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4273a380 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b481de9c ZY |
2 | /****************************************************************************** |
3 | * | |
51368bf7 | 4 | * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. |
b481de9c | 5 | * |
b481de9c | 6 | * Contact Information: |
cb2f8277 | 7 | * Intel Linux Wireless <linuxwifi@intel.com> |
b481de9c ZY |
8 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
9 | * | |
10 | *****************************************************************************/ | |
11 | #include <linux/kernel.h> | |
b481de9c | 12 | #include <linux/skbuff.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
b481de9c | 14 | #include <net/mac80211.h> |
b481de9c ZY |
15 | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <linux/delay.h> | |
19 | ||
20 | #include <linux/workqueue.h> | |
21 | ||
1023fdc4 JB |
22 | #include "dev.h" |
23 | #include "agn.h" | |
b481de9c | 24 | |
e227ceac | 25 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 26 | |
aade00ce | 27 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
28 | #define IWL_NUMBER_TRY 1 |
29 | #define IWL_HT_NUMBER_TRY 3 | |
30 | ||
77626355 BC |
31 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
32 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
33 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
34 | ||
7d049e5a AM |
35 | /* max allowed rate miss before sync LQ cmd */ |
36 | #define IWL_MISSED_RATE_MAX 15 | |
77626355 | 37 | /* max time to accum history 2 seconds */ |
447fee70 | 38 | #define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ) |
b481de9c ZY |
39 | |
40 | static u8 rs_ht_to_legacy[] = { | |
41 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
42 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
43 | IWL_RATE_6M_INDEX, | |
44 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
45 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
46 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
47 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
48 | }; | |
49 | ||
aade00ce GC |
50 | static const u8 ant_toggle_lookup[] = { |
51 | /*ANT_NONE -> */ ANT_NONE, | |
52 | /*ANT_A -> */ ANT_B, | |
53 | /*ANT_B -> */ ANT_C, | |
54 | /*ANT_AB -> */ ANT_BC, | |
55 | /*ANT_C -> */ ANT_A, | |
56 | /*ANT_AC -> */ ANT_AB, | |
57 | /*ANT_BC -> */ ANT_AC, | |
58 | /*ANT_ABC -> */ ANT_ABC, | |
59 | }; | |
60 | ||
635b85b4 JB |
61 | #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ |
62 | [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ | |
63 | IWL_RATE_SISO_##s##M_PLCP, \ | |
64 | IWL_RATE_MIMO2_##s##M_PLCP,\ | |
65 | IWL_RATE_MIMO3_##s##M_PLCP,\ | |
66 | IWL_RATE_##r##M_IEEE, \ | |
67 | IWL_RATE_##ip##M_INDEX, \ | |
68 | IWL_RATE_##in##M_INDEX, \ | |
69 | IWL_RATE_##rp##M_INDEX, \ | |
70 | IWL_RATE_##rn##M_INDEX, \ | |
71 | IWL_RATE_##pp##M_INDEX, \ | |
72 | IWL_RATE_##np##M_INDEX } | |
73 | ||
74 | /* | |
75 | * Parameter order: | |
76 | * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate | |
77 | * | |
78 | * If there isn't a valid next or previous rate then INV is used which | |
79 | * maps to IWL_RATE_INVALID | |
80 | * | |
81 | */ | |
82 | const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = { | |
83 | IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ | |
84 | IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ | |
85 | IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ | |
86 | IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ | |
87 | IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ | |
88 | IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ | |
89 | IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ | |
90 | IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ | |
91 | IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ | |
92 | IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ | |
93 | IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ | |
94 | IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ | |
95 | IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ | |
96 | /* FIXME:RS: ^^ should be INV (legacy) */ | |
97 | }; | |
98 | ||
2520546a DH |
99 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
100 | { | |
101 | return (u8)(rate_n_flags & RATE_MCS_RATE_MSK); | |
102 | } | |
103 | ||
635b85b4 JB |
104 | static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) |
105 | { | |
106 | int idx = 0; | |
107 | ||
108 | /* HT rate format */ | |
109 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
2520546a | 110 | idx = rs_extract_rate(rate_n_flags); |
635b85b4 JB |
111 | |
112 | if (idx >= IWL_RATE_MIMO3_6M_PLCP) | |
113 | idx = idx - IWL_RATE_MIMO3_6M_PLCP; | |
114 | else if (idx >= IWL_RATE_MIMO2_6M_PLCP) | |
115 | idx = idx - IWL_RATE_MIMO2_6M_PLCP; | |
116 | ||
117 | idx += IWL_FIRST_OFDM_RATE; | |
118 | /* skip 9M not supported in ht*/ | |
119 | if (idx >= IWL_RATE_9M_INDEX) | |
120 | idx += 1; | |
121 | if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE)) | |
122 | return idx; | |
123 | ||
124 | /* legacy rate format, search for match in table */ | |
125 | } else { | |
126 | for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) | |
2520546a DH |
127 | if (iwl_rates[idx].plcp == |
128 | rs_extract_rate(rate_n_flags)) | |
635b85b4 JB |
129 | return idx; |
130 | } | |
131 | ||
132 | return -1; | |
133 | } | |
134 | ||
c79dd5b5 | 135 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 136 | struct sk_buff *skb, |
4b7679a5 JB |
137 | struct ieee80211_sta *sta, |
138 | struct iwl_lq_sta *lq_sta); | |
46f9381a | 139 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 140 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
da5dbb97 | 141 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); |
b481de9c ZY |
142 | |
143 | ||
98d7e09a | 144 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
145 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
146 | u32 *rate_n_flags, int index); | |
98d7e09a | 147 | #else |
e227ceac TW |
148 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
149 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
150 | {} |
151 | #endif | |
77626355 | 152 | |
e3949d62 DH |
153 | /** |
154 | * The following tables contain the expected throughput metrics for all rates | |
155 | * | |
156 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
157 | * | |
158 | * where invalid entries are zeros. | |
