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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 | ||
43 | #define IWL4965_RS_NAME "iwl-4965-rs" | |
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 | |
e2ebc833 SG |
49 | #define IL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
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 | */ | |
e2ebc833 SG |
99 | const struct il_rate_info iwlegacy_rates[IL_RATE_COUNT] = { |
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; |
e2ebc833 | 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 { | |
ef33417d JL |
135 | for (idx = 0; idx < ARRAY_SIZE(iwlegacy_rates); idx++) |
136 | if (iwlegacy_rates[idx].plcp == (rate_n_flags & 0xFF)) | |
be663ab6 WYG |
137 | return idx; |
138 | } | |
139 | ||
140 | return -1; | |
141 | } | |
142 | ||
e2ebc833 | 143 | static void il4965_rs_rate_scale_perform(struct il_priv *priv, |
be663ab6 WYG |
144 | struct sk_buff *skb, |
145 | struct ieee80211_sta *sta, | |
e2ebc833 SG |
146 | struct il_lq_sta *lq_sta); |
147 | static void il4965_rs_fill_link_cmd(struct il_priv *priv, | |
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 | |
e2ebc833 | 229 | il4965_rs_rate_scale_clear_window(struct il_rate_scale_data *window) |
be663ab6 WYG |
230 | { |
231 | window->data = 0; | |
232 | window->success_counter = 0; | |
e2ebc833 | 233 | window->success_ratio = IL_INVALID_VALUE; |
be663ab6 | 234 | window->counter = 0; |
e2ebc833 | 235 | window->average_tpt = IL_INVALID_VALUE; |
be663ab6 WYG |
236 | window->stamp = 0; |
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 | /* | |
245 | * removes the old data from the statistics. All data that is older than | |
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 | ||
254 | while (tl->queue_count && | |
255 | (tl->time_stamp < oldest_time)) { | |
256 | tl->total -= tl->packet_count[tl->head]; | |
257 | tl->packet_count[tl->head] = 0; | |
258 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
259 | tl->queue_count--; | |
260 | tl->head++; | |
261 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
262 | tl->head = 0; | |
263 | } | |
264 | } | |
265 | ||
266 | /* | |
267 | * increment traffic load value for tid and also remove | |
268 | * any old values if passed the certain time period | |
269 | */ | |
e2ebc833 | 270 | static u8 il4965_rs_tl_add_packet(struct il_lq_sta *lq_data, |
be663ab6 WYG |
271 | struct ieee80211_hdr *hdr) |
272 | { | |
273 | u32 curr_time = jiffies_to_msecs(jiffies); | |
274 | u32 time_diff; | |
275 | s32 index; | |
e2ebc833 | 276 | struct il_traffic_load *tl = NULL; |
be663ab6 WYG |
277 | u8 tid; |
278 | ||
279 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
280 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
281 | tid = qc[0] & 0xf; | |
282 | } else | |
283 | return MAX_TID_COUNT; | |
284 | ||
285 | if (unlikely(tid >= TID_MAX_LOAD_COUNT)) | |
286 | return MAX_TID_COUNT; | |
287 | ||
288 | tl = &lq_data->load[tid]; | |
289 | ||
290 | curr_time -= curr_time % TID_ROUND_VALUE; | |
291 | ||
292 | /* Happens only for the first packet. Initialize the data */ | |
293 | if (!(tl->queue_count)) { | |
294 | tl->total = 1; | |
295 | tl->time_stamp = curr_time; | |
296 | tl->queue_count = 1; | |
297 | tl->head = 0; | |
298 | tl->packet_count[0] = 1; | |
299 | return MAX_TID_COUNT; | |
300 | } | |
301 | ||
302 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
303 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
304 | ||
305 | /* The history is too long: remove data that is older than */ | |
306 | /* TID_MAX_TIME_DIFF */ | |
307 | if (index >= TID_QUEUE_MAX_SIZE) | |
e2ebc833 | 308 | il4965_rs_tl_rm_old_stats(tl, curr_time); |
be663ab6 WYG |
309 | |
310 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
311 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
312 | tl->total = tl->total + 1; | |
313 | ||
314 | if ((index + 1) > tl->queue_count) | |
315 | tl->queue_count = index + 1; | |
316 | ||
317 | return tid; | |
318 | } | |
319 | ||
320 | /* | |
321 | get the traffic load value for tid | |
322 | */ | |
e2ebc833 | 323 | static u32 il4965_rs_tl_get_load(struct il_lq_sta *lq_data, u8 tid) |
be663ab6 WYG |
324 | { |
325 | u32 curr_time = jiffies_to_msecs(jiffies); | |
326 | u32 time_diff; | |
327 | s32 index; | |
e2ebc833 | 328 | struct il_traffic_load *tl = NULL; |
be663ab6 WYG |
329 | |
330 | if (tid >= TID_MAX_LOAD_COUNT) | |
331 | return 0; | |
332 | ||
333 | tl = &(lq_data->load[tid]); | |
334 | ||
335 | curr_time -= curr_time % TID_ROUND_VALUE; | |
336 | ||
337 | if (!(tl->queue_count)) | |
338 | return 0; | |
339 | ||
340 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
341 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
342 | ||
343 | /* The history is too long: remove data that is older than */ | |
344 | /* TID_MAX_TIME_DIFF */ | |
345 | if (index >= TID_QUEUE_MAX_SIZE) | |
e2ebc833 | 346 | il4965_rs_tl_rm_old_stats(tl, curr_time); |
be663ab6 WYG |
347 | |
348 | return tl->total; | |
349 | } | |
350 | ||
e2ebc833 SG |
351 | static int il4965_rs_tl_turn_on_agg_for_tid(struct il_priv *priv, |
352 | struct il_lq_sta *lq_data, u8 tid, | |
be663ab6 WYG |
353 | struct ieee80211_sta *sta) |
354 | { | |
355 | int ret = -EAGAIN; | |
356 | u32 load; | |
357 | ||
e2ebc833 | 358 | load = il4965_rs_tl_get_load(lq_data, tid); |
be663ab6 | 359 | |
e2ebc833 SG |
360 | if (load > IL_AGG_LOAD_THRESHOLD) { |
361 | IL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", | |
be663ab6 WYG |
362 | sta->addr, tid); |
363 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); | |
364 | if (ret == -EAGAIN) { | |
365 | /* | |
366 | * driver and mac80211 is out of sync | |
367 | * this might be cause by reloading firmware | |
368 | * stop the tx ba session here | |
369 | */ | |
e2ebc833 | 370 | IL_ERR(priv, "Fail start Tx agg on tid: %d\n", |
be663ab6 WYG |
371 | tid); |
372 | ieee80211_stop_tx_ba_session(sta, tid); | |
373 | } | |
374 | } else { | |
e2ebc833 | 375 | IL_ERR(priv, "Aggregation not enabled for tid %d " |
be663ab6 WYG |
376 | "because load = %u\n", tid, load); |
377 | } | |
378 | return ret; | |
379 | } | |
380 | ||
e2ebc833 SG |
381 | static void il4965_rs_tl_turn_on_agg(struct il_priv *priv, u8 tid, |
382 | struct il_lq_sta *lq_data, | |
be663ab6 WYG |
383 | struct ieee80211_sta *sta) |
384 | { | |
385 | if (tid < TID_MAX_LOAD_COUNT) | |
e2ebc833 | 386 | il4965_rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); |
be663ab6 | 387 | else |
e2ebc833 | 388 | IL_ERR(priv, "tid exceeds max load count: %d/%d\n", |
be663ab6 WYG |
389 | tid, TID_MAX_LOAD_COUNT); |
390 | } | |
391 | ||
e2ebc833 | 392 | static inline int il4965_get_il4965_num_of_ant_from_rate(u32 rate_n_flags) |
be663ab6 WYG |
393 | { |
394 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
395 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
396 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
397 | } | |
398 | ||
399 | /* | |
e2ebc833 | 400 | * Static function to get the expected throughput from an il_scale_tbl_info |
be663ab6 WYG |
401 | * that wraps a NULL pointer check |
402 | */ | |
403 | static s32 | |
e2ebc833 | 404 | il4965_get_expected_tpt(struct il_scale_tbl_info *tbl, int rs_index) |
be663ab6 WYG |
405 | { |
406 | if (tbl->expected_tpt) | |
407 | return tbl->expected_tpt[rs_index]; | |
408 | return 0; | |
409 | } | |
410 | ||
411 | /** | |
e2ebc833 | 412 | * il4965_rs_collect_tx_data - Update the success/failure sliding window |
be663ab6 WYG |
413 | * |
414 | * We keep a sliding window of the last 62 packets transmitted | |
415 | * at this rate. window->data contains the bitmask of successful | |
416 | * packets. | |
417 | */ | |
e2ebc833 | 418 | static int il4965_rs_collect_tx_data(struct il_scale_tbl_info *tbl, |
be663ab6 WYG |
419 | int scale_index, int attempts, int successes) |
420 | { | |
e2ebc833 SG |
421 | struct il_rate_scale_data *window = NULL; |
422 | static const u64 mask = (((u64)1) << (IL_RATE_MAX_WINDOW - 1)); | |
be663ab6 WYG |
423 | s32 fail_count, tpt; |
424 | ||
e2ebc833 | 425 | if (scale_index < 0 || scale_index >= IL_RATE_COUNT) |
be663ab6 WYG |
426 | return -EINVAL; |
427 | ||
428 | /* Select window for current tx bit rate */ | |
429 | window = &(tbl->win[scale_index]); | |
430 | ||
431 | /* Get expected throughput */ | |
e2ebc833 | 432 | tpt = il4965_get_expected_tpt(tbl, scale_index); |
be663ab6 WYG |
433 | |
434 | /* | |
435 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
436 | * history window; anything older isn't really relevant any more. | |
437 | * If we have filled up the sliding window, drop the oldest attempt; | |
438 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
439 | * subtract "1" from the success counter (this is the main reason | |
440 | * we keep these bitmaps!). | |
441 | */ | |
442 | while (attempts > 0) { | |
e2ebc833 | 443 | if (window->counter >= IL_RATE_MAX_WINDOW) { |
be663ab6 WYG |
444 | |
445 | /* remove earliest */ | |
e2ebc833 | 446 | window->counter = IL_RATE_MAX_WINDOW - 1; |
be663ab6 WYG |
447 | |
448 | if (window->data & mask) { | |
449 | window->data &= ~mask; | |
450 | window->success_counter--; | |
451 | } | |
452 | } | |
453 | ||
454 | /* Increment frames-attempted counter */ | |
455 | window->counter++; | |
456 | ||
457 | /* Shift bitmap by one frame to throw away oldest history */ | |
458 | window->data <<= 1; | |
459 | ||
460 | /* Mark the most recent #successes attempts as successful */ | |
461 | if (successes > 0) { | |
462 | window->success_counter++; | |
463 | window->data |= 0x1; | |
464 | successes--; | |
465 | } | |
466 | ||
467 | attempts--; | |
468 | } | |
469 | ||
470 | /* Calculate current success ratio, avoid divide-by-0! */ | |
471 | if (window->counter > 0) | |
472 | window->success_ratio = 128 * (100 * window->success_counter) | |
473 | / window->counter; | |
474 | else | |
e2ebc833 | 475 | window->success_ratio = IL_INVALID_VALUE; |
be663ab6 WYG |
476 | |
477 | fail_count = window->counter - window->success_counter; | |
478 | ||
479 | /* Calculate average throughput, if we have enough history. */ | |
e2ebc833 SG |
480 | if ((fail_count >= IL_RATE_MIN_FAILURE_TH) || |
481 | (window->success_counter >= IL_RATE_MIN_SUCCESS_TH)) | |
be663ab6 WYG |
482 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; |
483 | else | |
e2ebc833 | 484 | window->average_tpt = IL_INVALID_VALUE; |
be663ab6 WYG |
485 | |
486 | /* Tag this window as having been updated */ | |
487 | window->stamp = jiffies; | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | /* | |
493 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
494 | */ | |
e2ebc833 SG |
495 | static u32 il4965_rate_n_flags_from_tbl(struct il_priv *priv, |
496 | struct il_scale_tbl_info *tbl, | |
be663ab6 WYG |
497 | int index, u8 use_green) |
498 | { | |
499 | u32 rate_n_flags = 0; | |
500 | ||
501 | if (is_legacy(tbl->lq_type)) { | |
ef33417d | 502 | rate_n_flags = iwlegacy_rates[index].plcp; |
e2ebc833 | 503 | if (index >= IL_FIRST_CCK_RATE && index <= IL_LAST_CCK_RATE) |
be663ab6 WYG |
504 | rate_n_flags |= RATE_MCS_CCK_MSK; |
505 | ||
506 | } else if (is_Ht(tbl->lq_type)) { | |
e2ebc833 SG |
507 | if (index > IL_LAST_OFDM_RATE) { |
508 | IL_ERR(priv, "Invalid HT rate index %d\n", index); | |
509 | index = IL_LAST_OFDM_RATE; | |
be663ab6 WYG |
510 | } |
511 | rate_n_flags = RATE_MCS_HT_MSK; | |
512 | ||
513 | if (is_siso(tbl->lq_type)) | |
ef33417d | 514 | rate_n_flags |= iwlegacy_rates[index].plcp_siso; |
be663ab6 | 515 | else |
ef33417d | 516 | rate_n_flags |= iwlegacy_rates[index].plcp_mimo2; |
be663ab6 | 517 | } else { |
e2ebc833 | 518 | IL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
be663ab6 WYG |
519 | } |
520 | ||
521 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & | |
522 | RATE_MCS_ANT_ABC_MSK); | |
523 | ||
524 | if (is_Ht(tbl->lq_type)) { | |
525 | if (tbl->is_ht40) { | |
526 | if (tbl->is_dup) | |
527 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
528 | else | |
529 | rate_n_flags |= RATE_MCS_HT40_MSK; | |
530 | } | |
531 | if (tbl->is_SGI) | |
532 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
533 | ||
534 | if (use_green) { | |
535 | rate_n_flags |= RATE_MCS_GF_MSK; | |
536 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
537 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
e2ebc833 | 538 | IL_ERR(priv, "GF was set with SGI:SISO\n"); |
be663ab6 WYG |
539 | } |
540 | } | |
541 | } | |
542 | return rate_n_flags; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Interpret uCode API's rate_n_flags format, | |
547 | * fill "search" or "active" tx mode table. | |
548 | */ | |
e2ebc833 | 549 | static int il4965_rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
be663ab6 | 550 | enum ieee80211_band band, |
e2ebc833 | 551 | struct il_scale_tbl_info *tbl, |
be663ab6 WYG |
552 | int *rate_idx) |
553 | { | |
554 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); | |
e2ebc833 | 555 | u8 il4965_num_of_ant = il4965_get_il4965_num_of_ant_from_rate(rate_n_flags); |
be663ab6 WYG |
556 | u8 mcs; |
557 | ||
e2ebc833 SG |
558 | memset(tbl, 0, sizeof(struct il_scale_tbl_info)); |
559 | *rate_idx = il4965_hwrate_to_plcp_idx(rate_n_flags); | |
be663ab6 | 560 | |
e2ebc833 | 561 | if (*rate_idx == IL_RATE_INVALID) { |
be663ab6 WYG |
562 | *rate_idx = -1; |
563 | return -EINVAL; | |
564 | } | |
565 | tbl->is_SGI = 0; /* default legacy setup */ | |
566 | tbl->is_ht40 = 0; | |
567 | tbl->is_dup = 0; | |
568 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); | |
569 | tbl->lq_type = LQ_NONE; | |
e2ebc833 | 570 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
571 | |
