfect | |
1113 | * conditions) at candidate rate is above expected | |
1114 | * "active" throughput (under perfect conditions). | |
1115 | */ | |
232913b5 SG |
1116 | if ((100 * tpt_tbl[rate] > lq_sta->last_tpt && |
1117 | (active_sr > IL_RATE_DECREASE_TH && | |
1118 | active_sr <= IL_RATE_HIGH_TH && | |
1119 | tpt_tbl[rate] <= active_tpt)) || | |
1120 | (active_sr >= IL_RATE_SCALE_SWITCH && | |
1121 | tpt_tbl[rate] > active_tpt)) { | |
be663ab6 WYG |
1122 | |
1123 | /* (2nd or later pass) | |
1124 | * If we've already tried to raise the rate, and are | |
1125 | * now trying to lower it, use the higher rate. */ | |
e2ebc833 | 1126 | if (start_hi != IL_RATE_INVALID) { |
be663ab6 WYG |
1127 | new_rate = start_hi; |
1128 | break; | |
1129 | } | |
1130 | ||
1131 | new_rate = rate; | |
1132 | ||
1133 | /* Loop again with lower rate */ | |
e2ebc833 | 1134 | if (low != IL_RATE_INVALID) |
be663ab6 WYG |
1135 | rate = low; |
1136 | ||
1137 | /* Lower rate not available, use the original */ | |
1138 | else | |
1139 | break; | |
1140 | ||
1141 | /* Else try to raise the "search" rate to match "active" */ | |
1142 | } else { | |
1143 | /* (2nd or later pass) | |
1144 | * If we've already tried to lower the rate, and are | |
1145 | * now trying to raise it, use the lower rate. */ | |
e2ebc833 | 1146 | if (new_rate != IL_RATE_INVALID) |
be663ab6 WYG |
1147 | break; |
1148 | ||
1149 | /* Loop again with higher rate */ | |
e2ebc833 | 1150 | else if (high != IL_RATE_INVALID) { |
be663ab6 WYG |
1151 | start_hi = high; |
1152 | rate = high; | |
1153 | ||
1154 | /* Higher rate not available, use the original */ | |
1155 | } else { | |
1156 | new_rate = rate; | |
1157 | break; | |
1158 | } | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | return new_rate; | |
1163 | } | |
1164 | ||
1165 | /* | |
1166 | * Set up search table for MIMO2 | |
1167 | */ | |
46bc8d4b | 1168 | static int il4965_rs_switch_to_mimo2(struct il_priv *il, |
e2ebc833 | 1169 | struct il_lq_sta *lq_sta, |
be663ab6 WYG |
1170 | struct ieee80211_conf *conf, |
1171 | struct ieee80211_sta *sta, | |
e2ebc833 | 1172 | struct il_scale_tbl_info *tbl, int index) |
be663ab6 WYG |
1173 | { |
1174 | u16 rate_mask; | |
1175 | s32 rate; | |
1176 | s8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1177 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; |
1178 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 WYG |
1179 | |
1180 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1181 | return -1; | |
1182 | ||
1183 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) | |
1184 | == WLAN_HT_CAP_SM_PS_STATIC) | |
1185 | return -1; | |
1186 | ||
1187 | /* Need both Tx chains/antennas to support MIMO */ | |
46bc8d4b | 1188 | if (il->hw_params.tx_chains_num < 2) |
be663ab6 WYG |
1189 | return -1; |
1190 | ||
58de00a4 | 1191 | D_RATE("LQ: try to switch to MIMO2\n"); |
be663ab6 WYG |
1192 | |
1193 | tbl->lq_type = LQ_MIMO2; | |
1194 | tbl->is_dup = lq_sta->is_dup; | |
1195 | tbl->action = 0; | |
e2ebc833 | 1196 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
1197 | rate_mask = lq_sta->active_mimo2_rate; |
1198 | ||
46bc8d4b | 1199 | if (il_is_ht40_tx_allowed(il, ctx, &sta->ht_cap)) |
be663ab6 WYG |
1200 | tbl->is_ht40 = 1; |
1201 | else | |
1202 | tbl->is_ht40 = 0; | |
1203 | ||
e2ebc833 | 1204 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
be663ab6 | 1205 | |
46bc8d4b | 1206 | rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, index); |
be663ab6 | 1207 | |
58de00a4 | 1208 | D_RATE("LQ: MIMO2 best rate %d mask %X\n", |
be663ab6 | 1209 | rate, rate_mask); |
232913b5 | 1210 | if (rate == IL_RATE_INVALID || !((1 << rate) & rate_mask)) { |
58de00a4 | 1211 | D_RATE( |
be663ab6 WYG |
1212 | "Can't switch with index %d rate mask %x\n", |
1213 | rate, rate_mask); | |
1214 | return -1; | |
1215 | } | |
46bc8d4b | 1216 | tbl->current_rate = il4965_rate_n_flags_from_tbl(il, |
be663ab6 WYG |
1217 | tbl, rate, is_green); |
1218 | ||
58de00a4 | 1219 | D_RATE("LQ: Switch to new mcs %X index is green %X\n", |
be663ab6 WYG |
1220 | tbl->current_rate, is_green); |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * Set up search table for SISO | |
1226 | */ | |
46bc8d4b | 1227 | static int il4965_rs_switch_to_siso(struct il_priv *il, |
e2ebc833 | 1228 | struct il_lq_sta *lq_sta, |
be663ab6 WYG |
1229 | struct ieee80211_conf *conf, |
1230 | struct ieee80211_sta *sta, | |
e2ebc833 | 1231 | struct il_scale_tbl_info *tbl, int index) |
be663ab6 WYG |
1232 | { |
1233 | u16 rate_mask; | |
1234 | u8 is_green = lq_sta->is_green; | |
1235 | s32 rate; | |
e2ebc833 SG |
1236 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; |
1237 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 WYG |
1238 | |
1239 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1240 | return -1; | |
1241 | ||
58de00a4 | 1242 | D_RATE("LQ: try to switch to SISO\n"); |
be663ab6 WYG |
1243 | |
1244 | tbl->is_dup = lq_sta->is_dup; | |
1245 | tbl->lq_type = LQ_SISO; | |
1246 | tbl->action = 0; | |
e2ebc833 | 1247 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
1248 | rate_mask = lq_sta->active_siso_rate; |
1249 | ||
46bc8d4b | 1250 | if (il_is_ht40_tx_allowed(il, ctx, &sta->ht_cap)) |
be663ab6 WYG |
1251 | tbl->is_ht40 = 1; |
1252 | else | |
1253 | tbl->is_ht40 = 0; | |
1254 | ||
1255 | if (is_green) | |
1256 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ | |
1257 | ||
e2ebc833 | 1258 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
46bc8d4b | 1259 | rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, index); |
be663ab6 | 1260 | |
58de00a4 | 1261 | D_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
232913b5 | 1262 | if (rate == IL_RATE_INVALID || !((1 << rate) & rate_mask)) { |
58de00a4 | 1263 | D_RATE( |
be663ab6 WYG |
1264 | "can not switch with index %d rate mask %x\n", |
1265 | rate, rate_mask); | |
1266 | return -1; | |
1267 | } | |
46bc8d4b | 1268 | tbl->current_rate = il4965_rate_n_flags_from_tbl(il, |
be663ab6 | 1269 | tbl, rate, is_green); |
58de00a4 | 1270 | D_RATE("LQ: Switch to new mcs %X index is green %X\n", |
be663ab6 WYG |
1271 | tbl->current_rate, is_green); |
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Try to switch to new modulation mode from legacy | |
1277 | */ | |
46bc8d4b | 1278 | static int il4965_rs_move_legacy_other(struct il_priv *il, |
e2ebc833 | 1279 | struct il_lq_sta *lq_sta, |
be663ab6 WYG |
1280 | struct ieee80211_conf *conf, |
1281 | struct ieee80211_sta *sta, | |
1282 | int index) | |
1283 | { | |
e2ebc833 SG |
1284 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1285 | struct il_scale_tbl_info *search_tbl = | |
be663ab6 | 1286 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
6ce1dc45 | 1287 | struct il_rate_scale_data *win = &(tbl->win[index]); |
e2ebc833 SG |
1288 | u32 sz = (sizeof(struct il_scale_tbl_info) - |
1289 | (sizeof(struct il_rate_scale_data) * IL_RATE_COUNT)); | |
be663ab6 | 1290 | u8 start_action; |
46bc8d4b SG |
1291 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1292 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1293 | int ret = 0; |
1294 | u8 update_search_tbl_counter = 0; | |
1295 | ||
e2ebc833 | 1296 | tbl->action = IL_LEGACY_SWITCH_SISO; |
be663ab6 WYG |
1297 | |
1298 | start_action = tbl->action; | |
1299 | for (; ;) { | |
1300 | lq_sta->action_counter++; | |
1301 | switch (tbl->action) { | |
e2ebc833 SG |
1302 | case IL_LEGACY_SWITCH_ANTENNA1: |
1303 | case IL_LEGACY_SWITCH_ANTENNA2: | |
58de00a4 | 1304 | D_RATE("LQ: Legacy toggle Antenna\n"); |
be663ab6 | 1305 | |
e2ebc833 | 1306 | if ((tbl->action == IL_LEGACY_SWITCH_ANTENNA1 && |
be663ab6 | 1307 | tx_chains_num <= 1) || |
e2ebc833 | 1308 | (tbl->action == IL_LEGACY_SWITCH_ANTENNA2 && |
be663ab6 WYG |
1309 | tx_chains_num <= 2)) |
1310 | break; | |
1311 | ||
1312 | /* Don't change antenna if success has been great */ | |
6ce1dc45 | 1313 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1314 | break; |
1315 | ||
1316 | /* Set up search table to try other antenna */ | |
1317 | memcpy(search_tbl, tbl, sz); | |
1318 | ||
e2ebc833 | 1319 | if (il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
1320 | &search_tbl->current_rate, search_tbl)) { |
1321 | update_search_tbl_counter = 1; | |
e2ebc833 | 1322 | il4965_rs_set_expected_tpt_table(lq_sta, |
be663ab6 WYG |
1323 | search_tbl); |
1324 | goto out; | |
1325 | } | |
1326 | break; | |
e2ebc833 | 1327 | case IL_LEGACY_SWITCH_SISO: |
58de00a4 | 1328 | D_RATE("LQ: Legacy switch to SISO\n"); |
be663ab6 WYG |
1329 | |
1330 | /* Set up search table to try SISO */ | |