159 | * | |
160 | * CCK rates are only valid in legacy table and will only be used in G | |
161 | * (2.4 GHz) band. | |
77626355 | 162 | */ |
584a0f00 | 163 | |
a34529e8 | 164 | static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = { |
e3949d62 | 165 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 |
b481de9c ZY |
166 | }; |
167 | ||
a34529e8 | 168 | static const u16 expected_tpt_siso20MHz[4][IWL_RATE_COUNT] = { |
7fc11e9b WYG |
169 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202}, /* Norm */ |
170 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210}, /* SGI */ | |
171 | {0, 0, 0, 0, 47, 0, 91, 133, 171, 242, 305, 334, 362}, /* AGG */ | |
172 | {0, 0, 0, 0, 52, 0, 101, 145, 187, 264, 330, 361, 390}, /* AGG+SGI */ | |
b481de9c ZY |
173 | }; |
174 | ||
a34529e8 | 175 | static const u16 expected_tpt_siso40MHz[4][IWL_RATE_COUNT] = { |
e3949d62 DH |
176 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ |
177 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ | |
7fc11e9b WYG |
178 | {0, 0, 0, 0, 94, 0, 177, 249, 313, 423, 512, 550, 586}, /* AGG */ |
179 | {0, 0, 0, 0, 104, 0, 193, 270, 338, 454, 545, 584, 620}, /* AGG+SGI */ | |
b481de9c ZY |
180 | }; |
181 | ||
a34529e8 | 182 | static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
7fc11e9b WYG |
183 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 214, 236, 244, 251}, /* Norm */ |
184 | {0, 0, 0, 0, 81, 0, 131, 164, 188, 223, 243, 251, 257}, /* SGI */ | |
185 | {0, 0, 0, 0, 89, 0, 167, 235, 296, 402, 488, 526, 560}, /* AGG */ | |
186 | {0, 0, 0, 0, 97, 0, 182, 255, 320, 431, 520, 558, 593}, /* AGG+SGI*/ | |
b481de9c ZY |
187 | }; |
188 | ||
a34529e8 | 189 | static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
e3949d62 DH |
190 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ |
191 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ | |
7fc11e9b WYG |
192 | {0, 0, 0, 0, 171, 0, 305, 410, 496, 634, 731, 771, 805}, /* AGG */ |
193 | {0, 0, 0, 0, 186, 0, 329, 439, 527, 667, 764, 803, 838}, /* AGG+SGI */ | |
b481de9c ZY |
194 | }; |
195 | ||
a34529e8 | 196 | static const u16 expected_tpt_mimo3_20MHz[4][IWL_RATE_COUNT] = { |
e3949d62 DH |
197 | {0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268}, /* Norm */ |
198 | {0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273}, /* SGI */ | |
199 | {0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775}, /* AGG */ | |
200 | {0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818}, /* AGG+SGI */ | |
584a0f00 WYG |
201 | }; |
202 | ||
a34529e8 | 203 | static const u16 expected_tpt_mimo3_40MHz[4][IWL_RATE_COUNT] = { |
e3949d62 DH |
204 | {0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297}, /* Norm */ |
205 | {0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300}, /* SGI */ | |
206 | {0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070}, /* AGG */ | |
207 | {0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109}, /* AGG+SGI */ | |
584a0f00 WYG |
208 | }; |
209 | ||
12b96817 | 210 | /* mbps, mcs */ |
79496738 | 211 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { |
e3949d62 DH |
212 | { "1", "BPSK DSSS"}, |
213 | { "2", "QPSK DSSS"}, | |
214 | {"5.5", "BPSK CCK"}, | |
215 | { "11", "QPSK CCK"}, | |
216 | { "6", "BPSK 1/2"}, | |
217 | { "9", "BPSK 1/2"}, | |
218 | { "12", "QPSK 1/2"}, | |
219 | { "18", "QPSK 3/4"}, | |
220 | { "24", "16QAM 1/2"}, | |
221 | { "36", "16QAM 3/4"}, | |
222 | { "48", "64QAM 2/3"}, | |
223 | { "54", "64QAM 3/4"}, | |
224 | { "60", "64QAM 5/6"}, | |
12b96817 WYG |
225 | }; |
226 | ||
a9c146b3 WYG |
227 | #define MCS_INDEX_PER_STREAM (8) |
228 | ||
e227ceac | 229 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
230 | { |
231 | window->data = 0; | |
232 | window->success_counter = 0; | |
233 | window->success_ratio = IWL_INVALID_VALUE; | |
234 | window->counter = 0; | |
235 | window->average_tpt = IWL_INVALID_VALUE; | |
236 | window->stamp = 0; | |
b481de9c ZY |
237 | } |
238 | ||
aade00ce GC |
239 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
240 | { | |
3ac7f146 | 241 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
242 | } |
243 | ||
0c11b4de RR |
244 | /* |
245 | * removes the old data from the statistics. All data that is older than | |
246 | * TID_MAX_TIME_DIFF, will be deleted. | |
247 | */ | |
e227ceac | 248 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
249 | { |
250 | /* The oldest age we want to keep */ | |
251 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
252 | ||
253 | while (tl->queue_count && | |
254 | (tl->time_stamp < oldest_time)) { | |
255 | tl->total -= tl->packet_count[tl->head]; | |
256 | tl->packet_count[tl->head] = 0; | |
257 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
258 | tl->queue_count--; | |
259 | tl->head++; | |
260 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
261 | tl->head = 0; | |
262 | } | |
263 | } | |
264 | ||
265 | /* | |
266 | * increment traffic load value for tid and also remove | |
267 | * any old values if passed the certain time period | |
268 | */ | |
e227ceac | 269 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 270 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
271 | { |
272 | u32 curr_time = jiffies_to_msecs(jiffies); | |
273 | u32 time_diff; | |
274 | s32 index; | |
e227ceac | 275 | struct iwl_traffic_load *tl = NULL; |
54dbb525 | 276 | u8 tid; |
0c11b4de | 277 | |
417f114b | 278 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
fd7c8a40 | 279 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
54dbb525 TW |
280 | tid = qc[0] & 0xf; |
281 | } else | |
5f85a789 | 282 | return IWL_MAX_TID_COUNT; |
0c11b4de | 283 | |
a8448553 | 284 | if (unlikely(tid >= IWL_MAX_TID_COUNT)) |
5f85a789 | 285 | return IWL_MAX_TID_COUNT; |
e6a6cf4c | 286 | |
0c11b4de RR |
287 | tl = &lq_data->load[tid]; |
288 | ||
289 | curr_time -= curr_time % TID_ROUND_VALUE; | |
290 | ||
291 | /* Happens only for the first packet. Initialize the data */ | |
292 | if (!(tl->queue_count)) { | |
293 | tl->total = 1; | |
294 | tl->time_stamp = curr_time; | |
295 | tl->queue_count = 1; | |
296 | tl->head = 0; | |
297 | tl->packet_count[0] = 1; | |
5f85a789 | 298 | return IWL_MAX_TID_COUNT; |
0c11b4de RR |
299 | } |
300 | ||
301 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
302 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
303 | ||
304 | /* The history is too long: remove data that is older than */ | |