572 | /* legacy rate format */ | |
573 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { | |
e2ebc833 | 574 | if (il4965_num_of_ant == 1) { |
be663ab6 WYG |
575 | if (band == IEEE80211_BAND_5GHZ) |
576 | tbl->lq_type = LQ_A; | |
577 | else | |
578 | tbl->lq_type = LQ_G; | |
579 | } | |
580 | /* HT rate format */ | |
581 | } else { | |
582 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
583 | tbl->is_SGI = 1; | |
584 | ||
585 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || | |
586 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
587 | tbl->is_ht40 = 1; | |
588 | ||
589 | if (rate_n_flags & RATE_MCS_DUP_MSK) | |
590 | tbl->is_dup = 1; | |
591 | ||
e2ebc833 | 592 | mcs = il4965_rs_extract_rate(rate_n_flags); |
be663ab6 WYG |
593 | |
594 | /* SISO */ | |
e2ebc833 SG |
595 | if (mcs <= IL_RATE_SISO_60M_PLCP) { |
596 | if (il4965_num_of_ant == 1) | |
be663ab6 WYG |
597 | tbl->lq_type = LQ_SISO; /*else NONE*/ |
598 | /* MIMO2 */ | |
599 | } else { | |
e2ebc833 | 600 | if (il4965_num_of_ant == 2) |
be663ab6 WYG |
601 | tbl->lq_type = LQ_MIMO2; |
602 | } | |
603 | } | |
604 | return 0; | |
605 | } | |
606 | ||
607 | /* switch to another antenna/antennas and return 1 */ | |
608 | /* if no other valid antenna found, return 0 */ | |
e2ebc833 SG |
609 | static int il4965_rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, |
610 | struct il_scale_tbl_info *tbl) | |
be663ab6 WYG |
611 | { |
612 | u8 new_ant_type; | |
613 | ||
614 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
615 | return 0; | |
616 | ||
e2ebc833 | 617 | if (!il4965_rs_is_valid_ant(valid_ant, tbl->ant_type)) |
be663ab6 WYG |
618 | return 0; |
619 | ||
620 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
621 | ||
622 | while ((new_ant_type != tbl->ant_type) && | |
e2ebc833 | 623 | !il4965_rs_is_valid_ant(valid_ant, new_ant_type)) |
be663ab6 WYG |
624 | new_ant_type = ant_toggle_lookup[new_ant_type]; |
625 | ||
626 | if (new_ant_type == tbl->ant_type) | |
627 | return 0; | |
628 | ||
629 | tbl->ant_type = new_ant_type; | |
630 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
631 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
632 | return 1; | |
633 | } | |
634 | ||
635 | /** | |
636 | * Green-field mode is valid if the station supports it and | |
637 | * there are no non-GF stations present in the BSS. | |
638 | */ | |
e2ebc833 | 639 | static bool il4965_rs_use_green(struct ieee80211_sta *sta) |
be663ab6 | 640 | { |
e2ebc833 SG |
641 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; |
642 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 WYG |
643 | |
644 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && | |
645 | !(ctx->ht.non_gf_sta_present); | |
646 | } | |
647 | ||
648 | /** | |
e2ebc833 | 649 | * il4965_rs_get_supported_rates - get the available rates |
be663ab6 WYG |
650 | * |
651 | * if management frame or broadcast frame only return | |
652 | * basic available rates. | |
653 | * | |
654 | */ | |
e2ebc833 | 655 | static u16 il4965_rs_get_supported_rates(struct il_lq_sta *lq_sta, |
be663ab6 | 656 | struct ieee80211_hdr *hdr, |
e2ebc833 | 657 | enum il_table_type rate_type) |
be663ab6 WYG |
658 | { |
659 | if (is_legacy(rate_type)) { | |
660 | return lq_sta->active_legacy_rate; | |
661 | } else { | |
662 | if (is_siso(rate_type)) | |
663 | return lq_sta->active_siso_rate; | |
664 | else | |
665 | return lq_sta->active_mimo2_rate; | |
666 | } | |
667 | } | |
668 | ||
669 | static u16 | |
e2ebc833 | 670 | il4965_rs_get_adjacent_rate(struct il_priv *priv, u8 index, u16 rate_mask, |
be663ab6 WYG |
671 | int rate_type) |
672 | { | |
e2ebc833 SG |
673 | u8 high = IL_RATE_INVALID; |
674 | u8 low = IL_RATE_INVALID; | |
be663ab6 WYG |
675 | |
676 | /* 802.11A or ht walks to the next literal adjacent rate in | |
677 | * the rate table */ | |
678 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
679 | int i; | |
680 | u32 mask; | |
681 | ||
682 | /* Find the previous rate that is in the rate mask */ | |
683 | i = index - 1; | |
684 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
685 | if (rate_mask & mask) { | |
686 | low = i; | |
687 | break; | |
688 | } | |
689 | } | |
690 | ||
691 | /* Find the next rate that is in the rate mask */ | |
692 | i = index + 1; | |
e2ebc833 | 693 | for (mask = (1 << i); i < IL_RATE_COUNT; i++, mask <<= 1) { |
be663ab6 WYG |
694 | if (rate_mask & mask) { |
695 | high = i; | |
696 | break; | |
697 | } | |
698 | } | |
699 | ||
700 | return (high << 8) | low; | |
701 | } | |
702 | ||
703 | low = index; | |
e2ebc833 | 704 | while (low != IL_RATE_INVALID) { |
ef33417d | 705 | low = iwlegacy_rates[low].prev_rs; |
e2ebc833 | 706 | if (low == IL_RATE_INVALID) |
be663ab6 WYG |
707 | break; |
708 | if (rate_mask & (1 << low)) | |
709 | break; | |
e2ebc833 | 710 | IL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
be663ab6 WYG |
711 | } |
712 | ||
713 | high = index; | |
e2ebc833 | 714 | while (high != IL_RATE_INVALID) { |
ef33417d | 715 | high = iwlegacy_rates[high].next_rs; |
e2ebc833 | 716 | if (high == IL_RATE_INVALID) |
be663ab6 WYG |
717 | break; |
718 | if (rate_mask & (1 << high)) | |
719 | break; | |
e2ebc833 | 720 | IL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
be663ab6 WYG |
721 | } |
722 | ||
723 | return (high << 8) | low; | |
724 | } | |
725 | ||
e2ebc833 SG |
726 | static u32 il4965_rs_get_lower_rate(struct il_lq_sta *lq_sta, |
727 | struct il_scale_tbl_info *tbl, | |
be663ab6 WYG |
728 | u8 scale_index, u8 ht_possible) |
729 | { | |
730 | s32 low; | |
731 | u16 rate_mask; | |
732 | u16 high_low; | |
733 | u8 switch_to_legacy = 0; | |
734 | u8 is_green = lq_sta->is_green; | |
e2ebc833 | 735 | struct il_priv *priv = lq_sta->drv; |
be663ab6 WYG |
736 | |
737 | /* check if we need to switch from HT to legacy rates. | |
738 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
739 | * are always supported (spec demand) */ | |
740 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
741 | switch_to_legacy = 1; | |
742 | scale_index = rs_ht_to_legacy[scale_index]; | |
743 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
744 | tbl->lq_type = LQ_A; | |
745 | else | |
746 | tbl->lq_type = LQ_G; | |
747 | ||
e2ebc833 | 748 | if (il4965_num_of_ant(tbl->ant_type) > 1) |
be663ab6 | 749 | tbl->ant_type = |
e2ebc833 | 750 | il4965_first_antenna(priv->hw_params.valid_tx_ant); |
be663ab6 WYG |
751 | |
752 | tbl->is_ht40 = 0; | |
753 | tbl->is_SGI = 0; | |
e2ebc833 | 754 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
755 | } |
756 | ||
e2ebc833 | 757 | rate_mask = il4965_rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
be663ab6 WYG |
758 | |
759 | /* Mask with station rate restriction */ | |
760 | if (is_legacy(tbl->lq_type)) { | |
761 | /* supp_rates has no CCK bits in A mode */ | |
762 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
763 | rate_mask = (u16)(rate_mask & | |
e2ebc833 | 764 | (lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); |
be663ab6 WYG |
765 | else |
766 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); | |
767 | } | |
768 | ||
769 | /* If we switched from HT to legacy, check current rate */ | |
770 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { | |
771 | low = scale_index; | |
772 | goto out; | |
773 | } | |
774 | ||
e2ebc833 | 775 | high_low = il4965_rs_get_adjacent_rate(lq_sta->drv, |
be663ab6 WYG |
776 | scale_index, rate_mask, |
777 | tbl->lq_type); | |
778 | low = high_low & 0xff; | |
779 | ||
e2ebc833 | 780 | if (low == IL_RATE_INVALID) |
be663ab6 WYG |
781 | low = scale_index; |
782 | ||
783 | out: | |
e2ebc833 | 784 | return il4965_rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
be663ab6 WYG |
785 | } |
786 | ||
787 | /* | |
788 | * Simple function to compare two rate scale table types | |
789 | */ | |
e2ebc833 SG |
790 | static bool il4965_table_type_matches(struct il_scale_tbl_info *a, |
791 | struct il_scale_tbl_info *b) | |
be663ab6 WYG |
792 | { |
793 | return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) && | |
794 | (a->is_SGI == b->is_SGI); | |
795 | } | |
796 | ||
797 | /* | |
798 | * mac80211 sends us Tx status | |
799 | */ | |
800 | static void | |
e2ebc833 | 801 | il4965_rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
be663ab6 WYG |
802 | struct ieee80211_sta *sta, void *priv_sta, |
803 | struct sk_buff *skb) | |
804 | { | |
805 | int legacy_success; | |
806 | int retries; | |
807 | int rs_index, mac_index, i; | |
e2ebc833 SG |
808 | struct il_lq_sta *lq_sta = priv_sta; |
809 | struct il_link_quality_cmd *table; | |
be663ab6 | 810 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e2ebc833 | 811 | struct il_priv *priv = (struct il_priv *)priv_r; |
be663ab6 WYG |
812 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
813 | enum mac80211_rate_control_flags mac_flags; | |
814 | u32 tx_rate; | |
e2ebc833 SG |
815 | struct il_scale_tbl_info tbl_type; |
816 | struct il_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; | |
817 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; | |
818 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 | 819 | |
e2ebc833 | 820 | IL_DEBUG_RATE_LIMIT(priv, |
be663ab6 WYG |
821 | "get frame ack response, update rate scale window\n"); |
822 | ||
823 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
824 | if (!lq_sta) { | |
e2ebc833 | 825 | IL_DEBUG_RATE(priv, "Station rate scaling not created yet.\n"); |
be663ab6 WYG |
826 | return; |
827 | } else if (!lq_sta->drv) { | |
e2ebc833 | 828 | IL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); |
be663ab6 WYG |
829 | return; |
830 | } | |
831 | ||
832 | if (!ieee80211_is_data(hdr->frame_control) || | |
833 | info->flags & IEEE80211_TX_CTL_NO_ACK) | |
834 | return; | |
835 | ||
836 | /* This packet was aggregated but doesn't carry status info */ | |
837 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
838 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
839 | return; | |
840 | ||
841 | /* | |
842 | * Ignore this Tx frame response if its initial rate doesn't match | |
843 | * that of latest Link Quality command. There may be stragglers | |
844 | * from a previous Link Quality command, but we're no longer interested | |
845 | * in those; they're either from the "active" mode while we're trying | |
846 | * to check "search" mode, or a prior "search" mode after we've moved | |
847 | * to a new "search" mode (which might become the new "active" mode). | |
848 | */ | |
849 | table = &lq_sta->lq; | |
850 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
e2ebc833 | 851 | il4965_rs_get_tbl_info_from_mcs(tx_rate, |
be663ab6 WYG |
852 | priv->band, &tbl_type, &rs_index); |
853 | if (priv->band == IEEE80211_BAND_5GHZ) | |
e2ebc833 | 854 | rs_index -= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
855 | mac_flags = info->status.rates[0].flags; |
856 | mac_index = info->status.rates[0].idx; | |
857 | /* For HT packets, map MCS to PLCP */ | |
858 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
859 | mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ | |
e2ebc833 | 860 | if (mac_index >= (IL_RATE_9M_INDEX - IL_FIRST_OFDM_RATE)) |
be663ab6 WYG |
861 | mac_index++; |
862 | /* | |
863 | * mac80211 HT index is always zero-indexed; we need to move | |
864 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
865 | */ | |
866 | if (priv->band == IEEE80211_BAND_2GHZ) | |
e2ebc833 | 867 | mac_index += IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
868 | } |
869 | /* Here we actually compare this rate to the latest LQ command */ | |
870 | if ((mac_index < 0) || | |
871 | (tbl_type.is_SGI != | |
872 | !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || | |
873 | (tbl_type.is_ht40 != | |
874 | !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
875 | (tbl_type.is_dup != | |
876 | !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) || | |
877 | (tbl_type.ant_type != info->antenna_sel_tx) || | |
878 | (!!(tx_rate & RATE_MCS_HT_MSK) != | |
879 | !!(mac_flags & IEEE80211_TX_RC_MCS)) || | |
880 | (!!(tx_rate & RATE_MCS_GF_MSK) != | |
881 | !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
882 | (rs_index != mac_index)) { | |
e2ebc833 | 883 | IL_DEBUG_RATE(priv, |
be663ab6 WYG |
884 | "initial rate %d does not match %d (0x%x)\n", |
885 | mac_index, rs_index, tx_rate); | |
886 | /* | |
887 | * Since rates mis-match, the last LQ command may have failed. | |
e2ebc833 | 888 | * After IL_MISSED_RATE_MAX mis-matches, resync the uCode with |
be663ab6 WYG |
889 | * ... driver. |
890 | */ | |
891 | lq_sta->missed_rate_counter++; | |
e2ebc833 | 892 | if (lq_sta->missed_rate_counter > IL_MISSED_RATE_MAX) { |
be663ab6 | 893 | lq_sta->missed_rate_counter = 0; |
e2ebc833 | 894 | il_send_lq_cmd(priv, ctx, &lq_sta->lq, |
be663ab6 WYG |
895 | CMD_ASYNC, false); |
896 | } | |
897 | /* Regardless, ignore this status info for outdated rate */ | |
898 | return; | |
899 | } else | |
900 | /* Rate did match, so reset the missed_rate_counter */ | |
901 | lq_sta->missed_rate_counter = 0; | |
902 | ||
903 | /* Figure out if rate scale algorithm is in active or search table */ | |
e2ebc833 | 904 | if (il4965_table_type_matches(&tbl_type, |
be663ab6 WYG |
905 | &(lq_sta->lq_info[lq_sta->active_tbl]))) { |
906 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
907 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
e2ebc833 | 908 | } else if (il4965_table_type_matches(&tbl_type, |
be663ab6 WYG |
909 | &lq_sta->lq_info[1 - lq_sta->active_tbl])) { |
910 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
911 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
912 | } else { | |