1331 | memcpy(search_tbl, tbl, sz); | |
1332 | search_tbl->is_SGI = 0; | |
46bc8d4b | 1333 | ret = il4965_rs_switch_to_siso(il, lq_sta, conf, sta, |
be663ab6 WYG |
1334 | search_tbl, index); |
1335 | if (!ret) { | |
1336 | lq_sta->action_counter = 0; | |
1337 | goto out; | |
1338 | } | |
1339 | ||
1340 | break; | |
e2ebc833 SG |
1341 | case IL_LEGACY_SWITCH_MIMO2_AB: |
1342 | case IL_LEGACY_SWITCH_MIMO2_AC: | |
1343 | case IL_LEGACY_SWITCH_MIMO2_BC: | |
58de00a4 | 1344 | D_RATE("LQ: Legacy switch to MIMO2\n"); |
be663ab6 WYG |
1345 | |
1346 | /* Set up search table to try MIMO */ | |
1347 | memcpy(search_tbl, tbl, sz); | |
1348 | search_tbl->is_SGI = 0; | |
1349 | ||
e2ebc833 | 1350 | if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AB) |
be663ab6 | 1351 | search_tbl->ant_type = ANT_AB; |
e2ebc833 | 1352 | else if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AC) |
be663ab6 WYG |
1353 | search_tbl->ant_type = ANT_AC; |
1354 | else | |
1355 | search_tbl->ant_type = ANT_BC; | |
1356 | ||
e2ebc833 | 1357 | if (!il4965_rs_is_valid_ant(valid_tx_ant, |
be663ab6 WYG |
1358 | search_tbl->ant_type)) |
1359 | break; | |
1360 | ||
46bc8d4b | 1361 | ret = il4965_rs_switch_to_mimo2(il, lq_sta, |
be663ab6 WYG |
1362 | conf, sta, |
1363 | search_tbl, index); | |
1364 | if (!ret) { | |
1365 | lq_sta->action_counter = 0; | |
1366 | goto out; | |
1367 | } | |
1368 | break; | |
1369 | } | |
1370 | tbl->action++; | |
e2ebc833 SG |
1371 | if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
1372 | tbl->action = IL_LEGACY_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1373 | |
1374 | if (tbl->action == start_action) | |
1375 | break; | |
1376 | ||
1377 | } | |
1378 | search_tbl->lq_type = LQ_NONE; | |
1379 | return 0; | |
1380 | ||
1381 | out: | |
1382 | lq_sta->search_better_tbl = 1; | |
1383 | tbl->action++; | |
e2ebc833 SG |
1384 | if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
1385 | tbl->action = IL_LEGACY_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1386 | if (update_search_tbl_counter) |
1387 | search_tbl->action = tbl->action; | |
1388 | return 0; | |
1389 | ||
1390 | } | |
1391 | ||
1392 | /* | |
1393 | * Try to switch to new modulation mode from SISO | |
1394 | */ | |
46bc8d4b | 1395 | static int il4965_rs_move_siso_to_other(struct il_priv *il, |
e2ebc833 | 1396 | struct il_lq_sta *lq_sta, |
be663ab6 WYG |
1397 | struct ieee80211_conf *conf, |
1398 | struct ieee80211_sta *sta, int index) | |
1399 | { | |
1400 | u8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1401 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1402 | struct il_scale_tbl_info *search_tbl = | |
be663ab6 | 1403 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
6ce1dc45 | 1404 | struct il_rate_scale_data *win = &(tbl->win[index]); |
be663ab6 | 1405 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e2ebc833 SG |
1406 | u32 sz = (sizeof(struct il_scale_tbl_info) - |
1407 | (sizeof(struct il_rate_scale_data) * IL_RATE_COUNT)); | |
be663ab6 | 1408 | u8 start_action; |
46bc8d4b SG |
1409 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1410 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1411 | u8 update_search_tbl_counter = 0; |
1412 | int ret; | |
1413 | ||
1414 | start_action = tbl->action; | |
1415 | ||
1416 | for (;;) { | |
1417 | lq_sta->action_counter++; | |
1418 | switch (tbl->action) { | |
e2ebc833 SG |
1419 | case IL_SISO_SWITCH_ANTENNA1: |
1420 | case IL_SISO_SWITCH_ANTENNA2: | |
58de00a4 | 1421 | D_RATE("LQ: SISO toggle Antenna\n"); |
e2ebc833 | 1422 | if ((tbl->action == IL_SISO_SWITCH_ANTENNA1 && |
be663ab6 | 1423 | tx_chains_num <= 1) || |
e2ebc833 | 1424 | (tbl->action == IL_SISO_SWITCH_ANTENNA2 && |
be663ab6 WYG |
1425 | tx_chains_num <= 2)) |
1426 | break; | |
1427 | ||
6ce1dc45 | 1428 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1429 | break; |
1430 | ||
1431 | memcpy(search_tbl, tbl, sz); | |
e2ebc833 | 1432 | if (il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
1433 | &search_tbl->current_rate, search_tbl)) { |
1434 | update_search_tbl_counter = 1; | |
1435 | goto out; | |
1436 | } | |
1437 | break; | |
e2ebc833 SG |
1438 | case IL_SISO_SWITCH_MIMO2_AB: |
1439 | case IL_SISO_SWITCH_MIMO2_AC: | |
1440 | case IL_SISO_SWITCH_MIMO2_BC: | |
58de00a4 | 1441 | D_RATE("LQ: SISO switch to MIMO2\n"); |
be663ab6 WYG |
1442 | memcpy(search_tbl, tbl, sz); |
1443 | search_tbl->is_SGI = 0; | |
1444 | ||
e2ebc833 | 1445 | if (tbl->action == IL_SISO_SWITCH_MIMO2_AB) |
be663ab6 | 1446 | search_tbl->ant_type = ANT_AB; |
e2ebc833 | 1447 | else if (tbl->action == IL_SISO_SWITCH_MIMO2_AC) |
be663ab6 WYG |
1448 | search_tbl->ant_type = ANT_AC; |
1449 | else | |
1450 | search_tbl->ant_type = ANT_BC; | |
1451 | ||
e2ebc833 | 1452 | if (!il4965_rs_is_valid_ant(valid_tx_ant, |
be663ab6 WYG |
1453 | search_tbl->ant_type)) |
1454 | break; | |
1455 | ||
46bc8d4b | 1456 | ret = il4965_rs_switch_to_mimo2(il, lq_sta, |
be663ab6 WYG |
1457 | conf, sta, |
1458 | search_tbl, index); | |
1459 | if (!ret) | |
1460 | goto out; | |
1461 | break; | |
e2ebc833 | 1462 | case IL_SISO_SWITCH_GI: |
be663ab6 WYG |
1463 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1464 | IEEE80211_HT_CAP_SGI_20)) | |
1465 | break; | |
1466 | if (tbl->is_ht40 && !(ht_cap->cap & | |
1467 | IEEE80211_HT_CAP_SGI_40)) | |
1468 | break; | |
1469 | ||
58de00a4 | 1470 | D_RATE("LQ: SISO toggle SGI/NGI\n"); |
be663ab6 WYG |
1471 | |
1472 | memcpy(search_tbl, tbl, sz); | |
1473 | if (is_green) { | |
1474 | if (!tbl->is_SGI) | |
1475 | break; | |
1476 | else | |
9406f797 | 1477 | IL_ERR( |
be663ab6 WYG |
1478 | "SGI was set in GF+SISO\n"); |
1479 | } | |
1480 | search_tbl->is_SGI = !tbl->is_SGI; | |
e2ebc833 | 1481 | il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
be663ab6 WYG |
1482 | if (tbl->is_SGI) { |
1483 | s32 tpt = lq_sta->last_tpt / 100; | |
1484 | if (tpt >= search_tbl->expected_tpt[index]) | |
1485 | break; | |
1486 | } | |
1487 | search_tbl->current_rate = | |
46bc8d4b | 1488 | il4965_rate_n_flags_from_tbl(il, search_tbl, |
be663ab6 WYG |
1489 | index, is_green); |
1490 | update_search_tbl_counter = 1; | |
1491 | goto out; | |
1492 | } | |
1493 | tbl->action++; | |
e2ebc833 SG |
1494 | if (tbl->action > IL_SISO_SWITCH_GI) |
1495 | tbl->action = IL_SISO_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1496 | |
1497 | if (tbl->action == start_action) | |
1498 | break; | |
1499 | } | |
1500 | search_tbl->lq_type = LQ_NONE; | |
1501 | return 0; | |
1502 | ||
1503 | out: | |
1504 | lq_sta->search_better_tbl = 1; | |
1505 | tbl->action++; | |
e2ebc833 SG |
1506 | if (tbl->action > IL_SISO_SWITCH_GI) |
1507 | tbl->action = IL_SISO_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1508 | if (update_search_tbl_counter) |
1509 | search_tbl->action = tbl->action; | |
1510 | ||
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * Try to switch to new modulation mode from MIMO2 | |
1516 | */ | |
46bc8d4b | 1517 | static int il4965_rs_move_mimo2_to_other(struct il_priv *il, |
e2ebc833 | 1518 | struct il_lq_sta *lq_sta, |
be663ab6 WYG |
1519 | struct ieee80211_conf *conf, |
1520 | struct ieee80211_sta *sta, int index) | |
1521 | { | |
1522 | s8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1523 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1524 | struct il_scale_tbl_info *search_tbl = | |
be663ab6 | 1525 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
6ce1dc45 | 1526 | struct il_rate_scale_data *win = &(tbl->win[index]); |
be663ab6 | 1527 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e2ebc833 SG |
1528 | u32 sz = (sizeof(struct il_scale_tbl_info) - |
1529 | (sizeof(struct il_rate_scale_data) * IL_RATE_COUNT)); | |
be663ab6 | 1530 | u8 start_action; |
46bc8d4b SG |
1531 | u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
1532 | u8 tx_chains_num = il->hw_params.tx_chains_num; | |
be663ab6 WYG |
1533 | u8 update_search_tbl_counter = 0; |
1534 | int ret; | |
1535 | ||
1536 | start_action = tbl->action; | |
1537 | for (;;) { | |
1538 | lq_sta->action_counter++; | |
1539 | switch (tbl->action) { | |
e2ebc833 SG |
1540 | case IL_MIMO2_SWITCH_ANTENNA1: |
1541 | case IL_MIMO2_SWITCH_ANTENNA2: | |
58de00a4 | 1542 | D_RATE("LQ: MIMO2 toggle Antennas\n"); |
be663ab6 WYG |
1543 | |
1544 | if (tx_chains_num <= 2) | |
1545 | break; | |
1546 | ||
6ce1dc45 | 1547 | if (win->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1548 | break; |
1549 | ||
1550 | memcpy(search_tbl, tbl, sz); | |
e2ebc833 | 1551 | if (il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