305 | /* TID_MAX_TIME_DIFF */ | |
306 | if (index >= TID_QUEUE_MAX_SIZE) | |
307 | rs_tl_rm_old_stats(tl, curr_time); | |
308 | ||
309 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
310 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
311 | tl->total = tl->total + 1; | |
312 | ||
313 | if ((index + 1) > tl->queue_count) | |
314 | tl->queue_count = index + 1; | |
faa29718 RR |
315 | |
316 | return tid; | |
0c11b4de RR |
317 | } |
318 | ||
54a430c0 | 319 | #ifdef CONFIG_MAC80211_DEBUGFS |
4e308119 WYG |
320 | /** |
321 | * Program the device to use fixed rate for frame transmit | |
322 | * This is for debugging/testing only | |
323 | * once the device start use fixed rate, we need to reload the module | |
324 | * to being back the normal operation. | |
325 | */ | |
6489854b WYG |
326 | static void rs_program_fix_rate(struct iwl_priv *priv, |
327 | struct iwl_lq_sta *lq_sta) | |
328 | { | |
329 | struct iwl_station_priv *sta_priv = | |
330 | container_of(lq_sta, struct iwl_station_priv, lq_sta); | |
c6892906 | 331 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
6489854b WYG |
332 | |
333 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
334 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
335 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
336 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
337 | ||
6489854b | 338 | IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
4e308119 | 339 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
6489854b | 340 | |
4e308119 WYG |
341 | if (lq_sta->dbg_fixed_rate) { |
342 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); | |
6489854b WYG |
343 | iwl_send_lq_cmd(lq_sta->drv, ctx, &lq_sta->lq, CMD_ASYNC, |
344 | false); | |
345 | } | |
346 | } | |
347 | #endif | |
348 | ||
0c11b4de RR |
349 | /* |
350 | get the traffic load value for tid | |
351 | */ | |
ad04e088 | 352 | static void rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
353 | { |
354 | u32 curr_time = jiffies_to_msecs(jiffies); | |
355 | u32 time_diff; | |
356 | s32 index; | |
e227ceac | 357 | struct iwl_traffic_load *tl = NULL; |
0c11b4de | 358 | |
a8448553 | 359 | if (tid >= IWL_MAX_TID_COUNT) |
ad04e088 | 360 | return; |
0c11b4de RR |
361 | |
362 | tl = &(lq_data->load[tid]); | |
363 | ||
364 | curr_time -= curr_time % TID_ROUND_VALUE; | |
365 | ||
366 | if (!(tl->queue_count)) | |
ad04e088 | 367 | return; |
0c11b4de RR |
368 | |
369 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
370 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
371 | ||
372 | /* The history is too long: remove data that is older than */ | |
373 | /* TID_MAX_TIME_DIFF */ | |
374 | if (index >= TID_QUEUE_MAX_SIZE) | |
375 | rs_tl_rm_old_stats(tl, curr_time); | |
0c11b4de RR |
376 | } |
377 | ||
82ca9341 | 378 | static int rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 379 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 380 | struct ieee80211_sta *sta) |
0c11b4de | 381 | { |
82ca9341 | 382 | int ret = -EAGAIN; |
290f599c JB |
383 | |
384 | /* | |
385 | * Don't create TX aggregation sessions when in high | |
386 | * BT traffic, as they would just be disrupted by BT. | |
387 | */ | |
388 | if (priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) { | |
6690c01d JB |
389 | IWL_DEBUG_COEX(priv, |
390 | "BT traffic (%d), no aggregation allowed\n", | |
391 | priv->bt_traffic_load); | |
290f599c JB |
392 | return ret; |
393 | } | |
394 | ||
ad04e088 | 395 | rs_tl_get_load(lq_data, tid); |
45d42700 | 396 | |
44cc429c EG |
397 | IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
398 | sta->addr, tid); | |
399 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); | |
400 | if (ret == -EAGAIN) { | |
401 | /* | |
402 | * driver and mac80211 is out of sync | |
403 | * this might be cause by reloading firmware | |
404 | * stop the tx ba session here | |
405 | */ | |
406 | IWL_ERR(priv, "Fail start Tx agg on tid: %d\n", | |
407 | tid); | |
408 | ieee80211_stop_tx_ba_session(sta, tid); | |
2411054a | 409 | } |
82ca9341 | 410 | return ret; |
0c11b4de RR |
411 | } |
412 | ||
c79dd5b5 | 413 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 414 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 415 | struct ieee80211_sta *sta) |
0c11b4de | 416 | { |
a8448553 | 417 | if (tid < IWL_MAX_TID_COUNT) |
cfecc6b4 WYG |
418 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); |
419 | else | |
a8448553 JB |
420 | IWL_ERR(priv, "tid exceeds max TID count: %d/%d\n", |
421 | tid, IWL_MAX_TID_COUNT); | |
0c11b4de RR |
422 | } |
423 | ||
39e88504 | 424 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 425 | { |
3ac7f146 TW |
426 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
427 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
428 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
429 | } |
430 | ||
04f2dec1 SZ |
431 | /* |
432 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
433 | * that wraps a NULL pointer check | |
434 | */ | |
435 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
436 | { | |
437 | if (tbl->expected_tpt) | |
438 | return tbl->expected_tpt[rs_index]; | |
439 | return 0; | |
440 | } | |
441 | ||
77626355 BC |
442 | /** |
443 | * rs_collect_tx_data - Update the success/failure sliding window | |
444 | * | |
445 | * We keep a sliding window of the last 62 packets transmitted | |
446 | * at this rate. window->data contains the bitmask of successful | |
447 | * packets. | |
448 | */ | |
04f2dec1 SZ |
449 | static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl, |
450 | int scale_index, int attempts, int successes) | |
b481de9c | 451 | { |
e227ceac | 452 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 453 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
04f2dec1 | 454 | s32 fail_count, tpt; |
b481de9c | 455 | |
dc2453ae TW |
456 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
457 | return -EINVAL; | |
b481de9c | 458 | |
e3949d62 | 459 | /* Select window for current tx bit rate */ |
04f2dec1 SZ |
460 | window = &(tbl->win[scale_index]); |
461 | ||
462 | /* Get expected throughput */ | |
463 | tpt = get_expected_tpt(tbl, scale_index); | |
b481de9c | 464 | |
77626355 BC |
465 | /* |
466 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
467 | * history window; anything older isn't really relevant any more. | |
468 | * If we have filled up the sliding window, drop the oldest attempt; | |
