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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
fb4961db | 3 | * Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved. |
b481de9c ZY |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
759ef89f | 22 | * Intel Linux Wireless <ilw@linux.intel.com> |
b481de9c ZY |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/skbuff.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
b481de9c | 30 | #include <net/mac80211.h> |
b481de9c ZY |
31 | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
3e0d4cb1 | 38 | #include "iwl-dev.h" |
857485c0 | 39 | #include "iwl-core.h" |
a30e3112 | 40 | #include "iwl-agn.h" |
d0f76d68 | 41 | #include "iwl-op-mode.h" |
b481de9c | 42 | |
e227ceac | 43 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 44 | |
aade00ce | 45 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
46 | #define IWL_NUMBER_TRY 1 |
47 | #define IWL_HT_NUMBER_TRY 3 | |
48 | ||
77626355 BC |
49 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
50 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
51 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
52 | ||
7d049e5a AM |
53 | /* max allowed rate miss before sync LQ cmd */ |
54 | #define IWL_MISSED_RATE_MAX 15 | |
77626355 | 55 | /* max time to accum history 2 seconds */ |
447fee70 | 56 | #define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ) |
b481de9c ZY |
57 | |
58 | static u8 rs_ht_to_legacy[] = { | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, | |
62 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
63 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
64 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
65 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
66 | }; | |
67 | ||
aade00ce GC |
68 | static const u8 ant_toggle_lookup[] = { |
69 | /*ANT_NONE -> */ ANT_NONE, | |
70 | /*ANT_A -> */ ANT_B, | |
71 | /*ANT_B -> */ ANT_C, | |
72 | /*ANT_AB -> */ ANT_BC, | |
73 | /*ANT_C -> */ ANT_A, | |
74 | /*ANT_AC -> */ ANT_AB, | |
75 | /*ANT_BC -> */ ANT_AC, | |
76 | /*ANT_ABC -> */ ANT_ABC, | |
77 | }; | |
78 | ||
635b85b4 JB |
79 | #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ |
80 | [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ | |
81 | IWL_RATE_SISO_##s##M_PLCP, \ | |
82 | IWL_RATE_MIMO2_##s##M_PLCP,\ | |
83 | IWL_RATE_MIMO3_##s##M_PLCP,\ | |
84 | IWL_RATE_##r##M_IEEE, \ | |
85 | IWL_RATE_##ip##M_INDEX, \ | |
86 | IWL_RATE_##in##M_INDEX, \ | |
87 | IWL_RATE_##rp##M_INDEX, \ | |
88 | IWL_RATE_##rn##M_INDEX, \ | |
89 | IWL_RATE_##pp##M_INDEX, \ | |
90 | IWL_RATE_##np##M_INDEX } | |
91 | ||
92 | /* | |
93 | * Parameter order: | |
94 | * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate | |
95 | * | |
96 | * If there isn't a valid next or previous rate then INV is used which | |
97 | * maps to IWL_RATE_INVALID | |
98 | * | |
99 | */ | |
100 | const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = { | |
101 | IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ | |
102 | IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ | |
103 | IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ | |
104 | IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ | |
105 | IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ | |
106 | IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ | |
107 | IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ | |
108 | IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ | |
109 | IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ | |
110 | IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ | |
111 | IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ | |
112 | IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ | |
113 | IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ | |
114 | /* FIXME:RS: ^^ should be INV (legacy) */ | |
115 | }; | |
116 | ||
2520546a DH |
117 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
118 | { | |
119 | return (u8)(rate_n_flags & RATE_MCS_RATE_MSK); | |
120 | } | |
121 | ||
635b85b4 JB |
122 | static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) |
123 | { | |
124 | int idx = 0; | |
125 | ||
126 | /* HT rate format */ | |
127 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
2520546a | 128 | idx = rs_extract_rate(rate_n_flags); |
635b85b4 JB |
129 | |
130 | if (idx >= IWL_RATE_MIMO3_6M_PLCP) | |
131 | idx = idx - IWL_RATE_MIMO3_6M_PLCP; | |
132 | else if (idx >= IWL_RATE_MIMO2_6M_PLCP) | |
133 | idx = idx - IWL_RATE_MIMO2_6M_PLCP; | |
134 | ||
135 | idx += IWL_FIRST_OFDM_RATE; | |
136 | /* skip 9M not supported in ht*/ | |
137 | if (idx >= IWL_RATE_9M_INDEX) | |
138 | idx += 1; | |
139 | if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE)) | |
140 | return idx; | |
141 | ||
142 | /* legacy rate format, search for match in table */ | |
143 | } else { | |
144 | for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) | |
2520546a DH |
145 | if (iwl_rates[idx].plcp == |
146 | rs_extract_rate(rate_n_flags)) | |
635b85b4 JB |
147 | return idx; |
148 | } | |
149 | ||
150 | return -1; | |
151 | } | |
152 | ||
c79dd5b5 | 153 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 154 | struct sk_buff *skb, |
4b7679a5 JB |
155 | struct ieee80211_sta *sta, |
156 | struct iwl_lq_sta *lq_sta); | |
46f9381a | 157 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 158 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
da5dbb97 | 159 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); |
b481de9c ZY |
160 | |
161 | ||
98d7e09a | 162 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
163 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
164 | u32 *rate_n_flags, int index); | |
98d7e09a | 165 | #else |
e227ceac TW |
166 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
167 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
168 | {} |
169 | #endif | |
77626355 | 170 | |
e3949d62 DH |
171 | /** |
172 | * The following tables contain the expected throughput metrics for all rates | |
173 | * | |
174 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
175 | * | |
176 | * where invalid entries are zeros. | |
177 | * | |
178 | * CCK rates are only valid in legacy table and will only be used in G | |
179 | * (2.4 GHz) band. | |
77626355 | 180 | */ |
584a0f00 | 181 | |
e3949d62 DH |
182 | static s32 expected_tpt_legacy[IWL_RATE_COUNT] = { |
183 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 | |
b481de9c ZY |
184 | }; |
185 | ||
e3949d62 | 186 | static s32 expected_tpt_siso20MHz[4][IWL_RATE_COUNT] = { |
7fc11e9b WYG |
187 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202}, /* Norm */ |
188 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210}, /* SGI */ | |
189 | {0, 0, 0, 0, 47, 0, 91, 133, 171, 242, 305, 334, 362}, /* AGG */ | |
190 | {0, 0, 0, 0, 52, 0, 101, 145, 187, 264, 330, 361, 390}, /* AGG+SGI */ | |
b481de9c ZY |
191 | }; |
192 | ||
e3949d62 DH |
193 | static s32 expected_tpt_siso40MHz[4][IWL_RATE_COUNT] = { |
194 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ | |
195 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ | |
7fc11e9b WYG |
196 | {0, 0, 0, 0, 94, 0, 177, 249, 313, 423, 512, 550, 586}, /* AGG */ |
197 | {0, 0, 0, 0, 104, 0, 193, 270, 338, 454, 545, 584, 620}, /* AGG+SGI */ | |
b481de9c ZY |
198 | }; |
199 | ||
e3949d62 | 200 | static s32 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
7fc11e9b WYG |
201 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 214, 236, 244, 251}, /* Norm */ |
202 | {0, 0, 0, 0, 81, 0, 131, 164, 188, 223, 243, 251, 257}, /* SGI */ | |
203 | {0, 0, 0, 0, 89, 0, 167, 235, 296, 402, 488, 526, 560}, /* AGG */ | |
204 | {0, 0, 0, 0, 97, 0, 182, 255, 320, 431, 520, 558, 593}, /* AGG+SGI*/ | |
b481de9c ZY |
205 | }; |
206 | ||
e3949d62 DH |
207 | static s32 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
208 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ | |
209 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ | |
7fc11e9b WYG |
210 | {0, 0, 0, 0, 171, 0, 305, 410, 496, 634, 731, 771, 805}, /* AGG */ |
211 | {0, 0, 0, 0, 186, 0, 329, 439, 527, 667, 764, 803, 838}, /* AGG+SGI */ | |
b481de9c ZY |
212 | }; |
213 | ||
e3949d62 DH |
214 | static s32 expected_tpt_mimo3_20MHz[4][IWL_RATE_COUNT] = { |
215 | {0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268}, /* Norm */ | |
216 | {0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273}, /* SGI */ | |
217 | {0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775}, /* AGG */ | |
218 | {0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818}, /* AGG+SGI */ | |
584a0f00 WYG |
219 | }; |
220 | ||
e3949d62 DH |
221 | static s32 expected_tpt_mimo3_40MHz[4][IWL_RATE_COUNT] = { |
222 | {0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297}, /* Norm */ | |
223 | {0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300}, /* SGI */ | |
224 | {0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070}, /* AGG */ | |
225 | {0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109}, /* AGG+SGI */ | |
584a0f00 WYG |
226 | }; |
227 | ||
12b96817 | 228 | /* mbps, mcs */ |
79496738 | 229 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { |
e3949d62 DH |
230 | { "1", "BPSK DSSS"}, |
231 | { "2", "QPSK DSSS"}, | |
232 | {"5.5", "BPSK CCK"}, | |
233 | { "11", "QPSK CCK"}, | |
234 | { "6", "BPSK 1/2"}, | |
235 | { "9", "BPSK 1/2"}, | |
236 | { "12", "QPSK 1/2"}, | |
237 | { "18", "QPSK 3/4"}, | |
238 | { "24", "16QAM 1/2"}, | |
239 | { "36", "16QAM 3/4"}, | |
240 | { "48", "64QAM 2/3"}, | |
241 | { "54", "64QAM 3/4"}, | |
242 | { "60", "64QAM 5/6"}, | |
12b96817 WYG |
243 | }; |
244 | ||
a9c146b3 WYG |
245 | #define MCS_INDEX_PER_STREAM (8) |
246 | ||
e227ceac | 247 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
248 | { |
249 | window->data = 0; | |
250 | window->success_counter = 0; | |
251 | window->success_ratio = IWL_INVALID_VALUE; | |
252 | window->counter = 0; | |
253 | window->average_tpt = IWL_INVALID_VALUE; | |
254 | window->stamp = 0; | |
b481de9c ZY |
255 | } |
256 | ||
aade00ce GC |
257 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
258 | { | |
3ac7f146 | 259 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
260 | } |
261 | ||
0c11b4de RR |
262 | /* |
263 | * removes the old data from the statistics. All data that is older than | |
264 | * TID_MAX_TIME_DIFF, will be deleted. | |
265 | */ | |
e227ceac | 266 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
267 | { |
268 | /* The oldest age we want to keep */ | |
269 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
270 | ||
271 | while (tl->queue_count && | |
272 | (tl->time_stamp < oldest_time)) { | |
273 | tl->total -= tl->packet_count[tl->head]; | |
274 | tl->packet_count[tl->head] = 0; | |
275 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
276 | tl->queue_count--; | |
277 | tl->head++; | |
278 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
279 | tl->head = 0; | |
280 | } | |
281 | } | |
282 | ||
283 | /* | |
284 | * increment traffic load value for tid and also remove | |
285 | * any old values if passed the certain time period | |
286 | */ | |
e227ceac | 287 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 288 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
289 | { |
290 | u32 curr_time = jiffies_to_msecs(jiffies); | |
291 | u32 time_diff; | |
292 | s32 index; | |
e227ceac | 293 | struct iwl_traffic_load *tl = NULL; |
54dbb525 | 294 | u8 tid; |
0c11b4de | 295 | |
417f114b | 296 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
fd7c8a40 | 297 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
54dbb525 TW |
298 | tid = qc[0] & 0xf; |
299 | } else | |
5f85a789 | 300 | return IWL_MAX_TID_COUNT; |
0c11b4de | 301 | |
a8448553 | 302 | if (unlikely(tid >= IWL_MAX_TID_COUNT)) |
5f85a789 | 303 | return IWL_MAX_TID_COUNT; |
e6a6cf4c | 304 | |
0c11b4de RR |
305 | tl = &lq_data->load[tid]; |
306 | ||
307 | curr_time -= curr_time % TID_ROUND_VALUE; | |
308 | ||
309 | /* Happens only for the first packet. Initialize the data */ | |
310 | if (!(tl->queue_count)) { | |
311 | tl->total = 1; | |
312 | tl->time_stamp = curr_time; | |
313 | tl->queue_count = 1; | |
314 | tl->head = 0; | |
315 | tl->packet_count[0] = 1; | |
5f85a789 | 316 | return IWL_MAX_TID_COUNT; |
0c11b4de RR |
317 | } |
318 | ||
319 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
320 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
321 | ||
322 | /* The history is too long: remove data that is older than */ | |
323 | /* TID_MAX_TIME_DIFF */ | |
324 | if (index >= TID_QUEUE_MAX_SIZE) | |
325 | rs_tl_rm_old_stats(tl, curr_time); | |
326 | ||
327 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
328 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
329 | tl->total = tl->total + 1; | |
330 | ||
331 | if ((index + 1) > tl->queue_count) | |
332 | tl->queue_count = index + 1; | |
faa29718 RR |
333 | |
334 | return tid; | |
0c11b4de RR |
335 | } |
336 | ||
54a430c0 | 337 | #ifdef CONFIG_MAC80211_DEBUGFS |
4e308119 WYG |
338 | /** |
339 | * Program the device to use fixed rate for frame transmit | |
340 | * This is for debugging/testing only | |
341 | * once the device start use fixed rate, we need to reload the module | |
342 | * to being back the normal operation. | |
343 | */ | |
6489854b WYG |
344 | static void rs_program_fix_rate(struct iwl_priv *priv, |
345 | struct iwl_lq_sta *lq_sta) | |
346 | { | |
347 | struct iwl_station_priv *sta_priv = | |
348 | container_of(lq_sta, struct iwl_station_priv, lq_sta); | |
c6892906 | 349 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
6489854b WYG |
350 | |
351 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
352 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
353 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
354 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
355 | ||
5ef15ccc | 356 | #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE |
4e308119 WYG |
357 | /* testmode has higher priority to overwirte the fixed rate */ |
358 | if (priv->tm_fixed_rate) | |
359 | lq_sta->dbg_fixed_rate = priv->tm_fixed_rate; | |
c10e2c10 | 360 | #endif |
6489854b WYG |
361 | |
362 | IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", | |
4e308119 | 363 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
6489854b | 364 | |
4e308119 WYG |
365 | if (lq_sta->dbg_fixed_rate) { |
366 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); | |
6489854b WYG |
367 | iwl_send_lq_cmd(lq_sta->drv, ctx, &lq_sta->lq, CMD_ASYNC, |
368 | false); | |
369 | } | |
370 | } | |
371 | #endif | |
372 | ||
0c11b4de RR |
373 | /* |
374 | get the traffic load value for tid | |
375 | */ | |
e227ceac | 376 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
377 | { |
378 | u32 curr_time = jiffies_to_msecs(jiffies); | |
379 | u32 time_diff; | |
380 | s32 index; | |
e227ceac | 381 | struct iwl_traffic_load *tl = NULL; |
0c11b4de | 382 | |
a8448553 | 383 | if (tid >= IWL_MAX_TID_COUNT) |
0c11b4de RR |
384 | return 0; |
385 | ||
386 | tl = &(lq_data->load[tid]); | |
387 | ||
388 | curr_time -= curr_time % TID_ROUND_VALUE; | |
389 | ||
390 | if (!(tl->queue_count)) | |
391 | return 0; | |
392 | ||
393 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
394 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
395 | ||
396 | /* The history is too long: remove data that is older than */ | |
397 | /* TID_MAX_TIME_DIFF */ | |
398 | if (index >= TID_QUEUE_MAX_SIZE) | |
399 | rs_tl_rm_old_stats(tl, curr_time); | |
400 | ||
401 | return tl->total; | |
402 | } | |
403 | ||
82ca9341 | 404 | static int rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 405 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 406 | struct ieee80211_sta *sta) |
0c11b4de | 407 | { |
82ca9341 | 408 | int ret = -EAGAIN; |
290f599c JB |
409 | u32 load; |
410 | ||
411 | /* | |
412 | * Don't create TX aggregation sessions when in high | |
413 | * BT traffic, as they would just be disrupted by BT. | |
414 | */ | |
415 | if (priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) { | |
416 | IWL_ERR(priv, "BT traffic (%d), no aggregation allowed\n", | |
417 | priv->bt_traffic_load); | |
418 | return ret; | |
419 | } | |
420 | ||
421 | load = rs_tl_get_load(lq_data, tid); | |
45d42700 | 422 | |
dd5b6d0a | 423 | if ((iwlagn_mod_params.auto_agg) || (load > IWL_AGG_LOAD_THRESHOLD)) { |
e1623446 | 424 | IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
e174961c | 425 | sta->addr, tid); |
bd2ce6e4 | 426 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); |
45d42700 WYG |
427 | if (ret == -EAGAIN) { |
428 | /* | |
429 | * driver and mac80211 is out of sync | |
430 | * this might be cause by reloading firmware | |
431 | * stop the tx ba session here | |
432 | */ | |
2411054a | 433 | IWL_ERR(priv, "Fail start Tx agg on tid: %d\n", |
45d42700 | 434 | tid); |
6a8579d0 | 435 | ieee80211_stop_tx_ba_session(sta, tid); |
45d42700 | 436 | } |
2411054a | 437 | } else { |
5f88ac2d | 438 | IWL_DEBUG_HT(priv, "Aggregation not enabled for tid %d " |
2411054a AL |
439 | "because load = %u\n", tid, load); |
440 | } | |
82ca9341 | 441 | return ret; |
0c11b4de RR |
442 | } |
443 | ||
c79dd5b5 | 444 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 445 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 446 | struct ieee80211_sta *sta) |
0c11b4de | 447 | { |
a8448553 | 448 | if (tid < IWL_MAX_TID_COUNT) |
cfecc6b4 WYG |
449 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); |
450 | else | |
a8448553 JB |
451 | IWL_ERR(priv, "tid exceeds max TID count: %d/%d\n", |
452 | tid, IWL_MAX_TID_COUNT); | |
0c11b4de RR |
453 | } |
454 | ||