1552 | &search_tbl->current_rate, search_tbl)) { |
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 | ||
e2ebc833 | 1572 | if (!il4965_rs_is_valid_ant(valid_tx_ant, |
be663ab6 WYG |
1573 | search_tbl->ant_type)) |
1574 | break; | |
1575 | ||
46bc8d4b | 1576 | ret = il4965_rs_switch_to_siso(il, lq_sta, |
be663ab6 WYG |
1577 | conf, sta, |
1578 | search_tbl, index); | |
1579 | if (!ret) | |
1580 | goto out; | |
1581 | ||
1582 | break; | |
1583 | ||
e2ebc833 | 1584 | case IL_MIMO2_SWITCH_GI: |
be663ab6 WYG |
1585 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1586 | IEEE80211_HT_CAP_SGI_20)) | |
1587 | break; | |
1588 | if (tbl->is_ht40 && !(ht_cap->cap & | |
1589 | IEEE80211_HT_CAP_SGI_40)) | |
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; | |
1606 | if (tpt >= search_tbl->expected_tpt[index]) | |
1607 | break; | |
1608 | } | |
1609 | search_tbl->current_rate = | |
46bc8d4b | 1610 | il4965_rate_n_flags_from_tbl(il, search_tbl, |
be663ab6 WYG |
1611 | index, is_green); |
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; | |
1625 | out: | |
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 = | |
1664 | time_after(jiffies, | |
1665 | (unsigned long)(lq_sta->flush_timer + | |
e2ebc833 | 1666 | IL_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)) { | |
58de00a4 | 1681 | D_RATE("LQ: stay is expired %d %d %d\n:", |
be663ab6 WYG |
1682 | lq_sta->total_failed, |
1683 | lq_sta->total_success, | |
1684 | flush_interval_passed); | |
1685 | ||
1686 | /* Allow search for new mode */ | |
1687 | lq_sta->stay_in_tbl = 0; /* only place reset */ | |
1688 | lq_sta->total_failed = 0; | |
1689 | lq_sta->total_success = 0; | |
1690 | lq_sta->flush_timer = 0; | |
1691 | ||
1692 | /* | |
1693 | * Else if we've used this modulation mode enough repetitions | |
1694 | * (regardless of elapsed time or success/failure), reset | |
1695 | * history bitmaps and rate-specific stats for all rates in | |
1696 | * active table. | |
1697 | */ | |
1698 | } else { | |
1699 | lq_sta->table_count++; | |
1700 | if (lq_sta->table_count >= | |
1701 | lq_sta->table_count_limit) { | |
1702 | lq_sta->table_count = 0; | |
1703 | ||
58de00a4 | 1704 | D_RATE( |
be663ab6 | 1705 | "LQ: stay in table clear win\n"); |
e2ebc833 | 1706 | for (i = 0; i < IL_RATE_COUNT; i++) |
6ce1dc45 | 1707 | il4965_rs_rate_scale_clear_win( |
be663ab6 WYG |
1708 | &(tbl->win[i])); |
1709 | } | |
1710 | } | |
1711 | ||
1712 | /* If transitioning to allow "search", reset all history | |
1713 | * bitmaps and stats in active table (this will become the new | |
1714 | * "search" table). */ | |
1715 | if (!lq_sta->stay_in_tbl) { | |
e2ebc833 | 1716 | for (i = 0; i < IL_RATE_COUNT; i++) |
6ce1dc45 | 1717 | il4965_rs_rate_scale_clear_win( |
be663ab6 WYG |
1718 | &(tbl->win[i])); |
1719 | } | |
1720 | } | |
1721 | } | |
1722 | ||
1723 | /* | |
1724 | * setup rate table in uCode | |
1725 | * return rate_n_flags as used in the table | |
1726 | */ | |
46bc8d4b | 1727 | static u32 il4965_rs_update_rate_tbl(struct il_priv *il, |
e2ebc833 SG |
1728 | struct il_rxon_context *ctx, |
1729 | struct il_lq_sta *lq_sta, | |
1730 | struct il_scale_tbl_info *tbl, | |
be663ab6 WYG |
1731 | int index, u8 is_green) |
1732 | { | |
1733 | u32 rate; | |
1734 | ||
1735 | /* Update uCode's rate table. */ | |
46bc8d4b SG |
1736 | rate = il4965_rate_n_flags_from_tbl(il, tbl, index, is_green); |
1737 | il4965_rs_fill_link_cmd(il, lq_sta, rate); | |
1738 | il_send_lq_cmd(il, ctx, &lq_sta->lq, CMD_ASYNC, false); | |
be663ab6 WYG |
1739 | |
1740 | return rate; | |
1741 | } | |
1742 | ||
1743 | /* | |
1744 | * Do rate scaling and search for new modulation mode. | |
1745 | */ | |
46bc8d4b | 1746 | static void il4965_rs_rate_scale_perform(struct il_priv *il, |
be663ab6 WYG |
1747 | struct sk_buff *skb, |
1748 | struct ieee80211_sta *sta, | |
e2ebc833 | 1749 | struct il_lq_sta *lq_sta) |
be663ab6 | 1750 | { |
46bc8d4b | 1751 | struct ieee80211_hw *hw = il->hw; |
be663ab6 WYG |
1752 | struct ieee80211_conf *conf = &hw->conf; |
1753 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1754 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
e2ebc833 SG |
1755 | int low = IL_RATE_INVALID; |
1756 | int high = IL_RATE_INVALID; | |
be663ab6 WYG |
1757 | int index; |
1758 | int i; | |
6ce1dc45 | 1759 | struct il_rate_scale_data *win = NULL; |
e2ebc833 SG |
1760 | int current_tpt = IL_INVALID_VALUE; |
1761 | int low_tpt = IL_INVALID_VALUE; | |
1762 | int high_tpt = IL_INVALID_VALUE; | |
be663ab6 WYG |
1763 | u32 fail_count; |
1764 | s8 scale_action = 0; | |
1765 | u16 rate_mask; | |
1766 | u8 update_lq = 0; | |
e2ebc833 | 1767 | struct il_scale_tbl_info *tbl, *tbl1; |
be663ab6 WYG |
1768 | u16 rate_scale_index_msk = 0; |
1769 | u32 rate; | |
1770 | u8 is_green = 0; | |
1771 | u8 active_tbl = 0; | |
1772 | u8 done_search = 0; | |
1773 | u16 high_low; | |
1774 | s32 sr; | |
1775 | u8 tid = MAX_TID_COUNT; | |
e2ebc833 SG |
1776 | struct il_tid_data *tid_data; |
1777 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; | |
1778 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 | 1779 | |
58de00a4 | 1780 | D_RATE("rate scale calculate new rate for skb\n"); |
be663ab6 WYG |
1781 | |
1782 | /* Send management frames and NO_ACK data using lowest rate. */ | |
1783 | /* TODO: this could probably be improved.. */ | |
1784 | if (!ieee80211_is_data(hdr->frame_control) || | |
232913b5 | 1785 | (info->flags & IEEE80211_TX_CTL_NO_ACK)) |
be663ab6 WYG |
1786 | return; |
1787 | ||
1788 | if (!sta || !lq_sta) | |
1789 | return; | |
1790 | ||
1791 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; | |
1792 | ||
e2ebc833 | 1793 | tid = il4965_rs_tl_add_packet(lq_sta, hdr); |
232913b5 | 1794 | if (tid != MAX_TID_COUNT && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
46bc8d4b | 1795 | tid_data = &il->stations[lq_sta->lq.sta_id].tid[tid]; |
e2ebc833 | 1796 | if (tid_data->agg.state == IL_AGG_OFF) |
be663ab6 WYG |
1797 | lq_sta->is_agg = 0; |
1798 | else | |
1799 | lq_sta->is_agg = 1; | |
1800 | } else | |
1801 | lq_sta->is_agg = 0; | |
1802 | ||
1803 | /* | |
1804 | * Select rate-scale / modulation-mode table to work with in | |
1805 | * the rest of this function: "search" if searching for better | |
1806 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1807 | */ | |
1808 | if (!lq_sta->search_better_tbl) | |
1809 | active_tbl = lq_sta->active_tbl; | |
1810 | else | |
1811 | active_tbl = 1 - lq_sta->active_tbl; | |
1812 | ||
1813 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1814 | if (is_legacy(tbl->lq_type)) | |
1815 | lq_sta->is_green = 0; | |
1816 | else | |
e2ebc833 | 1817 | lq_sta->is_green = il4965_rs_use_green(sta); |
be663ab6 WYG |
1818 | is_green = lq_sta->is_green; |
1819 | ||
1820 | /* current tx rate */ | |
1821 | index = lq_sta->last_txrate_idx; | |
1822 | ||
58de00a4 | 1823 | D_RATE("Rate scale index %d for type %d\n", index, |
be663ab6 WYG |
1824 | tbl->lq_type); |
1825 | ||
1826 | /* rates available for this association, and for modulation mode */ | |
e2ebc833 | 1827 | rate_mask = il4965_rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
be663ab6 | 1828 | |
58de00a4 | 1829 | D_RATE("mask 0x%04X\n", rate_mask); |
be663ab6 WYG |
1830 | |
1831 | /* mask with station rate restriction */ | |
1832 | if (is_legacy(tbl->lq_type)) { | |
1833 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1834 | /* supp_rates has no CCK bits in A mode */ | |
1835 | rate_scale_index_msk = (u16) (rate_mask & | |
e2ebc833 | 1836 | (lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); |
be663ab6 WYG |
1837 | else |
1838 | rate_scale_index_msk = (u16) (rate_mask & | |
1839 | lq_sta->supp_rates); | |
1840 | ||
1841 | } else | |
1842 | rate_scale_index_msk = rate_mask; | |
1843 | ||
1844 | if (!rate_scale_index_msk) | |
1845 | rate_scale_index_msk = rate_mask; | |
1846 | ||
1847 | if (!((1 << index) & rate_scale_index_msk)) { | |
9406f797 | 1848 | IL_ERR("Current Rate is not valid\n"); |
be663ab6 WYG |
1849 | if (lq_sta->search_better_tbl) { |
1850 | /* revert to active table if search table is not valid*/ | |
1851 | tbl->lq_type = LQ_NONE; | |
1852 | lq_sta->search_better_tbl = 0; | |
1853 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1854 | /* get "active" rate info */ | |
e2ebc833 | 1855 | index = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
46bc8d4b | 1856 | rate = il4965_rs_update_rate_tbl(il, ctx, lq_sta, |
be663ab6 WYG |
1857 | tbl, index, is_green); |
1858 | } | |
1859 | return; | |
1860 | } | |
1861 | ||