e2ebc833 | 913 | IL_DEBUG_RATE(priv, |
be663ab6 WYG |
914 | "Neither active nor search matches tx rate\n"); |
915 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
e2ebc833 | 916 | IL_DEBUG_RATE(priv, "active- lq:%x, ant:%x, SGI:%d\n", |
be663ab6 WYG |
917 | tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); |
918 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
e2ebc833 | 919 | IL_DEBUG_RATE(priv, "search- lq:%x, ant:%x, SGI:%d\n", |
be663ab6 | 920 | tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); |
e2ebc833 | 921 | IL_DEBUG_RATE(priv, "actual- lq:%x, ant:%x, SGI:%d\n", |
be663ab6 WYG |
922 | tbl_type.lq_type, tbl_type.ant_type, tbl_type.is_SGI); |
923 | /* | |
924 | * no matching table found, let's by-pass the data collection | |
925 | * and continue to perform rate scale to find the rate table | |
926 | */ | |
e2ebc833 | 927 | il4965_rs_stay_in_table(lq_sta, true); |
be663ab6 WYG |
928 | goto done; |
929 | } | |
930 | ||
931 | /* | |
932 | * Updating the frame history depends on whether packets were | |
933 | * aggregated. | |
934 | * | |
935 | * For aggregation, all packets were transmitted at the same rate, the | |
936 | * first index into rate scale table. | |
937 | */ | |
938 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
939 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
e2ebc833 | 940 | il4965_rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, |
be663ab6 | 941 | &rs_index); |
e2ebc833 | 942 | il4965_rs_collect_tx_data(curr_tbl, rs_index, |
be663ab6 WYG |
943 | info->status.ampdu_len, |
944 | info->status.ampdu_ack_len); | |
945 | ||
946 | /* Update success/fail counts if not searching for new mode */ | |
947 | if (lq_sta->stay_in_tbl) { | |
948 | lq_sta->total_success += info->status.ampdu_ack_len; | |
949 | lq_sta->total_failed += (info->status.ampdu_len - | |
950 | info->status.ampdu_ack_len); | |
951 | } | |
952 | } else { | |
953 | /* | |
954 | * For legacy, update frame history with for each Tx retry. | |
955 | */ | |
956 | retries = info->status.rates[0].count - 1; | |
957 | /* HW doesn't send more than 15 retries */ | |
958 | retries = min(retries, 15); | |
959 | ||
960 | /* The last transmission may have been successful */ | |
961 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
962 | /* Collect data for each rate used during failed TX attempts */ | |
963 | for (i = 0; i <= retries; ++i) { | |
964 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
e2ebc833 | 965 | il4965_rs_get_tbl_info_from_mcs(tx_rate, priv->band, |
be663ab6 WYG |
966 | &tbl_type, &rs_index); |
967 | /* | |
968 | * Only collect stats if retried rate is in the same RS | |
969 | * table as active/search. | |
970 | */ | |
e2ebc833 | 971 | if (il4965_table_type_matches(&tbl_type, curr_tbl)) |
be663ab6 | 972 | tmp_tbl = curr_tbl; |
e2ebc833 | 973 | else if (il4965_table_type_matches(&tbl_type, |
be663ab6 WYG |
974 | other_tbl)) |
975 | tmp_tbl = other_tbl; | |
976 | else | |
977 | continue; | |
e2ebc833 | 978 | il4965_rs_collect_tx_data(tmp_tbl, rs_index, 1, |
be663ab6 WYG |
979 | i < retries ? 0 : legacy_success); |
980 | } | |
981 | ||
982 | /* Update success/fail counts if not searching for new mode */ | |
983 | if (lq_sta->stay_in_tbl) { | |
984 | lq_sta->total_success += legacy_success; | |
985 | lq_sta->total_failed += retries + (1 - legacy_success); | |
986 | } | |
987 | } | |
988 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
989 | lq_sta->last_rate_n_flags = tx_rate; | |
990 | done: | |
991 | /* See if there's a better rate or modulation mode to try. */ | |
992 | if (sta && sta->supp_rates[sband->band]) | |
e2ebc833 | 993 | il4965_rs_rate_scale_perform(priv, skb, sta, lq_sta); |
be663ab6 WYG |
994 | } |
995 | ||
996 | /* | |
997 | * Begin a period of staying with a selected modulation mode. | |
998 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
999 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1000 | * and reset overall (spanning all rates) tx success history statistics. | |
1001 | * These control how long we stay using same modulation mode before | |
1002 | * searching for a new mode. | |
1003 | */ | |
e2ebc833 SG |
1004 | static void il4965_rs_set_stay_in_table(struct il_priv *priv, u8 is_legacy, |
1005 | struct il_lq_sta *lq_sta) | |
be663ab6 | 1006 | { |
e2ebc833 | 1007 | IL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
be663ab6 WYG |
1008 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
1009 | if (is_legacy) { | |
e2ebc833 SG |
1010 | lq_sta->table_count_limit = IL_LEGACY_TABLE_COUNT; |
1011 | lq_sta->max_failure_limit = IL_LEGACY_FAILURE_LIMIT; | |
1012 | lq_sta->max_success_limit = IL_LEGACY_SUCCESS_LIMIT; | |
be663ab6 | 1013 | } else { |
e2ebc833 SG |
1014 | lq_sta->table_count_limit = IL_NONE_LEGACY_TABLE_COUNT; |
1015 | lq_sta->max_failure_limit = IL_NONE_LEGACY_FAILURE_LIMIT; | |
1016 | lq_sta->max_success_limit = IL_NONE_LEGACY_SUCCESS_LIMIT; | |
be663ab6 WYG |
1017 | } |
1018 | lq_sta->table_count = 0; | |
1019 | lq_sta->total_failed = 0; | |
1020 | lq_sta->total_success = 0; | |
1021 | lq_sta->flush_timer = jiffies; | |
1022 | lq_sta->action_counter = 0; | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * Find correct throughput table for given mode of modulation | |
1027 | */ | |
e2ebc833 SG |
1028 | static void il4965_rs_set_expected_tpt_table(struct il_lq_sta *lq_sta, |
1029 | struct il_scale_tbl_info *tbl) | |
be663ab6 WYG |
1030 | { |
1031 | /* Used to choose among HT tables */ | |
e2ebc833 | 1032 | s32 (*ht_tbl_pointer)[IL_RATE_COUNT]; |
be663ab6 WYG |
1033 | |
1034 | /* Check for invalid LQ type */ | |
1035 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
1036 | tbl->expected_tpt = expected_tpt_legacy; | |
1037 | return; | |
1038 | } | |
1039 | ||
1040 | /* Legacy rates have only one table */ | |
1041 | if (is_legacy(tbl->lq_type)) { | |
1042 | tbl->expected_tpt = expected_tpt_legacy; | |
1043 | return; | |
1044 | } | |
1045 | ||
1046 | /* Choose among many HT tables depending on number of streams | |
1047 | * (SISO/MIMO2), channel width (20/40), SGI, and aggregation | |
1048 | * status */ | |
1049 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1050 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
1051 | else if (is_siso(tbl->lq_type)) | |
1052 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
1053 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1054 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1055 | else /* if (is_mimo2(tbl->lq_type)) <-- must be true */ | |
1056 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1057 | ||
1058 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ | |
1059 | tbl->expected_tpt = ht_tbl_pointer[0]; | |
1060 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
1061 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
1062 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
1063 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
1064 | else /* AGG+SGI */ | |
1065 | tbl->expected_tpt = ht_tbl_pointer[3]; | |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1070 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1071 | * above the current measured throughput of "active" mode, to give new mode | |
1072 | * a fair chance to prove itself without too many challenges. | |
1073 | * | |
1074 | * This gets called when transitioning to more aggressive modulation | |
1075 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1076 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1077 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1078 | * bit rate will typically need to increase, but not if performance was bad. | |
1079 | */ | |
e2ebc833 SG |
1080 | static s32 il4965_rs_get_best_rate(struct il_priv *priv, |
1081 | struct il_lq_sta *lq_sta, | |
1082 | struct il_scale_tbl_info *tbl, /* "search" */ | |
be663ab6 WYG |
1083 | u16 rate_mask, s8 index) |
1084 | { | |
1085 | /* "active" values */ | |
e2ebc833 | 1086 | struct il_scale_tbl_info *active_tbl = |
be663ab6 WYG |
1087 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
1088 | s32 active_sr = active_tbl->win[index].success_ratio; | |
1089 | s32 active_tpt = active_tbl->expected_tpt[index]; | |
1090 | ||
1091 | /* expected "search" throughput */ | |
1092 | s32 *tpt_tbl = tbl->expected_tpt; | |
1093 | ||
1094 | s32 new_rate, high, low, start_hi; | |
1095 | u16 high_low; | |
1096 | s8 rate = index; | |
1097 | ||
e2ebc833 | 1098 | new_rate = high = low = start_hi = IL_RATE_INVALID; |
be663ab6 WYG |
1099 | |
1100 | for (; ;) { | |
e2ebc833 | 1101 | high_low = il4965_rs_get_adjacent_rate(priv, rate, rate_mask, |
be663ab6 WYG |
1102 | tbl->lq_type); |
1103 | ||
1104 | low = high_low & 0xff; | |
1105 | high = (high_low >> 8) & 0xff; | |
1106 | ||
1107 | /* | |
1108 | * Lower the "search" bit rate, to give new "search" mode | |
1109 | * approximately the same throughput as "active" if: | |
1110 | * | |
1111 | * 1) "Active" mode has been working modestly well (but not | |
1112 | * great), and expected "search" throughput (under perfect | |
1113 | * conditions) at candidate rate is above the actual | |
1114 | * measured "active" throughput (but less than expected | |
1115 | * "active" throughput under perfect conditions). | |
1116 | * OR | |
1117 | * 2) "Active" mode has been working perfectly or very well | |
1118 | * and expected "search" throughput (under perfect | |
1119 | * conditions) at candidate rate is above expected | |
1120 | * "active" throughput (under perfect conditions). | |
1121 | */ | |
1122 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && | |
e2ebc833 SG |
1123 | ((active_sr > IL_RATE_DECREASE_TH) && |
1124 | (active_sr <= IL_RATE_HIGH_TH) && | |
be663ab6 | 1125 | (tpt_tbl[rate] <= active_tpt))) || |
e2ebc833 | 1126 | ((active_sr >= IL_RATE_SCALE_SWITCH) && |
be663ab6 WYG |
1127 | (tpt_tbl[rate] > active_tpt))) { |
1128 | ||
1129 | /* (2nd or later pass) | |
1130 | * If we've already tried to raise the rate, and are | |
1131 | * now trying to lower it, use the higher rate. */ | |
e2ebc833 | 1132 | if (start_hi != IL_RATE_INVALID) { |
be663ab6 WYG |
1133 | new_rate = start_hi; |
1134 | break; | |
1135 | } | |
1136 | ||
1137 | new_rate = rate; | |
1138 | ||
1139 | /* Loop again with lower rate */ | |
e2ebc833 | 1140 | if (low != IL_RATE_INVALID) |
be663ab6 WYG |
1141 | rate = low; |
1142 | ||
1143 | /* Lower rate not available, use the original */ | |
1144 | else | |
1145 | break; | |
1146 | ||
1147 | /* Else try to raise the "search" rate to match "active" */ | |
1148 | } else { | |
1149 | /* (2nd or later pass) | |
1150 | * If we've already tried to lower the rate, and are | |
1151 | * now trying to raise it, use the lower rate. */ | |
e2ebc833 | 1152 | if (new_rate != IL_RATE_INVALID) |
be663ab6 WYG |
1153 | break; |
1154 | ||
1155 | /* Loop again with higher rate */ | |
e2ebc833 | 1156 | else if (high != IL_RATE_INVALID) { |
be663ab6 WYG |
1157 | start_hi = high; |
1158 | rate = high; | |
1159 | ||
1160 | /* Higher rate not available, use the original */ | |
1161 | } else { | |
1162 | new_rate = rate; | |
1163 | break; | |
1164 | } | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | return new_rate; | |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | * Set up search table for MIMO2 | |
1173 | */ | |
e2ebc833 SG |
1174 | static int il4965_rs_switch_to_mimo2(struct il_priv *priv, |
1175 | struct il_lq_sta *lq_sta, | |
be663ab6 WYG |
1176 | struct ieee80211_conf *conf, |
1177 | struct ieee80211_sta *sta, | |
e2ebc833 | 1178 | struct il_scale_tbl_info *tbl, int index) |
be663ab6 WYG |
1179 | { |
1180 | u16 rate_mask; | |
1181 | s32 rate; | |
1182 | s8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1183 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; |
1184 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 WYG |
1185 | |
1186 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1187 | return -1; | |
1188 | ||
1189 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) | |
1190 | == WLAN_HT_CAP_SM_PS_STATIC) | |
1191 | return -1; | |
1192 | ||
1193 | /* Need both Tx chains/antennas to support MIMO */ | |
1194 | if (priv->hw_params.tx_chains_num < 2) | |
1195 | return -1; | |
1196 | ||
e2ebc833 | 1197 | IL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
be663ab6 WYG |
1198 | |
1199 | tbl->lq_type = LQ_MIMO2; | |
1200 | tbl->is_dup = lq_sta->is_dup; | |
1201 | tbl->action = 0; | |
e2ebc833 | 1202 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
1203 | rate_mask = lq_sta->active_mimo2_rate; |
1204 | ||
e2ebc833 | 1205 | if (il_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
be663ab6 WYG |
1206 | tbl->is_ht40 = 1; |
1207 | else | |
1208 | tbl->is_ht40 = 0; | |
1209 | ||
e2ebc833 | 1210 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
be663ab6 | 1211 | |
e2ebc833 | 1212 | rate = il4965_rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
be663ab6 | 1213 | |
e2ebc833 | 1214 | IL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", |
be663ab6 | 1215 | rate, rate_mask); |
e2ebc833 SG |
1216 | if ((rate == IL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
1217 | IL_DEBUG_RATE(priv, | |
be663ab6 WYG |
1218 | "Can't switch with index %d rate mask %x\n", |
1219 | rate, rate_mask); | |
1220 | return -1; | |
1221 | } | |
e2ebc833 | 1222 | tbl->current_rate = il4965_rate_n_flags_from_tbl(priv, |
be663ab6 WYG |
1223 | tbl, rate, is_green); |
1224 | ||
e2ebc833 | 1225 | IL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
be663ab6 WYG |
1226 | tbl->current_rate, is_green); |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * Set up search table for SISO | |