39e88504 | 455 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 456 | { |
3ac7f146 TW |
457 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
458 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
459 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
460 | } |
461 | ||
04f2dec1 SZ |
462 | /* |
463 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
464 | * that wraps a NULL pointer check | |
465 | */ | |
466 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
467 | { | |
468 | if (tbl->expected_tpt) | |
469 | return tbl->expected_tpt[rs_index]; | |
470 | return 0; | |
471 | } | |
472 | ||
77626355 BC |
473 | /** |
474 | * rs_collect_tx_data - Update the success/failure sliding window | |
475 | * | |
476 | * We keep a sliding window of the last 62 packets transmitted | |
477 | * at this rate. window->data contains the bitmask of successful | |
478 | * packets. | |
479 | */ | |
04f2dec1 SZ |
480 | static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl, |
481 | int scale_index, int attempts, int successes) | |
b481de9c | 482 | { |
e227ceac | 483 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 484 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
04f2dec1 | 485 | s32 fail_count, tpt; |
b481de9c | 486 | |
dc2453ae TW |
487 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
488 | return -EINVAL; | |
b481de9c | 489 | |
e3949d62 | 490 | /* Select window for current tx bit rate */ |
04f2dec1 SZ |
491 | window = &(tbl->win[scale_index]); |
492 | ||
493 | /* Get expected throughput */ | |
494 | tpt = get_expected_tpt(tbl, scale_index); | |
b481de9c | 495 | |
77626355 BC |
496 | /* |
497 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
498 | * history window; anything older isn't really relevant any more. | |
499 | * If we have filled up the sliding window, drop the oldest attempt; | |
500 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
501 | * subtract "1" from the success counter (this is the main reason | |
502 | * we keep these bitmaps!). | |
503 | */ | |
e3949d62 | 504 | while (attempts > 0) { |
39e88504 GC |
505 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
506 | ||
507 | /* remove earliest */ | |
508 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
509 | ||
99556438 RR |
510 | if (window->data & mask) { |
511 | window->data &= ~mask; | |
39e88504 | 512 | window->success_counter--; |
99556438 | 513 | } |
b481de9c | 514 | } |
b481de9c | 515 | |
99556438 RR |
516 | /* Increment frames-attempted counter */ |
517 | window->counter++; | |
518 | ||
e3949d62 | 519 | /* Shift bitmap by one frame to throw away oldest history */ |
90d7795e | 520 | window->data <<= 1; |
e3949d62 DH |
521 | |
522 | /* Mark the most recent #successes attempts as successful */ | |
99556438 | 523 | if (successes > 0) { |
39e88504 | 524 | window->success_counter++; |
99556438 RR |
525 | window->data |= 0x1; |
526 | successes--; | |
527 | } | |
77626355 | 528 | |
e3949d62 | 529 | attempts--; |
b481de9c ZY |
530 | } |
531 | ||
77626355 | 532 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
533 | if (window->counter > 0) |
534 | window->success_ratio = 128 * (100 * window->success_counter) | |
535 | / window->counter; | |
536 | else | |
537 | window->success_ratio = IWL_INVALID_VALUE; | |
538 | ||
539 | fail_count = window->counter - window->success_counter; | |
540 | ||
77626355 | 541 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
542 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
543 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
544 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
545 | else | |
546 | window->average_tpt = IWL_INVALID_VALUE; | |
547 | ||
77626355 | 548 | /* Tag this window as having been updated */ |
b481de9c ZY |
549 | window->stamp = jiffies; |
550 | ||
dc2453ae | 551 | return 0; |
b481de9c ZY |
552 | } |
553 | ||
77626355 BC |
554 | /* |
555 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
556 | */ | |
39e88504 | 557 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
558 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
559 | struct iwl_scale_tbl_info *tbl, | |
560 | int index, u8 use_green) | |
b481de9c | 561 | { |
39e88504 GC |
562 | u32 rate_n_flags = 0; |
563 | ||
b481de9c | 564 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 565 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 566 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 567 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 568 | |
fde0db31 GC |
569 | } else if (is_Ht(tbl->lq_type)) { |
570 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 571 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 572 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 573 | } |
39e88504 | 574 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
575 | |
576 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 577 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 578 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 579 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 580 | else |
1826dcc0 | 581 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 582 | } else { |
978785a3 | 583 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
584 | } |
585 | ||
39e88504 | 586 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 587 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 588 | |
39e88504 | 589 | if (is_Ht(tbl->lq_type)) { |
7aafef1c | 590 | if (tbl->is_ht40) { |
39e88504 GC |
591 | if (tbl->is_dup) |
592 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
593 | else | |
7aafef1c | 594 | rate_n_flags |= RATE_MCS_HT40_MSK; |
39e88504 GC |
595 | } |
596 | if (tbl->is_SGI) | |
597 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
598 | ||
599 | if (use_green) { | |
600 | rate_n_flags |= RATE_MCS_GF_MSK; | |
601 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
602 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 603 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
604 | } |
605 | } | |
b481de9c | 606 | } |
39e88504 | 607 | return rate_n_flags; |
b481de9c ZY |
608 | } |
609 | ||
77626355 BC |
610 | /* |
611 | * Interpret uCode API's rate_n_flags format, | |
612 | * fill "search" or "active" tx mode table. | |
613 | */ | |
39e88504 | 614 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 615 | enum ieee80211_band band, |
e227ceac | 616 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
617 | int *rate_idx) |
618 | { | |
39e88504 GC |
619 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
620 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
621 | u8 mcs; | |
b481de9c | 622 | |
80e9158c | 623 | memset(tbl, 0, sizeof(struct iwl_scale_tbl_info)); |
e7d326ac | 624 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 625 | |
fde0db31 | 626 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 627 | *rate_idx = -1; |
dc2453ae | 628 | return -EINVAL; |
b481de9c | 629 | } |
77626355 | 630 | tbl->is_SGI = 0; /* default legacy setup */ |
7aafef1c | 631 | tbl->is_ht40 = 0; |
b481de9c | 632 | tbl->is_dup = 0; |
fde0db31 GC |
633 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
634 | tbl->lq_type = LQ_NONE; | |
d6e93399 | 635 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c | 636 | |
77626355 | 637 | /* legacy rate format */ |
39e88504 | 638 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 639 | if (num_of_ant == 1) { |
8318d78a | 640 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
641 | tbl->lq_type = LQ_A; |
642 | else | |
643 | tbl->lq_type = LQ_G; | |
b481de9c | 644 | } |
fde0db31 | 645 | /* HT rate format */ |
b481de9c | 646 | } else { |
39e88504 | 647 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
648 | tbl->is_SGI = 1; |
649 | ||
7aafef1c | 650 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || |
39e88504 | 651 | (rate_n_flags & RATE_MCS_DUP_MSK)) |
7aafef1c | 652 | tbl->is_ht40 = 1; |
b481de9c | 653 | |
39e88504 | 654 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 655 | tbl->is_dup = 1; |
fde0db31 | 656 | |
39e88504 | 657 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 658 | |
39e88504 GC |
659 | /* SISO */ |
660 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
661 | if (num_of_ant == 1) |
662 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
663 | /* MIMO2 */ | |
39e88504 | 664 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
665 | if (num_of_ant == 2) |
666 | tbl->lq_type = LQ_MIMO2; | |
667 | /* MIMO3 */ | |
668 | } else { | |
d6e93399 MA |
669 | if (num_of_ant == 3) { |
670 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; | |
fde0db31 | 671 | tbl->lq_type = LQ_MIMO3; |
d6e93399 | 672 | } |
fde0db31 | 673 | } |
b481de9c ZY |
674 | } |
675 | return 0; | |
676 | } | |
aade00ce GC |
677 | |
678 | /* switch to another antenna/antennas and return 1 */ | |
679 | /* if no other valid antenna found, return 0 */ | |
680 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 681 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 682 | { |
aade00ce GC |
683 | u8 new_ant_type; |
684 | ||
685 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
686 | return 0; | |
687 | ||
688 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
689 | return 0; | |
690 | ||
691 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
692 | ||
693 | while ((new_ant_type != tbl->ant_type) && | |
694 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
695 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
696 | ||
697 | if (new_ant_type == tbl->ant_type) | |
698 | return 0; | |
699 | ||
700 | tbl->ant_type = new_ant_type; | |
701 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
702 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
703 | return 1; | |
b481de9c ZY |
704 | } |
705 | ||
b261793d DH |
706 | /** |
707 | * Green-field mode is valid if the station supports it and | |
708 | * there are no non-GF stations present in the BSS. | |
709 | */ | |
7e6a5886 | 710 | static bool rs_use_green(struct ieee80211_sta *sta) |
b481de9c | 711 | { |
7e6a5886 | 712 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 713 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
7e6a5886 | 714 | |
b261793d | 715 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
7e6a5886 | 716 | !(ctx->ht.non_gf_sta_present); |
b481de9c ZY |
717 | } |
718 | ||
719 | /** | |
720 | * rs_get_supported_rates - get the available rates | |
721 | * | |
722 | * if management frame or broadcast frame only return | |
723 | * basic available rates. | |
724 | * | |
725 | */ | |
e227ceac TW |
726 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
727 | struct ieee80211_hdr *hdr, | |
728 | enum iwl_table_type rate_type) | |
b481de9c | 729 | { |
eecd6e57 GC |
730 | if (is_legacy(rate_type)) { |
731 | return lq_sta->active_legacy_rate; | |
732 | } else { | |
b481de9c | 733 | if (is_siso(rate_type)) |
eecd6e57 | 734 | return lq_sta->active_siso_rate; |
fde0db31 | 735 | else if (is_mimo2(rate_type)) |
eecd6e57 | 736 | return lq_sta->active_mimo2_rate; |
b481de9c | 737 | else |
eecd6e57 | 738 | return lq_sta->active_mimo3_rate; |
c33104f0 | 739 | } |
b481de9c ZY |
740 | } |
741 | ||
bf403db8 EK |
742 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
743 | int rate_type) | |
b481de9c ZY |
744 | { |
745 | u8 high = IWL_RATE_INVALID; | |
746 | u8 low = IWL_RATE_INVALID; | |
747 | ||
01ebd063 | 748 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
749 | * the rate table */ |
750 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
751 | int i; | |
752 | u32 mask; | |
753 | ||
754 | /* Find the previous rate that is in the rate mask */ | |
755 | i = index - 1; | |
756 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
757 | if (rate_mask & mask) { | |
758 | low = i; | |
759 | break; | |
760 | } | |
761 | } | |
762 | ||
763 | /* Find the next rate that is in the rate mask */ | |
764 | i = index + 1; | |
765 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
766 | if (rate_mask & mask) { | |
767 | high = i; | |
768 | break; | |
769 | } | |
770 | } | |
771 | ||
772 | return (high << 8) | low; | |
773 | } | |
774 | ||
775 | low = index; | |
776 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 777 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
778 | if (low == IWL_RATE_INVALID) |
779 | break; | |
780 | if (rate_mask & (1 << low)) | |
781 | break; | |
e1623446 | 782 | IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
b481de9c ZY |
783 | } |
784 | ||
785 | high = index; | |
786 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 787 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
788 | if (high == IWL_RATE_INVALID) |
789 | break; | |
790 | if (rate_mask & (1 << high)) | |
791 | break; | |
e1623446 | 792 | IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
b481de9c ZY |
793 | } |
794 | ||
795 | return (high << 8) | low; | |
796 | } | |
797 | ||
e227ceac TW |
798 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
799 | struct iwl_scale_tbl_info *tbl, | |
800 | u8 scale_index, u8 ht_possible) | |
b481de9c | 801 | { |
b481de9c ZY |
802 | s32 low; |
803 | u16 rate_mask; | |
804 | u16 high_low; | |
805 | u8 switch_to_legacy = 0; | |
c33104f0 | 806 | u8 is_green = lq_sta->is_green; |
2ff6578b | 807 | struct iwl_priv *priv = lq_sta->drv; |
b481de9c ZY |
808 | |
809 | /* check if we need to switch from HT to legacy rates. | |
810 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
811 | * are always supported (spec demand) */ | |
812 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
813 | switch_to_legacy = 1; | |
814 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 815 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
816 | tbl->lq_type = LQ_A; |
817 | else | |
818 | tbl->lq_type = LQ_G; | |
819 | ||
69fdb309 | 820 | if (num_of_ant(tbl->ant_type) > 1) |
2ff6578b | 821 | tbl->ant_type = |
9e295116 | 822 | first_antenna(priv->hw_params.valid_tx_ant); |
b481de9c | 823 | |
7aafef1c | 824 | tbl->is_ht40 = 0; |
b481de9c | 825 | tbl->is_SGI = 0; |
d6e93399 | 826 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c ZY |
827 | } |
828 | ||
eecd6e57 | 829 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 830 | |
77626355 | 831 | /* Mask with station rate restriction */ |
b481de9c | 832 | if (is_legacy(tbl->lq_type)) { |
77626355 | 833 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 834 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 835 | rate_mask = (u16)(rate_mask & |
c33104f0 | 836 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 837 | else |
c33104f0 | 838 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
839 | } |
840 | ||
77626355 | 841 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 842 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
843 | low = scale_index; |
844 | goto out; | |
b481de9c ZY |
845 | } |
846 | ||
bf403db8 EK |
847 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
848 | tbl->lq_type); | |
b481de9c ZY |
849 | low = high_low & 0xff; |
850 | ||
39e88504 GC |
851 | if (low == IWL_RATE_INVALID) |
852 | low = scale_index; | |
853 | ||
854 | out: | |
978785a3 | 855 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
856 | } |
857 | ||
95407aa4 DH |
858 | /* |
859 | * Simple function to compare two rate scale table types | |
860 | */ | |
861 | static bool table_type_matches(struct iwl_scale_tbl_info *a, | |
862 | struct iwl_scale_tbl_info *b) | |
863 | { | |
864 | return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) && | |
865 | (a->is_SGI == b->is_SGI); | |
866 | } | |
95407aa4 | 867 | |
7e6a5886 JB |
868 | static void rs_bt_update_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
869 | struct iwl_lq_sta *lq_sta) | |
bee008b7 WYG |
870 | { |
871 | struct iwl_scale_tbl_info *tbl; | |
66e863a5 | 872 | bool full_concurrent = priv->bt_full_concurrent; |
bee008b7 | 873 | |
66e863a5 WYG |
874 | if (priv->bt_ant_couple_ok) { |
875 | /* | |
876 | * Is there a need to switch between | |
877 | * full concurrency and 3-wire? | |
878 | */ | |
66e863a5 WYG |
879 | if (priv->bt_ci_compliance && priv->bt_ant_couple_ok) |
880 | full_concurrent = true; | |
881 | else | |
882 | full_concurrent = false; | |
66e863a5 WYG |
883 | } |
884 | if ((priv->bt_traffic_load != priv->last_bt_traffic_load) || | |
885 | (priv->bt_full_concurrent != full_concurrent)) { | |
bee008b7 WYG |
886 | priv->bt_full_concurrent = full_concurrent; |
887 | ||
888 | /* Update uCode's rate table. */ | |
889 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
890 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); | |
7e6a5886 | 891 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
bee008b7 | 892 | |
1ee158d8 | 893 | queue_work(priv->workqueue, &priv->bt_full_concurrency); |
bee008b7 WYG |
894 | } |
895 | } | |
896 | ||
77626355 BC |
897 | /* |
898 | * mac80211 sends us Tx status | |
899 | */ | |
4b7679a5 JB |
900 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
901 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 902 | struct sk_buff *skb) |
b481de9c | 903 | { |
95407aa4 DH |
904 | int legacy_success; |
905 | int retries; | |
906 | int rs_index, mac_index, i; | |
417f114b | 907 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 908 | struct iwl_link_quality_cmd *table; |
b481de9c | 909 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
d0f76d68 EG |
910 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)priv_r; |
911 | struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode); | |
e039fa4a | 912 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5027309b | 913 | enum mac80211_rate_control_flags mac_flags; |
39e88504 | 914 | u32 tx_rate; |
e227ceac | 915 | struct iwl_scale_tbl_info tbl_type; |