6ce1dc45 | 1862 | /* Get expected throughput table and history win for current rate */ |
be663ab6 | 1863 | if (!tbl->expected_tpt) { |
9406f797 | 1864 | IL_ERR("tbl->expected_tpt is NULL\n"); |
be663ab6 WYG |
1865 | return; |
1866 | } | |
1867 | ||
1868 | /* force user max rate if set by user */ | |
232913b5 SG |
1869 | if (lq_sta->max_rate_idx != -1 && |
1870 | lq_sta->max_rate_idx < index) { | |
be663ab6 WYG |
1871 | index = lq_sta->max_rate_idx; |
1872 | update_lq = 1; | |
6ce1dc45 | 1873 | win = &(tbl->win[index]); |
be663ab6 WYG |
1874 | goto lq_update; |
1875 | } | |
1876 | ||
6ce1dc45 | 1877 | win = &(tbl->win[index]); |
be663ab6 WYG |
1878 | |
1879 | /* | |
1880 | * If there is not enough history to calculate actual average | |
1881 | * throughput, keep analyzing results of more tx frames, without | |
1882 | * changing rate or mode (bypass most of the rest of this function). | |
1883 | * Set up new rate table in uCode only if old rate is not supported | |
1884 | * in current association (use new rate found above). | |
1885 | */ | |
6ce1dc45 | 1886 | fail_count = win->counter - win->success_counter; |
232913b5 | 1887 | if (fail_count < IL_RATE_MIN_FAILURE_TH && |
6ce1dc45 | 1888 | win->success_counter < IL_RATE_MIN_SUCCESS_TH) { |
58de00a4 | 1889 | D_RATE("LQ: still below TH. succ=%d total=%d " |
be663ab6 | 1890 | "for index %d\n", |
6ce1dc45 | 1891 | win->success_counter, win->counter, index); |
be663ab6 WYG |
1892 | |
1893 | /* Can't calculate this yet; not enough history */ | |
6ce1dc45 | 1894 | win->average_tpt = IL_INVALID_VALUE; |
be663ab6 WYG |
1895 | |
1896 | /* Should we stay with this modulation mode, | |
1897 | * or search for a new one? */ | |
e2ebc833 | 1898 | il4965_rs_stay_in_table(lq_sta, false); |
be663ab6 WYG |
1899 | |
1900 | goto out; | |
1901 | } | |
1902 | /* Else we have enough samples; calculate estimate of | |
1903 | * actual average throughput */ | |
6ce1dc45 | 1904 | if (win->average_tpt != ((win->success_ratio * |
be663ab6 | 1905 | tbl->expected_tpt[index] + 64) / 128)) { |
9406f797 | 1906 | IL_ERR( |
be663ab6 | 1907 | "expected_tpt should have been calculated by now\n"); |
6ce1dc45 | 1908 | win->average_tpt = ((win->success_ratio * |
be663ab6 WYG |
1909 | tbl->expected_tpt[index] + 64) / 128); |
1910 | } | |
1911 | ||
1912 | /* If we are searching for better modulation mode, check success. */ | |
1913 | if (lq_sta->search_better_tbl) { | |
1914 | /* If good success, continue using the "search" mode; | |
1915 | * no need to send new link quality command, since we're | |
1916 | * continuing to use the setup that we've been trying. */ | |
6ce1dc45 | 1917 | if (win->average_tpt > lq_sta->last_tpt) { |
be663ab6 | 1918 | |
58de00a4 | 1919 | D_RATE("LQ: SWITCHING TO NEW TABLE " |
be663ab6 | 1920 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
6ce1dc45 SG |
1921 | win->success_ratio, |
1922 | win->average_tpt, | |
be663ab6 WYG |
1923 | lq_sta->last_tpt); |
1924 | ||
1925 | if (!is_legacy(tbl->lq_type)) | |
1926 | lq_sta->enable_counter = 1; | |
1927 | ||
1928 | /* Swap tables; "search" becomes "active" */ | |
1929 | lq_sta->active_tbl = active_tbl; | |
6ce1dc45 | 1930 | current_tpt = win->average_tpt; |
be663ab6 WYG |
1931 | |
1932 | /* Else poor success; go back to mode in "active" table */ | |
1933 | } else { | |
1934 | ||
58de00a4 | 1935 | D_RATE("LQ: GOING BACK TO THE OLD TABLE " |
be663ab6 | 1936 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
6ce1dc45 SG |
1937 | win->success_ratio, |
1938 | win->average_tpt, | |
be663ab6 WYG |
1939 | lq_sta->last_tpt); |
1940 | ||
1941 | /* Nullify "search" table */ | |
1942 | tbl->lq_type = LQ_NONE; | |
1943 | ||
1944 | /* Revert to "active" table */ | |
1945 | active_tbl = lq_sta->active_tbl; | |
1946 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1947 | ||
1948 | /* Revert to "active" rate and throughput info */ | |
e2ebc833 | 1949 | index = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
be663ab6 WYG |
1950 | current_tpt = lq_sta->last_tpt; |
1951 | ||
1952 | /* Need to set up a new rate table in uCode */ | |
1953 | update_lq = 1; | |
1954 | } | |
1955 | ||
1956 | /* Either way, we've made a decision; modulation mode | |
1957 | * search is done, allow rate adjustment next time. */ | |
1958 | lq_sta->search_better_tbl = 0; | |
1959 | done_search = 1; /* Don't switch modes below! */ | |
1960 | goto lq_update; | |
1961 | } | |
1962 | ||
1963 | /* (Else) not in search of better modulation mode, try for better | |
1964 | * starting rate, while staying in this mode. */ | |
46bc8d4b | 1965 | high_low = il4965_rs_get_adjacent_rate(il, index, |
be663ab6 WYG |
1966 | rate_scale_index_msk, |
1967 | tbl->lq_type); | |
1968 | low = high_low & 0xff; | |
1969 | high = (high_low >> 8) & 0xff; | |
1970 | ||
1971 | /* If user set max rate, dont allow higher than user constrain */ | |
232913b5 SG |
1972 | if (lq_sta->max_rate_idx != -1 && |
1973 | lq_sta->max_rate_idx < high) | |
e2ebc833 | 1974 | high = IL_RATE_INVALID; |
be663ab6 | 1975 | |
6ce1dc45 | 1976 | sr = win->success_ratio; |
be663ab6 WYG |
1977 | |
1978 | /* Collect measured throughputs for current and adjacent rates */ | |
6ce1dc45 | 1979 | current_tpt = win->average_tpt; |
e2ebc833 | 1980 | if (low != IL_RATE_INVALID) |
be663ab6 | 1981 | low_tpt = tbl->win[low].average_tpt; |
e2ebc833 | 1982 | if (high != IL_RATE_INVALID) |
be663ab6 WYG |
1983 | high_tpt = tbl->win[high].average_tpt; |
1984 | ||
1985 | scale_action = 0; | |
1986 | ||
1987 | /* Too many failures, decrease rate */ | |
232913b5 | 1988 | if (sr <= IL_RATE_DECREASE_TH || current_tpt == 0) { |
58de00a4 | 1989 | D_RATE( |
be663ab6 WYG |
1990 | "decrease rate because of low success_ratio\n"); |
1991 | scale_action = -1; | |
1992 | ||
1993 | /* No throughput measured yet for adjacent rates; try increase. */ | |
232913b5 SG |
1994 | } else if (low_tpt == IL_INVALID_VALUE && |
1995 | high_tpt == IL_INVALID_VALUE) { | |
be663ab6 | 1996 | |
e2ebc833 | 1997 | if (high != IL_RATE_INVALID && sr >= IL_RATE_INCREASE_TH) |
be663ab6 | 1998 | scale_action = 1; |
e2ebc833 | 1999 | else if (low != IL_RATE_INVALID) |
be663ab6 WYG |
2000 | scale_action = 0; |
2001 | } | |
2002 | ||
2003 | /* Both adjacent throughputs are measured, but neither one has better | |
2004 | * throughput; we're using the best rate, don't change it! */ | |
232913b5 SG |
2005 | else if (low_tpt != IL_INVALID_VALUE && high_tpt != IL_INVALID_VALUE && |
2006 | low_tpt < current_tpt && high_tpt < current_tpt) | |
be663ab6 WYG |
2007 | scale_action = 0; |
2008 | ||
2009 | /* At least one adjacent rate's throughput is measured, | |
2010 | * and may have better performance. */ | |
2011 | else { | |
2012 | /* Higher adjacent rate's throughput is measured */ | |
e2ebc833 | 2013 | if (high_tpt != IL_INVALID_VALUE) { |
be663ab6 WYG |
2014 | /* Higher rate has better throughput */ |
2015 | if (high_tpt > current_tpt && | |
232913b5 | 2016 | sr >= IL_RATE_INCREASE_TH) { |
be663ab6 WYG |
2017 | scale_action = 1; |
2018 | } else { | |
2019 | scale_action = 0; | |
2020 | } | |
2021 | ||
2022 | /* Lower adjacent rate's throughput is measured */ | |
e2ebc833 | 2023 | } else if (low_tpt != IL_INVALID_VALUE) { |
be663ab6 WYG |
2024 | /* Lower rate has better throughput */ |
2025 | if (low_tpt > current_tpt) { | |
58de00a4 | 2026 | D_RATE( |
be663ab6 WYG |
2027 | "decrease rate because of low tpt\n"); |
2028 | scale_action = -1; | |
e2ebc833 | 2029 | } else if (sr >= IL_RATE_INCREASE_TH) { |
be663ab6 WYG |
2030 | scale_action = 1; |
2031 | } | |
2032 | } | |
2033 | } | |
2034 | ||
2035 | /* Sanity check; asked for decrease, but success rate or throughput | |
2036 | * has been good at old rate. Don't change it. */ | |
232913b5 SG |
2037 | if (scale_action == -1 && low != IL_RATE_INVALID && |
2038 | (sr > IL_RATE_HIGH_TH || current_tpt > 100 * tbl->expected_tpt[low])) | |
be663ab6 WYG |
2039 | scale_action = 0; |
2040 | ||
2041 | switch (scale_action) { | |
2042 | case -1: | |
2043 | /* Decrease starting rate, update uCode's rate table */ | |
e2ebc833 | 2044 | if (low != IL_RATE_INVALID) { |
be663ab6 WYG |
2045 | update_lq = 1; |
2046 | index = low; | |
2047 | } | |
2048 | ||
2049 | break; | |
2050 | case 1: | |
2051 | /* Increase starting rate, update uCode's rate table */ | |
e2ebc833 | 2052 | if (high != IL_RATE_INVALID) { |
be663ab6 WYG |
2053 | update_lq = 1; |
2054 | index = high; | |
2055 | } | |
2056 | ||
2057 | break; | |
2058 | case 0: | |
2059 | /* No change */ | |
2060 | default: | |
2061 | break; | |
2062 | } | |
2063 | ||