1232 | */ | |
e2ebc833 SG |
1233 | static int il4965_rs_switch_to_siso(struct il_priv *priv, |
1234 | struct il_lq_sta *lq_sta, | |
be663ab6 WYG |
1235 | struct ieee80211_conf *conf, |
1236 | struct ieee80211_sta *sta, | |
e2ebc833 | 1237 | struct il_scale_tbl_info *tbl, int index) |
be663ab6 WYG |
1238 | { |
1239 | u16 rate_mask; | |
1240 | u8 is_green = lq_sta->is_green; | |
1241 | s32 rate; | |
e2ebc833 SG |
1242 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; |
1243 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 WYG |
1244 | |
1245 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1246 | return -1; | |
1247 | ||
e2ebc833 | 1248 | IL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n"); |
be663ab6 WYG |
1249 | |
1250 | tbl->is_dup = lq_sta->is_dup; | |
1251 | tbl->lq_type = LQ_SISO; | |
1252 | tbl->action = 0; | |
e2ebc833 | 1253 | tbl->max_search = IL_MAX_SEARCH; |
be663ab6 WYG |
1254 | rate_mask = lq_sta->active_siso_rate; |
1255 | ||
e2ebc833 | 1256 | if (il_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
be663ab6 WYG |
1257 | tbl->is_ht40 = 1; |
1258 | else | |
1259 | tbl->is_ht40 = 0; | |
1260 | ||
1261 | if (is_green) | |
1262 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ | |
1263 | ||
e2ebc833 SG |
1264 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
1265 | rate = il4965_rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); | |
be663ab6 | 1266 | |
e2ebc833 SG |
1267 | IL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
1268 | if ((rate == IL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
1269 | IL_DEBUG_RATE(priv, | |
be663ab6 WYG |
1270 | "can not switch with index %d rate mask %x\n", |
1271 | rate, rate_mask); | |
1272 | return -1; | |
1273 | } | |
e2ebc833 | 1274 | tbl->current_rate = il4965_rate_n_flags_from_tbl(priv, |
be663ab6 | 1275 | tbl, rate, is_green); |
e2ebc833 | 1276 | IL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
be663ab6 WYG |
1277 | tbl->current_rate, is_green); |
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * Try to switch to new modulation mode from legacy | |
1283 | */ | |
e2ebc833 SG |
1284 | static int il4965_rs_move_legacy_other(struct il_priv *priv, |
1285 | struct il_lq_sta *lq_sta, | |
be663ab6 WYG |
1286 | struct ieee80211_conf *conf, |
1287 | struct ieee80211_sta *sta, | |
1288 | int index) | |
1289 | { | |
e2ebc833 SG |
1290 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1291 | struct il_scale_tbl_info *search_tbl = | |
be663ab6 | 1292 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
e2ebc833 SG |
1293 | struct il_rate_scale_data *window = &(tbl->win[index]); |
1294 | u32 sz = (sizeof(struct il_scale_tbl_info) - | |
1295 | (sizeof(struct il_rate_scale_data) * IL_RATE_COUNT)); | |
be663ab6 WYG |
1296 | u8 start_action; |
1297 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; | |
1298 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
1299 | int ret = 0; | |
1300 | u8 update_search_tbl_counter = 0; | |
1301 | ||
e2ebc833 | 1302 | tbl->action = IL_LEGACY_SWITCH_SISO; |
be663ab6 WYG |
1303 | |
1304 | start_action = tbl->action; | |
1305 | for (; ;) { | |
1306 | lq_sta->action_counter++; | |
1307 | switch (tbl->action) { | |
e2ebc833 SG |
1308 | case IL_LEGACY_SWITCH_ANTENNA1: |
1309 | case IL_LEGACY_SWITCH_ANTENNA2: | |
1310 | IL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); | |
be663ab6 | 1311 | |
e2ebc833 | 1312 | if ((tbl->action == IL_LEGACY_SWITCH_ANTENNA1 && |
be663ab6 | 1313 | tx_chains_num <= 1) || |
e2ebc833 | 1314 | (tbl->action == IL_LEGACY_SWITCH_ANTENNA2 && |
be663ab6 WYG |
1315 | tx_chains_num <= 2)) |
1316 | break; | |
1317 | ||
1318 | /* Don't change antenna if success has been great */ | |
e2ebc833 | 1319 | if (window->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1320 | break; |
1321 | ||
1322 | /* Set up search table to try other antenna */ | |
1323 | memcpy(search_tbl, tbl, sz); | |
1324 | ||
e2ebc833 | 1325 | if (il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
1326 | &search_tbl->current_rate, search_tbl)) { |
1327 | update_search_tbl_counter = 1; | |
e2ebc833 | 1328 | il4965_rs_set_expected_tpt_table(lq_sta, |
be663ab6 WYG |
1329 | search_tbl); |
1330 | goto out; | |
1331 | } | |
1332 | break; | |
e2ebc833 SG |
1333 | case IL_LEGACY_SWITCH_SISO: |
1334 | IL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); | |
be663ab6 WYG |
1335 | |
1336 | /* Set up search table to try SISO */ | |
1337 | memcpy(search_tbl, tbl, sz); | |
1338 | search_tbl->is_SGI = 0; | |
e2ebc833 | 1339 | ret = il4965_rs_switch_to_siso(priv, lq_sta, conf, sta, |
be663ab6 WYG |
1340 | search_tbl, index); |
1341 | if (!ret) { | |
1342 | lq_sta->action_counter = 0; | |
1343 | goto out; | |
1344 | } | |
1345 | ||
1346 | break; | |
e2ebc833 SG |
1347 | case IL_LEGACY_SWITCH_MIMO2_AB: |
1348 | case IL_LEGACY_SWITCH_MIMO2_AC: | |
1349 | case IL_LEGACY_SWITCH_MIMO2_BC: | |
1350 | IL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); | |
be663ab6 WYG |
1351 | |
1352 | /* Set up search table to try MIMO */ | |
1353 | memcpy(search_tbl, tbl, sz); | |
1354 | search_tbl->is_SGI = 0; | |
1355 | ||
e2ebc833 | 1356 | if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AB) |
be663ab6 | 1357 | search_tbl->ant_type = ANT_AB; |
e2ebc833 | 1358 | else if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AC) |
be663ab6 WYG |
1359 | search_tbl->ant_type = ANT_AC; |
1360 | else | |
1361 | search_tbl->ant_type = ANT_BC; | |
1362 | ||
e2ebc833 | 1363 | if (!il4965_rs_is_valid_ant(valid_tx_ant, |
be663ab6 WYG |
1364 | search_tbl->ant_type)) |
1365 | break; | |
1366 | ||
e2ebc833 | 1367 | ret = il4965_rs_switch_to_mimo2(priv, lq_sta, |
be663ab6 WYG |
1368 | conf, sta, |
1369 | search_tbl, index); | |
1370 | if (!ret) { | |
1371 | lq_sta->action_counter = 0; | |
1372 | goto out; | |
1373 | } | |
1374 | break; | |
1375 | } | |
1376 | tbl->action++; | |
e2ebc833 SG |
1377 | if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
1378 | tbl->action = IL_LEGACY_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1379 | |
1380 | if (tbl->action == start_action) | |
1381 | break; | |
1382 | ||
1383 | } | |
1384 | search_tbl->lq_type = LQ_NONE; | |
1385 | return 0; | |
1386 | ||
1387 | out: | |
1388 | lq_sta->search_better_tbl = 1; | |
1389 | tbl->action++; | |
e2ebc833 SG |
1390 | if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
1391 | tbl->action = IL_LEGACY_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1392 | if (update_search_tbl_counter) |
1393 | search_tbl->action = tbl->action; | |
1394 | return 0; | |
1395 | ||
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Try to switch to new modulation mode from SISO | |
1400 | */ | |
e2ebc833 SG |
1401 | static int il4965_rs_move_siso_to_other(struct il_priv *priv, |
1402 | struct il_lq_sta *lq_sta, | |
be663ab6 WYG |
1403 | struct ieee80211_conf *conf, |
1404 | struct ieee80211_sta *sta, int index) | |
1405 | { | |
1406 | u8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1407 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1408 | struct il_scale_tbl_info *search_tbl = | |
be663ab6 | 1409 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
e2ebc833 | 1410 | struct il_rate_scale_data *window = &(tbl->win[index]); |
be663ab6 | 1411 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e2ebc833 SG |
1412 | u32 sz = (sizeof(struct il_scale_tbl_info) - |
1413 | (sizeof(struct il_rate_scale_data) * IL_RATE_COUNT)); | |
be663ab6 WYG |
1414 | u8 start_action; |
1415 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; | |
1416 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
1417 | u8 update_search_tbl_counter = 0; | |
1418 | int ret; | |
1419 | ||
1420 | start_action = tbl->action; | |
1421 | ||
1422 | for (;;) { | |
1423 | lq_sta->action_counter++; | |
1424 | switch (tbl->action) { | |
e2ebc833 SG |
1425 | case IL_SISO_SWITCH_ANTENNA1: |
1426 | case IL_SISO_SWITCH_ANTENNA2: | |
1427 | IL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); | |
1428 | if ((tbl->action == IL_SISO_SWITCH_ANTENNA1 && | |
be663ab6 | 1429 | tx_chains_num <= 1) || |
e2ebc833 | 1430 | (tbl->action == IL_SISO_SWITCH_ANTENNA2 && |
be663ab6 WYG |
1431 | tx_chains_num <= 2)) |
1432 | break; | |
1433 | ||
e2ebc833 | 1434 | if (window->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1435 | break; |
1436 | ||
1437 | memcpy(search_tbl, tbl, sz); | |
e2ebc833 | 1438 | if (il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
1439 | &search_tbl->current_rate, search_tbl)) { |
1440 | update_search_tbl_counter = 1; | |
1441 | goto out; | |
1442 | } | |
1443 | break; | |
e2ebc833 SG |
1444 | case IL_SISO_SWITCH_MIMO2_AB: |
1445 | case IL_SISO_SWITCH_MIMO2_AC: | |
1446 | case IL_SISO_SWITCH_MIMO2_BC: | |
1447 | IL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); | |
be663ab6 WYG |
1448 | memcpy(search_tbl, tbl, sz); |
1449 | search_tbl->is_SGI = 0; | |
1450 | ||
e2ebc833 | 1451 | if (tbl->action == IL_SISO_SWITCH_MIMO2_AB) |
be663ab6 | 1452 | search_tbl->ant_type = ANT_AB; |
e2ebc833 | 1453 | else if (tbl->action == IL_SISO_SWITCH_MIMO2_AC) |
be663ab6 WYG |
1454 | search_tbl->ant_type = ANT_AC; |
1455 | else | |
1456 | search_tbl->ant_type = ANT_BC; | |
1457 | ||
e2ebc833 | 1458 | if (!il4965_rs_is_valid_ant(valid_tx_ant, |
be663ab6 WYG |
1459 | search_tbl->ant_type)) |
1460 | break; | |
1461 | ||
e2ebc833 | 1462 | ret = il4965_rs_switch_to_mimo2(priv, lq_sta, |
be663ab6 WYG |
1463 | conf, sta, |
1464 | search_tbl, index); | |
1465 | if (!ret) | |
1466 | goto out; | |
1467 | break; | |
e2ebc833 | 1468 | case IL_SISO_SWITCH_GI: |
be663ab6 WYG |
1469 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1470 | IEEE80211_HT_CAP_SGI_20)) | |
1471 | break; | |
1472 | if (tbl->is_ht40 && !(ht_cap->cap & | |
1473 | IEEE80211_HT_CAP_SGI_40)) | |
1474 | break; | |
1475 | ||
e2ebc833 | 1476 | IL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
be663ab6 WYG |
1477 | |
1478 | memcpy(search_tbl, tbl, sz); | |
1479 | if (is_green) { | |
1480 | if (!tbl->is_SGI) | |
1481 | break; | |
1482 | else | |
e2ebc833 | 1483 | IL_ERR(priv, |
be663ab6 WYG |
1484 | "SGI was set in GF+SISO\n"); |
1485 | } | |
1486 | search_tbl->is_SGI = !tbl->is_SGI; | |
e2ebc833 | 1487 | il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
be663ab6 WYG |
1488 | if (tbl->is_SGI) { |
1489 | s32 tpt = lq_sta->last_tpt / 100; | |
1490 | if (tpt >= search_tbl->expected_tpt[index]) | |
1491 | break; | |
1492 | } | |
1493 | search_tbl->current_rate = | |
e2ebc833 | 1494 | il4965_rate_n_flags_from_tbl(priv, search_tbl, |
be663ab6 WYG |
1495 | index, is_green); |
1496 | update_search_tbl_counter = 1; | |
1497 | goto out; | |
1498 | } | |
1499 | tbl->action++; | |
e2ebc833 SG |
1500 | if (tbl->action > IL_SISO_SWITCH_GI) |
1501 | tbl->action = IL_SISO_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1502 | |
1503 | if (tbl->action == start_action) | |
1504 | break; | |
1505 | } | |
1506 | search_tbl->lq_type = LQ_NONE; | |
1507 | return 0; | |
1508 | ||
1509 | out: | |
1510 | lq_sta->search_better_tbl = 1; | |
1511 | tbl->action++; | |
e2ebc833 SG |
1512 | if (tbl->action > IL_SISO_SWITCH_GI) |
1513 | tbl->action = IL_SISO_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1514 | if (update_search_tbl_counter) |
1515 | search_tbl->action = tbl->action; | |
1516 | ||
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | /* | |
1521 | * Try to switch to new modulation mode from MIMO2 | |
1522 | */ | |
e2ebc833 SG |
1523 | static int il4965_rs_move_mimo2_to_other(struct il_priv *priv, |
1524 | struct il_lq_sta *lq_sta, | |
be663ab6 WYG |
1525 | struct ieee80211_conf *conf, |
1526 | struct ieee80211_sta *sta, int index) | |
1527 | { | |
1528 | s8 is_green = lq_sta->is_green; | |
e2ebc833 SG |
1529 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1530 | struct il_scale_tbl_info *search_tbl = | |
be663ab6 | 1531 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
e2ebc833 | 1532 | struct il_rate_scale_data *window = &(tbl->win[index]); |
be663ab6 | 1533 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e2ebc833 SG |
1534 | u32 sz = (sizeof(struct il_scale_tbl_info) - |
1535 | (sizeof(struct il_rate_scale_data) * IL_RATE_COUNT)); | |
be663ab6 WYG |
1536 | u8 start_action; |
1537 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; | |
1538 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
1539 | u8 update_search_tbl_counter = 0; | |
1540 | int ret; | |
1541 | ||
1542 | start_action = tbl->action; | |
1543 | for (;;) { | |
1544 | lq_sta->action_counter++; | |
1545 | switch (tbl->action) { | |
e2ebc833 SG |
1546 | case IL_MIMO2_SWITCH_ANTENNA1: |
1547 | case IL_MIMO2_SWITCH_ANTENNA2: | |
1548 | IL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); | |
be663ab6 WYG |
1549 | |
1550 | if (tx_chains_num <= 2) | |
1551 | break; | |
1552 | ||
e2ebc833 | 1553 | if (window->success_ratio >= IL_RS_GOOD_RATIO) |
be663ab6 WYG |
1554 | break; |
1555 | ||
1556 | memcpy(search_tbl, tbl, sz); | |
e2ebc833 | 1557 | if (il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
1558 | &search_tbl->current_rate, search_tbl)) { |
1559 | update_search_tbl_counter = 1; | |
1560 | goto out; | |
1561 | } | |
1562 | break; | |
e2ebc833 SG |
1563 | case IL_MIMO2_SWITCH_SISO_A: |
1564 | case IL_MIMO2_SWITCH_SISO_B: | |
1565 | case IL_MIMO2_SWITCH_SISO_C: | |
1566 | IL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); | |
be663ab6 WYG |
1567 | |
1568 | /* Set up new search table for SISO */ | |
1569 | memcpy(search_tbl, tbl, sz); | |
1570 | ||
e2ebc833 | 1571 | if (tbl->action == IL_MIMO2_SWITCH_SISO_A) |