04f2dec1 | 916 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
7e6a5886 | 917 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 918 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
b481de9c | 919 | |
e1623446 | 920 | IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
b481de9c | 921 | |
fe6b23dd RC |
922 | /* Treat uninitialized rate scaling data same as non-existing. */ |
923 | if (!lq_sta) { | |
924 | IWL_DEBUG_RATE(priv, "Station rate scaling not created yet.\n"); | |
925 | return; | |
926 | } else if (!lq_sta->drv) { | |
927 | IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); | |
928 | return; | |
929 | } | |
930 | ||
417f114b | 931 | if (!ieee80211_is_data(hdr->frame_control) || |
514d65c1 | 932 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c ZY |
933 | return; |
934 | ||
e3949d62 | 935 | /* This packet was aggregated but doesn't carry status info */ |
e039fa4a JB |
936 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
937 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
938 | return; |
939 | ||
77626355 BC |
940 | /* |
941 | * Ignore this Tx frame response if its initial rate doesn't match | |
942 | * that of latest Link Quality command. There may be stragglers | |
943 | * from a previous Link Quality command, but we're no longer interested | |
944 | * in those; they're either from the "active" mode while we're trying | |
945 | * to check "search" mode, or a prior "search" mode after we've moved | |
946 | * to a new "search" mode (which might become the new "active" mode). | |
947 | */ | |
95407aa4 | 948 | table = &lq_sta->lq; |
39e88504 GC |
949 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
950 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
951 | if (priv->band == IEEE80211_BAND_5GHZ) |
952 | rs_index -= IWL_FIRST_OFDM_RATE; | |
5027309b DH |
953 | mac_flags = info->status.rates[0].flags; |
954 | mac_index = info->status.rates[0].idx; | |
31513be8 DH |
955 | /* For HT packets, map MCS to PLCP */ |
956 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
957 | mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ | |
958 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
959 | mac_index++; | |
392a0baf DH |
960 | /* |
961 | * mac80211 HT index is always zero-indexed; we need to move | |
962 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
963 | */ | |
964 | if (priv->band == IEEE80211_BAND_2GHZ) | |
965 | mac_index += IWL_FIRST_OFDM_RATE; | |
31513be8 | 966 | } |
95407aa4 | 967 | /* Here we actually compare this rate to the latest LQ command */ |
5027309b DH |
968 | if ((mac_index < 0) || |
969 | (tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || | |
970 | (tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
971 | (tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) || | |
d748b464 | 972 | (tbl_type.ant_type != info->status.antenna) || |
5027309b DH |
973 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) || |
974 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
31513be8 DH |
975 | (rs_index != mac_index)) { |
976 | IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate); | |
95407aa4 DH |
977 | /* |
978 | * Since rates mis-match, the last LQ command may have failed. | |
979 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
980 | * ... driver. | |
d5e49036 | 981 | */ |
7d049e5a AM |
982 | lq_sta->missed_rate_counter++; |
983 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
984 | lq_sta->missed_rate_counter = 0; | |
7e6a5886 | 985 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
7d049e5a | 986 | } |
95407aa4 DH |
987 | /* Regardless, ignore this status info for outdated rate */ |
988 | return; | |
989 | } else | |
990 | /* Rate did match, so reset the missed_rate_counter */ | |
991 | lq_sta->missed_rate_counter = 0; | |
992 | ||
993 | /* Figure out if rate scale algorithm is in active or search table */ | |
994 | if (table_type_matches(&tbl_type, | |
995 | &(lq_sta->lq_info[lq_sta->active_tbl]))) { | |
996 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
997 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
998 | } else if (table_type_matches(&tbl_type, | |
999 | &lq_sta->lq_info[1 - lq_sta->active_tbl])) { | |
1000 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
1001 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1002 | } else { | |
1003 | IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n"); | |
80e9158c WYG |
1004 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1005 | IWL_DEBUG_RATE(priv, "active- lq:%x, ant:%x, SGI:%d\n", | |
1006 | tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); | |
1007 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
1008 | IWL_DEBUG_RATE(priv, "search- lq:%x, ant:%x, SGI:%d\n", | |
1009 | tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); | |
1010 | IWL_DEBUG_RATE(priv, "actual- lq:%x, ant:%x, SGI:%d\n", | |
1011 | tbl_type.lq_type, tbl_type.ant_type, tbl_type.is_SGI); | |
1012 | /* | |
1013 | * no matching table found, let's by-pass the data collection | |
1014 | * and continue to perform rate scale to find the rate table | |
1015 | */ | |
da5dbb97 | 1016 | rs_stay_in_table(lq_sta, true); |
80e9158c | 1017 | goto done; |
b481de9c ZY |
1018 | } |
1019 | ||
95407aa4 DH |
1020 | /* |
1021 | * Updating the frame history depends on whether packets were | |
1022 | * aggregated. | |
1023 | * | |
1024 | * For aggregation, all packets were transmitted at the same rate, the | |
1025 | * first index into rate scale table. | |
1026 | */ | |
1027 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
1028 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
1029 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, | |
1030 | &rs_index); | |
04f2dec1 | 1031 | rs_collect_tx_data(curr_tbl, rs_index, |
e3a3cd87 DH |
1032 | info->status.ampdu_len, |
1033 | info->status.ampdu_ack_len); | |
95407aa4 DH |
1034 | |
1035 | /* Update success/fail counts if not searching for new mode */ | |
1036 | if (lq_sta->stay_in_tbl) { | |
e3a3cd87 DH |
1037 | lq_sta->total_success += info->status.ampdu_ack_len; |
1038 | lq_sta->total_failed += (info->status.ampdu_len - | |
1039 | info->status.ampdu_ack_len); | |
b481de9c | 1040 | } |
95407aa4 | 1041 | } else { |
77626355 | 1042 | /* |
95407aa4 | 1043 | * For legacy, update frame history with for each Tx retry. |
77626355 | 1044 | */ |
95407aa4 DH |
1045 | retries = info->status.rates[0].count - 1; |
1046 | /* HW doesn't send more than 15 retries */ | |
1047 | retries = min(retries, 15); | |
1048 | ||
1049 | /* The last transmission may have been successful */ | |
1050 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1051 | /* Collect data for each rate used during failed TX attempts */ | |
1052 | for (i = 0; i <= retries; ++i) { | |
1053 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
1054 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
1055 | &tbl_type, &rs_index); | |
1056 | /* | |
1057 | * Only collect stats if retried rate is in the same RS | |
1058 | * table as active/search. | |
1059 | */ | |
1060 | if (table_type_matches(&tbl_type, curr_tbl)) | |
04f2dec1 | 1061 | tmp_tbl = curr_tbl; |
95407aa4 | 1062 | else if (table_type_matches(&tbl_type, other_tbl)) |
04f2dec1 | 1063 | tmp_tbl = other_tbl; |
95407aa4 DH |
1064 | else |
1065 | continue; | |
04f2dec1 SZ |
1066 | rs_collect_tx_data(tmp_tbl, rs_index, 1, |
1067 | i < retries ? 0 : legacy_success); | |
95407aa4 DH |
1068 | } |
1069 | ||
1070 | /* Update success/fail counts if not searching for new mode */ | |
1071 | if (lq_sta->stay_in_tbl) { | |
1072 | lq_sta->total_success += legacy_success; | |
1073 | lq_sta->total_failed += retries + (1 - legacy_success); | |
99556438 | 1074 | } |
b481de9c | 1075 | } |
95407aa4 DH |
1076 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ |
1077 | lq_sta->last_rate_n_flags = tx_rate; | |
80e9158c | 1078 | done: |
77626355 | 1079 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c | 1080 | if (sta && sta->supp_rates[sband->band]) |
514d65c1 | 1081 | rs_rate_scale_perform(priv, skb, sta, lq_sta); |
c10e2c10 | 1082 | |
5ef15ccc | 1083 | #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_IWLWIFI_DEVICE_TESTMODE) |
4e308119 WYG |
1084 | if ((priv->tm_fixed_rate) && |
1085 | (priv->tm_fixed_rate != lq_sta->dbg_fixed_rate)) | |
6489854b WYG |
1086 | rs_program_fix_rate(priv, lq_sta); |
1087 | #endif | |
38622419 | 1088 | if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist) |
7e6a5886 | 1089 | rs_bt_update_lq(priv, ctx, lq_sta); |
b481de9c ZY |
1090 | } |
1091 | ||
77626355 BC |
1092 | /* |
1093 | * Begin a period of staying with a selected modulation mode. | |
1094 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1095 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1096 | * and reset overall (spanning all rates) tx success history statistics. | |
1097 | * These control how long we stay using same modulation mode before | |
1098 | * searching for a new mode. | |
1099 | */ | |
bf403db8 | 1100 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 1101 | struct iwl_lq_sta *lq_sta) |
b481de9c | 1102 | { |
e1623446 | 1103 | IWL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
c33104f0 | 1104 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 1105 | if (is_legacy) { |
c33104f0 TW |
1106 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
1107 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
1108 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1109 | } else { |
c33104f0 TW |
1110 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
1111 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
1112 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1113 | } |
c33104f0 TW |
1114 | lq_sta->table_count = 0; |
1115 | lq_sta->total_failed = 0; | |
1116 | lq_sta->total_success = 0; | |
447fee70 | 1117 | lq_sta->flush_timer = jiffies; |
d6e93399 | 1118 | lq_sta->action_counter = 0; |
b481de9c ZY |
1119 | } |
1120 | ||
77626355 BC |
1121 | /* |
1122 | * Find correct throughput table for given mode of modulation | |
1123 | */ | |
e227ceac TW |
1124 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
1125 | struct iwl_scale_tbl_info *tbl) | |
b481de9c | 1126 | { |
e3949d62 DH |
1127 | /* Used to choose among HT tables */ |
1128 | s32 (*ht_tbl_pointer)[IWL_RATE_COUNT]; | |
1129 | ||
1130 | /* Check for invalid LQ type */ | |
1131 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
1132 | tbl->expected_tpt = expected_tpt_legacy; | |
1133 | return; | |
1134 | } | |
1135 | ||
1136 | /* Legacy rates have only one table */ | |
b481de9c | 1137 | if (is_legacy(tbl->lq_type)) { |
e3949d62 DH |
1138 | tbl->expected_tpt = expected_tpt_legacy; |
1139 | return; | |
1140 | } | |
1141 | ||
1142 | /* Choose among many HT tables depending on number of streams | |
1143 | * (SISO/MIMO2/MIMO3), channel width (20/40), SGI, and aggregation | |
1144 | * status */ | |
1145 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1146 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
1147 | else if (is_siso(tbl->lq_type)) | |
1148 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
1149 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1150 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1151 | else if (is_mimo2(tbl->lq_type)) | |
1152 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1153 | else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1154 | ht_tbl_pointer = expected_tpt_mimo3_20MHz; | |
1155 | else /* if (is_mimo3(tbl->lq_type)) <-- must be true */ | |
1156 | ht_tbl_pointer = expected_tpt_mimo3_40MHz; | |
1157 | ||
1158 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ | |
1159 | tbl->expected_tpt = ht_tbl_pointer[0]; | |
1160 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
1161 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
1162 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
1163 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
1164 | else /* AGG+SGI */ | |
1165 | tbl->expected_tpt = ht_tbl_pointer[3]; | |
b481de9c ZY |
1166 | } |
1167 | ||
77626355 BC |
1168 | /* |
1169 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1170 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1171 | * above the current measured throughput of "active" mode, to give new mode | |
1172 | * a fair chance to prove itself without too many challenges. | |
1173 | * | |
1174 | * This gets called when transitioning to more aggressive modulation | |
1175 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1176 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1177 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1178 | * bit rate will typically need to increase, but not if performance was bad. | |
1179 | */ | |
c79dd5b5 | 1180 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1181 | struct iwl_lq_sta *lq_sta, |
1182 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1183 | u16 rate_mask, s8 index) |
b481de9c | 1184 | { |
77626355 | 1185 | /* "active" values */ |
e227ceac | 1186 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1187 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1188 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1189 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1190 | |
1191 | /* expected "search" throughput */ | |
1192 | s32 *tpt_tbl = tbl->expected_tpt; | |
1193 | ||
1194 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1195 | u16 high_low; |
f935a6da | 1196 | s8 rate = index; |
b481de9c ZY |
1197 | |
1198 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1199 | ||
1200 | for (; ;) { | |
bf403db8 EK |
1201 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1202 | tbl->lq_type); | |
b481de9c ZY |
1203 | |
1204 | low = high_low & 0xff; | |
1205 | high = (high_low >> 8) & 0xff; | |
1206 | ||
77626355 BC |
1207 | /* |
1208 | * Lower the "search" bit rate, to give new "search" mode | |
1209 | * approximately the same throughput as "active" if: | |
1210 | * | |
1211 | * 1) "Active" mode has been working modestly well (but not | |
1212 | * great), and expected "search" throughput (under perfect | |
1213 | * conditions) at candidate rate is above the actual | |
1214 | * measured "active" throughput (but less than expected | |
1215 | * "active" throughput under perfect conditions). | |
1216 | * OR | |
1217 | * 2) "Active" mode has been working perfectly or very well | |
1218 | * and expected "search" throughput (under perfect | |
1219 | * conditions) at candidate rate is above expected | |
1220 | * "active" throughput (under perfect conditions). | |
1221 | */ | |
c33104f0 | 1222 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1223 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1224 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1225 | (tpt_tbl[rate] <= active_tpt))) || | |
1226 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1227 | (tpt_tbl[rate] > active_tpt))) { | |
1228 | ||
77626355 BC |
1229 | /* (2nd or later pass) |
1230 | * If we've already tried to raise the rate, and are | |
1231 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1232 | if (start_hi != IWL_RATE_INVALID) { |
1233 | new_rate = start_hi; | |
1234 | break; | |
1235 | } | |
77626355 | 1236 | |
b481de9c | 1237 | new_rate = rate; |
77626355 BC |
1238 | |
1239 | /* Loop again with lower rate */ | |
b481de9c ZY |
1240 | if (low != IWL_RATE_INVALID) |
1241 | rate = low; | |
77626355 BC |
1242 | |
1243 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1244 | else |
1245 | break; | |
77626355 BC |
1246 | |
1247 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1248 | } else { |
77626355 BC |
1249 | /* (2nd or later pass) |
1250 | * If we've already tried to lower the rate, and are | |
1251 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1252 | if (new_rate != IWL_RATE_INVALID) |
1253 | break; | |
77626355 BC |
1254 | |
1255 | /* Loop again with higher rate */ | |
b481de9c ZY |
1256 | else if (high != IWL_RATE_INVALID) { |
1257 | start_hi = high; | |
1258 | rate = high; | |
77626355 BC |
1259 | |
1260 | /* Higher rate not available, use the original */ | |
b481de9c | 1261 | } else { |
90d7795e | 1262 | new_rate = rate; |
b481de9c ZY |
1263 | break; |
1264 | } | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | return new_rate; | |
1269 | } | |
b481de9c | 1270 | |
77626355 | 1271 | /* |
584a0f00 | 1272 | * Set up search table for MIMO2 |
77626355 | 1273 | */ |
fde0db31 | 1274 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1275 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1276 | struct ieee80211_conf *conf, |
4b7679a5 | 1277 | struct ieee80211_sta *sta, |
e227ceac | 1278 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1279 | { |
b481de9c ZY |
1280 | u16 rate_mask; |
1281 | s32 rate; | |
c33104f0 | 1282 | s8 is_green = lq_sta->is_green; |
7e6a5886 | 1283 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 1284 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
b481de9c | 1285 | |
de27e64e | 1286 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1287 | return -1; |
1288 | ||
d9fe60de | 1289 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1290 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1291 | return -1; |
1292 | ||
77626355 | 1293 | /* Need both Tx chains/antennas to support MIMO */ |
9e295116 | 1294 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1295 | return -1; |
1296 | ||
e1623446 | 1297 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1298 | |
1299 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1300 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1301 | tbl->action = 0; |
d6e93399 | 1302 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 GC |