58de00a4 | 2064 | D_RATE("choose rate scale index %d action %d low %d " |
be663ab6 WYG |
2065 | "high %d type %d\n", |
2066 | index, scale_action, low, high, tbl->lq_type); | |
2067 | ||
2068 | lq_update: | |
2069 | /* Replace uCode's rate table for the destination station. */ | |
2070 | if (update_lq) | |
46bc8d4b | 2071 | rate = il4965_rs_update_rate_tbl(il, ctx, lq_sta, |
be663ab6 WYG |
2072 | tbl, index, is_green); |
2073 | ||
2074 | /* Should we stay with this modulation mode, | |
2075 | * or search for a new one? */ | |
e2ebc833 | 2076 | il4965_rs_stay_in_table(lq_sta, false); |
be663ab6 WYG |
2077 | |
2078 | /* | |
2079 | * Search for new modulation mode if we're: | |
2080 | * 1) Not changing rates right now | |
2081 | * 2) Not just finishing up a search | |
2082 | * 3) Allowing a new search | |
2083 | */ | |
232913b5 | 2084 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && |
6ce1dc45 | 2085 | win->counter) { |
be663ab6 WYG |
2086 | /* Save current throughput to compare with "search" throughput*/ |
2087 | lq_sta->last_tpt = current_tpt; | |
2088 | ||
2089 | /* Select a new "search" modulation mode to try. | |
2090 | * If one is found, set up the new "search" table. */ | |
2091 | if (is_legacy(tbl->lq_type)) | |
46bc8d4b | 2092 | il4965_rs_move_legacy_other(il, lq_sta, |
be663ab6 WYG |
2093 | conf, sta, index); |
2094 | else if (is_siso(tbl->lq_type)) | |
46bc8d4b | 2095 | il4965_rs_move_siso_to_other(il, lq_sta, |
be663ab6 WYG |
2096 | conf, sta, index); |
2097 | else /* (is_mimo2(tbl->lq_type)) */ | |
46bc8d4b | 2098 | il4965_rs_move_mimo2_to_other(il, lq_sta, |
be663ab6 WYG |
2099 | conf, sta, index); |
2100 | ||
2101 | /* If new "search" mode was selected, set up in uCode table */ | |
2102 | if (lq_sta->search_better_tbl) { | |
2103 | /* Access the "search" table, clear its history. */ | |
2104 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
e2ebc833 | 2105 | for (i = 0; i < IL_RATE_COUNT; i++) |
6ce1dc45 | 2106 | il4965_rs_rate_scale_clear_win( |
be663ab6 WYG |
2107 | &(tbl->win[i])); |
2108 | ||
2109 | /* Use new "search" start rate */ | |
e2ebc833 | 2110 | index = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
be663ab6 | 2111 | |
58de00a4 | 2112 | D_RATE( |
be663ab6 WYG |
2113 | "Switch current mcs: %X index: %d\n", |
2114 | tbl->current_rate, index); | |
46bc8d4b | 2115 | il4965_rs_fill_link_cmd(il, lq_sta, |
be663ab6 | 2116 | tbl->current_rate); |
46bc8d4b | 2117 | il_send_lq_cmd(il, ctx, |
be663ab6 WYG |
2118 | &lq_sta->lq, CMD_ASYNC, false); |
2119 | } else | |
2120 | done_search = 1; | |
2121 | } | |
2122 | ||
2123 | if (done_search && !lq_sta->stay_in_tbl) { | |
2124 | /* If the "active" (non-search) mode was legacy, | |
2125 | * and we've tried switching antennas, | |
2126 | * but we haven't been able to try HT modes (not available), | |
2127 | * stay with best antenna legacy modulation for a while | |
2128 | * before next round of mode comparisons. */ | |
2129 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2130 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && | |
2131 | lq_sta->action_counter > tbl1->max_search) { | |
58de00a4 | 2132 | D_RATE("LQ: STAY in legacy table\n"); |
46bc8d4b | 2133 | il4965_rs_set_stay_in_table(il, 1, lq_sta); |
be663ab6 WYG |
2134 | } |
2135 | ||
2136 | /* If we're in an HT mode, and all 3 mode switch actions | |
2137 | * have been tried and compared, stay in this best modulation | |
2138 | * mode for a while before next round of mode comparisons. */ | |
2139 | if (lq_sta->enable_counter && | |
232913b5 SG |
2140 | lq_sta->action_counter >= tbl1->max_search) { |
2141 | if (lq_sta->last_tpt > IL_AGG_TPT_THREHOLD && | |
be663ab6 | 2142 | (lq_sta->tx_agg_tid_en & (1 << tid)) && |
232913b5 | 2143 | tid != MAX_TID_COUNT) { |
be663ab6 | 2144 | tid_data = |
46bc8d4b | 2145 | &il->stations[lq_sta->lq.sta_id].tid[tid]; |
e2ebc833 | 2146 | if (tid_data->agg.state == IL_AGG_OFF) { |
58de00a4 | 2147 | D_RATE( |
be663ab6 WYG |
2148 | "try to aggregate tid %d\n", |
2149 | tid); | |
46bc8d4b | 2150 | il4965_rs_tl_turn_on_agg(il, tid, |
be663ab6 WYG |
2151 | lq_sta, sta); |
2152 | } | |
2153 | } | |
46bc8d4b | 2154 | il4965_rs_set_stay_in_table(il, 0, lq_sta); |
be663ab6 WYG |
2155 | } |
2156 | } | |
2157 | ||
2158 | out: | |
46bc8d4b | 2159 | tbl->current_rate = il4965_rate_n_flags_from_tbl(il, tbl, |
be663ab6 WYG |
2160 | index, is_green); |
2161 | i = index; | |
2162 | lq_sta->last_txrate_idx = i; | |
2163 | } | |
2164 | ||
2165 | /** | |
e2ebc833 | 2166 | * il4965_rs_initialize_lq - Initialize a station's hardware rate table |
be663ab6 WYG |
2167 | * |
2168 | * The uCode's station table contains a table of fallback rates | |
2169 | * for automatic fallback during transmission. | |
2170 | * | |
2171 | * NOTE: This sets up a default set of values. These will be replaced later | |
2172 | * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of | |
2173 | * rc80211_simple. | |
2174 | * | |
2175 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2176 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2177 | * which requires station table entry to exist). | |
2178 | */ | |
46bc8d4b | 2179 | static void il4965_rs_initialize_lq(struct il_priv *il, |
be663ab6 WYG |
2180 | struct ieee80211_conf *conf, |
2181 | struct ieee80211_sta *sta, | |
e2ebc833 | 2182 | struct il_lq_sta *lq_sta) |
be663ab6 | 2183 | { |
e2ebc833 | 2184 | struct il_scale_tbl_info *tbl; |
be663ab6 WYG |
2185 | int rate_idx; |
2186 | int i; | |
2187 | u32 rate; | |
e2ebc833 | 2188 | u8 use_green = il4965_rs_use_green(sta); |
be663ab6 WYG |
2189 | u8 active_tbl = 0; |
2190 | u8 valid_tx_ant; | |
e2ebc833 SG |
2191 | struct il_station_priv *sta_priv; |
2192 | struct il_rxon_context *ctx; | |
be663ab6 WYG |
2193 | |
2194 | if (!sta || !lq_sta) | |
2195 | return; | |
2196 | ||
2197 | sta_priv = (void *)sta->drv_priv; | |
2198 | ctx = sta_priv->common.ctx; | |
2199 | ||
2200 | i = lq_sta->last_txrate_idx; | |
2201 | ||
46bc8d4b | 2202 | valid_tx_ant = il->hw_params.valid_tx_ant; |
be663ab6 WYG |
2203 | |
2204 | if (!lq_sta->search_better_tbl) | |
2205 | active_tbl = lq_sta->active_tbl; | |
2206 | else | |
2207 | active_tbl = 1 - lq_sta->active_tbl; | |
2208 | ||
2209 | tbl = &(lq_sta->lq_info[active_tbl]); | |
2210 | ||
232913b5 | 2211 | if (i < 0 || i >= IL_RATE_COUNT) |
be663ab6 WYG |
2212 | i = 0; |
2213 | ||
d2ddf621 | 2214 | rate = il_rates[i].plcp; |
e2ebc833 | 2215 | tbl->ant_type = il4965_first_antenna(valid_tx_ant); |
be663ab6 WYG |
2216 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; |
2217 | ||
e2ebc833 | 2218 | if (i >= IL_FIRST_CCK_RATE && i <= IL_LAST_CCK_RATE) |
be663ab6 WYG |
2219 | rate |= RATE_MCS_CCK_MSK; |
2220 | ||
46bc8d4b | 2221 | il4965_rs_get_tbl_info_from_mcs(rate, il->band, tbl, &rate_idx); |
e2ebc833 SG |
2222 | if (!il4965_rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2223 | il4965_rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
be663ab6 | 2224 | |
46bc8d4b | 2225 | rate = il4965_rate_n_flags_from_tbl(il, tbl, rate_idx, use_green); |
be663ab6 | 2226 | tbl->current_rate = rate; |
e2ebc833 SG |
2227 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
2228 | il4965_rs_fill_link_cmd(NULL, lq_sta, rate); | |
46bc8d4b SG |
2229 | il->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
2230 | il_send_lq_cmd(il, ctx, &lq_sta->lq, CMD_SYNC, true); | |
be663ab6 WYG |
2231 | } |
2232 | ||
2233 | static void | |
46bc8d4b | 2234 | il4965_rs_get_rate(void *il_r, struct ieee80211_sta *sta, void *il_sta, |
be663ab6 WYG |
2235 | struct ieee80211_tx_rate_control *txrc) |
2236 | { | |
2237 | ||
2238 | struct sk_buff *skb = txrc->skb; | |
2239 | struct ieee80211_supported_band *sband = txrc->sband; | |
46bc8d4b | 2240 | struct il_priv *il __maybe_unused = (struct il_priv *)il_r; |
be663ab6 | 2241 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
46bc8d4b | 2242 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 WYG |
2243 | int rate_idx; |
2244 | ||
58de00a4 | 2245 | D_RATE("rate scale calculate new rate for skb\n"); |
be663ab6 WYG |
2246 | |
2247 | /* Get max rate if user set max rate */ | |
2248 | if (lq_sta) { | |
2249 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
232913b5 SG |
2250 | if (sband->band == IEEE80211_BAND_5GHZ && |
2251 | lq_sta->max_rate_idx != -1) | |
e2ebc833 | 2252 | lq_sta->max_rate_idx += IL_FIRST_OFDM_RATE; |
232913b5 SG |
2253 | if (lq_sta->max_rate_idx < 0 || |
2254 | lq_sta->max_rate_idx >= IL_RATE_COUNT) | |
be663ab6 WYG |
2255 | lq_sta->max_rate_idx = -1; |
2256 | } | |
2257 | ||