469 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
470 | * subtract "1" from the success counter (this is the main reason | |
471 | * we keep these bitmaps!). | |
472 | */ | |
e3949d62 | 473 | while (attempts > 0) { |
39e88504 GC |
474 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
475 | ||
476 | /* remove earliest */ | |
477 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
478 | ||
99556438 RR |
479 | if (window->data & mask) { |
480 | window->data &= ~mask; | |
39e88504 | 481 | window->success_counter--; |
99556438 | 482 | } |
b481de9c | 483 | } |
b481de9c | 484 | |
99556438 RR |
485 | /* Increment frames-attempted counter */ |
486 | window->counter++; | |
487 | ||
e3949d62 | 488 | /* Shift bitmap by one frame to throw away oldest history */ |
90d7795e | 489 | window->data <<= 1; |
e3949d62 DH |
490 | |
491 | /* Mark the most recent #successes attempts as successful */ | |
99556438 | 492 | if (successes > 0) { |
39e88504 | 493 | window->success_counter++; |
99556438 RR |
494 | window->data |= 0x1; |
495 | successes--; | |
496 | } | |
77626355 | 497 | |
e3949d62 | 498 | attempts--; |
b481de9c ZY |
499 | } |
500 | ||
77626355 | 501 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
502 | if (window->counter > 0) |
503 | window->success_ratio = 128 * (100 * window->success_counter) | |
504 | / window->counter; | |
505 | else | |
506 | window->success_ratio = IWL_INVALID_VALUE; | |
507 | ||
508 | fail_count = window->counter - window->success_counter; | |
509 | ||
77626355 | 510 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
511 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
512 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
513 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
514 | else | |
515 | window->average_tpt = IWL_INVALID_VALUE; | |
516 | ||
77626355 | 517 | /* Tag this window as having been updated */ |
b481de9c ZY |
518 | window->stamp = jiffies; |
519 | ||
dc2453ae | 520 | return 0; |
b481de9c ZY |
521 | } |
522 | ||
77626355 BC |
523 | /* |
524 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
525 | */ | |
39e88504 | 526 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
527 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
528 | struct iwl_scale_tbl_info *tbl, | |
529 | int index, u8 use_green) | |
b481de9c | 530 | { |
39e88504 GC |
531 | u32 rate_n_flags = 0; |
532 | ||
b481de9c | 533 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 534 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 535 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 536 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 537 | |
fde0db31 GC |
538 | } else if (is_Ht(tbl->lq_type)) { |
539 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 540 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 541 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 542 | } |
39e88504 | 543 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
544 | |
545 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 546 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 547 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 548 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 549 | else |
1826dcc0 | 550 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 551 | } else { |
978785a3 | 552 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
553 | } |
554 | ||
39e88504 | 555 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 556 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 557 | |
39e88504 | 558 | if (is_Ht(tbl->lq_type)) { |
7aafef1c | 559 | if (tbl->is_ht40) { |
39e88504 GC |
560 | if (tbl->is_dup) |
561 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
562 | else | |
7aafef1c | 563 | rate_n_flags |= RATE_MCS_HT40_MSK; |
39e88504 GC |
564 | } |
565 | if (tbl->is_SGI) | |
566 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
567 | ||
568 | if (use_green) { | |
569 | rate_n_flags |= RATE_MCS_GF_MSK; | |
570 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
571 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 572 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
573 | } |
574 | } | |
b481de9c | 575 | } |
39e88504 | 576 | return rate_n_flags; |
b481de9c ZY |
577 | } |
578 | ||
77626355 BC |
579 | /* |
580 | * Interpret uCode API's rate_n_flags format, | |
581 | * fill "search" or "active" tx mode table. | |
582 | */ | |
39e88504 | 583 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
57fbcce3 | 584 | enum nl80211_band band, |
e227ceac | 585 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
586 | int *rate_idx) |
587 | { | |
39e88504 GC |
588 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
589 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
590 | u8 mcs; | |
b481de9c | 591 | |
80e9158c | 592 | memset(tbl, 0, sizeof(struct iwl_scale_tbl_info)); |
e7d326ac | 593 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 594 | |
fde0db31 | 595 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 596 | *rate_idx = -1; |
dc2453ae | 597 | return -EINVAL; |
b481de9c | 598 | } |
77626355 | 599 | tbl->is_SGI = 0; /* default legacy setup */ |
7aafef1c | 600 | tbl->is_ht40 = 0; |
b481de9c | 601 | tbl->is_dup = 0; |
fde0db31 GC |
602 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
603 | tbl->lq_type = LQ_NONE; | |
d6e93399 | 604 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c | 605 | |
77626355 | 606 | /* legacy rate format */ |
39e88504 | 607 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 608 | if (num_of_ant == 1) { |
57fbcce3 | 609 | if (band == NL80211_BAND_5GHZ) |
b481de9c ZY |
610 | tbl->lq_type = LQ_A; |
611 | else | |
612 | tbl->lq_type = LQ_G; | |
b481de9c | 613 | } |
fde0db31 | 614 | /* HT rate format */ |
b481de9c | 615 | } else { |
39e88504 | 616 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
617 | tbl->is_SGI = 1; |
618 | ||
7aafef1c | 619 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || |
39e88504 | 620 | (rate_n_flags & RATE_MCS_DUP_MSK)) |
7aafef1c | 621 | tbl->is_ht40 = 1; |
b481de9c | 622 | |
39e88504 | 623 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 624 | tbl->is_dup = 1; |
fde0db31 | 625 | |
39e88504 | 626 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 627 | |
39e88504 GC |
628 | /* SISO */ |
629 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
630 | if (num_of_ant == 1) |
631 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