1303 | rate_mask = lq_sta->active_mimo2_rate; |
1304 | ||
7e6a5886 | 1305 | if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
7aafef1c | 1306 | tbl->is_ht40 = 1; |
b481de9c | 1307 | else |
7aafef1c | 1308 | tbl->is_ht40 = 0; |
b481de9c | 1309 | |
eecd6e57 | 1310 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1311 | |
f935a6da | 1312 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1313 | |
e1623446 | 1314 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
584a0f00 WYG |
1315 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
1316 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", | |
1317 | rate, rate_mask); | |
1318 | return -1; | |
1319 | } | |
1320 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); | |
1321 | ||
1322 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", | |
1323 | tbl->current_rate, is_green); | |
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | /* | |
1328 | * Set up search table for MIMO3 | |
1329 | */ | |
1330 | static int rs_switch_to_mimo3(struct iwl_priv *priv, | |
1331 | struct iwl_lq_sta *lq_sta, | |
1332 | struct ieee80211_conf *conf, | |
1333 | struct ieee80211_sta *sta, | |
1334 | struct iwl_scale_tbl_info *tbl, int index) | |
1335 | { | |
1336 | u16 rate_mask; | |
1337 | s32 rate; | |
1338 | s8 is_green = lq_sta->is_green; | |
7e6a5886 | 1339 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 1340 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
584a0f00 WYG |
1341 | |
1342 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1343 | return -1; | |
1344 | ||
1345 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) | |
1346 | == WLAN_HT_CAP_SM_PS_STATIC) | |
1347 | return -1; | |
1348 | ||
1349 | /* Need both Tx chains/antennas to support MIMO */ | |
9e295116 | 1350 | if (priv->hw_params.tx_chains_num < 3) |
584a0f00 WYG |
1351 | return -1; |
1352 | ||
1353 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); | |
1354 | ||
1355 | tbl->lq_type = LQ_MIMO3; | |
1356 | tbl->is_dup = lq_sta->is_dup; | |
1357 | tbl->action = 0; | |
d6e93399 | 1358 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; |
584a0f00 WYG |
1359 | rate_mask = lq_sta->active_mimo3_rate; |
1360 | ||
7e6a5886 | 1361 | if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
7aafef1c | 1362 | tbl->is_ht40 = 1; |
584a0f00 | 1363 | else |
7aafef1c | 1364 | tbl->is_ht40 = 0; |
39e88504 | 1365 | |
584a0f00 WYG |
1366 | rs_set_expected_tpt_table(lq_sta, tbl); |
1367 | ||
1368 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); | |
1369 | ||
1370 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n", | |
1371 | rate, rate_mask); | |
39e88504 | 1372 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1373 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
39e88504 | 1374 | rate, rate_mask); |
b481de9c | 1375 | return -1; |
39e88504 | 1376 | } |
978785a3 | 1377 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
b481de9c | 1378 | |
e1623446 | 1379 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1380 | tbl->current_rate, is_green); |
dc2453ae | 1381 | return 0; |
fde0db31 | 1382 | } |
b481de9c | 1383 | |
77626355 BC |
1384 | /* |
1385 | * Set up search table for SISO | |
1386 | */ | |
c79dd5b5 | 1387 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1388 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1389 | struct ieee80211_conf *conf, |
4b7679a5 | 1390 | struct ieee80211_sta *sta, |
e227ceac | 1391 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1392 | { |
b481de9c | 1393 | u16 rate_mask; |
c33104f0 | 1394 | u8 is_green = lq_sta->is_green; |
b481de9c | 1395 | s32 rate; |
7e6a5886 | 1396 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 1397 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
b481de9c | 1398 | |
de27e64e | 1399 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1400 | return -1; |
1401 | ||
e1623446 | 1402 | IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n"); |
39e88504 | 1403 | |
c33104f0 | 1404 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1405 | tbl->lq_type = LQ_SISO; |
1406 | tbl->action = 0; | |
d6e93399 | 1407 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 | 1408 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1409 | |
7e6a5886 | 1410 | if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
7aafef1c | 1411 | tbl->is_ht40 = 1; |
b481de9c | 1412 | else |
7aafef1c | 1413 | tbl->is_ht40 = 0; |
b481de9c | 1414 | |
b481de9c | 1415 | if (is_green) |
39e88504 | 1416 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1417 | |
eecd6e57 | 1418 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1419 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1420 | |
e1623446 | 1421 | IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1422 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1423 | IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1424 | rate, rate_mask); |
1425 | return -1; | |
1426 | } | |
978785a3 | 1427 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
e1623446 | 1428 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1429 | tbl->current_rate, is_green); |
403ab56b | 1430 | return 0; |
b481de9c ZY |
1431 | } |
1432 | ||
77626355 BC |
1433 | /* |
1434 | * Try to switch to new modulation mode from legacy | |
1435 | */ | |
c79dd5b5 | 1436 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1437 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1438 | struct ieee80211_conf *conf, |
4b7679a5 | 1439 | struct ieee80211_sta *sta, |
b481de9c ZY |
1440 | int index) |
1441 | { | |
e227ceac TW |
1442 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1443 | struct iwl_scale_tbl_info *search_tbl = | |
1444 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1445 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1446 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1447 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b1a78858 | 1448 | u8 start_action; |
9e295116 JB |
1449 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1450 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
fde0db31 | 1451 | int ret = 0; |
d6e93399 | 1452 | u8 update_search_tbl_counter = 0; |
b481de9c | 1453 | |
290f599c JB |
1454 | switch (priv->bt_traffic_load) { |
1455 | case IWL_BT_COEX_TRAFFIC_LOAD_NONE: | |
1456 | /* nothing */ | |
1457 | break; | |
1458 | case IWL_BT_COEX_TRAFFIC_LOAD_LOW: | |
1459 | /* avoid antenna B unless MIMO */ | |
1460 | if (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2) | |
383b0874 | 1461 | tbl->action = IWL_LEGACY_SWITCH_SISO; |
290f599c JB |
1462 | break; |
1463 | case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: | |
1464 | case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: | |
1465 | /* avoid antenna B and MIMO */ | |
d6189124 | 1466 | valid_tx_ant = |
9e295116 | 1467 | first_antenna(priv->hw_params.valid_tx_ant); |
290f599c JB |
1468 | if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2 && |
1469 | tbl->action != IWL_LEGACY_SWITCH_SISO) | |
da5dbb97 | 1470 | tbl->action = IWL_LEGACY_SWITCH_SISO; |
290f599c JB |
1471 | break; |
1472 | default: | |
1473 | IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load); | |
1474 | break; | |
1475 | } | |
1476 | ||
46f9381a WYG |
1477 | if (!iwl_ht_enabled(priv)) |
1478 | /* stay in Legacy */ | |
1479 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
3ad3b92a | 1480 | else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1481 | tbl->action > IWL_LEGACY_SWITCH_SISO) |
1482 | tbl->action = IWL_LEGACY_SWITCH_SISO; | |
bee008b7 WYG |
1483 | |
1484 | /* configure as 1x1 if bt full concurrency */ | |
1485 | if (priv->bt_full_concurrent) { | |
1486 | if (!iwl_ht_enabled(priv)) | |
1487 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
1488 | else if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2) | |
1489 | tbl->action = IWL_LEGACY_SWITCH_SISO; | |
d6189124 | 1490 | valid_tx_ant = |
9e295116 | 1491 | first_antenna(priv->hw_params.valid_tx_ant); |
bee008b7 WYG |
1492 | } |
1493 | ||
b1a78858 | 1494 | start_action = tbl->action; |
b481de9c | 1495 | for (; ;) { |
d6e93399 | 1496 | lq_sta->action_counter++; |
b481de9c | 1497 | switch (tbl->action) { |
3110bef7 GC |
1498 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1499 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
e1623446 | 1500 | IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
b481de9c | 1501 | |
3110bef7 GC |
1502 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1503 | tx_chains_num <= 1) || | |
1504 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1505 | tx_chains_num <= 2)) | |
1506 | break; | |
1507 | ||
77626355 | 1508 | /* Don't change antenna if success has been great */ |
da5dbb97 WYG |
1509 | if (window->success_ratio >= IWL_RS_GOOD_RATIO && |
1510 | !priv->bt_full_concurrent && | |
1511 | priv->bt_traffic_load == | |
1512 | IWL_BT_COEX_TRAFFIC_LOAD_NONE) | |
b481de9c | 1513 | break; |
77626355 | 1514 | |
77626355 | 1515 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1516 | memcpy(search_tbl, tbl, sz); |
1517 | ||
aade00ce GC |
1518 | if (rs_toggle_antenna(valid_tx_ant, |
1519 | &search_tbl->current_rate, search_tbl)) { | |
d6e93399 | 1520 | update_search_tbl_counter = 1; |
3110bef7 | 1521 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1522 | goto out; |
1523 | } | |
a5e8b505 | 1524 | break; |
b481de9c | 1525 | case IWL_LEGACY_SWITCH_SISO: |
e1623446 | 1526 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
77626355 BC |
1527 | |
1528 | /* Set up search table to try SISO */ | |
b481de9c | 1529 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1530 | search_tbl->is_SGI = 0; |
c33104f0 | 1531 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1532 | search_tbl, index); |
dc2453ae | 1533 | if (!ret) { |
c33104f0 | 1534 | lq_sta->action_counter = 0; |
b481de9c | 1535 | goto out; |
dc2453ae | 1536 | } |
b481de9c ZY |
1537 | |
1538 | break; | |
3110bef7 GC |
1539 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1540 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1541 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
e1623446 | 1542 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1543 | |
1544 | /* Set up search table to try MIMO */ | |
b481de9c | 1545 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1546 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1547 | |
1548 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1549 | search_tbl->ant_type = ANT_AB; | |
1550 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1551 | search_tbl->ant_type = ANT_AC; | |
1552 | else | |
1553 | search_tbl->ant_type = ANT_BC; | |
1554 | ||
1555 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1556 | break; | |
1557 | ||
fde0db31 | 1558 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1559 | search_tbl, index); |
dc2453ae | 1560 | if (!ret) { |
c33104f0 | 1561 | lq_sta->action_counter = 0; |
b481de9c | 1562 | goto out; |
dc2453ae | 1563 | } |
b481de9c | 1564 | break; |
584a0f00 WYG |
1565 | |
1566 | case IWL_LEGACY_SWITCH_MIMO3_ABC: | |
1567 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); | |
1568 | ||
1569 | /* Set up search table to try MIMO3 */ | |
1570 | memcpy(search_tbl, tbl, sz); | |
1571 | search_tbl->is_SGI = 0; | |
1572 | ||
1573 | search_tbl->ant_type = ANT_ABC; | |
1574 | ||
1575 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1576 | break; | |
1577 | ||
1578 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1579 | search_tbl, index); | |
1580 | if (!ret) { | |
1581 | lq_sta->action_counter = 0; | |
1582 | goto out; | |
1583 | } | |
1584 | break; | |
b481de9c ZY |
1585 | } |
1586 | tbl->action++; | |
584a0f00 | 1587 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1588 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
b481de9c ZY |
1589 | |
1590 | if (tbl->action == start_action) | |
1591 | break; | |
1592 | ||
1593 | } | |
3110bef7 | 1594 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1595 | return 0; |
1596 | ||
3110bef7 GC |
1597 | out: |
1598 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1599 | tbl->action++; |
584a0f00 | 1600 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1601 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
d6e93399 MA |
1602 | if (update_search_tbl_counter) |
1603 | search_tbl->action = tbl->action; | |
b481de9c ZY |
1604 | return 0; |
1605 | ||
1606 | } | |
1607 | ||
77626355 BC |
1608 | /* |
1609 | * Try to switch to new modulation mode from SISO | |
1610 | */ | |
c79dd5b5 | 1611 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1612 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1613 | struct ieee80211_conf *conf, |
4b7679a5 | 1614 | struct ieee80211_sta *sta, int index) |
b481de9c | 1615 | { |
c33104f0 | 1616 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1617 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1618 | struct iwl_scale_tbl_info *search_tbl = | |
1619 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1620 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1621 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1622 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1623 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b1a78858 | 1624 | u8 start_action; |
9e295116 JB |
1625 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1626 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
d6e93399 | 1627 | u8 update_search_tbl_counter = 0; |
fde0db31 | 1628 | int ret; |
b481de9c | 1629 | |
290f599c JB |
1630 | switch (priv->bt_traffic_load) { |
1631 | case IWL_BT_COEX_TRAFFIC_LOAD_NONE: | |
1632 | /* nothing */ | |
1633 | break; | |
1634 | case IWL_BT_COEX_TRAFFIC_LOAD_LOW: | |
1635 | /* avoid antenna B unless MIMO */ | |
1636 | if (tbl->action == IWL_SISO_SWITCH_ANTENNA2) | |
383b0874 | 1637 | tbl->action = IWL_SISO_SWITCH_MIMO2_AB; |
290f599c JB |
1638 | break; |
1639 | case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: | |
1640 | case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: | |
1641 | /* avoid antenna B and MIMO */ | |
d6189124 | 1642 | valid_tx_ant = |
9e295116 | 1643 | first_antenna(priv->hw_params.valid_tx_ant); |
da5dbb97 | 1644 | if (tbl->action != IWL_SISO_SWITCH_ANTENNA1) |
290f599c JB |
1645 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
1646 | break; | |
1647 | default: | |
1648 | IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load); | |
1649 | break; | |
1650 | } | |
1651 | ||
3ad3b92a | 1652 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1653 | tbl->action > IWL_SISO_SWITCH_ANTENNA2) { |
1654 | /* stay in SISO */ | |
1655 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; | |
1656 | } | |
bee008b7 WYG |
1657 | |
1658 | /* configure as 1x1 if bt full concurrency */ | |
da5dbb97 | 1659 | if (priv->bt_full_concurrent) { |
d6189124 | 1660 | valid_tx_ant = |
9e295116 | 1661 | first_antenna(priv->hw_params.valid_tx_ant); |
da5dbb97 WYG |
1662 | if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2) |
1663 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; | |
1664 | } | |
bee008b7 | 1665 | |
b1a78858 | 1666 | start_action = tbl->action; |
b481de9c | 1667 | for (;;) { |
c33104f0 | 1668 | lq_sta->action_counter++; |
b481de9c | 1669 | switch (tbl->action) { |
3110bef7 GC |
1670 | case IWL_SISO_SWITCH_ANTENNA1: |
1671 | case IWL_SISO_SWITCH_ANTENNA2: | |
e1623446 | 1672 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
3110bef7 | 1673 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && |
da5dbb97 | 1674 | tx_chains_num <= 1) || |
3110bef7 | 1675 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && |
da5dbb97 | 1676 | tx_chains_num <= 2)) |
3110bef7 GC |
1677 | break; |
1678 | ||
da5dbb97 WYG |
1679 | if (window->success_ratio >= IWL_RS_GOOD_RATIO && |
1680 | !priv->bt_full_concurrent && | |
1681 | priv->bt_traffic_load == | |
1682 | IWL_BT_COEX_TRAFFIC_LOAD_NONE) | |
b481de9c | 1683 | break; |
b481de9c ZY |
1684 | |
1685 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1686 | if (rs_toggle_antenna(valid_tx_ant, |
d6e93399 MA |
1687 | &search_tbl->current_rate, search_tbl)) { |
1688 | update_search_tbl_counter = 1; | |
aade00ce | 1689 | goto out; |
d6e93399 | 1690 | } |
a5e8b505 | 1691 | break; |
3110bef7 GC |
1692 | case IWL_SISO_SWITCH_MIMO2_AB: |
1693 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1694 | case IWL_SISO_SWITCH_MIMO2_BC: | |
e1623446 | 1695 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
b481de9c | 1696 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1697 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1698 | |
1699 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1700 | search_tbl->ant_type = ANT_AB; | |
1701 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1702 | search_tbl->ant_type = ANT_AC; | |
1703 | else | |
1704 | search_tbl->ant_type = ANT_BC; | |
1705 | ||
1706 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1707 | break; | |
1708 | ||
fde0db31 | 1709 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1710 | search_tbl, index); |
3110bef7 | 1711 | if (!ret) |
b481de9c ZY |
1712 | goto out; |
1713 | break; | |
1714 | case IWL_SISO_SWITCH_GI: | |
28e6f489 DH |
1715 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1716 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1717 | break; |
28e6f489 DH |
1718 | if (tbl->is_ht40 && !(ht_cap->cap & |
1719 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1720 | break; |
1721 | ||
e1623446 | 1722 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1723 | |
b481de9c | 1724 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1725 | if (is_green) { |
1726 | if (!tbl->is_SGI) | |