2258 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
2259 | if (lq_sta && !lq_sta->drv) { | |
58de00a4 | 2260 | D_RATE("Rate scaling not initialized yet.\n"); |
46bc8d4b | 2261 | il_sta = NULL; |
be663ab6 WYG |
2262 | } |
2263 | ||
2264 | /* Send management frames and NO_ACK data using lowest rate. */ | |
46bc8d4b | 2265 | if (rate_control_send_low(sta, il_sta, txrc)) |
be663ab6 WYG |
2266 | return; |
2267 | ||
0c34861e GD |
2268 | if (!lq_sta) |
2269 | return; | |
2270 | ||
be663ab6 WYG |
2271 | rate_idx = lq_sta->last_txrate_idx; |
2272 | ||
2273 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { | |
e2ebc833 | 2274 | rate_idx -= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2275 | /* 6M and 9M shared same MCS index */ |
2276 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; | |
e2ebc833 SG |
2277 | if (il4965_rs_extract_rate(lq_sta->last_rate_n_flags) >= |
2278 | IL_RATE_MIMO2_6M_PLCP) | |
be663ab6 WYG |
2279 | rate_idx = rate_idx + MCS_INDEX_PER_STREAM; |
2280 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; | |
2281 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2282 | info->control.rates[0].flags |= | |
2283 | IEEE80211_TX_RC_SHORT_GI; | |
2284 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) | |
2285 | info->control.rates[0].flags |= | |
2286 | IEEE80211_TX_RC_DUP_DATA; | |
2287 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) | |
2288 | info->control.rates[0].flags |= | |
2289 | IEEE80211_TX_RC_40_MHZ_WIDTH; | |
2290 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) | |
2291 | info->control.rates[0].flags |= | |
2292 | IEEE80211_TX_RC_GREEN_FIELD; | |
2293 | } else { | |
2294 | /* Check for invalid rates */ | |
232913b5 SG |
2295 | if (rate_idx < 0 || rate_idx >= IL_RATE_COUNT_LEGACY || |
2296 | (sband->band == IEEE80211_BAND_5GHZ && | |
2297 | rate_idx < IL_FIRST_OFDM_RATE)) | |
be663ab6 WYG |
2298 | rate_idx = rate_lowest_index(sband, sta); |
2299 | /* On valid 5 GHz rate, adjust index */ | |
2300 | else if (sband->band == IEEE80211_BAND_5GHZ) | |
e2ebc833 | 2301 | rate_idx -= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2302 | info->control.rates[0].flags = 0; |
2303 | } | |
2304 | info->control.rates[0].idx = rate_idx; | |
2305 | ||
2306 | } | |
2307 | ||
46bc8d4b | 2308 | static void *il4965_rs_alloc_sta(void *il_rate, struct ieee80211_sta *sta, |
be663ab6 WYG |
2309 | gfp_t gfp) |
2310 | { | |
e2ebc833 SG |
2311 | struct il_lq_sta *lq_sta; |
2312 | struct il_station_priv *sta_priv = | |
2313 | (struct il_station_priv *) sta->drv_priv; | |
46bc8d4b | 2314 | struct il_priv *il; |
be663ab6 | 2315 | |
46bc8d4b | 2316 | il = (struct il_priv *)il_rate; |
6ce1dc45 | 2317 | D_RATE("create station rate scale win\n"); |
be663ab6 WYG |
2318 | |
2319 | lq_sta = &sta_priv->lq_sta; | |
2320 | ||
2321 | return lq_sta; | |
2322 | } | |
2323 | ||
2324 | /* | |
2325 | * Called after adding a new station to initialize rate scaling | |
2326 | */ | |
2327 | void | |
46bc8d4b | 2328 | il4965_rs_rate_init(struct il_priv *il, |
be663ab6 WYG |
2329 | struct ieee80211_sta *sta, |
2330 | u8 sta_id) | |
2331 | { | |
2332 | int i, j; | |
46bc8d4b SG |
2333 | struct ieee80211_hw *hw = il->hw; |
2334 | struct ieee80211_conf *conf = &il->hw->conf; | |
be663ab6 | 2335 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e2ebc833 SG |
2336 | struct il_station_priv *sta_priv; |
2337 | struct il_lq_sta *lq_sta; | |
be663ab6 WYG |
2338 | struct ieee80211_supported_band *sband; |
2339 | ||
e2ebc833 | 2340 | sta_priv = (struct il_station_priv *) sta->drv_priv; |
be663ab6 WYG |
2341 | lq_sta = &sta_priv->lq_sta; |
2342 | sband = hw->wiphy->bands[conf->channel->band]; | |
2343 | ||
2344 | ||
2345 | lq_sta->lq.sta_id = sta_id; | |
2346 | ||
2347 | for (j = 0; j < LQ_SIZE; j++) | |
e2ebc833 | 2348 | for (i = 0; i < IL_RATE_COUNT; i++) |
6ce1dc45 | 2349 | il4965_rs_rate_scale_clear_win( |
be663ab6 WYG |
2350 | &lq_sta->lq_info[j].win[i]); |
2351 | ||
2352 | lq_sta->flush_timer = 0; | |
2353 | lq_sta->supp_rates = sta->supp_rates[sband->band]; | |
2354 | for (j = 0; j < LQ_SIZE; j++) | |
e2ebc833 | 2355 | for (i = 0; i < IL_RATE_COUNT; i++) |
6ce1dc45 | 2356 | il4965_rs_rate_scale_clear_win( |
be663ab6 WYG |
2357 | &lq_sta->lq_info[j].win[i]); |
2358 | ||
58de00a4 | 2359 | D_RATE("LQ:" |
be663ab6 WYG |
2360 | "*** rate scale station global init for station %d ***\n", |
2361 | sta_id); | |
2362 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
2363 | * the lowest or the highest rate.. Could consider using RSSI from | |
2364 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2365 | * after assoc.. */ | |
2366 | ||
2367 | lq_sta->is_dup = 0; | |
2368 | lq_sta->max_rate_idx = -1; | |
e2ebc833 SG |
2369 | lq_sta->missed_rate_counter = IL_MISSED_RATE_MAX; |
2370 | lq_sta->is_green = il4965_rs_use_green(sta); | |
46bc8d4b SG |
2371 | lq_sta->active_legacy_rate = il->active_rate & ~(0x1000); |
2372 | lq_sta->band = il->band; | |
be663ab6 WYG |
2373 | /* |
2374 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2375 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2376 | */ | |
2377 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; | |
2378 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
2379 | lq_sta->active_siso_rate &= ~((u16)0x2); | |
e2ebc833 | 2380 | lq_sta->active_siso_rate <<= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2381 | |
2382 | /* Same here */ | |
2383 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; | |
2384 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
2385 | lq_sta->active_mimo2_rate &= ~((u16)0x2); | |
e2ebc833 | 2386 | lq_sta->active_mimo2_rate <<= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2387 | |
2388 | /* These values will be overridden later */ | |
2389 | lq_sta->lq.general_params.single_stream_ant_msk = | |
46bc8d4b | 2390 | il4965_first_antenna(il->hw_params.valid_tx_ant); |
be663ab6 | 2391 | lq_sta->lq.general_params.dual_stream_ant_msk = |
46bc8d4b SG |
2392 | il->hw_params.valid_tx_ant & |
2393 | ~il4965_first_antenna(il->hw_params.valid_tx_ant); | |
be663ab6 WYG |
2394 | if (!lq_sta->lq.general_params.dual_stream_ant_msk) { |
2395 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
46bc8d4b | 2396 | } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { |
be663ab6 | 2397 | lq_sta->lq.general_params.dual_stream_ant_msk = |
46bc8d4b | 2398 | il->hw_params.valid_tx_ant; |
be663ab6 WYG |
2399 | } |
2400 | ||
2401 | /* as default allow aggregation for all tids */ | |
e2ebc833 | 2402 | lq_sta->tx_agg_tid_en = IL_AGG_ALL_TID; |
46bc8d4b | 2403 | lq_sta->drv = il; |
be663ab6 WYG |
2404 | |
2405 | /* Set last_txrate_idx to lowest rate */ | |
2406 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2407 | if (sband->band == IEEE80211_BAND_5GHZ) | |
e2ebc833 | 2408 | lq_sta->last_txrate_idx += IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2409 | lq_sta->is_agg = 0; |
2410 | ||
2411 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2412 | lq_sta->dbg_fixed_rate = 0; | |
2413 | #endif | |
2414 | ||
46bc8d4b | 2415 | il4965_rs_initialize_lq(il, conf, sta, lq_sta); |
be663ab6 WYG |
2416 | } |
2417 | ||
46bc8d4b | 2418 | static void il4965_rs_fill_link_cmd(struct il_priv *il, |
e2ebc833 | 2419 | struct il_lq_sta *lq_sta, u32 new_rate) |
be663ab6 | 2420 | { |
e2ebc833 | 2421 | struct il_scale_tbl_info tbl_type; |
be663ab6 WYG |
2422 | int index = 0; |
2423 | int rate_idx; | |
2424 | int repeat_rate = 0; | |
2425 | u8 ant_toggle_cnt = 0; | |
2426 | u8 use_ht_possible = 1; | |
2427 | u8 valid_tx_ant = 0; | |
e2ebc833 | 2428 | struct il_link_quality_cmd *lq_cmd = &lq_sta->lq; |
be663ab6 WYG |
2429 | |
2430 | /* Override starting rate (index 0) if needed for debug purposes */ | |
e2ebc833 | 2431 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
be663ab6 WYG |
2432 | |
2433 | /* Interpret new_rate (rate_n_flags) */ | |
e2ebc833 | 2434 | il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
be663ab6 WYG |
2435 | &tbl_type, &rate_idx); |
2436 | ||
2437 | /* How many times should we repeat the initial rate? */ | |
2438 | if (is_legacy(tbl_type.lq_type)) { | |
2439 | ant_toggle_cnt = 1; | |
e2ebc833 | 2440 | repeat_rate = IL_NUMBER_TRY; |
be663ab6 | 2441 | } else { |
e2ebc833 | 2442 | repeat_rate = IL_HT_NUMBER_TRY; |
be663ab6 WYG |
2443 | } |
2444 | ||
2445 | lq_cmd->general_params.mimo_delimiter = | |
2446 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
2447 | ||
2448 | /* Fill 1st table entry (index 0) */ | |
2449 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); | |
2450 | ||