632 | /* MIMO2 */ | |
39e88504 | 633 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
634 | if (num_of_ant == 2) |
635 | tbl->lq_type = LQ_MIMO2; | |
636 | /* MIMO3 */ | |
637 | } else { | |
d6e93399 MA |
638 | if (num_of_ant == 3) { |
639 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; | |
fde0db31 | 640 | tbl->lq_type = LQ_MIMO3; |
d6e93399 | 641 | } |
fde0db31 | 642 | } |
b481de9c ZY |
643 | } |
644 | return 0; | |
645 | } | |
aade00ce GC |
646 | |
647 | /* switch to another antenna/antennas and return 1 */ | |
648 | /* if no other valid antenna found, return 0 */ | |
649 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 650 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 651 | { |
aade00ce GC |
652 | u8 new_ant_type; |
653 | ||
654 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
655 | return 0; | |
656 | ||
657 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
658 | return 0; | |
659 | ||
660 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
661 | ||
662 | while ((new_ant_type != tbl->ant_type) && | |
663 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
664 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
665 | ||
666 | if (new_ant_type == tbl->ant_type) | |
667 | return 0; | |
668 | ||
669 | tbl->ant_type = new_ant_type; | |
670 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
671 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
672 | return 1; | |
b481de9c ZY |
673 | } |
674 | ||
b261793d DH |
675 | /** |
676 | * Green-field mode is valid if the station supports it and | |
677 | * there are no non-GF stations present in the BSS. | |
678 | */ | |
7e6a5886 | 679 | static bool rs_use_green(struct ieee80211_sta *sta) |
b481de9c | 680 | { |
50e2a30c JB |
681 | /* |
682 | * There's a bug somewhere in this code that causes the | |
683 | * scaling to get stuck because GF+SGI can't be combined | |
684 | * in SISO rates. Until we find that bug, disable GF, it | |
685 | * has only limited benefit and we still interoperate with | |
686 | * GF APs since we can always receive GF transmissions. | |
687 | */ | |
688 | return false; | |
b481de9c ZY |
689 | } |
690 | ||
691 | /** | |
692 | * rs_get_supported_rates - get the available rates | |
693 | * | |
694 | * if management frame or broadcast frame only return | |
695 | * basic available rates. | |
696 | * | |
697 | */ | |
e227ceac TW |
698 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
699 | struct ieee80211_hdr *hdr, | |
700 | enum iwl_table_type rate_type) | |
b481de9c | 701 | { |
eecd6e57 GC |
702 | if (is_legacy(rate_type)) { |
703 | return lq_sta->active_legacy_rate; | |
704 | } else { | |
b481de9c | 705 | if (is_siso(rate_type)) |
eecd6e57 | 706 | return lq_sta->active_siso_rate; |
fde0db31 | 707 | else if (is_mimo2(rate_type)) |
eecd6e57 | 708 | return lq_sta->active_mimo2_rate; |
b481de9c | 709 | else |
eecd6e57 | 710 | return lq_sta->active_mimo3_rate; |
c33104f0 | 711 | } |
b481de9c ZY |
712 | } |
713 | ||
bf403db8 EK |
714 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
715 | int rate_type) | |
b481de9c ZY |
716 | { |
717 | u8 high = IWL_RATE_INVALID; | |
718 | u8 low = IWL_RATE_INVALID; | |
719 | ||
01ebd063 | 720 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
721 | * the rate table */ |
722 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
723 | int i; | |
724 | u32 mask; | |
725 | ||
726 | /* Find the previous rate that is in the rate mask */ | |
727 | i = index - 1; | |
1aa0ec5c EG |
728 | if (i >= 0) |
729 | mask = BIT(i); | |
730 | ||
731 | for (; i >= 0; i--, mask >>= 1) { | |
b481de9c ZY |
732 | if (rate_mask & mask) { |
733 | low = i; | |
734 | break; | |
735 | } | |
736 | } | |
737 | ||
738 | /* Find the next rate that is in the rate mask */ | |
739 | i = index + 1; | |
740 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
741 | if (rate_mask & mask) { | |
742 | high = i; | |
743 | break; | |
744 | } | |
745 | } | |
746 | ||
747 | return (high << 8) | low; | |
748 | } | |
749 | ||
750 | low = index; | |
751 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 752 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
753 | if (low == IWL_RATE_INVALID) |
754 | break; | |
755 | if (rate_mask & (1 << low)) | |
756 | break; | |
e1623446 | 757 | IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
b481de9c ZY |
758 | } |
759 | ||
760 | high = index; | |
761 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 762 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
763 | if (high == IWL_RATE_INVALID) |
764 | break; | |
765 | if (rate_mask & (1 << high)) | |
766 | break; | |
e1623446 | 767 | IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
b481de9c ZY |
768 | } |
769 | ||
770 | return (high << 8) | low; | |
771 | } | |
772 | ||
e227ceac TW |
773 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
774 | struct iwl_scale_tbl_info *tbl, | |
775 | u8 scale_index, u8 ht_possible) | |
b481de9c | 776 | { |
b481de9c ZY |
777 | s32 low; |
778 | u16 rate_mask; | |
779 | u16 high_low; | |
780 | u8 switch_to_legacy = 0; | |
c33104f0 | 781 | u8 is_green = lq_sta->is_green; |
2ff6578b | 782 | struct iwl_priv *priv = lq_sta->drv; |
b481de9c ZY |
783 | |
784 | /* check if we need to switch from HT to legacy rates. | |
785 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
786 | * are always supported (spec demand) */ | |
787 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
788 | switch_to_legacy = 1; | |
789 | scale_index = rs_ht_to_legacy[scale_index]; | |
57fbcce3 | 790 | if (lq_sta->band == NL80211_BAND_5GHZ) |
b481de9c ZY |
791 | tbl->lq_type = LQ_A; |
792 | else | |
793 | tbl->lq_type = LQ_G; | |
794 | ||
69fdb309 | 795 | if (num_of_ant(tbl->ant_type) > 1) |
2ff6578b | 796 | tbl->ant_type = |
b7998c8b | 797 | first_antenna(priv->nvm_data->valid_tx_ant); |
b481de9c | 798 | |
7aafef1c | 799 | tbl->is_ht40 = 0; |
b481de9c | 800 | tbl->is_SGI = 0; |
d6e93399 | 801 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c ZY |
802 | } |
803 | ||
eecd6e57 | 804 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 805 | |
77626355 | 806 | /* Mask with station rate restriction */ |
b481de9c | 807 | if (is_legacy(tbl->lq_type)) { |
77626355 | 808 | /* supp_rates has no CCK bits in A mode */ |
57fbcce3 | 809 | if (lq_sta->band == NL80211_BAND_5GHZ) |
b481de9c | 810 | rate_mask = (u16)(rate_mask & |