1727 | break; | |
1728 | else | |
15b1687c WT |
1729 | IWL_ERR(priv, |
1730 | "SGI was set in GF+SISO\n"); | |
b481de9c | 1731 | } |
39e88504 | 1732 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1733 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1734 | if (tbl->is_SGI) { |
1735 | s32 tpt = lq_sta->last_tpt / 100; | |
1736 | if (tpt >= search_tbl->expected_tpt[index]) | |
1737 | break; | |
1738 | } | |
978785a3 TW |
1739 | search_tbl->current_rate = |
1740 | rate_n_flags_from_tbl(priv, search_tbl, | |
1741 | index, is_green); | |
d6e93399 | 1742 | update_search_tbl_counter = 1; |
b481de9c | 1743 | goto out; |
584a0f00 WYG |
1744 | case IWL_SISO_SWITCH_MIMO3_ABC: |
1745 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); | |
1746 | memcpy(search_tbl, tbl, sz); | |
1747 | search_tbl->is_SGI = 0; | |
1748 | search_tbl->ant_type = ANT_ABC; | |
1749 | ||
1750 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1751 | break; | |
1752 | ||
1753 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1754 | search_tbl, index); | |
1755 | if (!ret) | |
1756 | goto out; | |
1757 | break; | |
b481de9c ZY |
1758 | } |
1759 | tbl->action++; | |
584a0f00 | 1760 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1761 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1762 | |
1763 | if (tbl->action == start_action) | |
1764 | break; | |
1765 | } | |
3110bef7 | 1766 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1767 | return 0; |
1768 | ||
1769 | out: | |
3110bef7 | 1770 | lq_sta->search_better_tbl = 1; |
b481de9c | 1771 | tbl->action++; |
584a0f00 | 1772 | if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC) |
3110bef7 | 1773 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
d6e93399 MA |
1774 | if (update_search_tbl_counter) |
1775 | search_tbl->action = tbl->action; | |
1776 | ||
b481de9c ZY |
1777 | return 0; |
1778 | } | |
1779 | ||
77626355 | 1780 | /* |
584a0f00 | 1781 | * Try to switch to new modulation mode from MIMO2 |
77626355 | 1782 | */ |
584a0f00 | 1783 | static int rs_move_mimo2_to_other(struct iwl_priv *priv, |
e227ceac | 1784 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1785 | struct ieee80211_conf *conf, |
4b7679a5 | 1786 | struct ieee80211_sta *sta, int index) |
b481de9c | 1787 | { |
c33104f0 | 1788 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1789 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1790 | struct iwl_scale_tbl_info *search_tbl = | |
1791 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1792 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
28e6f489 | 1793 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1794 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1795 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b1a78858 | 1796 | u8 start_action; |
9e295116 JB |
1797 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1798 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
d6e93399 | 1799 | u8 update_search_tbl_counter = 0; |
aade00ce | 1800 | int ret; |
b481de9c | 1801 | |
290f599c JB |
1802 | switch (priv->bt_traffic_load) { |
1803 | case IWL_BT_COEX_TRAFFIC_LOAD_NONE: | |
1804 | /* nothing */ | |
1805 | break; | |
1806 | case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: | |
1807 | case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: | |
1808 | /* avoid antenna B and MIMO */ | |
da5dbb97 WYG |
1809 | if (tbl->action != IWL_MIMO2_SWITCH_SISO_A) |
1810 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1811 | break; | |
290f599c JB |
1812 | case IWL_BT_COEX_TRAFFIC_LOAD_LOW: |
1813 | /* avoid antenna B unless MIMO */ | |
da5dbb97 WYG |
1814 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_B || |
1815 | tbl->action == IWL_MIMO2_SWITCH_SISO_C) | |
290f599c JB |
1816 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; |
1817 | break; | |
1818 | default: | |
1819 | IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load); | |
1820 | break; | |
1821 | } | |
1822 | ||
3ad3b92a | 1823 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1824 | (tbl->action < IWL_MIMO2_SWITCH_SISO_A || |
1825 | tbl->action > IWL_MIMO2_SWITCH_SISO_C)) { | |
1826 | /* switch in SISO */ | |
1827 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1828 | } | |
bee008b7 WYG |
1829 | |
1830 | /* configure as 1x1 if bt full concurrency */ | |
1831 | if (priv->bt_full_concurrent && | |
1832 | (tbl->action < IWL_MIMO2_SWITCH_SISO_A || | |
1833 | tbl->action > IWL_MIMO2_SWITCH_SISO_C)) | |
1834 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1835 | ||
b1a78858 | 1836 | start_action = tbl->action; |
b481de9c | 1837 | for (;;) { |
c33104f0 | 1838 | lq_sta->action_counter++; |
b481de9c | 1839 | switch (tbl->action) { |
3110bef7 GC |
1840 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1841 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
584a0f00 | 1842 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); |
3110bef7 GC |
1843 | |
1844 | if (tx_chains_num <= 2) | |
1845 | break; | |
1846 | ||
1847 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1848 | break; | |
1849 | ||
1850 | memcpy(search_tbl, tbl, sz); | |
1851 | if (rs_toggle_antenna(valid_tx_ant, | |
d6e93399 MA |
1852 | &search_tbl->current_rate, search_tbl)) { |
1853 | update_search_tbl_counter = 1; | |
3110bef7 | 1854 | goto out; |
d6e93399 | 1855 | } |
3110bef7 GC |
1856 | break; |
1857 | case IWL_MIMO2_SWITCH_SISO_A: | |
1858 | case IWL_MIMO2_SWITCH_SISO_B: | |
1859 | case IWL_MIMO2_SWITCH_SISO_C: | |
e1623446 | 1860 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1861 | |
77626355 | 1862 | /* Set up new search table for SISO */ |
b481de9c | 1863 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1864 | |
3110bef7 | 1865 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1866 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1867 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1868 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1869 | else |
1870 | search_tbl->ant_type = ANT_C; | |
1871 | ||
1872 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1873 | break; | |
b481de9c | 1874 | |
c33104f0 | 1875 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1876 | search_tbl, index); |
3110bef7 | 1877 | if (!ret) |
b481de9c | 1878 | goto out; |
3110bef7 | 1879 | |
b481de9c ZY |
1880 | break; |
1881 | ||
3110bef7 | 1882 | case IWL_MIMO2_SWITCH_GI: |
28e6f489 DH |
1883 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1884 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1885 | break; |
28e6f489 DH |
1886 | if (tbl->is_ht40 && !(ht_cap->cap & |
1887 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1888 | break; |
1889 | ||
584a0f00 | 1890 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); |
77626355 | 1891 | |
584a0f00 | 1892 | /* Set up new search table for MIMO2 */ |
b481de9c | 1893 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1894 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1895 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1896 | /* |
1897 | * If active table already uses the fastest possible | |
1898 | * modulation (dual stream with short guard interval), | |
1899 | * and it's working well, there's no need to look | |
1900 | * for a better type of modulation! | |
1901 | */ | |
39e88504 | 1902 | if (tbl->is_SGI) { |
c33104f0 | 1903 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1904 | if (tpt >= search_tbl->expected_tpt[index]) |
1905 | break; | |
b481de9c | 1906 | } |
978785a3 TW |
1907 | search_tbl->current_rate = |
1908 | rate_n_flags_from_tbl(priv, search_tbl, | |
1909 | index, is_green); | |
d6e93399 | 1910 | update_search_tbl_counter = 1; |
b481de9c ZY |
1911 | goto out; |
1912 | ||
584a0f00 WYG |
1913 | case IWL_MIMO2_SWITCH_MIMO3_ABC: |
1914 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); | |
1915 | memcpy(search_tbl, tbl, sz); | |
1916 | search_tbl->is_SGI = 0; | |
1917 | search_tbl->ant_type = ANT_ABC; | |
1918 | ||
1919 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1920 | break; | |
1921 | ||
1922 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1923 | search_tbl, index); | |
1924 | if (!ret) | |
1925 | goto out; | |
1926 | ||
1927 | break; | |
b481de9c ZY |
1928 | } |
1929 | tbl->action++; | |
584a0f00 | 1930 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1931 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
b481de9c ZY |
1932 | |
1933 | if (tbl->action == start_action) | |
1934 | break; | |
1935 | } | |
3110bef7 | 1936 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1937 | return 0; |
1938 | out: | |
3110bef7 | 1939 | lq_sta->search_better_tbl = 1; |
b481de9c | 1940 | tbl->action++; |
584a0f00 | 1941 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1942 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
d6e93399 MA |
1943 | if (update_search_tbl_counter) |
1944 | search_tbl->action = tbl->action; | |
1945 | ||
b481de9c ZY |
1946 | return 0; |
1947 | ||
1948 | } | |
1949 | ||
584a0f00 WYG |
1950 | /* |
1951 | * Try to switch to new modulation mode from MIMO3 | |
1952 | */ | |
1953 | static int rs_move_mimo3_to_other(struct iwl_priv *priv, | |
1954 | struct iwl_lq_sta *lq_sta, | |
1955 | struct ieee80211_conf *conf, | |
1956 | struct ieee80211_sta *sta, int index) | |
1957 | { | |
1958 | s8 is_green = lq_sta->is_green; | |
1959 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1960 | struct iwl_scale_tbl_info *search_tbl = | |
1961 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1962 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1963 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
584a0f00 WYG |
1964 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1965 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b1a78858 | 1966 | u8 start_action; |
9e295116 JB |
1967 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1968 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
584a0f00 | 1969 | int ret; |
d6e93399 | 1970 | u8 update_search_tbl_counter = 0; |
584a0f00 | 1971 | |
290f599c JB |
1972 | switch (priv->bt_traffic_load) { |
1973 | case IWL_BT_COEX_TRAFFIC_LOAD_NONE: | |
1974 | /* nothing */ | |
1975 | break; | |
1976 | case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: | |
1977 | case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: | |
1978 | /* avoid antenna B and MIMO */ | |
da5dbb97 | 1979 | if (tbl->action != IWL_MIMO3_SWITCH_SISO_A) |
290f599c | 1980 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; |
da5dbb97 | 1981 | break; |
290f599c JB |
1982 | case IWL_BT_COEX_TRAFFIC_LOAD_LOW: |
1983 | /* avoid antenna B unless MIMO */ | |
da5dbb97 WYG |
1984 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_B || |
1985 | tbl->action == IWL_MIMO3_SWITCH_SISO_C) | |
290f599c | 1986 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; |
290f599c JB |
1987 | break; |
1988 | default: | |
1989 | IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load); | |
1990 | break; | |
1991 | } | |
1992 | ||
3ad3b92a | 1993 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1994 | (tbl->action < IWL_MIMO3_SWITCH_SISO_A || |
1995 | tbl->action > IWL_MIMO3_SWITCH_SISO_C)) { | |
1996 | /* switch in SISO */ | |
1997 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; | |
1998 | } | |
bee008b7 WYG |
1999 | |
2000 | /* configure as 1x1 if bt full concurrency */ | |
2001 | if (priv->bt_full_concurrent && | |
2002 | (tbl->action < IWL_MIMO3_SWITCH_SISO_A || | |
2003 | tbl->action > IWL_MIMO3_SWITCH_SISO_C)) | |
2004 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; | |
2005 | ||
b1a78858 | 2006 | start_action = tbl->action; |
584a0f00 WYG |
2007 | for (;;) { |
2008 | lq_sta->action_counter++; | |
2009 | switch (tbl->action) { | |
2010 | case IWL_MIMO3_SWITCH_ANTENNA1: | |
2011 | case IWL_MIMO3_SWITCH_ANTENNA2: | |
2012 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); | |
2013 | ||
2014 | if (tx_chains_num <= 3) | |
2015 | break; | |
2016 | ||
2017 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
2018 | break; | |
2019 | ||
2020 | memcpy(search_tbl, tbl, sz); | |
2021 | if (rs_toggle_antenna(valid_tx_ant, | |
2022 | &search_tbl->current_rate, search_tbl)) | |
2023 | goto out; | |
2024 | break; | |
2025 | case IWL_MIMO3_SWITCH_SISO_A: | |
2026 | case IWL_MIMO3_SWITCH_SISO_B: | |
2027 | case IWL_MIMO3_SWITCH_SISO_C: | |
2028 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); | |
2029 | ||
2030 | /* Set up new search table for SISO */ | |
2031 | memcpy(search_tbl, tbl, sz); | |
2032 | ||
2033 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) | |
2034 | search_tbl->ant_type = ANT_A; | |
2035 | else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) | |
2036 | search_tbl->ant_type = ANT_B; | |
2037 | else | |
2038 | search_tbl->ant_type = ANT_C; | |
2039 | ||
2040 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
2041 | break; | |
2042 | ||
2043 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, | |
2044 | search_tbl, index); | |
2045 | if (!ret) | |
2046 | goto out; | |
2047 | ||
2048 | break; | |
2049 | ||
2050 | case IWL_MIMO3_SWITCH_MIMO2_AB: | |
2051 | case IWL_MIMO3_SWITCH_MIMO2_AC: | |
2052 | case IWL_MIMO3_SWITCH_MIMO2_BC: | |
2053 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); | |
2054 | ||
2055 | memcpy(search_tbl, tbl, sz); | |
2056 | search_tbl->is_SGI = 0; | |
2057 | if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) | |
2058 | search_tbl->ant_type = ANT_AB; | |
2059 | else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) | |
2060 | search_tbl->ant_type = ANT_AC; | |
2061 | else | |
2062 | search_tbl->ant_type = ANT_BC; | |
2063 | ||
2064 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
2065 | break; | |
2066 | ||
2067 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
2068 | search_tbl, index); | |
2069 | if (!ret) | |
2070 | goto out; | |
2071 | ||
2072 | break; | |
2073 | ||
2074 | case IWL_MIMO3_SWITCH_GI: | |
28e6f489 DH |
2075 | if (!tbl->is_ht40 && !(ht_cap->cap & |
2076 | IEEE80211_HT_CAP_SGI_20)) | |
584a0f00 | 2077 | break; |
28e6f489 DH |
2078 | if (tbl->is_ht40 && !(ht_cap->cap & |
2079 | IEEE80211_HT_CAP_SGI_40)) | |
584a0f00 WYG |
2080 | break; |
2081 | ||
2082 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); | |
2083 | ||
2084 | /* Set up new search table for MIMO */ | |
2085 | memcpy(search_tbl, tbl, sz); | |
2086 | search_tbl->is_SGI = !tbl->is_SGI; | |
2087 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
2088 | /* | |
2089 | * If active table already uses the fastest possible | |
2090 | * modulation (dual stream with short guard interval), | |
2091 | * and it's working well, there's no need to look | |
2092 | * for a better type of modulation! | |
2093 | */ | |
2094 | if (tbl->is_SGI) { | |
2095 | s32 tpt = lq_sta->last_tpt / 100; | |
2096 | if (tpt >= search_tbl->expected_tpt[index]) | |
2097 | break; | |
2098 | } | |
2099 | search_tbl->current_rate = | |
2100 | rate_n_flags_from_tbl(priv, search_tbl, | |
2101 | index, is_green); | |
d6e93399 | 2102 | update_search_tbl_counter = 1; |
584a0f00 WYG |
2103 | goto out; |
2104 | } | |
2105 | tbl->action++; | |
2106 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
2107 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
2108 | ||
2109 | if (tbl->action == start_action) | |
2110 | break; | |
2111 | } | |
2112 | search_tbl->lq_type = LQ_NONE; | |
2113 | return 0; | |
2114 | out: | |
2115 | lq_sta->search_better_tbl = 1; | |
2116 | tbl->action++; | |
2117 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
2118 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
d6e93399 MA |
2119 | if (update_search_tbl_counter) |
2120 | search_tbl->action = tbl->action; | |
2121 | ||
584a0f00 WYG |
2122 | return 0; |
2123 | ||
2124 | } | |
2125 | ||
77626355 BC |
2126 | /* |
2127 | * Check whether we should continue using same modulation mode, or | |
2128 | * begin search for a new mode, based on: | |
2129 | * 1) # tx successes or failures while using this mode | |
2130 | * 2) # times calling this function | |
2131 | * 3) elapsed time in this mode (not used, for now) | |
2132 | */ | |
da5dbb97 | 2133 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) |
b481de9c | 2134 | { |
e227ceac | 2135 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
2136 | int i; |
2137 | int active_tbl; | |
2138 | int flush_interval_passed = 0; | |
bf403db8 | 2139 | struct iwl_priv *priv; |
b481de9c | 2140 | |
bf403db8 | 2141 | priv = lq_sta->drv; |
c33104f0 | 2142 | active_tbl = lq_sta->active_tbl; |
b481de9c | 2143 | |
c33104f0 | 2144 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 2145 | |
77626355 | 2146 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 2147 | if (lq_sta->stay_in_tbl) { |
b481de9c | 2148 | |
77626355 | 2149 | /* Elapsed time using current modulation mode */ |
c33104f0 | 2150 | if (lq_sta->flush_timer) |
b481de9c | 2151 | flush_interval_passed = |
447fee70 MA |
2152 | time_after(jiffies, |
2153 | (unsigned long)(lq_sta->flush_timer + | |
b481de9c ZY |
2154 | IWL_RATE_SCALE_FLUSH_INTVL)); |
2155 | ||
77626355 BC |
2156 | /* |
2157 | * Check if we should allow search for new modulation mode. | |
2158 | * If many frames have failed or succeeded, or we've used | |
2159 | * this same modulation for a long time, allow search, and | |
2160 | * reset history stats that keep track of whether we should | |
2161 | * allow a new search. Also (below) reset all bitmaps and | |
2162 | * stats in active history. | |
2163 | */ | |
da5dbb97 WYG |
2164 | if (force_search || |
2165 | (lq_sta->total_failed > lq_sta->max_failure_limit) || | |
c33104f0 TW |
2166 | (lq_sta->total_success > lq_sta->max_success_limit) || |