be663ab6 | 1572 | search_tbl->ant_type = ANT_A; |
e2ebc833 | 1573 | else if (tbl->action == IL_MIMO2_SWITCH_SISO_B) |
be663ab6 WYG |
1574 | search_tbl->ant_type = ANT_B; |
1575 | else | |
1576 | search_tbl->ant_type = ANT_C; | |
1577 | ||
e2ebc833 | 1578 | if (!il4965_rs_is_valid_ant(valid_tx_ant, |
be663ab6 WYG |
1579 | search_tbl->ant_type)) |
1580 | break; | |
1581 | ||
e2ebc833 | 1582 | ret = il4965_rs_switch_to_siso(priv, lq_sta, |
be663ab6 WYG |
1583 | conf, sta, |
1584 | search_tbl, index); | |
1585 | if (!ret) | |
1586 | goto out; | |
1587 | ||
1588 | break; | |
1589 | ||
e2ebc833 | 1590 | case IL_MIMO2_SWITCH_GI: |
be663ab6 WYG |
1591 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1592 | IEEE80211_HT_CAP_SGI_20)) | |
1593 | break; | |
1594 | if (tbl->is_ht40 && !(ht_cap->cap & | |
1595 | IEEE80211_HT_CAP_SGI_40)) | |
1596 | break; | |
1597 | ||
e2ebc833 | 1598 | IL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); |
be663ab6 WYG |
1599 | |
1600 | /* Set up new search table for MIMO2 */ | |
1601 | memcpy(search_tbl, tbl, sz); | |
1602 | search_tbl->is_SGI = !tbl->is_SGI; | |
e2ebc833 | 1603 | il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
be663ab6 WYG |
1604 | /* |
1605 | * If active table already uses the fastest possible | |
1606 | * modulation (dual stream with short guard interval), | |
1607 | * and it's working well, there's no need to look | |
1608 | * for a better type of modulation! | |
1609 | */ | |
1610 | if (tbl->is_SGI) { | |
1611 | s32 tpt = lq_sta->last_tpt / 100; | |
1612 | if (tpt >= search_tbl->expected_tpt[index]) | |
1613 | break; | |
1614 | } | |
1615 | search_tbl->current_rate = | |
e2ebc833 | 1616 | il4965_rate_n_flags_from_tbl(priv, search_tbl, |
be663ab6 WYG |
1617 | index, is_green); |
1618 | update_search_tbl_counter = 1; | |
1619 | goto out; | |
1620 | ||
1621 | } | |
1622 | tbl->action++; | |
e2ebc833 SG |
1623 | if (tbl->action > IL_MIMO2_SWITCH_GI) |
1624 | tbl->action = IL_MIMO2_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1625 | |
1626 | if (tbl->action == start_action) | |
1627 | break; | |
1628 | } | |
1629 | search_tbl->lq_type = LQ_NONE; | |
1630 | return 0; | |
1631 | out: | |
1632 | lq_sta->search_better_tbl = 1; | |
1633 | tbl->action++; | |
e2ebc833 SG |
1634 | if (tbl->action > IL_MIMO2_SWITCH_GI) |
1635 | tbl->action = IL_MIMO2_SWITCH_ANTENNA1; | |
be663ab6 WYG |
1636 | if (update_search_tbl_counter) |
1637 | search_tbl->action = tbl->action; | |
1638 | ||
1639 | return 0; | |
1640 | ||
1641 | } | |
1642 | ||
1643 | /* | |
1644 | * Check whether we should continue using same modulation mode, or | |
1645 | * begin search for a new mode, based on: | |
1646 | * 1) # tx successes or failures while using this mode | |
1647 | * 2) # times calling this function | |
1648 | * 3) elapsed time in this mode (not used, for now) | |
1649 | */ | |
1650 | static void | |
e2ebc833 | 1651 | il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, bool force_search) |
be663ab6 | 1652 | { |
e2ebc833 | 1653 | struct il_scale_tbl_info *tbl; |
be663ab6 WYG |
1654 | int i; |
1655 | int active_tbl; | |
1656 | int flush_interval_passed = 0; | |
e2ebc833 | 1657 | struct il_priv *priv; |
be663ab6 WYG |
1658 | |
1659 | priv = lq_sta->drv; | |
1660 | active_tbl = lq_sta->active_tbl; | |
1661 | ||
1662 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1663 | ||
1664 | /* If we've been disallowing search, see if we should now allow it */ | |
1665 | if (lq_sta->stay_in_tbl) { | |
1666 | ||
1667 | /* Elapsed time using current modulation mode */ | |
1668 | if (lq_sta->flush_timer) | |
1669 | flush_interval_passed = | |
1670 | time_after(jiffies, | |
1671 | (unsigned long)(lq_sta->flush_timer + | |
e2ebc833 | 1672 | IL_RATE_SCALE_FLUSH_INTVL)); |
be663ab6 WYG |
1673 | |
1674 | /* | |
1675 | * Check if we should allow search for new modulation mode. | |
1676 | * If many frames have failed or succeeded, or we've used | |
1677 | * this same modulation for a long time, allow search, and | |
1678 | * reset history stats that keep track of whether we should | |
1679 | * allow a new search. Also (below) reset all bitmaps and | |
1680 | * stats in active history. | |
1681 | */ | |
1682 | if (force_search || | |
1683 | (lq_sta->total_failed > lq_sta->max_failure_limit) || | |
1684 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1685 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
1686 | && (flush_interval_passed))) { | |
e2ebc833 | 1687 | IL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:", |
be663ab6 WYG |
1688 | lq_sta->total_failed, |
1689 | lq_sta->total_success, | |
1690 | flush_interval_passed); | |
1691 | ||
1692 | /* Allow search for new mode */ | |
1693 | lq_sta->stay_in_tbl = 0; /* only place reset */ | |
1694 | lq_sta->total_failed = 0; | |
1695 | lq_sta->total_success = 0; | |
1696 | lq_sta->flush_timer = 0; | |
1697 | ||
1698 | /* | |
1699 | * Else if we've used this modulation mode enough repetitions | |
1700 | * (regardless of elapsed time or success/failure), reset | |
1701 | * history bitmaps and rate-specific stats for all rates in | |
1702 | * active table. | |
1703 | */ | |
1704 | } else { | |
1705 | lq_sta->table_count++; | |
1706 | if (lq_sta->table_count >= | |
1707 | lq_sta->table_count_limit) { | |
1708 | lq_sta->table_count = 0; | |
1709 | ||
e2ebc833 | 1710 | IL_DEBUG_RATE(priv, |
be663ab6 | 1711 | "LQ: stay in table clear win\n"); |
e2ebc833 SG |
1712 | for (i = 0; i < IL_RATE_COUNT; i++) |
1713 | il4965_rs_rate_scale_clear_window( | |
be663ab6 WYG |
1714 | &(tbl->win[i])); |
1715 | } | |
1716 | } | |
1717 | ||
1718 | /* If transitioning to allow "search", reset all history | |
1719 | * bitmaps and stats in active table (this will become the new | |
1720 | * "search" table). */ | |
1721 | if (!lq_sta->stay_in_tbl) { | |
e2ebc833 SG |
1722 | for (i = 0; i < IL_RATE_COUNT; i++) |
1723 | il4965_rs_rate_scale_clear_window( | |
be663ab6 WYG |
1724 | &(tbl->win[i])); |
1725 | } | |
1726 | } | |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | * setup rate table in uCode | |
1731 | * return rate_n_flags as used in the table | |
1732 | */ | |
e2ebc833 SG |
1733 | static u32 il4965_rs_update_rate_tbl(struct il_priv *priv, |
1734 | struct il_rxon_context *ctx, | |
1735 | struct il_lq_sta *lq_sta, | |
1736 | struct il_scale_tbl_info *tbl, | |
be663ab6 WYG |
1737 | int index, u8 is_green) |
1738 | { | |
1739 | u32 rate; | |
1740 | ||
1741 | /* Update uCode's rate table. */ | |
e2ebc833 SG |
1742 | rate = il4965_rate_n_flags_from_tbl(priv, tbl, index, is_green); |
1743 | il4965_rs_fill_link_cmd(priv, lq_sta, rate); | |
1744 | il_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); | |
be663ab6 WYG |
1745 | |
1746 | return rate; | |
1747 | } | |
1748 | ||
1749 | /* | |
1750 | * Do rate scaling and search for new modulation mode. | |
1751 | */ | |
e2ebc833 | 1752 | static void il4965_rs_rate_scale_perform(struct il_priv *priv, |
be663ab6 WYG |
1753 | struct sk_buff *skb, |
1754 | struct ieee80211_sta *sta, | |
e2ebc833 | 1755 | struct il_lq_sta *lq_sta) |
be663ab6 WYG |
1756 | { |
1757 | struct ieee80211_hw *hw = priv->hw; | |
1758 | struct ieee80211_conf *conf = &hw->conf; | |
1759 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1760 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
e2ebc833 SG |
1761 | int low = IL_RATE_INVALID; |
1762 | int high = IL_RATE_INVALID; | |
be663ab6 WYG |
1763 | int index; |
1764 | int i; | |
e2ebc833 SG |
1765 | struct il_rate_scale_data *window = NULL; |
1766 | int current_tpt = IL_INVALID_VALUE; | |
1767 | int low_tpt = IL_INVALID_VALUE; | |
1768 | int high_tpt = IL_INVALID_VALUE; | |
be663ab6 WYG |
1769 | u32 fail_count; |
1770 | s8 scale_action = 0; | |
1771 | u16 rate_mask; | |
1772 | u8 update_lq = 0; | |
e2ebc833 | 1773 | struct il_scale_tbl_info *tbl, *tbl1; |
be663ab6 WYG |
1774 | u16 rate_scale_index_msk = 0; |
1775 | u32 rate; | |
1776 | u8 is_green = 0; | |
1777 | u8 active_tbl = 0; | |
1778 | u8 done_search = 0; | |
1779 | u16 high_low; | |
1780 | s32 sr; | |
1781 | u8 tid = MAX_TID_COUNT; | |
e2ebc833 SG |
1782 | struct il_tid_data *tid_data; |
1783 | struct il_station_priv *sta_priv = (void *)sta->drv_priv; | |
1784 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 | 1785 | |
e2ebc833 | 1786 | IL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
be663ab6 WYG |
1787 | |
1788 | /* Send management frames and NO_ACK data using lowest rate. */ | |
1789 | /* TODO: this could probably be improved.. */ | |
1790 | if (!ieee80211_is_data(hdr->frame_control) || | |
1791 | info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1792 | return; | |
1793 | ||
1794 | if (!sta || !lq_sta) | |
1795 | return; | |
1796 | ||
1797 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; | |
1798 | ||
e2ebc833 | 1799 | tid = il4965_rs_tl_add_packet(lq_sta, hdr); |
be663ab6 WYG |
1800 | if ((tid != MAX_TID_COUNT) && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
1801 | tid_data = &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
e2ebc833 | 1802 | if (tid_data->agg.state == IL_AGG_OFF) |
be663ab6 WYG |
1803 | lq_sta->is_agg = 0; |
1804 | else | |
1805 | lq_sta->is_agg = 1; | |
1806 | } else | |
1807 | lq_sta->is_agg = 0; | |
1808 | ||
1809 | /* | |
1810 | * Select rate-scale / modulation-mode table to work with in | |
1811 | * the rest of this function: "search" if searching for better | |
1812 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1813 | */ | |
1814 | if (!lq_sta->search_better_tbl) | |
1815 | active_tbl = lq_sta->active_tbl; | |
1816 | else | |
1817 | active_tbl = 1 - lq_sta->active_tbl; | |
1818 | ||
1819 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1820 | if (is_legacy(tbl->lq_type)) | |
1821 | lq_sta->is_green = 0; | |
1822 | else | |
e2ebc833 | 1823 | lq_sta->is_green = il4965_rs_use_green(sta); |
be663ab6 WYG |
1824 | is_green = lq_sta->is_green; |
1825 | ||
1826 | /* current tx rate */ | |
1827 | index = lq_sta->last_txrate_idx; | |
1828 | ||
e2ebc833 | 1829 | IL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
be663ab6 WYG |
1830 | tbl->lq_type); |
1831 | ||
1832 | /* rates available for this association, and for modulation mode */ | |
e2ebc833 | 1833 | rate_mask = il4965_rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
be663ab6 | 1834 | |
e2ebc833 | 1835 | IL_DEBUG_RATE(priv, "mask 0x%04X\n", rate_mask); |
be663ab6 WYG |
1836 | |
1837 | /* mask with station rate restriction */ | |
1838 | if (is_legacy(tbl->lq_type)) { | |
1839 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1840 | /* supp_rates has no CCK bits in A mode */ | |
1841 | rate_scale_index_msk = (u16) (rate_mask & | |
e2ebc833 | 1842 | (lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); |
be663ab6 WYG |
1843 | else |
1844 | rate_scale_index_msk = (u16) (rate_mask & | |
1845 | lq_sta->supp_rates); | |
1846 | ||
1847 | } else | |
1848 | rate_scale_index_msk = rate_mask; | |
1849 | ||
1850 | if (!rate_scale_index_msk) | |
1851 | rate_scale_index_msk = rate_mask; | |
1852 | ||
1853 | if (!((1 << index) & rate_scale_index_msk)) { | |
e2ebc833 | 1854 | IL_ERR(priv, "Current Rate is not valid\n"); |
be663ab6 WYG |
1855 | if (lq_sta->search_better_tbl) { |
1856 | /* revert to active table if search table is not valid*/ | |
1857 | tbl->lq_type = LQ_NONE; | |
1858 | lq_sta->search_better_tbl = 0; | |
1859 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1860 | /* get "active" rate info */ | |
e2ebc833 SG |
1861 | index = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
1862 | rate = il4965_rs_update_rate_tbl(priv, ctx, lq_sta, | |
be663ab6 WYG |
1863 | tbl, index, is_green); |
1864 | } | |
1865 | return; | |
1866 | } | |
1867 | ||
1868 | /* Get expected throughput table and history window for current rate */ | |
1869 | if (!tbl->expected_tpt) { | |
e2ebc833 | 1870 | IL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
be663ab6 WYG |
1871 | return; |
1872 | } | |
1873 | ||
1874 | /* force user max rate if set by user */ | |
1875 | if ((lq_sta->max_rate_idx != -1) && | |
1876 | (lq_sta->max_rate_idx < index)) { | |
1877 | index = lq_sta->max_rate_idx; | |
1878 | update_lq = 1; | |
1879 | window = &(tbl->win[index]); | |
1880 | goto lq_update; | |
1881 | } | |
1882 | ||
1883 | window = &(tbl->win[index]); | |
1884 | ||
1885 | /* | |
1886 | * If there is not enough history to calculate actual average | |
1887 | * throughput, keep analyzing results of more tx frames, without | |
1888 | * changing rate or mode (bypass most of the rest of this function). | |
1889 | * Set up new rate table in uCode only if old rate is not supported | |
1890 | * in current association (use new rate found above). | |
1891 | */ | |
1892 | fail_count = window->counter - window->success_counter; | |
e2ebc833 SG |
1893 | if ((fail_count < IL_RATE_MIN_FAILURE_TH) && |
1894 | (window->success_counter < IL_RATE_MIN_SUCCESS_TH)) { | |
1895 | IL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " | |
be663ab6 WYG |
1896 | "for index %d\n", |
1897 | window->success_counter, window->counter, index); | |
1898 | ||
1899 | /* Can't calculate this yet; not enough history */ | |
e2ebc833 | 1900 | window->average_tpt = IL_INVALID_VALUE; |
be663ab6 WYG |
1901 | |
1902 | /* Should we stay with this modulation mode, | |
1903 | * or search for a new one? */ | |
e2ebc833 | 1904 | il4965_rs_stay_in_table(lq_sta, false); |
be663ab6 WYG |
1905 | |
1906 | goto out; | |
1907 | } | |
1908 | /* Else we have enough samples; calculate estimate of | |
1909 | * actual average throughput */ | |