c33104f0 | 811 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 812 | else |
c33104f0 | 813 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
814 | } |
815 | ||
77626355 | 816 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 817 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
818 | low = scale_index; |
819 | goto out; | |
b481de9c ZY |
820 | } |
821 | ||
bf403db8 EK |
822 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
823 | tbl->lq_type); | |
b481de9c ZY |
824 | low = high_low & 0xff; |
825 | ||
39e88504 GC |
826 | if (low == IWL_RATE_INVALID) |
827 | low = scale_index; | |
828 | ||
829 | out: | |
978785a3 | 830 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
831 | } |
832 | ||
95407aa4 DH |
833 | /* |
834 | * Simple function to compare two rate scale table types | |
835 | */ | |
836 | static bool table_type_matches(struct iwl_scale_tbl_info *a, | |
837 | struct iwl_scale_tbl_info *b) | |
838 | { | |
839 | return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) && | |
840 | (a->is_SGI == b->is_SGI); | |
841 | } | |
95407aa4 | 842 | |
7e6a5886 JB |
843 | static void rs_bt_update_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
844 | struct iwl_lq_sta *lq_sta) | |
bee008b7 WYG |
845 | { |
846 | struct iwl_scale_tbl_info *tbl; | |
66e863a5 | 847 | bool full_concurrent = priv->bt_full_concurrent; |
bee008b7 | 848 | |
66e863a5 WYG |
849 | if (priv->bt_ant_couple_ok) { |
850 | /* | |
851 | * Is there a need to switch between | |
852 | * full concurrency and 3-wire? | |
853 | */ | |
e7babbe3 | 854 | if (priv->bt_ci_compliance) |
66e863a5 WYG |
855 | full_concurrent = true; |
856 | else | |
857 | full_concurrent = false; | |
66e863a5 WYG |
858 | } |
859 | if ((priv->bt_traffic_load != priv->last_bt_traffic_load) || | |
860 | (priv->bt_full_concurrent != full_concurrent)) { | |
bee008b7 | 861 | priv->bt_full_concurrent = full_concurrent; |
882dde8e | 862 | priv->last_bt_traffic_load = priv->bt_traffic_load; |
bee008b7 WYG |
863 | |
864 | /* Update uCode's rate table. */ | |
865 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
866 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); | |
7e6a5886 | 867 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
bee008b7 | 868 | |
1ee158d8 | 869 | queue_work(priv->workqueue, &priv->bt_full_concurrency); |
bee008b7 WYG |
870 | } |
871 | } | |
872 | ||
77626355 BC |
873 | /* |
874 | * mac80211 sends us Tx status | |
875 | */ | |
4b7679a5 JB |
876 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
877 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 878 | struct sk_buff *skb) |
b481de9c | 879 | { |
95407aa4 DH |
880 | int legacy_success; |
881 | int retries; | |
882 | int rs_index, mac_index, i; | |
417f114b | 883 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 884 | struct iwl_link_quality_cmd *table; |
b481de9c | 885 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
d0f76d68 EG |
886 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)priv_r; |
887 | struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode); | |
e039fa4a | 888 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5027309b | 889 | enum mac80211_rate_control_flags mac_flags; |
39e88504 | 890 | u32 tx_rate; |
e227ceac | 891 | struct iwl_scale_tbl_info tbl_type; |
04f2dec1 | 892 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
7e6a5886 | 893 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 894 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
b481de9c | 895 | |
e1623446 | 896 | IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
b481de9c | 897 | |
fe6b23dd RC |
898 | /* Treat uninitialized rate scaling data same as non-existing. */ |
899 | if (!lq_sta) { | |
900 | IWL_DEBUG_RATE(priv, "Station rate scaling not created yet.\n"); | |
901 | return; | |
902 | } else if (!lq_sta->drv) { | |
903 | IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); | |
904 | return; | |
905 | } | |
906 | ||
417f114b | 907 | if (!ieee80211_is_data(hdr->frame_control) || |
514d65c1 | 908 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c ZY |
909 | return; |
910 | ||
e3949d62 | 911 | /* This packet was aggregated but doesn't carry status info */ |
e039fa4a JB |
912 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
913 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
914 | return; |
915 | ||
77626355 BC |
916 | /* |
917 | * Ignore this Tx frame response if its initial rate doesn't match | |
918 | * that of latest Link Quality command. There may be stragglers | |
919 | * from a previous Link Quality command, but we're no longer interested | |
920 | * in those; they're either from the "active" mode while we're trying | |
921 | * to check "search" mode, or a prior "search" mode after we've moved | |
922 | * to a new "search" mode (which might become the new "active" mode). | |
923 | */ | |
95407aa4 | 924 | table = &lq_sta->lq; |
39e88504 GC |
925 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
926 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
57fbcce3 | 927 | if (priv->band == NL80211_BAND_5GHZ) |
4c424e4c | 928 | rs_index -= IWL_FIRST_OFDM_RATE; |
5027309b DH |
929 | mac_flags = info->status.rates[0].flags; |
930 | mac_index = info->status.rates[0].idx; | |
31513be8 DH |
931 | /* For HT packets, map MCS to PLCP */ |
932 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
933 | mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ | |
934 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
935 | mac_index++; | |
392a0baf DH |
936 | /* |
937 | * mac80211 HT index is always zero-indexed; we need to move | |
938 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
939 | */ | |
57fbcce3 | 940 | if (priv->band == NL80211_BAND_2GHZ) |
392a0baf | 941 | mac_index += IWL_FIRST_OFDM_RATE; |
31513be8 | 942 | } |
95407aa4 | 943 | /* Here we actually compare this rate to the latest LQ command */ |
5027309b DH |
944 | if ((mac_index < 0) || |
945 | (tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || | |
946 | (tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
947 | (tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) || | |
d748b464 | 948 | (tbl_type.ant_type != info->status.antenna) || |
5027309b DH |
949 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) || |
950 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
31513be8 DH |
951 | (rs_index != mac_index)) { |
952 | IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate); | |