2167 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 2168 | && (flush_interval_passed))) { |
0ca24daf | 2169 | IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n", |
c33104f0 TW |
2170 | lq_sta->total_failed, |
2171 | lq_sta->total_success, | |
b481de9c | 2172 | flush_interval_passed); |
77626355 BC |
2173 | |
2174 | /* Allow search for new mode */ | |
c33104f0 TW |
2175 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
2176 | lq_sta->total_failed = 0; | |
2177 | lq_sta->total_success = 0; | |
2178 | lq_sta->flush_timer = 0; | |
77626355 BC |
2179 | |
2180 | /* | |
2181 | * Else if we've used this modulation mode enough repetitions | |
2182 | * (regardless of elapsed time or success/failure), reset | |
2183 | * history bitmaps and rate-specific stats for all rates in | |
2184 | * active table. | |
2185 | */ | |
403ab56b | 2186 | } else { |
c33104f0 TW |
2187 | lq_sta->table_count++; |
2188 | if (lq_sta->table_count >= | |
2189 | lq_sta->table_count_limit) { | |
2190 | lq_sta->table_count = 0; | |
b481de9c | 2191 | |
e1623446 | 2192 | IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
b481de9c ZY |
2193 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2194 | rs_rate_scale_clear_window( | |
2195 | &(tbl->win[i])); | |
2196 | } | |
2197 | } | |
2198 | ||
77626355 BC |
2199 | /* If transitioning to allow "search", reset all history |
2200 | * bitmaps and stats in active table (this will become the new | |
2201 | * "search" table). */ | |
c33104f0 | 2202 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
2203 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2204 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2205 | } | |
2206 | } | |
2207 | } | |
2208 | ||
e3139fe7 WYG |
2209 | /* |
2210 | * setup rate table in uCode | |
e3139fe7 | 2211 | */ |
70817b5e JB |
2212 | static void rs_update_rate_tbl(struct iwl_priv *priv, |
2213 | struct iwl_rxon_context *ctx, | |
2214 | struct iwl_lq_sta *lq_sta, | |
2215 | struct iwl_scale_tbl_info *tbl, | |
2216 | int index, u8 is_green) | |
e3139fe7 WYG |
2217 | { |
2218 | u32 rate; | |
2219 | ||
2220 | /* Update uCode's rate table. */ | |
2221 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); | |
2222 | rs_fill_link_cmd(priv, lq_sta, rate); | |
7e6a5886 | 2223 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
e3139fe7 WYG |
2224 | } |
2225 | ||
77626355 BC |
2226 | /* |
2227 | * Do rate scaling and search for new modulation mode. | |
2228 | */ | |
c79dd5b5 | 2229 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 2230 | struct sk_buff *skb, |
4b7679a5 JB |
2231 | struct ieee80211_sta *sta, |
2232 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2233 | { |
4b7679a5 | 2234 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 2235 | struct ieee80211_conf *conf = &hw->conf; |
514d65c1 GS |
2236 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2237 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
b481de9c ZY |
2238 | int low = IWL_RATE_INVALID; |
2239 | int high = IWL_RATE_INVALID; | |
2240 | int index; | |
2241 | int i; | |
e227ceac | 2242 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
2243 | int current_tpt = IWL_INVALID_VALUE; |
2244 | int low_tpt = IWL_INVALID_VALUE; | |
2245 | int high_tpt = IWL_INVALID_VALUE; | |
2246 | u32 fail_count; | |
2247 | s8 scale_action = 0; | |
fd7c8a40 | 2248 | u16 rate_mask; |
b481de9c | 2249 | u8 update_lq = 0; |
e227ceac | 2250 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 2251 | u16 rate_scale_index_msk = 0; |
b481de9c ZY |
2252 | u8 is_green = 0; |
2253 | u8 active_tbl = 0; | |
2254 | u8 done_search = 0; | |
2255 | u16 high_low; | |
a5e8b505 | 2256 | s32 sr; |
5f85a789 | 2257 | u8 tid = IWL_MAX_TID_COUNT; |
86b4766b | 2258 | struct iwl_tid_data *tid_data; |
7e6a5886 | 2259 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 2260 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
b481de9c | 2261 | |
e1623446 | 2262 | IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2263 | |
514d65c1 | 2264 | /* Send management frames and NO_ACK data using lowest rate. */ |
417f114b TW |
2265 | /* TODO: this could probably be improved.. */ |
2266 | if (!ieee80211_is_data(hdr->frame_control) || | |
514d65c1 | 2267 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c | 2268 | return; |
b481de9c | 2269 | |
4b7679a5 | 2270 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 2271 | |
faa29718 | 2272 | tid = rs_tl_add_packet(lq_sta, hdr); |
5f85a789 EG |
2273 | if ((tid != IWL_MAX_TID_COUNT) && |
2274 | (lq_sta->tx_agg_tid_en & (1 << tid))) { | |
04cf6824 | 2275 | tid_data = &priv->tid_data[lq_sta->lq.sta_id][tid]; |
e3949d62 DH |
2276 | if (tid_data->agg.state == IWL_AGG_OFF) |
2277 | lq_sta->is_agg = 0; | |
2278 | else | |
2279 | lq_sta->is_agg = 1; | |
2280 | } else | |
2281 | lq_sta->is_agg = 0; | |
faa29718 | 2282 | |
77626355 BC |
2283 | /* |
2284 | * Select rate-scale / modulation-mode table to work with in | |
2285 | * the rest of this function: "search" if searching for better | |
2286 | * modulation mode, or "active" if doing rate scaling within a mode. | |
2287 | */ | |
c33104f0 TW |
2288 | if (!lq_sta->search_better_tbl) |
2289 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2290 | else |
c33104f0 | 2291 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2292 | |
c33104f0 | 2293 | tbl = &(lq_sta->lq_info[active_tbl]); |
2681b20b WYG |
2294 | if (is_legacy(tbl->lq_type)) |
2295 | lq_sta->is_green = 0; | |
2296 | else | |
7e6a5886 | 2297 | lq_sta->is_green = rs_use_green(sta); |
c33104f0 | 2298 | is_green = lq_sta->is_green; |
b481de9c | 2299 | |
77626355 | 2300 | /* current tx rate */ |
b7e35008 | 2301 | index = lq_sta->last_txrate_idx; |
b481de9c | 2302 | |
e1623446 | 2303 | IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
b481de9c ZY |
2304 | tbl->lq_type); |
2305 | ||
77626355 | 2306 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 2307 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c | 2308 | |
91dd6c27 | 2309 | IWL_DEBUG_RATE(priv, "mask 0x%04X\n", rate_mask); |
b481de9c ZY |
2310 | |
2311 | /* mask with station rate restriction */ | |
2312 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 2313 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 2314 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 2315 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 2316 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
2317 | else |
2318 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 2319 | lq_sta->supp_rates); |
b481de9c ZY |
2320 | |
2321 | } else | |
2322 | rate_scale_index_msk = rate_mask; | |
2323 | ||
2324 | if (!rate_scale_index_msk) | |
2325 | rate_scale_index_msk = rate_mask; | |
2326 | ||
07bc28ed | 2327 | if (!((1 << index) & rate_scale_index_msk)) { |
15b1687c | 2328 | IWL_ERR(priv, "Current Rate is not valid\n"); |
e3139fe7 WYG |
2329 | if (lq_sta->search_better_tbl) { |
2330 | /* revert to active table if search table is not valid*/ | |
2331 | tbl->lq_type = LQ_NONE; | |
2332 | lq_sta->search_better_tbl = 0; | |
2333 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2334 | /* get "active" rate info */ | |
2335 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); | |
70817b5e JB |
2336 | rs_update_rate_tbl(priv, ctx, lq_sta, tbl, |
2337 | index, is_green); | |
e3139fe7 | 2338 | } |
07bc28ed | 2339 | return; |
b481de9c ZY |
2340 | } |
2341 | ||
77626355 | 2342 | /* Get expected throughput table and history window for current rate */ |
07bc28ed | 2343 | if (!tbl->expected_tpt) { |
15b1687c | 2344 | IWL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
07bc28ed GC |
2345 | return; |
2346 | } | |
b481de9c | 2347 | |
c6ec7a9b AM |
2348 | /* force user max rate if set by user */ |
2349 | if ((lq_sta->max_rate_idx != -1) && | |
2350 | (lq_sta->max_rate_idx < index)) { | |
2351 | index = lq_sta->max_rate_idx; | |
2352 | update_lq = 1; | |
2353 | window = &(tbl->win[index]); | |
2354 | goto lq_update; | |
2355 | } | |
2356 | ||
b481de9c ZY |
2357 | window = &(tbl->win[index]); |
2358 | ||
77626355 BC |
2359 | /* |
2360 | * If there is not enough history to calculate actual average | |
2361 | * throughput, keep analyzing results of more tx frames, without | |
2362 | * changing rate or mode (bypass most of the rest of this function). | |
2363 | * Set up new rate table in uCode only if old rate is not supported | |
2364 | * in current association (use new rate found above). | |
2365 | */ | |
b481de9c | 2366 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
2367 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
2368 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
e1623446 | 2369 | IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
b481de9c ZY |
2370 | "for index %d\n", |
2371 | window->success_counter, window->counter, index); | |
77626355 BC |
2372 | |
2373 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 2374 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
2375 | |
2376 | /* Should we stay with this modulation mode, | |
2377 | * or search for a new one? */ | |
da5dbb97 | 2378 | rs_stay_in_table(lq_sta, false); |
77626355 | 2379 | |
b481de9c | 2380 | goto out; |
3110bef7 | 2381 | } |
77626355 BC |
2382 | /* Else we have enough samples; calculate estimate of |
2383 | * actual average throughput */ | |
3d79b2a9 RC |
2384 | if (window->average_tpt != ((window->success_ratio * |
2385 | tbl->expected_tpt[index] + 64) / 128)) { | |
2386 | IWL_ERR(priv, "expected_tpt should have been calculated by now\n"); | |
2387 | window->average_tpt = ((window->success_ratio * | |
2388 | tbl->expected_tpt[index] + 64) / 128); | |
2389 | } | |
b481de9c | 2390 | |
77626355 | 2391 | /* If we are searching for better modulation mode, check success. */ |
46f9381a | 2392 | if (lq_sta->search_better_tbl && |
3ad3b92a | 2393 | (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) { |
77626355 BC |
2394 | /* If good success, continue using the "search" mode; |
2395 | * no need to send new link quality command, since we're | |
2396 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
2397 | if (window->average_tpt > lq_sta->last_tpt) { |
2398 | ||
e1623446 | 2399 | IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
2400 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2401 | window->success_ratio, | |
2402 | window->average_tpt, | |
2403 | lq_sta->last_tpt); | |
2404 | ||
2405 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 2406 | lq_sta->enable_counter = 1; |
07bc28ed | 2407 | |
77626355 | 2408 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 2409 | lq_sta->active_tbl = active_tbl; |
b481de9c | 2410 | current_tpt = window->average_tpt; |
77626355 BC |
2411 | |
2412 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 2413 | } else { |
07bc28ed | 2414 | |
e1623446 | 2415 | IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
07bc28ed GC |
2416 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2417 | window->success_ratio, | |
2418 | window->average_tpt, | |
2419 | lq_sta->last_tpt); | |
2420 | ||
77626355 | 2421 | /* Nullify "search" table */ |
b481de9c | 2422 | tbl->lq_type = LQ_NONE; |
77626355 BC |
2423 | |
2424 | /* Revert to "active" table */ | |
c33104f0 TW |
2425 | active_tbl = lq_sta->active_tbl; |
2426 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 2427 | |
77626355 | 2428 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 2429 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 2430 | current_tpt = lq_sta->last_tpt; |
b481de9c | 2431 | |
77626355 | 2432 | /* Need to set up a new rate table in uCode */ |
b481de9c | 2433 | update_lq = 1; |
b481de9c | 2434 | } |
77626355 BC |
2435 | |
2436 | /* Either way, we've made a decision; modulation mode | |
2437 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 2438 | lq_sta->search_better_tbl = 0; |
77626355 | 2439 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
2440 | goto lq_update; |
2441 | } | |
2442 | ||
77626355 BC |
2443 | /* (Else) not in search of better modulation mode, try for better |
2444 | * starting rate, while staying in this mode. */ | |
bf403db8 | 2445 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
2446 | tbl->lq_type); |
2447 | low = high_low & 0xff; | |
2448 | high = (high_low >> 8) & 0xff; | |
2449 | ||
c6ec7a9b AM |
2450 | /* If user set max rate, dont allow higher than user constrain */ |
2451 | if ((lq_sta->max_rate_idx != -1) && | |
2452 | (lq_sta->max_rate_idx < high)) | |
2453 | high = IWL_RATE_INVALID; | |
2454 | ||
a5e8b505 GC |
2455 | sr = window->success_ratio; |
2456 | ||
77626355 | 2457 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 2458 | current_tpt = window->average_tpt; |
b481de9c ZY |
2459 | if (low != IWL_RATE_INVALID) |
2460 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
2461 | if (high != IWL_RATE_INVALID) |
2462 | high_tpt = tbl->win[high].average_tpt; | |
2463 | ||
a5e8b505 | 2464 | scale_action = 0; |
b481de9c | 2465 | |
77626355 | 2466 | /* Too many failures, decrease rate */ |
a5e8b505 | 2467 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
e1623446 | 2468 | IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
b481de9c | 2469 | scale_action = -1; |
77626355 BC |
2470 | |
2471 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 2472 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
2473 | (high_tpt == IWL_INVALID_VALUE)) { |
2474 | ||
2475 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
2476 | scale_action = 1; | |
2477 | else if (low != IWL_RATE_INVALID) | |
8fe72311 | 2478 | scale_action = 0; |
a5e8b505 | 2479 | } |
77626355 BC |
2480 | |
2481 | /* Both adjacent throughputs are measured, but neither one has better | |
2482 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
2483 | else if ((low_tpt != IWL_INVALID_VALUE) && |
2484 | (high_tpt != IWL_INVALID_VALUE) && | |
2485 | (low_tpt < current_tpt) && | |
2486 | (high_tpt < current_tpt)) | |
2487 | scale_action = 0; | |
77626355 BC |
2488 | |
2489 | /* At least one adjacent rate's throughput is measured, | |
2490 | * and may have better performance. */ | |
b481de9c | 2491 | else { |
77626355 | 2492 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 2493 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 2494 | /* Higher rate has better throughput */ |
a5e8b505 GC |
2495 | if (high_tpt > current_tpt && |
2496 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 2497 | scale_action = 1; |
a5e8b505 | 2498 | } else { |
8fe72311 | 2499 | scale_action = 0; |
b481de9c | 2500 | } |
77626355 BC |
2501 | |
2502 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 2503 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 2504 | /* Lower rate has better throughput */ |
b481de9c | 2505 | if (low_tpt > current_tpt) { |
e1623446 TW |
2506 | IWL_DEBUG_RATE(priv, |
2507 | "decrease rate because of low tpt\n"); | |
b481de9c | 2508 | scale_action = -1; |
a5e8b505 | 2509 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 2510 | scale_action = 1; |
a5e8b505 | 2511 | } |
b481de9c ZY |
2512 | } |
2513 | } | |
2514 | ||
77626355 BC |
2515 | /* Sanity check; asked for decrease, but success rate or throughput |
2516 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
2517 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
2518 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 2519 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c | 2520 | scale_action = 0; |
46f9381a WYG |
2521 | if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type)) |
2522 | scale_action = -1; | |
3ad3b92a | 2523 | if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI && |
46f9381a WYG |
2524 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) |
2525 | scale_action = -1; | |
290f599c | 2526 | |
da5dbb97 WYG |
2527 | if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) && |
2528 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) { | |
2529 | if (lq_sta->last_bt_traffic > priv->bt_traffic_load) { | |
2530 | /* | |
2531 | * don't set scale_action, don't want to scale up if | |
2532 | * the rate scale doesn't otherwise think that is a | |
2533 | * good idea. | |
2534 | */ | |
2535 | } else if (lq_sta->last_bt_traffic <= priv->bt_traffic_load) { | |
2536 | scale_action = -1; | |
2537 | } | |
2538 | } | |
2539 | lq_sta->last_bt_traffic = priv->bt_traffic_load; | |
2540 | ||
2541 | if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) && | |
2542 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) { | |
2543 | /* search for a new modulation */ | |
2544 | rs_stay_in_table(lq_sta, true); | |
2545 | goto lq_update; | |
290f599c JB |
2546 | } |
2547 | ||
b481de9c ZY |
2548 | switch (scale_action) { |
2549 | case -1: | |
77626355 | 2550 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
2551 | if (low != IWL_RATE_INVALID) { |
2552 | update_lq = 1; | |
2553 | index = low; | |
2554 | } | |
447fee70 | 2555 | |
b481de9c ZY |
2556 | break; |
2557 | case 1: | |
77626355 | 2558 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
2559 | if (high != IWL_RATE_INVALID) { |
2560 | update_lq = 1; | |
2561 | index = high; | |
2562 | } | |
2563 | ||
2564 | break; | |
2565 | case 0: | |
77626355 | 2566 | /* No change */ |
b481de9c ZY |
2567 | default: |
2568 | break; | |
2569 | } | |
2570 | ||
e1623446 | 2571 | IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
b481de9c ZY |
2572 | "high %d type %d\n", |
2573 | index, scale_action, low, high, tbl->lq_type); | |
2574 | ||
a5e8b505 | 2575 | lq_update: |
77626355 | 2576 | /* Replace uCode's rate table for the destination station. */ |
e3139fe7 | 2577 | if (update_lq) |
70817b5e | 2578 | rs_update_rate_tbl(priv, ctx, lq_sta, tbl, index, is_green); |