1910 | if (window->average_tpt != ((window->success_ratio * | |
1911 | tbl->expected_tpt[index] + 64) / 128)) { | |
e2ebc833 | 1912 | IL_ERR(priv, |
be663ab6 WYG |
1913 | "expected_tpt should have been calculated by now\n"); |
1914 | window->average_tpt = ((window->success_ratio * | |
1915 | tbl->expected_tpt[index] + 64) / 128); | |
1916 | } | |
1917 | ||
1918 | /* If we are searching for better modulation mode, check success. */ | |
1919 | if (lq_sta->search_better_tbl) { | |
1920 | /* If good success, continue using the "search" mode; | |
1921 | * no need to send new link quality command, since we're | |
1922 | * continuing to use the setup that we've been trying. */ | |
1923 | if (window->average_tpt > lq_sta->last_tpt) { | |
1924 | ||
e2ebc833 | 1925 | IL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
be663ab6 WYG |
1926 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1927 | window->success_ratio, | |
1928 | window->average_tpt, | |
1929 | lq_sta->last_tpt); | |
1930 | ||
1931 | if (!is_legacy(tbl->lq_type)) | |
1932 | lq_sta->enable_counter = 1; | |
1933 | ||
1934 | /* Swap tables; "search" becomes "active" */ | |
1935 | lq_sta->active_tbl = active_tbl; | |
1936 | current_tpt = window->average_tpt; | |
1937 | ||
1938 | /* Else poor success; go back to mode in "active" table */ | |
1939 | } else { | |
1940 | ||
e2ebc833 | 1941 | IL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
be663ab6 WYG |
1942 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
1943 | window->success_ratio, | |
1944 | window->average_tpt, | |
1945 | lq_sta->last_tpt); | |
1946 | ||
1947 | /* Nullify "search" table */ | |
1948 | tbl->lq_type = LQ_NONE; | |
1949 | ||
1950 | /* Revert to "active" table */ | |
1951 | active_tbl = lq_sta->active_tbl; | |
1952 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1953 | ||
1954 | /* Revert to "active" rate and throughput info */ | |
e2ebc833 | 1955 | index = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
be663ab6 WYG |
1956 | current_tpt = lq_sta->last_tpt; |
1957 | ||
1958 | /* Need to set up a new rate table in uCode */ | |
1959 | update_lq = 1; | |
1960 | } | |
1961 | ||
1962 | /* Either way, we've made a decision; modulation mode | |
1963 | * search is done, allow rate adjustment next time. */ | |
1964 | lq_sta->search_better_tbl = 0; | |
1965 | done_search = 1; /* Don't switch modes below! */ | |
1966 | goto lq_update; | |
1967 | } | |
1968 | ||
1969 | /* (Else) not in search of better modulation mode, try for better | |
1970 | * starting rate, while staying in this mode. */ | |
e2ebc833 | 1971 | high_low = il4965_rs_get_adjacent_rate(priv, index, |
be663ab6 WYG |
1972 | rate_scale_index_msk, |
1973 | tbl->lq_type); | |
1974 | low = high_low & 0xff; | |
1975 | high = (high_low >> 8) & 0xff; | |
1976 | ||
1977 | /* If user set max rate, dont allow higher than user constrain */ | |
1978 | if ((lq_sta->max_rate_idx != -1) && | |
1979 | (lq_sta->max_rate_idx < high)) | |
e2ebc833 | 1980 | high = IL_RATE_INVALID; |
be663ab6 WYG |
1981 | |
1982 | sr = window->success_ratio; | |
1983 | ||
1984 | /* Collect measured throughputs for current and adjacent rates */ | |
1985 | current_tpt = window->average_tpt; | |
e2ebc833 | 1986 | if (low != IL_RATE_INVALID) |
be663ab6 | 1987 | low_tpt = tbl->win[low].average_tpt; |
e2ebc833 | 1988 | if (high != IL_RATE_INVALID) |
be663ab6 WYG |
1989 | high_tpt = tbl->win[high].average_tpt; |
1990 | ||
1991 | scale_action = 0; | |
1992 | ||
1993 | /* Too many failures, decrease rate */ | |
e2ebc833 SG |
1994 | if ((sr <= IL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
1995 | IL_DEBUG_RATE(priv, | |
be663ab6 WYG |
1996 | "decrease rate because of low success_ratio\n"); |
1997 | scale_action = -1; | |
1998 | ||
1999 | /* No throughput measured yet for adjacent rates; try increase. */ | |
e2ebc833 SG |
2000 | } else if ((low_tpt == IL_INVALID_VALUE) && |
2001 | (high_tpt == IL_INVALID_VALUE)) { | |
be663ab6 | 2002 | |
e2ebc833 | 2003 | if (high != IL_RATE_INVALID && sr >= IL_RATE_INCREASE_TH) |
be663ab6 | 2004 | scale_action = 1; |
e2ebc833 | 2005 | else if (low != IL_RATE_INVALID) |
be663ab6 WYG |
2006 | scale_action = 0; |
2007 | } | |
2008 | ||
2009 | /* Both adjacent throughputs are measured, but neither one has better | |
2010 | * throughput; we're using the best rate, don't change it! */ | |
e2ebc833 SG |
2011 | else if ((low_tpt != IL_INVALID_VALUE) && |
2012 | (high_tpt != IL_INVALID_VALUE) && | |
be663ab6 WYG |
2013 | (low_tpt < current_tpt) && |
2014 | (high_tpt < current_tpt)) | |
2015 | scale_action = 0; | |
2016 | ||
2017 | /* At least one adjacent rate's throughput is measured, | |
2018 | * and may have better performance. */ | |
2019 | else { | |
2020 | /* Higher adjacent rate's throughput is measured */ | |
e2ebc833 | 2021 | if (high_tpt != IL_INVALID_VALUE) { |
be663ab6 WYG |
2022 | /* Higher rate has better throughput */ |
2023 | if (high_tpt > current_tpt && | |
e2ebc833 | 2024 | sr >= IL_RATE_INCREASE_TH) { |
be663ab6 WYG |
2025 | scale_action = 1; |
2026 | } else { | |
2027 | scale_action = 0; | |
2028 | } | |
2029 | ||
2030 | /* Lower adjacent rate's throughput is measured */ | |
e2ebc833 | 2031 | } else if (low_tpt != IL_INVALID_VALUE) { |
be663ab6 WYG |
2032 | /* Lower rate has better throughput */ |
2033 | if (low_tpt > current_tpt) { | |
e2ebc833 | 2034 | IL_DEBUG_RATE(priv, |
be663ab6 WYG |
2035 | "decrease rate because of low tpt\n"); |
2036 | scale_action = -1; | |
e2ebc833 | 2037 | } else if (sr >= IL_RATE_INCREASE_TH) { |
be663ab6 WYG |
2038 | scale_action = 1; |
2039 | } | |
2040 | } | |
2041 | } | |
2042 | ||
2043 | /* Sanity check; asked for decrease, but success rate or throughput | |
2044 | * has been good at old rate. Don't change it. */ | |
e2ebc833 SG |
2045 | if ((scale_action == -1) && (low != IL_RATE_INVALID) && |
2046 | ((sr > IL_RATE_HIGH_TH) || | |
be663ab6 WYG |
2047 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
2048 | scale_action = 0; | |
2049 | ||
2050 | switch (scale_action) { | |
2051 | case -1: | |
2052 | /* Decrease starting rate, update uCode's rate table */ | |
e2ebc833 | 2053 | if (low != IL_RATE_INVALID) { |
be663ab6 WYG |
2054 | update_lq = 1; |
2055 | index = low; | |
2056 | } | |
2057 | ||
2058 | break; | |
2059 | case 1: | |
2060 | /* Increase starting rate, update uCode's rate table */ | |
e2ebc833 | 2061 | if (high != IL_RATE_INVALID) { |
be663ab6 WYG |
2062 | update_lq = 1; |
2063 | index = high; | |
2064 | } | |
2065 | ||
2066 | break; | |
2067 | case 0: | |
2068 | /* No change */ | |
2069 | default: | |
2070 | break; | |
2071 | } | |
2072 | ||
e2ebc833 | 2073 | IL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
be663ab6 WYG |
2074 | "high %d type %d\n", |
2075 | index, scale_action, low, high, tbl->lq_type); | |
2076 | ||
2077 | lq_update: | |
2078 | /* Replace uCode's rate table for the destination station. */ | |
2079 | if (update_lq) | |
e2ebc833 | 2080 | rate = il4965_rs_update_rate_tbl(priv, ctx, lq_sta, |
be663ab6 WYG |
2081 | tbl, index, is_green); |
2082 | ||
2083 | /* Should we stay with this modulation mode, | |
2084 | * or search for a new one? */ | |
e2ebc833 | 2085 | il4965_rs_stay_in_table(lq_sta, false); |
be663ab6 WYG |
2086 | |
2087 | /* | |
2088 | * Search for new modulation mode if we're: | |
2089 | * 1) Not changing rates right now | |
2090 | * 2) Not just finishing up a search | |
2091 | * 3) Allowing a new search | |
2092 | */ | |
2093 | if (!update_lq && !done_search && | |
2094 | !lq_sta->stay_in_tbl && window->counter) { | |
2095 | /* Save current throughput to compare with "search" throughput*/ | |
2096 | lq_sta->last_tpt = current_tpt; | |
2097 | ||
2098 | /* Select a new "search" modulation mode to try. | |
2099 | * If one is found, set up the new "search" table. */ | |
2100 | if (is_legacy(tbl->lq_type)) | |
e2ebc833 | 2101 | il4965_rs_move_legacy_other(priv, lq_sta, |
be663ab6 WYG |
2102 | conf, sta, index); |
2103 | else if (is_siso(tbl->lq_type)) | |
e2ebc833 | 2104 | il4965_rs_move_siso_to_other(priv, lq_sta, |
be663ab6 WYG |
2105 | conf, sta, index); |
2106 | else /* (is_mimo2(tbl->lq_type)) */ | |
e2ebc833 | 2107 | il4965_rs_move_mimo2_to_other(priv, lq_sta, |
be663ab6 WYG |
2108 | conf, sta, index); |
2109 | ||
2110 | /* If new "search" mode was selected, set up in uCode table */ | |
2111 | if (lq_sta->search_better_tbl) { | |
2112 | /* Access the "search" table, clear its history. */ | |
2113 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
e2ebc833 SG |
2114 | for (i = 0; i < IL_RATE_COUNT; i++) |
2115 | il4965_rs_rate_scale_clear_window( | |
be663ab6 WYG |
2116 | &(tbl->win[i])); |
2117 | ||
2118 | /* Use new "search" start rate */ | |
e2ebc833 | 2119 | index = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
be663ab6 | 2120 | |
e2ebc833 | 2121 | IL_DEBUG_RATE(priv, |
be663ab6 WYG |
2122 | "Switch current mcs: %X index: %d\n", |
2123 | tbl->current_rate, index); | |
e2ebc833 | 2124 | il4965_rs_fill_link_cmd(priv, lq_sta, |
be663ab6 | 2125 | tbl->current_rate); |
e2ebc833 | 2126 | il_send_lq_cmd(priv, ctx, |
be663ab6 WYG |
2127 | &lq_sta->lq, CMD_ASYNC, false); |
2128 | } else | |
2129 | done_search = 1; | |
2130 | } | |
2131 | ||
2132 | if (done_search && !lq_sta->stay_in_tbl) { | |
2133 | /* If the "active" (non-search) mode was legacy, | |
2134 | * and we've tried switching antennas, | |
2135 | * but we haven't been able to try HT modes (not available), | |
2136 | * stay with best antenna legacy modulation for a while | |
2137 | * before next round of mode comparisons. */ | |
2138 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2139 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && | |
2140 | lq_sta->action_counter > tbl1->max_search) { | |
e2ebc833 SG |
2141 | IL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
2142 | il4965_rs_set_stay_in_table(priv, 1, lq_sta); | |
be663ab6 WYG |
2143 | } |
2144 | ||
2145 | /* If we're in an HT mode, and all 3 mode switch actions | |
2146 | * have been tried and compared, stay in this best modulation | |
2147 | * mode for a while before next round of mode comparisons. */ | |
2148 | if (lq_sta->enable_counter && | |
2149 | (lq_sta->action_counter >= tbl1->max_search)) { | |
e2ebc833 | 2150 | if ((lq_sta->last_tpt > IL_AGG_TPT_THREHOLD) && |
be663ab6 WYG |
2151 | (lq_sta->tx_agg_tid_en & (1 << tid)) && |
2152 | (tid != MAX_TID_COUNT)) { | |
2153 | tid_data = | |
2154 | &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
e2ebc833 SG |
2155 | if (tid_data->agg.state == IL_AGG_OFF) { |
2156 | IL_DEBUG_RATE(priv, | |
be663ab6 WYG |
2157 | "try to aggregate tid %d\n", |
2158 | tid); | |
e2ebc833 | 2159 | il4965_rs_tl_turn_on_agg(priv, tid, |
be663ab6 WYG |
2160 | lq_sta, sta); |
2161 | } | |
2162 | } | |
e2ebc833 | 2163 | il4965_rs_set_stay_in_table(priv, 0, lq_sta); |
be663ab6 WYG |
2164 | } |
2165 | } | |
2166 | ||
2167 | out: | |
e2ebc833 | 2168 | tbl->current_rate = il4965_rate_n_flags_from_tbl(priv, tbl, |
be663ab6 WYG |
2169 | index, is_green); |
2170 | i = index; | |
2171 | lq_sta->last_txrate_idx = i; | |
2172 | } | |
2173 | ||
2174 | /** | |
e2ebc833 | 2175 | * il4965_rs_initialize_lq - Initialize a station's hardware rate table |
be663ab6 WYG |
2176 | * |
2177 | * The uCode's station table contains a table of fallback rates | |
2178 | * for automatic fallback during transmission. | |
2179 | * | |
2180 | * NOTE: This sets up a default set of values. These will be replaced later | |
2181 | * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of | |
2182 | * rc80211_simple. | |
2183 | * | |
2184 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2185 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2186 | * which requires station table entry to exist). | |
2187 | */ | |
e2ebc833 | 2188 | static void il4965_rs_initialize_lq(struct il_priv *priv, |
be663ab6 WYG |
2189 | struct ieee80211_conf *conf, |
2190 | struct ieee80211_sta *sta, | |
e2ebc833 | 2191 | struct il_lq_sta *lq_sta) |
be663ab6 | 2192 | { |
e2ebc833 | 2193 | struct il_scale_tbl_info *tbl; |
be663ab6 WYG |
2194 | int rate_idx; |
2195 | int i; | |
2196 | u32 rate; | |
e2ebc833 | 2197 | u8 use_green = il4965_rs_use_green(sta); |
be663ab6 WYG |
2198 | u8 active_tbl = 0; |
2199 | u8 valid_tx_ant; | |
e2ebc833 SG |
2200 | struct il_station_priv *sta_priv; |
2201 | struct il_rxon_context *ctx; | |
be663ab6 WYG |
2202 | |
2203 | if (!sta || !lq_sta) | |
2204 | return; | |
2205 | ||
2206 | sta_priv = (void *)sta->drv_priv; | |
2207 | ctx = sta_priv->common.ctx; | |
2208 | ||
2209 | i = lq_sta->last_txrate_idx; | |
2210 | ||
2211 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2212 | ||
2213 | if (!lq_sta->search_better_tbl) | |
2214 | active_tbl = lq_sta->active_tbl; | |
2215 | else | |
2216 | active_tbl = 1 - lq_sta->active_tbl; | |
2217 | ||
2218 | tbl = &(lq_sta->lq_info[active_tbl]); | |
2219 | ||
e2ebc833 | 2220 | if ((i < 0) || (i >= IL_RATE_COUNT)) |
be663ab6 WYG |
2221 | i = 0; |
2222 | ||
ef33417d | 2223 | rate = iwlegacy_rates[i].plcp; |
e2ebc833 | 2224 | tbl->ant_type = il4965_first_antenna(valid_tx_ant); |
be663ab6 WYG |
2225 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; |
2226 | ||
e2ebc833 | 2227 | if (i >= IL_FIRST_CCK_RATE && i <= IL_LAST_CCK_RATE) |
be663ab6 WYG |
2228 | rate |= RATE_MCS_CCK_MSK; |
2229 | ||
e2ebc833 SG |
2230 | il4965_rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
2231 | if (!il4965_rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) | |
2232 | il4965_rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
be663ab6 | 2233 | |
e2ebc833 | 2234 | rate = il4965_rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