95407aa4 DH |
953 | /* |
954 | * Since rates mis-match, the last LQ command may have failed. | |
955 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
956 | * ... driver. | |
d5e49036 | 957 | */ |
7d049e5a AM |
958 | lq_sta->missed_rate_counter++; |
959 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
960 | lq_sta->missed_rate_counter = 0; | |
7e6a5886 | 961 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
7d049e5a | 962 | } |
95407aa4 DH |
963 | /* Regardless, ignore this status info for outdated rate */ |
964 | return; | |
965 | } else | |
966 | /* Rate did match, so reset the missed_rate_counter */ | |
967 | lq_sta->missed_rate_counter = 0; | |
968 | ||
969 | /* Figure out if rate scale algorithm is in active or search table */ | |
970 | if (table_type_matches(&tbl_type, | |
971 | &(lq_sta->lq_info[lq_sta->active_tbl]))) { | |
972 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
973 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
974 | } else if (table_type_matches(&tbl_type, | |
975 | &lq_sta->lq_info[1 - lq_sta->active_tbl])) { | |
976 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
977 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
978 | } else { | |
979 | IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n"); | |
80e9158c WYG |
980 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
981 | IWL_DEBUG_RATE(priv, "active- lq:%x, ant:%x, SGI:%d\n", | |
982 | tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); | |
983 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
984 | IWL_DEBUG_RATE(priv, "search- lq:%x, ant:%x, SGI:%d\n", | |
985 | tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); | |
986 | IWL_DEBUG_RATE(priv, "actual- lq:%x, ant:%x, SGI:%d\n", | |
987 | tbl_type.lq_type, tbl_type.ant_type, tbl_type.is_SGI); | |
988 | /* | |
989 | * no matching table found, let's by-pass the data collection | |
990 | * and continue to perform rate scale to find the rate table | |
991 | */ | |
da5dbb97 | 992 | rs_stay_in_table(lq_sta, true); |
80e9158c | 993 | goto done; |
b481de9c ZY |
994 | } |
995 | ||
95407aa4 DH |
996 | /* |
997 | * Updating the frame history depends on whether packets were | |
998 | * aggregated. | |
999 | * | |
1000 | * For aggregation, all packets were transmitted at the same rate, the | |
1001 | * first index into rate scale table. | |
1002 | */ | |
1003 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
1004 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); | |
1005 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, | |
1006 | &rs_index); | |
04f2dec1 | 1007 | rs_collect_tx_data(curr_tbl, rs_index, |
e3a3cd87 DH |
1008 | info->status.ampdu_len, |
1009 | info->status.ampdu_ack_len); | |
95407aa4 DH |
1010 | |
1011 | /* Update success/fail counts if not searching for new mode */ | |
1012 | if (lq_sta->stay_in_tbl) { | |
e3a3cd87 DH |
1013 | lq_sta->total_success += info->status.ampdu_ack_len; |
1014 | lq_sta->total_failed += (info->status.ampdu_len - | |
1015 | info->status.ampdu_ack_len); | |
b481de9c | 1016 | } |
95407aa4 | 1017 | } else { |
77626355 | 1018 | /* |
95407aa4 | 1019 | * For legacy, update frame history with for each Tx retry. |
77626355 | 1020 | */ |
95407aa4 DH |
1021 | retries = info->status.rates[0].count - 1; |
1022 | /* HW doesn't send more than 15 retries */ | |
1023 | retries = min(retries, 15); | |
1024 | ||
1025 | /* The last transmission may have been successful */ | |
1026 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1027 | /* Collect data for each rate used during failed TX attempts */ | |
1028 | for (i = 0; i <= retries; ++i) { | |
1029 | tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); | |
1030 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
1031 | &tbl_type, &rs_index); | |
1032 | /* | |
1033 | * Only collect stats if retried rate is in the same RS | |
1034 | * table as active/search. | |
1035 | */ | |
1036 | if (table_type_matches(&tbl_type, curr_tbl)) | |
04f2dec1 | 1037 | tmp_tbl = curr_tbl; |
95407aa4 | 1038 | else if (table_type_matches(&tbl_type, other_tbl)) |
04f2dec1 | 1039 | tmp_tbl = other_tbl; |
95407aa4 DH |
1040 | else |
1041 | continue; | |
04f2dec1 SZ |
1042 | rs_collect_tx_data(tmp_tbl, rs_index, 1, |
1043 | i < retries ? 0 : legacy_success); | |
95407aa4 DH |
1044 | } |
1045 | ||
1046 | /* Update success/fail counts if not searching for new mode */ | |
1047 | if (lq_sta->stay_in_tbl) { | |
1048 | lq_sta->total_success += legacy_success; | |
1049 | lq_sta->total_failed += retries + (1 - legacy_success); | |
99556438 | 1050 | } |
b481de9c | 1051 | } |
95407aa4 DH |
1052 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ |
1053 | lq_sta->last_rate_n_flags = tx_rate; | |
80e9158c | 1054 | done: |
77626355 | 1055 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c | 1056 | if (sta && sta->supp_rates[sband->band]) |
514d65c1 | 1057 | rs_rate_scale_perform(priv, skb, sta, lq_sta); |
c10e2c10 | 1058 | |
0d8877a1 | 1059 | if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist) |
7e6a5886 | 1060 | rs_bt_update_lq(priv, ctx, lq_sta); |
b481de9c ZY |
1061 | } |
1062 | ||
77626355 BC |
1063 | /* |
1064 | * Begin a period of staying with a selected modulation mode. | |
1065 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1066 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1067 | * and reset overall (spanning all rates) tx success history statistics. | |
1068 | * These control how long we stay using same modulation mode before | |
1069 | * searching for a new mode. | |
1070 | */ | |
bf403db8 | 1071 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 1072 | struct iwl_lq_sta *lq_sta) |
b481de9c | 1073 | { |
e1623446 | 1074 | IWL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
c33104f0 | 1075 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 1076 | if (is_legacy) { |
c33104f0 TW |
1077 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
1078 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
1079 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1080 | } else { |
c33104f0 TW |
1081 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
1082 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
1083 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1084 | } |
c33104f0 TW |
1085 | lq_sta->table_count = 0; |
1086 | lq_sta->total_failed = 0; | |
1087 | lq_sta->total_success = 0; | |