77626355 | 2579 | |
3ad3b92a | 2580 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) { |
46f9381a WYG |
2581 | /* Should we stay with this modulation mode, |
2582 | * or search for a new one? */ | |
da5dbb97 | 2583 | rs_stay_in_table(lq_sta, false); |
46f9381a | 2584 | } |
77626355 BC |
2585 | /* |
2586 | * Search for new modulation mode if we're: | |
2587 | * 1) Not changing rates right now | |
2588 | * 2) Not just finishing up a search | |
2589 | * 3) Allowing a new search | |
2590 | */ | |
47cfd463 | 2591 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 2592 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 2593 | lq_sta->last_tpt = current_tpt; |
b481de9c | 2594 | |
77626355 BC |
2595 | /* Select a new "search" modulation mode to try. |
2596 | * If one is found, set up the new "search" table. */ | |
b481de9c | 2597 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 2598 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2599 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 2600 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
584a0f00 WYG |
2601 | else if (is_mimo2(tbl->lq_type)) |
2602 | rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); | |
b481de9c | 2603 | else |
584a0f00 | 2604 | rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2605 | |
77626355 | 2606 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2607 | if (lq_sta->search_better_tbl) { |
77626355 | 2608 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2609 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2610 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2611 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2612 | ||
77626355 | 2613 | /* Use new "search" start rate */ |
e7d326ac | 2614 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2615 | |
e1623446 | 2616 | IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
39e88504 | 2617 | tbl->current_rate, index); |
07bc28ed | 2618 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
7e6a5886 | 2619 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
447fee70 MA |
2620 | } else |
2621 | done_search = 1; | |
2622 | } | |
b481de9c | 2623 | |
447fee70 | 2624 | if (done_search && !lq_sta->stay_in_tbl) { |
77626355 BC |
2625 | /* If the "active" (non-search) mode was legacy, |
2626 | * and we've tried switching antennas, | |
2627 | * but we haven't been able to try HT modes (not available), | |
2628 | * stay with best antenna legacy modulation for a while | |
2629 | * before next round of mode comparisons. */ | |
c33104f0 | 2630 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
de27e64e | 2631 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && |
d6e93399 | 2632 | lq_sta->action_counter > tbl1->max_search) { |
e1623446 | 2633 | IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
bf403db8 | 2634 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2635 | } |
2636 | ||
77626355 BC |
2637 | /* If we're in an HT mode, and all 3 mode switch actions |
2638 | * have been tried and compared, stay in this best modulation | |
2639 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 | 2640 | if (lq_sta->enable_counter && |
46f9381a WYG |
2641 | (lq_sta->action_counter >= tbl1->max_search) && |
2642 | iwl_ht_enabled(priv)) { | |
0c11b4de RR |
2643 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2644 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
5f85a789 EG |
2645 | (tid != IWL_MAX_TID_COUNT)) { |
2646 | u8 sta_id = lq_sta->lq.sta_id; | |
04cf6824 | 2647 | tid_data = &priv->tid_data[sta_id][tid]; |
86b4766b WYG |
2648 | if (tid_data->agg.state == IWL_AGG_OFF) { |
2649 | IWL_DEBUG_RATE(priv, | |
2650 | "try to aggregate tid %d\n", | |
2651 | tid); | |
2652 | rs_tl_turn_on_agg(priv, tid, | |
2653 | lq_sta, sta); | |
2654 | } | |
b481de9c | 2655 | } |
bf403db8 | 2656 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2657 | } |
b481de9c ZY |
2658 | } |
2659 | ||
2660 | out: | |
978785a3 | 2661 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
c3322b30 | 2662 | lq_sta->last_txrate_idx = index; |
b481de9c ZY |
2663 | } |
2664 | ||
fe6b23dd RC |
2665 | /** |
2666 | * rs_initialize_lq - Initialize a station's hardware rate table | |
2667 | * | |
2668 | * The uCode's station table contains a table of fallback rates | |
2669 | * for automatic fallback during transmission. | |
2670 | * | |
2671 | * NOTE: This sets up a default set of values. These will be replaced later | |
2672 | * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of | |
2673 | * rc80211_simple. | |
2674 | * | |
2675 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2676 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2677 | * which requires station table entry to exist). | |
2678 | */ | |
c79dd5b5 | 2679 | static void rs_initialize_lq(struct iwl_priv *priv, |
4b7679a5 JB |
2680 | struct ieee80211_sta *sta, |
2681 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2682 | { |
e227ceac | 2683 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2684 | int rate_idx; |
aade00ce | 2685 | int i; |
39e88504 | 2686 | u32 rate; |
7e6a5886 | 2687 | u8 use_green = rs_use_green(sta); |
aade00ce GC |
2688 | u8 active_tbl = 0; |
2689 | u8 valid_tx_ant; | |
7e6a5886 JB |
2690 | struct iwl_station_priv *sta_priv; |
2691 | struct iwl_rxon_context *ctx; | |
b481de9c | 2692 | |
4b7679a5 | 2693 | if (!sta || !lq_sta) |
7e6a5886 JB |
2694 | return; |
2695 | ||
2696 | sta_priv = (void *)sta->drv_priv; | |
c6892906 | 2697 | ctx = sta_priv->ctx; |
b481de9c | 2698 | |
b7e35008 | 2699 | i = lq_sta->last_txrate_idx; |
b481de9c | 2700 | |
9e295116 | 2701 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
aade00ce | 2702 | |
c33104f0 TW |
2703 | if (!lq_sta->search_better_tbl) |
2704 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2705 | else |
c33104f0 | 2706 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2707 | |
c33104f0 | 2708 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2709 | |
2710 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2711 | i = 0; | |
2712 | ||
1826dcc0 | 2713 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2714 | tbl->ant_type = first_antenna(valid_tx_ant); |
2715 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2716 | |
2717 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2718 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2719 | |
39e88504 | 2720 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2721 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2722 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2723 | |
978785a3 | 2724 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2725 | tbl->current_rate = rate; |
eecd6e57 | 2726 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2727 | rs_fill_link_cmd(NULL, lq_sta, rate); |
fe6b23dd | 2728 | priv->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
7e6a5886 | 2729 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_SYNC, true); |
b481de9c ZY |
2730 | } |
2731 | ||
e6a9854b JB |
2732 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2733 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2734 | { |
2735 | ||
e6a9854b JB |
2736 | struct sk_buff *skb = txrc->skb; |
2737 | struct ieee80211_supported_band *sband = txrc->sband; | |
d0f76d68 EG |
2738 | struct iwl_op_mode *op_mode __maybe_unused = |
2739 | (struct iwl_op_mode *)priv_r; | |
2740 | struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode); | |
e6a9854b | 2741 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2742 | struct iwl_lq_sta *lq_sta = priv_sta; |
2743 | int rate_idx; | |
b481de9c | 2744 | |
e1623446 | 2745 | IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2746 | |
c6ec7a9b AM |
2747 | /* Get max rate if user set max rate */ |
2748 | if (lq_sta) { | |
2749 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2750 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2751 | (lq_sta->max_rate_idx != -1)) | |
2752 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2753 | if ((lq_sta->max_rate_idx < 0) || | |
2754 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2755 | lq_sta->max_rate_idx = -1; | |
2756 | } | |
2757 | ||
fe6b23dd RC |
2758 | /* Treat uninitialized rate scaling data same as non-existing. */ |
2759 | if (lq_sta && !lq_sta->drv) { | |
2760 | IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); | |
2761 | priv_sta = NULL; | |
2762 | } | |
2763 | ||
514d65c1 | 2764 | /* Send management frames and NO_ACK data using lowest rate. */ |
4c6d4f5c | 2765 | if (rate_control_send_low(sta, priv_sta, txrc)) |
4b7679a5 | 2766 | return; |
b481de9c | 2767 | |
417f114b | 2768 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2769 | |
a9c146b3 | 2770 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { |
417f114b | 2771 | rate_idx -= IWL_FIRST_OFDM_RATE; |
a9c146b3 WYG |
2772 | /* 6M and 9M shared same MCS index */ |
2773 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; | |
2774 | if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2775 | IWL_RATE_MIMO3_6M_PLCP) | |
2776 | rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM); | |
2777 | else if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2778 | IWL_RATE_MIMO2_6M_PLCP) | |
2779 | rate_idx = rate_idx + MCS_INDEX_PER_STREAM; | |
2780 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; | |
2781 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2782 | info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI; | |
2783 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) | |
2784 | info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA; | |
7aafef1c | 2785 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
a9c146b3 WYG |
2786 | info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2787 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) | |
2788 | info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
2789 | } else { | |
5027309b DH |
2790 | /* Check for invalid rates */ |
2791 | if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) || | |
2792 | ((sband->band == IEEE80211_BAND_5GHZ) && | |
2793 | (rate_idx < IWL_FIRST_OFDM_RATE))) | |
a9c146b3 | 2794 | rate_idx = rate_lowest_index(sband, sta); |
5027309b | 2795 | /* On valid 5 GHz rate, adjust index */ |
a9c146b3 WYG |
2796 | else if (sband->band == IEEE80211_BAND_5GHZ) |
2797 | rate_idx -= IWL_FIRST_OFDM_RATE; | |
7ebaeff8 | 2798 | info->control.rates[0].flags = 0; |
a9c146b3 | 2799 | } |
417f114b | 2800 | info->control.rates[0].idx = rate_idx; |
a9c146b3 | 2801 | |
b481de9c ZY |
2802 | } |
2803 | ||
4b7679a5 JB |
2804 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2805 | gfp_t gfp) | |
b481de9c | 2806 | { |
8d9698b3 | 2807 | struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv; |
d0f76d68 EG |
2808 | struct iwl_op_mode *op_mode __maybe_unused = |
2809 | (struct iwl_op_mode *)priv_rate; | |
2810 | struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode); | |
b481de9c | 2811 | |
e1623446 | 2812 | IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
b481de9c | 2813 | |
08960dea | 2814 | return &sta_priv->lq_sta; |
b481de9c ZY |
2815 | } |
2816 | ||
fe6b23dd RC |
2817 | /* |
2818 | * Called after adding a new station to initialize rate scaling | |
2819 | */ | |
2820 | void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_id) | |
b481de9c ZY |
2821 | { |
2822 | int i, j; | |
fe6b23dd | 2823 | struct ieee80211_hw *hw = priv->hw; |
4b7679a5 | 2824 | struct ieee80211_conf *conf = &priv->hw->conf; |
7869b0ea | 2825 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
fe6b23dd RC |
2826 | struct iwl_station_priv *sta_priv; |
2827 | struct iwl_lq_sta *lq_sta; | |
2828 | struct ieee80211_supported_band *sband; | |
3ac40eda | 2829 | unsigned long supp; /* must be unsigned long for for_each_set_bit */ |
fe6b23dd RC |
2830 | |
2831 | sta_priv = (struct iwl_station_priv *) sta->drv_priv; | |
2832 | lq_sta = &sta_priv->lq_sta; | |
2833 | sband = hw->wiphy->bands[conf->channel->band]; | |
b481de9c | 2834 | |
fe6b23dd RC |
2835 | |
2836 | lq_sta->lq.sta_id = sta_id; | |
5ad13f8c RC |
2837 | |
2838 | for (j = 0; j < LQ_SIZE; j++) | |
2839 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
2840 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); | |
2841 | ||
c33104f0 | 2842 | lq_sta->flush_timer = 0; |
4b7679a5 | 2843 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2844 | for (j = 0; j < LQ_SIZE; j++) |
2845 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2846 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2847 | |
fe6b23dd RC |
2848 | IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init for station %d ***\n", |
2849 | sta_id); | |
b481de9c ZY |
2850 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2851 | * the lowest or the highest rate.. Could consider using RSSI from | |
2852 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2853 | * after assoc.. */ | |
2854 | ||
c33104f0 | 2855 | lq_sta->is_dup = 0; |
c6ec7a9b | 2856 | lq_sta->max_rate_idx = -1; |
7d049e5a | 2857 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; |
7e6a5886 | 2858 | lq_sta->is_green = rs_use_green(sta); |
3ac40eda JB |
2859 | lq_sta->band = sband->band; |
2860 | /* | |
2861 | * active legacy rates as per supported rates bitmap | |
2862 | */ | |
2863 | supp = sta->supp_rates[sband->band]; | |
2864 | lq_sta->active_legacy_rate = 0; | |
2865 | for_each_set_bit(i, &supp, BITS_PER_LONG) | |
2866 | lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value); | |
2867 | ||
77626355 BC |
2868 | /* |
2869 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2870 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2871 | */ | |
7869b0ea DH |
2872 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; |
2873 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2874 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2875 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2876 | |
77626355 | 2877 | /* Same here */ |
7869b0ea DH |
2878 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; |
2879 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2880 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2881 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2882 | ||
7869b0ea DH |
2883 | lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1; |
2884 | lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2885 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2886 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2887 | ||
e1623446 | 2888 | IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2889 | lq_sta->active_siso_rate, |
fde0db31 GC |
2890 | lq_sta->active_mimo2_rate, |
2891 | lq_sta->active_mimo3_rate); | |
2892 | ||
a96a27f9 | 2893 | /* These values will be overridden later */ |
3a23d695 | 2894 | lq_sta->lq.general_params.single_stream_ant_msk = |
9e295116 | 2895 | first_antenna(priv->hw_params.valid_tx_ant); |
3a23d695 | 2896 | lq_sta->lq.general_params.dual_stream_ant_msk = |
9e295116 JB |
2897 | priv->hw_params.valid_tx_ant & |
2898 | ~first_antenna(priv->hw_params.valid_tx_ant); | |
3a23d695 WYG |
2899 | if (!lq_sta->lq.general_params.dual_stream_ant_msk) { |
2900 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
9e295116 | 2901 | } else if (num_of_ant(priv->hw_params.valid_tx_ant) == 2) { |
3a23d695 | 2902 | lq_sta->lq.general_params.dual_stream_ant_msk = |
9e295116 | 2903 | priv->hw_params.valid_tx_ant; |
3a23d695 | 2904 | } |
07bc28ed | 2905 | |
0c11b4de RR |
2906 | /* as default allow aggregation for all tids */ |
2907 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2908 | lq_sta->drv = priv; |
b481de9c | 2909 | |
5027309b DH |
2910 | /* Set last_txrate_idx to lowest rate */ |
2911 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2912 | if (sband->band == IEEE80211_BAND_5GHZ) | |
2913 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
e3949d62 | 2914 | lq_sta->is_agg = 0; |
5ef15ccc | 2915 | #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE |
4e308119 | 2916 | priv->tm_fixed_rate = 0; |
c10e2c10 | 2917 | #endif |
7d5f01ad | 2918 | #ifdef CONFIG_MAC80211_DEBUGFS |
a1da077b | 2919 | lq_sta->dbg_fixed_rate = 0; |
7d5f01ad | 2920 | #endif |
a1da077b | 2921 | |
9b6ca448 | 2922 | rs_initialize_lq(priv, sta, lq_sta); |
b481de9c ZY |
2923 | } |
2924 | ||
46f9381a | 2925 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 2926 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2927 | { |
e227ceac | 2928 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2929 | int index = 0; |
b481de9c | 2930 | int rate_idx; |
1b696de2 | 2931 | int repeat_rate = 0; |
aade00ce | 2932 | u8 ant_toggle_cnt = 0; |
b481de9c | 2933 | u8 use_ht_possible = 1; |
aade00ce | 2934 | u8 valid_tx_ant = 0; |
7b090687 JB |
2935 | struct iwl_station_priv *sta_priv = |
2936 | container_of(lq_sta, struct iwl_station_priv, lq_sta); | |
07bc28ed | 2937 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2938 | |
77626355 | 2939 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2940 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2941 | |
39e88504 GC |
2942 | /* Interpret new_rate (rate_n_flags) */ |
2943 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, | |
b481de9c ZY |
2944 | &tbl_type, &rate_idx); |
2945 | ||
da5dbb97 WYG |
2946 | if (priv && priv->bt_full_concurrent) { |
2947 | /* 1x1 only */ | |
2948 | tbl_type.ant_type = | |
9e295116 | 2949 | first_antenna(priv->hw_params.valid_tx_ant); |
da5dbb97 WYG |
2950 | } |
2951 | ||
77626355 | 2952 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2953 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2954 | ant_toggle_cnt = 1; |