be663ab6 | 2235 | tbl->current_rate = rate; |
e2ebc833 SG |
2236 | il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
2237 | il4965_rs_fill_link_cmd(NULL, lq_sta, rate); | |
be663ab6 | 2238 | priv->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
e2ebc833 | 2239 | il_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_SYNC, true); |
be663ab6 WYG |
2240 | } |
2241 | ||
2242 | static void | |
e2ebc833 | 2243 | il4965_rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
be663ab6 WYG |
2244 | struct ieee80211_tx_rate_control *txrc) |
2245 | { | |
2246 | ||
2247 | struct sk_buff *skb = txrc->skb; | |
2248 | struct ieee80211_supported_band *sband = txrc->sband; | |
e2ebc833 | 2249 | struct il_priv *priv __maybe_unused = (struct il_priv *)priv_r; |
be663ab6 | 2250 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e2ebc833 | 2251 | struct il_lq_sta *lq_sta = priv_sta; |
be663ab6 WYG |
2252 | int rate_idx; |
2253 | ||
e2ebc833 | 2254 | IL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
be663ab6 WYG |
2255 | |
2256 | /* Get max rate if user set max rate */ | |
2257 | if (lq_sta) { | |
2258 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2259 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2260 | (lq_sta->max_rate_idx != -1)) | |
e2ebc833 | 2261 | lq_sta->max_rate_idx += IL_FIRST_OFDM_RATE; |
be663ab6 | 2262 | if ((lq_sta->max_rate_idx < 0) || |
e2ebc833 | 2263 | (lq_sta->max_rate_idx >= IL_RATE_COUNT)) |
be663ab6 WYG |
2264 | lq_sta->max_rate_idx = -1; |
2265 | } | |
2266 | ||
2267 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
2268 | if (lq_sta && !lq_sta->drv) { | |
e2ebc833 | 2269 | IL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); |
be663ab6 WYG |
2270 | priv_sta = NULL; |
2271 | } | |
2272 | ||
2273 | /* Send management frames and NO_ACK data using lowest rate. */ | |
2274 | if (rate_control_send_low(sta, priv_sta, txrc)) | |
2275 | return; | |
2276 | ||
0c34861e GD |
2277 | if (!lq_sta) |
2278 | return; | |
2279 | ||
be663ab6 WYG |
2280 | rate_idx = lq_sta->last_txrate_idx; |
2281 | ||
2282 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { | |
e2ebc833 | 2283 | rate_idx -= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2284 | /* 6M and 9M shared same MCS index */ |
2285 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; | |
e2ebc833 SG |
2286 | if (il4965_rs_extract_rate(lq_sta->last_rate_n_flags) >= |
2287 | IL_RATE_MIMO2_6M_PLCP) | |
be663ab6 WYG |
2288 | rate_idx = rate_idx + MCS_INDEX_PER_STREAM; |
2289 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; | |
2290 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2291 | info->control.rates[0].flags |= | |
2292 | IEEE80211_TX_RC_SHORT_GI; | |
2293 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) | |
2294 | info->control.rates[0].flags |= | |
2295 | IEEE80211_TX_RC_DUP_DATA; | |
2296 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) | |
2297 | info->control.rates[0].flags |= | |
2298 | IEEE80211_TX_RC_40_MHZ_WIDTH; | |
2299 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) | |
2300 | info->control.rates[0].flags |= | |
2301 | IEEE80211_TX_RC_GREEN_FIELD; | |
2302 | } else { | |
2303 | /* Check for invalid rates */ | |
e2ebc833 | 2304 | if ((rate_idx < 0) || (rate_idx >= IL_RATE_COUNT_LEGACY) || |
be663ab6 | 2305 | ((sband->band == IEEE80211_BAND_5GHZ) && |
e2ebc833 | 2306 | (rate_idx < IL_FIRST_OFDM_RATE))) |
be663ab6 WYG |
2307 | rate_idx = rate_lowest_index(sband, sta); |
2308 | /* On valid 5 GHz rate, adjust index */ | |
2309 | else if (sband->band == IEEE80211_BAND_5GHZ) | |
e2ebc833 | 2310 | rate_idx -= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2311 | info->control.rates[0].flags = 0; |
2312 | } | |
2313 | info->control.rates[0].idx = rate_idx; | |
2314 | ||
2315 | } | |
2316 | ||
e2ebc833 | 2317 | static void *il4965_rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
be663ab6 WYG |
2318 | gfp_t gfp) |
2319 | { | |
e2ebc833 SG |
2320 | struct il_lq_sta *lq_sta; |
2321 | struct il_station_priv *sta_priv = | |
2322 | (struct il_station_priv *) sta->drv_priv; | |
2323 | struct il_priv *priv; | |
be663ab6 | 2324 | |
e2ebc833 SG |
2325 | priv = (struct il_priv *)priv_rate; |
2326 | IL_DEBUG_RATE(priv, "create station rate scale window\n"); | |
be663ab6 WYG |
2327 | |
2328 | lq_sta = &sta_priv->lq_sta; | |
2329 | ||
2330 | return lq_sta; | |
2331 | } | |
2332 | ||
2333 | /* | |
2334 | * Called after adding a new station to initialize rate scaling | |
2335 | */ | |
2336 | void | |
e2ebc833 | 2337 | il4965_rs_rate_init(struct il_priv *priv, |
be663ab6 WYG |
2338 | struct ieee80211_sta *sta, |
2339 | u8 sta_id) | |
2340 | { | |
2341 | int i, j; | |
2342 | struct ieee80211_hw *hw = priv->hw; | |
2343 | struct ieee80211_conf *conf = &priv->hw->conf; | |
2344 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; | |
e2ebc833 SG |
2345 | struct il_station_priv *sta_priv; |
2346 | struct il_lq_sta *lq_sta; | |
be663ab6 WYG |
2347 | struct ieee80211_supported_band *sband; |
2348 | ||
e2ebc833 | 2349 | sta_priv = (struct il_station_priv *) sta->drv_priv; |
be663ab6 WYG |
2350 | lq_sta = &sta_priv->lq_sta; |
2351 | sband = hw->wiphy->bands[conf->channel->band]; | |
2352 | ||
2353 | ||
2354 | lq_sta->lq.sta_id = sta_id; | |
2355 | ||
2356 | for (j = 0; j < LQ_SIZE; j++) | |
e2ebc833 SG |
2357 | for (i = 0; i < IL_RATE_COUNT; i++) |
2358 | il4965_rs_rate_scale_clear_window( | |
be663ab6 WYG |
2359 | &lq_sta->lq_info[j].win[i]); |
2360 | ||
2361 | lq_sta->flush_timer = 0; | |
2362 | lq_sta->supp_rates = sta->supp_rates[sband->band]; | |
2363 | for (j = 0; j < LQ_SIZE; j++) | |
e2ebc833 SG |
2364 | for (i = 0; i < IL_RATE_COUNT; i++) |
2365 | il4965_rs_rate_scale_clear_window( | |
be663ab6 WYG |
2366 | &lq_sta->lq_info[j].win[i]); |
2367 | ||
e2ebc833 | 2368 | IL_DEBUG_RATE(priv, "LQ:" |
be663ab6 WYG |
2369 | "*** rate scale station global init for station %d ***\n", |
2370 | sta_id); | |
2371 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
2372 | * the lowest or the highest rate.. Could consider using RSSI from | |
2373 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2374 | * after assoc.. */ | |
2375 | ||
2376 | lq_sta->is_dup = 0; | |
2377 | lq_sta->max_rate_idx = -1; | |
e2ebc833 SG |
2378 | lq_sta->missed_rate_counter = IL_MISSED_RATE_MAX; |
2379 | lq_sta->is_green = il4965_rs_use_green(sta); | |
be663ab6 WYG |
2380 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
2381 | lq_sta->band = priv->band; | |
2382 | /* | |
2383 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2384 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2385 | */ | |
2386 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; | |
2387 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
2388 | lq_sta->active_siso_rate &= ~((u16)0x2); | |
e2ebc833 | 2389 | lq_sta->active_siso_rate <<= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2390 | |
2391 | /* Same here */ | |
2392 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; | |
2393 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
2394 | lq_sta->active_mimo2_rate &= ~((u16)0x2); | |
e2ebc833 | 2395 | lq_sta->active_mimo2_rate <<= IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2396 | |
2397 | /* These values will be overridden later */ | |
2398 | lq_sta->lq.general_params.single_stream_ant_msk = | |
e2ebc833 | 2399 | il4965_first_antenna(priv->hw_params.valid_tx_ant); |
be663ab6 WYG |
2400 | lq_sta->lq.general_params.dual_stream_ant_msk = |
2401 | priv->hw_params.valid_tx_ant & | |
e2ebc833 | 2402 | ~il4965_first_antenna(priv->hw_params.valid_tx_ant); |
be663ab6 WYG |
2403 | if (!lq_sta->lq.general_params.dual_stream_ant_msk) { |
2404 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
e2ebc833 | 2405 | } else if (il4965_num_of_ant(priv->hw_params.valid_tx_ant) == 2) { |
be663ab6 WYG |
2406 | lq_sta->lq.general_params.dual_stream_ant_msk = |
2407 | priv->hw_params.valid_tx_ant; | |
2408 | } | |
2409 | ||
2410 | /* as default allow aggregation for all tids */ | |
e2ebc833 | 2411 | lq_sta->tx_agg_tid_en = IL_AGG_ALL_TID; |
be663ab6 WYG |
2412 | lq_sta->drv = priv; |
2413 | ||
2414 | /* Set last_txrate_idx to lowest rate */ | |
2415 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2416 | if (sband->band == IEEE80211_BAND_5GHZ) | |
e2ebc833 | 2417 | lq_sta->last_txrate_idx += IL_FIRST_OFDM_RATE; |
be663ab6 WYG |
2418 | lq_sta->is_agg = 0; |
2419 | ||
2420 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2421 | lq_sta->dbg_fixed_rate = 0; | |
2422 | #endif | |
2423 | ||
e2ebc833 | 2424 | il4965_rs_initialize_lq(priv, conf, sta, lq_sta); |
be663ab6 WYG |
2425 | } |
2426 | ||
e2ebc833 SG |
2427 | static void il4965_rs_fill_link_cmd(struct il_priv *priv, |
2428 | struct il_lq_sta *lq_sta, u32 new_rate) | |
be663ab6 | 2429 | { |
e2ebc833 | 2430 | struct il_scale_tbl_info tbl_type; |
be663ab6 WYG |
2431 | int index = 0; |
2432 | int rate_idx; | |
2433 | int repeat_rate = 0; | |
2434 | u8 ant_toggle_cnt = 0; | |
2435 | u8 use_ht_possible = 1; | |
2436 | u8 valid_tx_ant = 0; | |
e2ebc833 | 2437 | struct il_link_quality_cmd *lq_cmd = &lq_sta->lq; |
be663ab6 WYG |
2438 | |
2439 | /* Override starting rate (index 0) if needed for debug purposes */ | |
e2ebc833 | 2440 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
be663ab6 WYG |
2441 | |
2442 | /* Interpret new_rate (rate_n_flags) */ | |
e2ebc833 | 2443 | il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
be663ab6 WYG |
2444 | &tbl_type, &rate_idx); |
2445 | ||
2446 | /* How many times should we repeat the initial rate? */ | |
2447 | if (is_legacy(tbl_type.lq_type)) { | |
2448 | ant_toggle_cnt = 1; | |
e2ebc833 | 2449 | repeat_rate = IL_NUMBER_TRY; |
be663ab6 | 2450 | } else { |
e2ebc833 | 2451 | repeat_rate = IL_HT_NUMBER_TRY; |
be663ab6 WYG |
2452 | } |
2453 | ||
2454 | lq_cmd->general_params.mimo_delimiter = | |
2455 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
2456 | ||
2457 | /* Fill 1st table entry (index 0) */ | |
2458 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); | |
2459 | ||
e2ebc833 | 2460 | if (il4965_num_of_ant(tbl_type.ant_type) == 1) { |
be663ab6 WYG |
2461 | lq_cmd->general_params.single_stream_ant_msk = |
2462 | tbl_type.ant_type; | |
e2ebc833 | 2463 | } else if (il4965_num_of_ant(tbl_type.ant_type) == 2) { |
be663ab6 WYG |
2464 | lq_cmd->general_params.dual_stream_ant_msk = |
2465 | tbl_type.ant_type; | |
2466 | } /* otherwise we don't modify the existing value */ | |
2467 | ||
2468 | index++; | |
2469 | repeat_rate--; | |
2470 | if (priv) | |
2471 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2472 | ||
2473 | /* Fill rest of rate table */ | |
2474 | while (index < LINK_QUAL_MAX_RETRY_NUM) { | |
2475 | /* Repeat initial/next rate. | |
e2ebc833 SG |
2476 | * For legacy IL_NUMBER_TRY == 1, this loop will not execute. |
2477 | * For HT IL_HT_NUMBER_TRY == 3, this executes twice. */ | |
be663ab6 WYG |
2478 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
2479 | if (is_legacy(tbl_type.lq_type)) { | |
2480 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) | |
2481 | ant_toggle_cnt++; | |
2482 | else if (priv && | |
e2ebc833 | 2483 | il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
2484 | &new_rate, &tbl_type)) |
2485 | ant_toggle_cnt = 1; | |
2486 | } | |
2487 | ||
2488 | /* Override next rate if needed for debug purposes */ | |
e2ebc833 | 2489 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
be663ab6 WYG |
2490 | |
2491 | /* Fill next table entry */ | |
2492 | lq_cmd->rs_table[index].rate_n_flags = | |
2493 | cpu_to_le32(new_rate); | |
2494 | repeat_rate--; | |
2495 | index++; | |
2496 | } | |
2497 | ||
e2ebc833 | 2498 | il4965_rs_get_tbl_info_from_mcs(new_rate, |
be663ab6 WYG |
2499 | lq_sta->band, &tbl_type, |
2500 | &rate_idx); | |
2501 | ||
2502 | /* Indicate to uCode which entries might be MIMO. | |
2503 | * If initial rate was MIMO, this will finally end up | |
e2ebc833 | 2504 | * as (IL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ |
be663ab6 WYG |
2505 | if (is_mimo(tbl_type.lq_type)) |
2506 | lq_cmd->general_params.mimo_delimiter = index; | |
2507 | ||
2508 | /* Get next rate */ | |
e2ebc833 | 2509 | new_rate = il4965_rs_get_lower_rate(lq_sta, |
be663ab6 WYG |
2510 | &tbl_type, rate_idx, |
2511 | use_ht_possible); | |
2512 | ||
2513 | /* How many times should we repeat the next rate? */ | |
2514 | if (is_legacy(tbl_type.lq_type)) { | |
2515 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) | |
2516 | ant_toggle_cnt++; | |
2517 | else if (priv && | |
e2ebc833 | 2518 | il4965_rs_toggle_antenna(valid_tx_ant, |
be663ab6 WYG |
2519 | &new_rate, &tbl_type)) |
2520 | ant_toggle_cnt = 1; | |
2521 | ||
e2ebc833 | 2522 | repeat_rate = IL_NUMBER_TRY; |
be663ab6 | 2523 | } else { |
e2ebc833 | 2524 | repeat_rate = IL_HT_NUMBER_TRY; |
be663ab6 WYG |
2525 | } |
2526 | ||
2527 | /* Don't allow HT rates after next pass. | |
e2ebc833 | 2528 | * il4965_rs_get_lower_rate() will change type to LQ_A or LQ_G. */ |
be663ab6 WYG |
2529 | use_ht_possible = 0; |
2530 | ||
2531 | /* Override next rate if needed for debug purposes */ | |
e2ebc833 | 2532 | il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
be663ab6 WYG |
2533 | |
2534 | /* Fill next table entry */ | |
2535 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); | |
2536 | ||
2537 | index++; | |
2538 | repeat_rate--; | |
2539 | } | |
2540 | ||
2541 | lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
2542 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; | |
2543 | ||
2544 | lq_cmd->agg_params.agg_time_limit = | |