e2ebc833 | 2451 | if (il4965_num_of_ant(tbl_type.ant_type) == 1) { |
be663ab6 WYG |
2452 | lq_cmd->general_params.single_stream_ant_msk = |
2453 | tbl_type.ant_type; | |
e2ebc833 | 2454 | } else if (il4965_num_of_ant(tbl_type.ant_type) == 2) { |
be663ab6 WYG |
2455 | lq_cmd->general_params.dual_stream_ant_msk = |
2456 | tbl_type.ant_type; | |
2457 | } /* otherwise we don't modify the existing value */ | |
2458 | ||
2459 | index++; | |
2460 | repeat_rate--; | |
46bc8d4b SG |
2461 | if (il) |
2462 | valid_tx_ant = il->hw_params.valid_tx_ant; | |
be663ab6 WYG |
2463 | |
2464 | /* Fill rest of rate table */ | |
2465 | while (index < LINK_QUAL_MAX_RETRY_NUM) { | |
2466 | /* Repeat initial/next rate. | |
e2ebc833 SG |
2467 | * For legacy IL_NUMBER_TRY == 1, this loop will not execute. |
2468 | * For HT IL_HT_NUMBER_TRY == 3, this executes twice. */ | |
232913b5 | 2469 | while (repeat_rate > 0 && index < LINK_QUAL_MAX_RETRY_NUM) { |
be663ab6 WYG |
2470 | if (is_legacy(tbl_type.lq_type)) { |
2471 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) | |
2472 | ant_toggle_cnt++; | |
46bc8d4b | 2473 | else if (il && |
e2ebc833 | 2474 | il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
2475 | &new_rate, &tbl_type)) |
2476 | ant_toggle_cnt = 1; | |
2477 | } | |
2478 | ||
2479 | /* Override next rate if needed for debug purposes */ | |
e2ebc833 | 2480 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
be663ab6 WYG |
2481 | |
2482 | /* Fill next table entry */ | |
2483 | lq_cmd->rs_table[index].rate_n_flags = | |
2484 | cpu_to_le32(new_rate); | |
2485 | repeat_rate--; | |
2486 | index++; | |
2487 | } | |
2488 | ||
e2ebc833 | 2489 | il4965_rs_get_tbl_info_from_mcs(new_rate, |
be663ab6 WYG |
2490 | lq_sta->band, &tbl_type, |
2491 | &rate_idx); | |
2492 | ||
2493 | /* Indicate to uCode which entries might be MIMO. | |
2494 | * If initial rate was MIMO, this will finally end up | |
e2ebc833 | 2495 | * as (IL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ |
be663ab6 WYG |
2496 | if (is_mimo(tbl_type.lq_type)) |
2497 | lq_cmd->general_params.mimo_delimiter = index; | |
2498 | ||
2499 | /* Get next rate */ | |
e2ebc833 | 2500 | new_rate = il4965_rs_get_lower_rate(lq_sta, |
be663ab6 WYG |
2501 | &tbl_type, rate_idx, |
2502 | use_ht_possible); | |
2503 | ||
2504 | /* How many times should we repeat the next rate? */ | |
2505 | if (is_legacy(tbl_type.lq_type)) { | |
2506 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) | |
2507 | ant_toggle_cnt++; | |
46bc8d4b | 2508 | else if (il && |
e2ebc833 | 2509 | il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
2510 | &new_rate, &tbl_type)) |
2511 | ant_toggle_cnt = 1; | |
2512 | ||
e2ebc833 | 2513 | repeat_rate = IL_NUMBER_TRY; |
be663ab6 | 2514 | } else { |
e2ebc833 | 2515 | repeat_rate = IL_HT_NUMBER_TRY; |
be663ab6 WYG |
2516 | } |
2517 | ||
2518 | /* Don't allow HT rates after next pass. | |
e2ebc833 | 2519 | * il4965_rs_get_lower_rate() will change type to LQ_A or LQ_G. */ |
be663ab6 WYG |
2520 | use_ht_possible = 0; |
2521 | ||
2522 | /* Override next rate if needed for debug purposes */ | |
e2ebc833 | 2523 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
be663ab6 WYG |
2524 | |
2525 | /* Fill next table entry */ | |
2526 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); | |
2527 | ||
2528 | index++; | |
2529 | repeat_rate--; | |
2530 | } | |
2531 | ||
2532 | lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
2533 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; | |
2534 | ||
2535 | lq_cmd->agg_params.agg_time_limit = | |
2536 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
2537 | } | |
2538 | ||
2539 | static void | |
e2ebc833 | 2540 | *il4965_rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
be663ab6 WYG |
2541 | { |
2542 | return hw->priv; | |
2543 | } | |
2544 | /* rate scale requires free function to be implemented */ | |
46bc8d4b | 2545 | static void il4965_rs_free(void *il_rate) |
be663ab6 WYG |
2546 | { |
2547 | return; | |
2548 | } | |
2549 | ||
46bc8d4b SG |
2550 | static void il4965_rs_free_sta(void *il_r, struct ieee80211_sta *sta, |
2551 | void *il_sta) | |
be663ab6 | 2552 | { |
46bc8d4b | 2553 | struct il_priv *il __maybe_unused = il_r; |
be663ab6 | 2554 | |
58de00a4 SG |
2555 | D_RATE("enter\n"); |
2556 | D_RATE("leave\n"); | |
be663ab6 WYG |
2557 | } |
2558 | ||
2559 | ||
2560 | #ifdef CONFIG_MAC80211_DEBUGFS | |
e2ebc833 | 2561 | static int il4965_open_file_generic(struct inode *inode, struct file *file) |
be663ab6 WYG |
2562 | { |
2563 | file->private_data = inode->i_private; | |
2564 | return 0; | |
2565 | } | |
e2ebc833 | 2566 | static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, |
be663ab6 WYG |
2567 | u32 *rate_n_flags, int index) |
2568 | { | |
46bc8d4b | 2569 | struct il_priv *il; |
be663ab6 WYG |
2570 | u8 valid_tx_ant; |
2571 | u8 ant_sel_tx; | |
2572 | ||
46bc8d4b SG |
2573 | il = lq_sta->drv; |
2574 | valid_tx_ant = il->hw_params.valid_tx_ant; | |
be663ab6 WYG |
2575 | if (lq_sta->dbg_fixed_rate) { |
2576 | ant_sel_tx = | |
2577 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
2578 | >> RATE_MCS_ANT_POS); | |
2579 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
2580 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
58de00a4 | 2581 | D_RATE("Fixed rate ON\n"); |
be663ab6 WYG |
2582 | } else { |
2583 | lq_sta->dbg_fixed_rate = 0; | |
9406f797 | 2584 | IL_ERR( |
be663ab6 WYG |
2585 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", |
2586 | ant_sel_tx, valid_tx_ant); | |
58de00a4 | 2587 | D_RATE("Fixed rate OFF\n"); |
be663ab6 WYG |
2588 | } |
2589 | } else { | |
58de00a4 | 2590 | D_RATE("Fixed rate OFF\n"); |
be663ab6 WYG |
2591 | } |
2592 | } | |
2593 | ||
e2ebc833 | 2594 | static ssize_t il4965_rs_sta_dbgfs_scale_table_write(struct file *file, |
be663ab6 WYG |
2595 | const char __user *user_buf, size_t count, loff_t *ppos) |
2596 | { | |
e2ebc833 | 2597 | struct il_lq_sta *lq_sta = file->private_data; |
46bc8d4b | 2598 | struct il_priv *il; |
be663ab6 | 2599 | char buf[64]; |
8220ba3e | 2600 | size_t buf_size; |
be663ab6 | 2601 | u32 parsed_rate; |
e2ebc833 SG |
2602 | struct il_station_priv *sta_priv = |
2603 | container_of(lq_sta, struct il_station_priv, lq_sta); | |
2604 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 | 2605 | |
46bc8d4b | 2606 | il = lq_sta->drv; |
be663ab6 WYG |
2607 | memset(buf, 0, sizeof(buf)); |
2608 | buf_size = min(count, sizeof(buf) - 1); | |
2609 | if (copy_from_user(buf, user_buf, buf_size)) | |
2610 | return -EFAULT; | |
2611 | ||
2612 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
2613 | lq_sta->dbg_fixed_rate = parsed_rate; | |
2614 | else | |
2615 | lq_sta->dbg_fixed_rate = 0; | |
2616 | ||
2617 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
2618 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2619 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2620 | ||
58de00a4 | 2621 | D_RATE("sta_id %d rate 0x%X\n", |
be663ab6 WYG |
2622 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
2623 | ||
2624 | if (lq_sta->dbg_fixed_rate) { | |
e2ebc833 SG |
2625 | il4965_rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
2626 | il_send_lq_cmd(lq_sta->drv, ctx, &lq_sta->lq, CMD_ASYNC, | |
be663ab6 WYG |
2627 | false); |
2628 | } | |
2629 | ||
2630 | return count; | |
2631 | } | |
2632 | ||
e2ebc833 | 2633 | static ssize_t il4965_rs_sta_dbgfs_scale_table_read(struct file *file, |
be663ab6 WYG |
2634 | char __user *user_buf, size_t count, loff_t *ppos) |
2635 | { | |
2636 | char *buff; | |
2637 | int desc = 0; | |
2638 | int i = 0; | |
2639 | int index = 0; | |
2640 | ssize_t ret; | |
2641 | ||
e2ebc833 | 2642 | struct il_lq_sta *lq_sta = file->private_data; |
46bc8d4b | 2643 | struct il_priv *il; |
e2ebc833 | 2644 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
be663ab6 | 2645 | |
46bc8d4b | 2646 | il = lq_sta->drv; |
be663ab6 WYG |
2647 | buff = kmalloc(1024, GFP_KERNEL); |
2648 | if (!buff) | |
2649 | return -ENOMEM; | |
2650 | ||
2651 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); | |
2652 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", | |
2653 | lq_sta->total_failed, lq_sta->total_success, | |
2654 | lq_sta->active_legacy_rate); | |
2655 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", | |
2656 | lq_sta->dbg_fixed_rate); | |
2657 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", | |
46bc8d4b SG |
2658 | (il->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", |
2659 | (il->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2660 | (il->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