1b696de2 | 2955 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2956 | } else { |
374920cb DH |
2957 | repeat_rate = min(IWL_HT_NUMBER_TRY, |
2958 | LINK_QUAL_AGG_DISABLE_START_DEF - 1); | |
aade00ce | 2959 | } |
b481de9c ZY |
2960 | |
2961 | lq_cmd->general_params.mimo_delimiter = | |
2962 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2963 | |
2964 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2965 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2966 | |
07bc28ed GC |
2967 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2968 | lq_cmd->general_params.single_stream_ant_msk = | |
2969 | tbl_type.ant_type; | |
2970 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2971 | lq_cmd->general_params.dual_stream_ant_msk = | |
2972 | tbl_type.ant_type; | |
2973 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2974 | |
2975 | index++; | |
1b696de2 | 2976 | repeat_rate--; |
bee008b7 WYG |
2977 | if (priv) { |
2978 | if (priv->bt_full_concurrent) | |
2979 | valid_tx_ant = ANT_A; | |
2980 | else | |
9e295116 | 2981 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
bee008b7 | 2982 | } |
aade00ce | 2983 | |
77626355 | 2984 | /* Fill rest of rate table */ |
b481de9c | 2985 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2986 | /* Repeat initial/next rate. |
2987 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2988 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2989 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2990 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2991 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2992 | ant_toggle_cnt++; | |
2993 | else if (priv && | |
2994 | rs_toggle_antenna(valid_tx_ant, | |
2995 | &new_rate, &tbl_type)) | |
2996 | ant_toggle_cnt = 1; | |
da5dbb97 | 2997 | } |
98d7e09a | 2998 | |
77626355 | 2999 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 3000 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
3001 | |
3002 | /* Fill next table entry */ | |
b481de9c | 3003 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 3004 | cpu_to_le32(new_rate); |
1b696de2 | 3005 | repeat_rate--; |
b481de9c ZY |
3006 | index++; |
3007 | } | |
3008 | ||
39e88504 | 3009 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
3010 | &rate_idx); |
3011 | ||
da5dbb97 WYG |
3012 | if (priv && priv->bt_full_concurrent) { |
3013 | /* 1x1 only */ | |
3014 | tbl_type.ant_type = | |
9e295116 | 3015 | first_antenna(priv->hw_params.valid_tx_ant); |
da5dbb97 WYG |
3016 | } |
3017 | ||
77626355 BC |
3018 | /* Indicate to uCode which entries might be MIMO. |
3019 | * If initial rate was MIMO, this will finally end up | |
3020 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
3021 | if (is_mimo(tbl_type.lq_type)) |
3022 | lq_cmd->general_params.mimo_delimiter = index; | |
3023 | ||
77626355 | 3024 | /* Get next rate */ |
39e88504 GC |
3025 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
3026 | use_ht_possible); | |
b481de9c | 3027 | |
77626355 | 3028 | /* How many times should we repeat the next rate? */ |
b481de9c | 3029 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
3030 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
3031 | ant_toggle_cnt++; | |
3032 | else if (priv && | |
3033 | rs_toggle_antenna(valid_tx_ant, | |
3034 | &new_rate, &tbl_type)) | |
3035 | ant_toggle_cnt = 1; | |
3036 | ||
1b696de2 | 3037 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 3038 | } else { |
1b696de2 | 3039 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 3040 | } |
b481de9c | 3041 | |
77626355 BC |
3042 | /* Don't allow HT rates after next pass. |
3043 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
3044 | use_ht_possible = 0; |
3045 | ||
77626355 | 3046 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 3047 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
3048 | |
3049 | /* Fill next table entry */ | |
39e88504 | 3050 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
3051 | |
3052 | index++; | |
1b696de2 | 3053 | repeat_rate--; |
b481de9c ZY |
3054 | } |
3055 | ||
7b090687 JB |
3056 | lq_cmd->agg_params.agg_frame_cnt_limit = |
3057 | sta_priv->max_agg_bufsize ?: LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
13c33a09 | 3058 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; |
7469701e | 3059 | |
13c33a09 WYG |
3060 | lq_cmd->agg_params.agg_time_limit = |
3061 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
7469701e WYG |
3062 | /* |
3063 | * overwrite if needed, pass aggregation time limit | |
3064 | * to uCode in uSec | |
3065 | */ | |
38622419 DF |
3066 | if (priv && cfg(priv)->bt_params && |
3067 | cfg(priv)->bt_params->agg_time_limit && | |
66e863a5 | 3068 | priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) |
7469701e | 3069 | lq_cmd->agg_params.agg_time_limit = |
38622419 | 3070 | cpu_to_le16(cfg(priv)->bt_params->agg_time_limit); |
b481de9c ZY |
3071 | } |
3072 | ||
4b7679a5 | 3073 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 3074 | { |
4b7679a5 | 3075 | return hw->priv; |
b481de9c ZY |
3076 | } |
3077 | /* rate scale requires free function to be implemented */ | |
3078 | static void rs_free(void *priv_rate) | |
3079 | { | |
3080 | return; | |
3081 | } | |
3082 | ||
4b7679a5 JB |
3083 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
3084 | void *priv_sta) | |
b481de9c | 3085 | { |
d0f76d68 EG |
3086 | struct iwl_op_mode *op_mode __maybe_unused = priv_r; |
3087 | struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode); | |
b481de9c | 3088 | |
e1623446 | 3089 | IWL_DEBUG_RATE(priv, "enter\n"); |
e1623446 | 3090 | IWL_DEBUG_RATE(priv, "leave\n"); |
b481de9c ZY |
3091 | } |
3092 | ||
93dc646a | 3093 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
3094 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
3095 | u32 *rate_n_flags, int index) | |
98d7e09a | 3096 | { |
bf403db8 | 3097 | struct iwl_priv *priv; |
3c4955f8 WYG |
3098 | u8 valid_tx_ant; |
3099 | u8 ant_sel_tx; | |
bf403db8 EK |
3100 | |
3101 | priv = lq_sta->drv; | |
9e295116 | 3102 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
39e88504 | 3103 | if (lq_sta->dbg_fixed_rate) { |
3c4955f8 WYG |
3104 | ant_sel_tx = |
3105 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
3106 | >> RATE_MCS_ANT_POS); | |
3107 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
39e88504 | 3108 | *rate_n_flags = lq_sta->dbg_fixed_rate; |
3c4955f8 | 3109 | IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
39e88504 | 3110 | } else { |
3c4955f8 WYG |
3111 | lq_sta->dbg_fixed_rate = 0; |
3112 | IWL_ERR(priv, | |
3113 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
3114 | ant_sel_tx, valid_tx_ant); | |
3115 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); | |
39e88504 | 3116 | } |
39e88504 | 3117 | } else { |
e1623446 | 3118 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
98d7e09a | 3119 | } |
98d7e09a | 3120 | } |
5ae212c9 | 3121 | |
98d7e09a ZY |
3122 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
3123 | const char __user *user_buf, size_t count, loff_t *ppos) | |
3124 | { | |
e227ceac | 3125 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 3126 | struct iwl_priv *priv; |
98d7e09a | 3127 | char buf[64]; |
805d7d23 | 3128 | size_t buf_size; |
98d7e09a | 3129 | u32 parsed_rate; |
6489854b | 3130 | |
98d7e09a | 3131 | |
bf403db8 | 3132 | priv = lq_sta->drv; |
98d7e09a ZY |
3133 | memset(buf, 0, sizeof(buf)); |
3134 | buf_size = min(count, sizeof(buf) - 1); | |
3135 | if (copy_from_user(buf, user_buf, buf_size)) | |
3136 | return -EFAULT; | |
3137 | ||
3138 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
4e308119 | 3139 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 3140 | else |
4e308119 | 3141 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 3142 | |
6489854b | 3143 | rs_program_fix_rate(priv, lq_sta); |
98d7e09a ZY |
3144 | |
3145 | return count; | |
3146 | } | |
0209dc11 | 3147 | |
5ae212c9 ZY |
3148 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
3149 | char __user *user_buf, size_t count, loff_t *ppos) | |
3150 | { | |
a412c804 | 3151 | char *buff; |
5ae212c9 ZY |
3152 | int desc = 0; |
3153 | int i = 0; | |
12b96817 | 3154 | int index = 0; |
a412c804 | 3155 | ssize_t ret; |
5ae212c9 | 3156 | |
e227ceac | 3157 | struct iwl_lq_sta *lq_sta = file->private_data; |
d8ae4f52 | 3158 | struct iwl_priv *priv; |
adb7b5e6 | 3159 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
5ae212c9 | 3160 | |
d8ae4f52 | 3161 | priv = lq_sta->drv; |
a412c804 FS |
3162 | buff = kmalloc(1024, GFP_KERNEL); |
3163 | if (!buff) | |
3164 | return -ENOMEM; | |
3165 | ||
c33104f0 | 3166 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 3167 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 3168 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 3169 | lq_sta->active_legacy_rate); |
98d7e09a | 3170 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
4e308119 | 3171 | lq_sta->dbg_fixed_rate); |
d8ae4f52 | 3172 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
9e295116 JB |
3173 | (priv->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", |
3174 | (priv->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
3175 | (priv->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
adb7b5e6 WYG |
3176 | desc += sprintf(buff+desc, "lq type %s\n", |
3177 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
3178 | if (is_Ht(tbl->lq_type)) { | |
3179 | desc += sprintf(buff+desc, " %s", | |
3180 | (is_siso(tbl->lq_type)) ? "SISO" : | |
3181 | ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); | |
3182 | desc += sprintf(buff+desc, " %s", | |
7aafef1c | 3183 | (tbl->is_ht40) ? "40MHz" : "20MHz"); |
e3949d62 DH |
3184 | desc += sprintf(buff+desc, " %s %s %s\n", (tbl->is_SGI) ? "SGI" : "", |
3185 | (lq_sta->is_green) ? "GF enabled" : "", | |
3186 | (lq_sta->is_agg) ? "AGG on" : ""); | |
adb7b5e6 | 3187 | } |
12b96817 WYG |
3188 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", |
3189 | lq_sta->last_rate_n_flags); | |
5ae212c9 ZY |
3190 | desc += sprintf(buff+desc, "general:" |
3191 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
3192 | lq_sta->lq.general_params.flags, |
3193 | lq_sta->lq.general_params.mimo_delimiter, | |
3194 | lq_sta->lq.general_params.single_stream_ant_msk, | |
3195 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
3196 | |
3197 | desc += sprintf(buff+desc, "agg:" | |
3198 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
3199 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
3200 | lq_sta->lq.agg_params.agg_dis_start_th, | |
3201 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
3202 | |
3203 | desc += sprintf(buff+desc, | |
3204 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
3205 | lq_sta->lq.general_params.start_rate_index[0], |
3206 | lq_sta->lq.general_params.start_rate_index[1], | |
3207 | lq_sta->lq.general_params.start_rate_index[2], | |
3208 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 | 3209 | |
12b96817 WYG |
3210 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
3211 | index = iwl_hwrate_to_plcp_idx( | |
3212 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); | |
3213 | if (is_legacy(tbl->lq_type)) { | |
3214 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
3215 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
3216 | iwl_rate_mcs[index].mbps); | |
3217 | } else { | |
3218 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", | |
3219 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
3220 | iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); | |
3221 | } | |
3222 | } | |
5ae212c9 | 3223 | |
a412c804 FS |
3224 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
3225 | kfree(buff); | |
3226 | return ret; | |
5ae212c9 ZY |
3227 | } |
3228 | ||
3229 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 3230 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 | 3231 | .read = rs_sta_dbgfs_scale_table_read, |
234e3405 | 3232 | .open = simple_open, |
6038f373 | 3233 | .llseek = default_llseek, |
5ae212c9 | 3234 | }; |
0209dc11 ZY |
3235 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
3236 | char __user *user_buf, size_t count, loff_t *ppos) | |
3237 | { | |
a412c804 | 3238 | char *buff; |
0209dc11 ZY |
3239 | int desc = 0; |
3240 | int i, j; | |
a412c804 | 3241 | ssize_t ret; |
0209dc11 | 3242 | |
e227ceac | 3243 | struct iwl_lq_sta *lq_sta = file->private_data; |
a412c804 FS |
3244 | |
3245 | buff = kmalloc(1024, GFP_KERNEL); | |
3246 | if (!buff) | |
3247 | return -ENOMEM; | |
3248 | ||
0209dc11 | 3249 | for (i = 0; i < LQ_SIZE; i++) { |
7aafef1c WYG |
3250 | desc += sprintf(buff+desc, |
3251 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
0209dc11 | 3252 | "rate=0x%X\n", |
c3056065 | 3253 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
3254 | lq_sta->lq_info[i].lq_type, |
3255 | lq_sta->lq_info[i].is_SGI, | |
7aafef1c | 3256 | lq_sta->lq_info[i].is_ht40, |
c33104f0 | 3257 | lq_sta->lq_info[i].is_dup, |
2681b20b | 3258 | lq_sta->is_green, |
39e88504 | 3259 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
3260 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
3261 | desc += sprintf(buff+desc, | |
c33104f0 TW |
3262 | "counter=%d success=%d %%=%d\n", |
3263 | lq_sta->lq_info[i].win[j].counter, | |
3264 | lq_sta->lq_info[i].win[j].success_counter, | |
3265 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
3266 | } |
3267 | } | |
a412c804 FS |
3268 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
3269 | kfree(buff); | |
3270 | return ret; | |
0209dc11 ZY |
3271 | } |
3272 | ||
3273 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
3274 | .read = rs_sta_dbgfs_stats_table_read, | |
234e3405 | 3275 | .open = simple_open, |
6038f373 | 3276 | .llseek = default_llseek, |
0209dc11 | 3277 | }; |
5ae212c9 | 3278 | |
38167459 WYG |
3279 | static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
3280 | char __user *user_buf, size_t count, loff_t *ppos) | |
3281 | { | |
38167459 | 3282 | struct iwl_lq_sta *lq_sta = file->private_data; |
38167459 | 3283 | struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; |
70817b5e JB |
3284 | char buff[120]; |
3285 | int desc = 0; | |
38167459 WYG |
3286 | |
3287 | if (is_Ht(tbl->lq_type)) | |
3288 | desc += sprintf(buff+desc, | |
3289 | "Bit Rate= %d Mb/s\n", | |
3290 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
3291 | else | |
3292 | desc += sprintf(buff+desc, | |
3293 | "Bit Rate= %d Mb/s\n", | |
3294 | iwl_rates[lq_sta->last_txrate_idx].ieee >> 1); | |
38167459 | 3295 | |
08960dea | 3296 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
38167459 WYG |
3297 | } |
3298 | ||
3299 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
3300 | .read = rs_sta_dbgfs_rate_scale_data_read, | |
234e3405 | 3301 | .open = simple_open, |
6038f373 | 3302 | .llseek = default_llseek, |
38167459 WYG |
3303 | }; |
3304 | ||
93dc646a ZY |
3305 | static void rs_add_debugfs(void *priv, void *priv_sta, |
3306 | struct dentry *dir) | |
3307 | { | |
e227ceac | 3308 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 3309 | lq_sta->rs_sta_dbgfs_scale_table_file = |
43e85115 | 3310 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
c33104f0 TW |
3311 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
3312 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
43e85115 | 3313 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, |
c33104f0 | 3314 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
38167459 | 3315 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = |
43e85115 | 3316 | debugfs_create_file("rate_scale_data", S_IRUSR, dir, |
38167459 | 3317 | lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); |
0c11b4de | 3318 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
43e85115 | 3319 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, |
0c11b4de | 3320 | &lq_sta->tx_agg_tid_en); |
0c11b4de | 3321 | |
93dc646a ZY |
3322 | } |
3323 | ||
3324 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
3325 | { | |
e227ceac | 3326 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
3327 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
3328 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
38167459 | 3329 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); |
0c11b4de | 3330 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
3331 | } |
3332 | #endif | |
3333 | ||
fe6b23dd RC |
3334 | /* |
3335 | * Initialization of rate scaling information is done by driver after | |
3336 | * the station is added. Since mac80211 calls this function before a | |
3337 | * station is added we ignore it. | |
3338 | */ | |
3339 | static void rs_rate_init_stub(void *priv_r, struct ieee80211_supported_band *sband, | |
3340 | struct ieee80211_sta *sta, void *priv_sta) | |
3341 | { | |
3342 | } | |
b481de9c ZY |
3343 | static struct rate_control_ops rs_ops = { |
3344 | .module = NULL, | |
3345 | .name = RS_NAME, | |
3346 | .tx_status = rs_tx_status, | |
3347 | .get_rate = rs_get_rate, | |
fe6b23dd | 3348 | .rate_init = rs_rate_init_stub, |
b481de9c ZY |
3349 | .alloc = rs_alloc, |
3350 | .free = rs_free, | |
3351 | .alloc_sta = rs_alloc_sta, | |
3352 | .free_sta = rs_free_sta, | |
93dc646a ZY |
3353 | #ifdef CONFIG_MAC80211_DEBUGFS |
3354 | .add_sta_debugfs = rs_add_debugfs, | |
3355 | .remove_sta_debugfs = rs_remove_debugfs, | |
3356 | #endif | |
b481de9c ZY |
3357 | }; |
3358 | ||
e227ceac | 3359 | int iwlagn_rate_control_register(void) |
b481de9c | 3360 | { |
897e1cf2 | 3361 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
3362 | } |
3363 | ||
e227ceac | 3364 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
3365 | { |
3366 | ieee80211_rate_control_unregister(&rs_ops); | |
3367 | } | |
3368 |