2545 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
2546 | } | |
2547 | ||
2548 | static void | |
e2ebc833 | 2549 | *il4965_rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
be663ab6 WYG |
2550 | { |
2551 | return hw->priv; | |
2552 | } | |
2553 | /* rate scale requires free function to be implemented */ | |
e2ebc833 | 2554 | static void il4965_rs_free(void *priv_rate) |
be663ab6 WYG |
2555 | { |
2556 | return; | |
2557 | } | |
2558 | ||
e2ebc833 | 2559 | static void il4965_rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
be663ab6 WYG |
2560 | void *priv_sta) |
2561 | { | |
e2ebc833 | 2562 | struct il_priv *priv __maybe_unused = priv_r; |
be663ab6 | 2563 | |
e2ebc833 SG |
2564 | IL_DEBUG_RATE(priv, "enter\n"); |
2565 | IL_DEBUG_RATE(priv, "leave\n"); | |
be663ab6 WYG |
2566 | } |
2567 | ||
2568 | ||
2569 | #ifdef CONFIG_MAC80211_DEBUGFS | |
e2ebc833 | 2570 | static int il4965_open_file_generic(struct inode *inode, struct file *file) |
be663ab6 WYG |
2571 | { |
2572 | file->private_data = inode->i_private; | |
2573 | return 0; | |
2574 | } | |
e2ebc833 | 2575 | static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, |
be663ab6 WYG |
2576 | u32 *rate_n_flags, int index) |
2577 | { | |
e2ebc833 | 2578 | struct il_priv *priv; |
be663ab6 WYG |
2579 | u8 valid_tx_ant; |
2580 | u8 ant_sel_tx; | |
2581 | ||
2582 | priv = lq_sta->drv; | |
2583 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2584 | if (lq_sta->dbg_fixed_rate) { | |
2585 | ant_sel_tx = | |
2586 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
2587 | >> RATE_MCS_ANT_POS); | |
2588 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
2589 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
e2ebc833 | 2590 | IL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
be663ab6 WYG |
2591 | } else { |
2592 | lq_sta->dbg_fixed_rate = 0; | |
e2ebc833 | 2593 | IL_ERR(priv, |
be663ab6 WYG |
2594 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", |
2595 | ant_sel_tx, valid_tx_ant); | |
e2ebc833 | 2596 | IL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
be663ab6 WYG |
2597 | } |
2598 | } else { | |
e2ebc833 | 2599 | IL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
be663ab6 WYG |
2600 | } |
2601 | } | |
2602 | ||
e2ebc833 | 2603 | static ssize_t il4965_rs_sta_dbgfs_scale_table_write(struct file *file, |
be663ab6 WYG |
2604 | const char __user *user_buf, size_t count, loff_t *ppos) |
2605 | { | |
e2ebc833 SG |
2606 | struct il_lq_sta *lq_sta = file->private_data; |
2607 | struct il_priv *priv; | |
be663ab6 | 2608 | char buf[64]; |
8220ba3e | 2609 | size_t buf_size; |
be663ab6 | 2610 | u32 parsed_rate; |
e2ebc833 SG |
2611 | struct il_station_priv *sta_priv = |
2612 | container_of(lq_sta, struct il_station_priv, lq_sta); | |
2613 | struct il_rxon_context *ctx = sta_priv->common.ctx; | |
be663ab6 WYG |
2614 | |
2615 | priv = lq_sta->drv; | |
2616 | memset(buf, 0, sizeof(buf)); | |
2617 | buf_size = min(count, sizeof(buf) - 1); | |
2618 | if (copy_from_user(buf, user_buf, buf_size)) | |
2619 | return -EFAULT; | |
2620 | ||
2621 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
2622 | lq_sta->dbg_fixed_rate = parsed_rate; | |
2623 | else | |
2624 | lq_sta->dbg_fixed_rate = 0; | |
2625 | ||
2626 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
2627 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2628 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2629 | ||
e2ebc833 | 2630 | IL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
be663ab6 WYG |
2631 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
2632 | ||
2633 | if (lq_sta->dbg_fixed_rate) { | |
e2ebc833 SG |
2634 | il4965_rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
2635 | il_send_lq_cmd(lq_sta->drv, ctx, &lq_sta->lq, CMD_ASYNC, | |
be663ab6 WYG |
2636 | false); |
2637 | } | |
2638 | ||
2639 | return count; | |
2640 | } | |
2641 | ||
e2ebc833 | 2642 | static ssize_t il4965_rs_sta_dbgfs_scale_table_read(struct file *file, |
be663ab6 WYG |
2643 | char __user *user_buf, size_t count, loff_t *ppos) |
2644 | { | |
2645 | char *buff; | |
2646 | int desc = 0; | |
2647 | int i = 0; | |
2648 | int index = 0; | |
2649 | ssize_t ret; | |
2650 | ||
e2ebc833 SG |
2651 | struct il_lq_sta *lq_sta = file->private_data; |
2652 | struct il_priv *priv; | |
2653 | struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
be663ab6 WYG |
2654 | |
2655 | priv = lq_sta->drv; | |
2656 | buff = kmalloc(1024, GFP_KERNEL); | |
2657 | if (!buff) | |
2658 | return -ENOMEM; | |
2659 | ||
2660 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); | |
2661 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", | |
2662 | lq_sta->total_failed, lq_sta->total_success, | |
2663 | lq_sta->active_legacy_rate); | |
2664 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", | |
2665 | lq_sta->dbg_fixed_rate); | |
2666 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", | |
2667 | (priv->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", | |
2668 | (priv->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2669 | (priv->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
2670 | desc += sprintf(buff+desc, "lq type %s\n", | |
2671 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
2672 | if (is_Ht(tbl->lq_type)) { | |
2673 | desc += sprintf(buff+desc, " %s", | |
2674 | (is_siso(tbl->lq_type)) ? "SISO" : "MIMO2"); | |
2675 | desc += sprintf(buff+desc, " %s", | |
2676 | (tbl->is_ht40) ? "40MHz" : "20MHz"); | |
2677 | desc += sprintf(buff+desc, " %s %s %s\n", | |
2678 | (tbl->is_SGI) ? "SGI" : "", | |
2679 | (lq_sta->is_green) ? "GF enabled" : "", | |
2680 | (lq_sta->is_agg) ? "AGG on" : ""); | |
2681 | } | |
2682 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", | |
2683 | lq_sta->last_rate_n_flags); | |
2684 | desc += sprintf(buff+desc, "general:" | |
2685 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
2686 | lq_sta->lq.general_params.flags, | |
2687 | lq_sta->lq.general_params.mimo_delimiter, | |
2688 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2689 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
2690 | ||
2691 | desc += sprintf(buff+desc, "agg:" | |
2692 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2693 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), | |
2694 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2695 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
2696 | ||
2697 | desc += sprintf(buff+desc, | |
2698 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2699 | lq_sta->lq.general_params.start_rate_index[0], | |
2700 | lq_sta->lq.general_params.start_rate_index[1], | |
2701 | lq_sta->lq.general_params.start_rate_index[2], | |
2702 | lq_sta->lq.general_params.start_rate_index[3]); | |
2703 | ||
2704 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
e2ebc833 | 2705 | index = il4965_hwrate_to_plcp_idx( |
be663ab6 WYG |
2706 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
2707 | if (is_legacy(tbl->lq_type)) { | |
2708 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
2709 | i, | |
2710 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
e2ebc833 | 2711 | il_rate_mcs[index].mbps); |
be663ab6 WYG |
2712 | } else { |
2713 | desc += sprintf(buff+desc, | |
2714 | " rate[%d] 0x%X %smbps (%s)\n", | |
2715 | i, | |
2716 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
e2ebc833 | 2717 | il_rate_mcs[index].mbps, il_rate_mcs[index].mcs); |
be663ab6 WYG |
2718 | } |
2719 | } | |
2720 | ||
2721 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2722 | kfree(buff); | |
2723 | return ret; | |
2724 | } | |
2725 | ||
2726 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
e2ebc833 SG |
2727 | .write = il4965_rs_sta_dbgfs_scale_table_write, |
2728 | .read = il4965_rs_sta_dbgfs_scale_table_read, | |
2729 | .open = il4965_open_file_generic, | |
be663ab6 WYG |
2730 | .llseek = default_llseek, |
2731 | }; | |
e2ebc833 | 2732 | static ssize_t il4965_rs_sta_dbgfs_stats_table_read(struct file *file, |
be663ab6 WYG |
2733 | char __user *user_buf, size_t count, loff_t *ppos) |
2734 | { | |
2735 | char *buff; | |
2736 | int desc = 0; | |
2737 | int i, j; | |
2738 | ssize_t ret; | |
2739 | ||
e2ebc833 | 2740 | struct il_lq_sta *lq_sta = file->private_data; |
be663ab6 WYG |
2741 | |
2742 | buff = kmalloc(1024, GFP_KERNEL); | |
2743 | if (!buff) | |
2744 | return -ENOMEM; | |
2745 | ||
2746 | for (i = 0; i < LQ_SIZE; i++) { | |
2747 | desc += sprintf(buff+desc, | |
2748 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
2749 | "rate=0x%X\n", | |
2750 | lq_sta->active_tbl == i ? "*" : "x", | |
2751 | lq_sta->lq_info[i].lq_type, | |
2752 | lq_sta->lq_info[i].is_SGI, | |
2753 | lq_sta->lq_info[i].is_ht40, | |
2754 | lq_sta->lq_info[i].is_dup, | |
2755 | lq_sta->is_green, | |
2756 | lq_sta->lq_info[i].current_rate); | |
e2ebc833 | 2757 | for (j = 0; j < IL_RATE_COUNT; j++) { |
be663ab6 WYG |
2758 | desc += sprintf(buff+desc, |
2759 | "counter=%d success=%d %%=%d\n", | |
2760 | lq_sta->lq_info[i].win[j].counter, | |
2761 | lq_sta->lq_info[i].win[j].success_counter, | |
2762 | lq_sta->lq_info[i].win[j].success_ratio); | |
2763 | } | |
2764 | } | |
2765 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2766 | kfree(buff); | |
2767 | return ret; | |
2768 | } | |
2769 | ||
2770 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
e2ebc833 SG |
2771 | .read = il4965_rs_sta_dbgfs_stats_table_read, |
2772 | .open = il4965_open_file_generic, | |
be663ab6 WYG |
2773 | .llseek = default_llseek, |
2774 | }; | |
2775 | ||
e2ebc833 | 2776 | static ssize_t il4965_rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
be663ab6 WYG |
2777 | char __user *user_buf, size_t count, loff_t *ppos) |
2778 | { | |
2779 | char buff[120]; | |
2780 | int desc = 0; | |
2781 | ssize_t ret; | |
2782 | ||
e2ebc833 SG |
2783 | struct il_lq_sta *lq_sta = file->private_data; |
2784 | struct il_priv *priv; | |
2785 | struct il_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; | |
be663ab6 WYG |
2786 | |
2787 | priv = lq_sta->drv; | |
2788 | ||
2789 | if (is_Ht(tbl->lq_type)) | |
2790 | desc += sprintf(buff+desc, | |
2791 | "Bit Rate= %d Mb/s\n", | |
2792 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
2793 | else | |
2794 | desc += sprintf(buff+desc, | |
2795 | "Bit Rate= %d Mb/s\n", | |
ef33417d | 2796 | iwlegacy_rates[lq_sta->last_txrate_idx].ieee >> 1); |
be663ab6 WYG |
2797 | |
2798 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2799 | return ret; | |
2800 | } | |
2801 | ||
2802 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
e2ebc833 SG |
2803 | .read = il4965_rs_sta_dbgfs_rate_scale_data_read, |
2804 | .open = il4965_open_file_generic, | |
be663ab6 WYG |
2805 | .llseek = default_llseek, |
2806 | }; | |
2807 | ||
e2ebc833 | 2808 | static void il4965_rs_add_debugfs(void *priv, void *priv_sta, |
be663ab6 WYG |
2809 | struct dentry *dir) |
2810 | { | |
e2ebc833 | 2811 | struct il_lq_sta *lq_sta = priv_sta; |
be663ab6 WYG |
2812 | lq_sta->rs_sta_dbgfs_scale_table_file = |
2813 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, | |
2814 | lq_sta, &rs_sta_dbgfs_scale_table_ops); | |
2815 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
2816 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, | |
2817 | lq_sta, &rs_sta_dbgfs_stats_table_ops); | |
2818 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = | |
2819 | debugfs_create_file("rate_scale_data", S_IRUSR, dir, | |
2820 | lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); | |
2821 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = | |
2822 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, | |
2823 | &lq_sta->tx_agg_tid_en); | |
2824 | ||
2825 | } | |
2826 | ||
e2ebc833 | 2827 | static void il4965_rs_remove_debugfs(void *priv, void *priv_sta) |
be663ab6 | 2828 | { |
e2ebc833 | 2829 | struct il_lq_sta *lq_sta = priv_sta; |
be663ab6 WYG |
2830 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2831 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
2832 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); | |
2833 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); | |
2834 | } | |
2835 | #endif | |
2836 | ||
2837 | /* | |
2838 | * Initialization of rate scaling information is done by driver after | |
2839 | * the station is added. Since mac80211 calls this function before a | |
2840 | * station is added we ignore it. | |
2841 | */ | |
2842 | static void | |
e2ebc833 | 2843 | il4965_rs_rate_init_stub(void *priv_r, struct ieee80211_supported_band *sband, |
be663ab6 WYG |
2844 | struct ieee80211_sta *sta, void *priv_sta) |
2845 | { | |
2846 | } | |
2847 | static struct rate_control_ops rs_4965_ops = { | |
2848 | .module = NULL, | |
2849 | .name = IWL4965_RS_NAME, | |
e2ebc833 SG |
2850 | .tx_status = il4965_rs_tx_status, |
2851 | .get_rate = il4965_rs_get_rate, | |
2852 | .rate_init = il4965_rs_rate_init_stub, | |
2853 | .alloc = il4965_rs_alloc, | |
2854 | .free = il4965_rs_free, | |
2855 | .alloc_sta = il4965_rs_alloc_sta, | |
2856 | .free_sta = il4965_rs_free_sta, | |
be663ab6 | 2857 | #ifdef CONFIG_MAC80211_DEBUGFS |
e2ebc833 SG |
2858 | .add_sta_debugfs = il4965_rs_add_debugfs, |
2859 | .remove_sta_debugfs = il4965_rs_remove_debugfs, | |
be663ab6 WYG |
2860 | #endif |
2861 | }; | |
2862 | ||
e2ebc833 | 2863 | int il4965_rate_control_register(void) |
be663ab6 | 2864 | { |
be663ab6 WYG |
2865 | return ieee80211_rate_control_register(&rs_4965_ops); |
2866 | } | |
2867 | ||
e2ebc833 | 2868 | void il4965_rate_control_unregister(void) |
be663ab6 WYG |
2869 | { |
2870 | ieee80211_rate_control_unregister(&rs_4965_ops); | |
2871 | } |