be663ab6 WYG |
2661 | desc += sprintf(buff+desc, "lq type %s\n", |
2662 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
2663 | if (is_Ht(tbl->lq_type)) { | |
2664 | desc += sprintf(buff+desc, " %s", | |
2665 | (is_siso(tbl->lq_type)) ? "SISO" : "MIMO2"); | |
2666 | desc += sprintf(buff+desc, " %s", | |
2667 | (tbl->is_ht40) ? "40MHz" : "20MHz"); | |
2668 | desc += sprintf(buff+desc, " %s %s %s\n", | |
2669 | (tbl->is_SGI) ? "SGI" : "", | |
2670 | (lq_sta->is_green) ? "GF enabled" : "", | |
2671 | (lq_sta->is_agg) ? "AGG on" : ""); | |
2672 | } | |
2673 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", | |
2674 | lq_sta->last_rate_n_flags); | |
2675 | desc += sprintf(buff+desc, "general:" | |
2676 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
2677 | lq_sta->lq.general_params.flags, | |
2678 | lq_sta->lq.general_params.mimo_delimiter, | |
2679 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2680 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
2681 | ||
2682 | desc += sprintf(buff+desc, "agg:" | |
2683 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2684 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), | |
2685 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2686 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
2687 | ||
2688 | desc += sprintf(buff+desc, | |
2689 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2690 | lq_sta->lq.general_params.start_rate_index[0], | |
2691 | lq_sta->lq.general_params.start_rate_index[1], | |
2692 | lq_sta->lq.general_params.start_rate_index[2], | |
2693 | lq_sta->lq.general_params.start_rate_index[3]); | |
2694 | ||
2695 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
e2ebc833 | 2696 | index = il4965_hwrate_to_plcp_idx( |
be663ab6 WYG |
2697 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
2698 | if (is_legacy(tbl->lq_type)) { | |
2699 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
2700 | i, | |
2701 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
e2ebc833 | 2702 | il_rate_mcs[index].mbps); |
be663ab6 WYG |
2703 | } else { |
2704 | desc += sprintf(buff+desc, | |
2705 | " rate[%d] 0x%X %smbps (%s)\n", | |
2706 | i, | |
2707 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
e2ebc833 | 2708 | il_rate_mcs[index].mbps, il_rate_mcs[index].mcs); |
be663ab6 WYG |
2709 | } |
2710 | } | |
2711 | ||
2712 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2713 | kfree(buff); | |
2714 | return ret; | |
2715 | } | |
2716 | ||
2717 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
e2ebc833 SG |
2718 | .write = il4965_rs_sta_dbgfs_scale_table_write, |
2719 | .read = il4965_rs_sta_dbgfs_scale_table_read, | |
2720 | .open = il4965_open_file_generic, | |
be663ab6 WYG |
2721 | .llseek = default_llseek, |
2722 | }; | |
e2ebc833 | 2723 | static ssize_t il4965_rs_sta_dbgfs_stats_table_read(struct file *file, |
be663ab6 WYG |
2724 | char __user *user_buf, size_t count, loff_t *ppos) |
2725 | { | |
2726 | char *buff; | |
2727 | int desc = 0; | |
2728 | int i, j; | |
2729 | ssize_t ret; | |
2730 | ||
e2ebc833 | 2731 | struct il_lq_sta *lq_sta = file->private_data; |
be663ab6 WYG |
2732 | |
2733 | buff = kmalloc(1024, GFP_KERNEL); | |
2734 | if (!buff) | |
2735 | return -ENOMEM; | |
2736 | ||
2737 | for (i = 0; i < LQ_SIZE; i++) { | |
2738 | desc += sprintf(buff+desc, | |
2739 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
2740 | "rate=0x%X\n", | |
2741 | lq_sta->active_tbl == i ? "*" : "x", | |
2742 | lq_sta->lq_info[i].lq_type, | |
2743 | lq_sta->lq_info[i].is_SGI, | |
2744 | lq_sta->lq_info[i].is_ht40, | |
2745 | lq_sta->lq_info[i].is_dup, | |
2746 | lq_sta->is_green, | |
2747 | lq_sta->lq_info[i].current_rate); | |
e2ebc833 | 2748 | for (j = 0; j < IL_RATE_COUNT; j++) { |
be663ab6 WYG |
2749 | desc += sprintf(buff+desc, |
2750 | "counter=%d success=%d %%=%d\n", | |
2751 | lq_sta->lq_info[i].win[j].counter, | |
2752 | lq_sta->lq_info[i].win[j].success_counter, | |
2753 | lq_sta->lq_info[i].win[j].success_ratio); | |
2754 | } | |
2755 | } | |
2756 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2757 | kfree(buff); | |
2758 | return ret; | |
2759 | } | |
2760 | ||
2761 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
e2ebc833 SG |
2762 | .read = il4965_rs_sta_dbgfs_stats_table_read, |
2763 | .open = il4965_open_file_generic, | |
be663ab6 WYG |
2764 | .llseek = default_llseek, |
2765 | }; | |
2766 | ||
e2ebc833 | 2767 | static ssize_t il4965_rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
be663ab6 WYG |
2768 | char __user *user_buf, size_t count, loff_t *ppos) |
2769 | { | |
2770 | char buff[120]; | |
2771 | int desc = 0; | |
2772 | ssize_t ret; | |
2773 | ||
e2ebc833 | 2774 | struct il_lq_sta *lq_sta = file->private_data; |
46bc8d4b | 2775 | struct il_priv *il; |
e2ebc833 | 2776 | struct il_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; |
be663ab6 | 2777 | |
46bc8d4b | 2778 | il = lq_sta->drv; |
be663ab6 WYG |
2779 | |
2780 | if (is_Ht(tbl->lq_type)) | |
2781 | desc += sprintf(buff+desc, | |
2782 | "Bit Rate= %d Mb/s\n", | |
2783 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
2784 | else | |
2785 | desc += sprintf(buff+desc, | |
2786 | "Bit Rate= %d Mb/s\n", | |
d2ddf621 | 2787 | il_rates[lq_sta->last_txrate_idx].ieee >> 1); |
be663ab6 WYG |
2788 | |
2789 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2790 | return ret; | |
2791 | } | |
2792 | ||
2793 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
e2ebc833 SG |
2794 | .read = il4965_rs_sta_dbgfs_rate_scale_data_read, |
2795 | .open = il4965_open_file_generic, | |
be663ab6 WYG |
2796 | .llseek = default_llseek, |
2797 | }; | |
2798 | ||
46bc8d4b | 2799 | static void il4965_rs_add_debugfs(void *il, void *il_sta, |
be663ab6 WYG |
2800 | struct dentry *dir) |
2801 | { | |
46bc8d4b | 2802 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 WYG |
2803 | lq_sta->rs_sta_dbgfs_scale_table_file = |
2804 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, | |
2805 | lq_sta, &rs_sta_dbgfs_scale_table_ops); | |
2806 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
2807 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, | |
2808 | lq_sta, &rs_sta_dbgfs_stats_table_ops); | |
2809 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = | |
2810 | debugfs_create_file("rate_scale_data", S_IRUSR, dir, | |
2811 | lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); | |
2812 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = | |
2813 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, | |
2814 | &lq_sta->tx_agg_tid_en); | |
2815 | ||
2816 | } | |
2817 | ||
46bc8d4b | 2818 | static void il4965_rs_remove_debugfs(void *il, void *il_sta) |
be663ab6 | 2819 | { |
46bc8d4b | 2820 | struct il_lq_sta *lq_sta = il_sta; |
be663ab6 WYG |
2821 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2822 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
2823 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); | |
2824 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); | |
2825 | } | |
2826 | #endif | |
2827 | ||
2828 | /* | |
2829 | * Initialization of rate scaling information is done by driver after | |
2830 | * the station is added. Since mac80211 calls this function before a | |
2831 | * station is added we ignore it. | |
2832 | */ | |
2833 | static void | |
46bc8d4b SG |
2834 | il4965_rs_rate_init_stub(void *il_r, struct ieee80211_supported_band *sband, |
2835 | struct ieee80211_sta *sta, void *il_sta) | |
be663ab6 WYG |
2836 | { |
2837 | } | |
2838 | static struct rate_control_ops rs_4965_ops = { | |
2839 | .module = NULL, | |
d3175167 | 2840 | .name = IL4965_RS_NAME, |
e2ebc833 SG |
2841 | .tx_status = il4965_rs_tx_status, |
2842 | .get_rate = il4965_rs_get_rate, | |
2843 | .rate_init = il4965_rs_rate_init_stub, | |
2844 | .alloc = il4965_rs_alloc, | |
2845 | .free = il4965_rs_free, | |
2846 | .alloc_sta = il4965_rs_alloc_sta, | |
2847 | .free_sta = il4965_rs_free_sta, | |
be663ab6 | 2848 | #ifdef CONFIG_MAC80211_DEBUGFS |
e2ebc833 SG |
2849 | .add_sta_debugfs = il4965_rs_add_debugfs, |
2850 | .remove_sta_debugfs = il4965_rs_remove_debugfs, | |
be663ab6 WYG |
2851 | #endif |
2852 | }; | |
2853 | ||
e2ebc833 | 2854 | int il4965_rate_control_register(void) |
be663ab6 | 2855 | { |
be663ab6 WYG |
2856 | return ieee80211_rate_control_register(&rs_4965_ops); |
2857 | } | |
2858 | ||
e2ebc833 | 2859 | void il4965_rate_control_unregister(void) |
be663ab6 WYG |
2860 | { |
2861 | ieee80211_rate_control_unregister(&rs_4965_ops); | |
2862 | } |