447fee70 | 1088 | lq_sta->flush_timer = jiffies; |
d6e93399 | 1089 | lq_sta->action_counter = 0; |
b481de9c ZY |
1090 | } |
1091 | ||
77626355 BC |
1092 | /* |
1093 | * Find correct throughput table for given mode of modulation | |
1094 | */ | |
e227ceac TW |
1095 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
1096 | struct iwl_scale_tbl_info *tbl) | |
b481de9c | 1097 | { |
e3949d62 | 1098 | /* Used to choose among HT tables */ |
a34529e8 | 1099 | const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT]; |
e3949d62 DH |
1100 | |
1101 | /* Check for invalid LQ type */ | |
1102 | if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { | |
1103 | tbl->expected_tpt = expected_tpt_legacy; | |
1104 | return; | |
1105 | } | |
1106 | ||
1107 | /* Legacy rates have only one table */ | |
b481de9c | 1108 | if (is_legacy(tbl->lq_type)) { |
e3949d62 DH |
1109 | tbl->expected_tpt = expected_tpt_legacy; |
1110 | return; | |
1111 | } | |
1112 | ||
1113 | /* Choose among many HT tables depending on number of streams | |
1114 | * (SISO/MIMO2/MIMO3), channel width (20/40), SGI, and aggregation | |
1115 | * status */ | |
1116 | if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1117 | ht_tbl_pointer = expected_tpt_siso20MHz; | |
1118 | else if (is_siso(tbl->lq_type)) | |
1119 | ht_tbl_pointer = expected_tpt_siso40MHz; | |
1120 | else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1121 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1122 | else if (is_mimo2(tbl->lq_type)) | |
1123 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1124 | else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) | |
1125 | ht_tbl_pointer = expected_tpt_mimo3_20MHz; | |
1126 | else /* if (is_mimo3(tbl->lq_type)) <-- must be true */ | |
1127 | ht_tbl_pointer = expected_tpt_mimo3_40MHz; | |
1128 | ||
1129 | if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ | |
1130 | tbl->expected_tpt = ht_tbl_pointer[0]; | |
1131 | else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ | |
1132 | tbl->expected_tpt = ht_tbl_pointer[1]; | |
1133 | else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ | |
1134 | tbl->expected_tpt = ht_tbl_pointer[2]; | |
1135 | else /* AGG+SGI */ | |
1136 | tbl->expected_tpt = ht_tbl_pointer[3]; | |
b481de9c ZY |
1137 | } |
1138 | ||
77626355 BC |
1139 | /* |
1140 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1141 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1142 | * above the current measured throughput of "active" mode, to give new mode | |
1143 | * a fair chance to prove itself without too many challenges. | |
1144 | * | |
1145 | * This gets called when transitioning to more aggressive modulation | |
1146 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1147 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1148 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1149 | * bit rate will typically need to increase, but not if performance was bad. | |
1150 | */ | |
c79dd5b5 | 1151 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1152 | struct iwl_lq_sta *lq_sta, |
1153 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1154 | u16 rate_mask, s8 index) |
b481de9c | 1155 | { |
77626355 | 1156 | /* "active" values */ |
e227ceac | 1157 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1158 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1159 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1160 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 | 1161 | /* expected "search" throughput */ |
a34529e8 | 1162 | const u16 *tpt_tbl = tbl->expected_tpt; |
77626355 BC |
1163 | |
1164 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1165 | u16 high_low; |
f935a6da | 1166 | s8 rate = index; |
b481de9c ZY |
1167 | |
1168 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1169 | ||
1170 | for (; ;) { | |
bf403db8 EK |
1171 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1172 | tbl->lq_type); | |
b481de9c ZY |
1173 | |
1174 | low = high_low & 0xff; | |
1175 | high = (high_low >> 8) & 0xff; | |
1176 | ||
77626355 BC |
1177 | /* |
1178 | * Lower the "search" bit rate, to give new "search" mode | |
1179 | * approximately the same throughput as "active" if: | |
1180 | * | |
1181 | * 1) "Active" mode has been working modestly well (but not | |
1182 | * great), and expected "search" throughput (under perfect | |
1183 | * conditions) at candidate rate is above the actual | |
1184 | * measured "active" throughput (but less than expected | |
1185 | * "active" throughput under perfect conditions). | |
1186 | * OR | |
1187 | * 2) "Active" mode has been working perfectly or very well | |
1188 | * and expected "search" throughput (under perfect | |
1189 | * conditions) at candidate rate is above expected | |
1190 | * "active" throughput (under perfect conditions). | |
1191 | */ | |
c33104f0 | 1192 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1193 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1194 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1195 | (tpt_tbl[rate] <= active_tpt))) || | |
1196 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1197 | (tpt_tbl[rate] > active_tpt))) { | |
1198 | ||
77626355 BC |
1199 | /* (2nd or later pass) |
1200 | * If we've already tried to raise the rate, and are | |
1201 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1202 | if (start_hi != IWL_RATE_INVALID) { |
1203 | new_rate = start_hi; | |
1204 | break; | |
1205 | } | |
77626355 | 1206 | |
b481de9c | 1207 | new_rate = rate; |
77626355 BC |
1208 | |
1209 | /* Loop again with lower rate */ | |
b481de9c ZY |
1210 | if (low != IWL_RATE_INVALID) |
1211 | rate = low; | |
77626355 BC |
1212 | |
1213 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1214 | else |
1215 | break; | |
77626355 BC |
1216 | |
1217 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1218 | } else { |
77626355 BC |
1219 | /* (2nd or later pass) |
1220 | * If we've already tried to lower the rate, and are | |
1221 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1222 | if (new_rate != IWL_RATE_INVALID) |
1223 | break; | |
77626355 BC |
1224 | |
1225 | /* Loop again with higher rate */ | |
b481de9c ZY |
1226 | else if (high != IWL_RATE_INVALID) { |
1227 | start_hi = high; | |
1228 | rate = high; | |
77626355 BC |
1229 | |
1230 | /* Higher rate not available, use the original */ | |
b481de9c | 1231 | } else { |
90d7795e | 1232 | new_rate = rate; |
b481de9c ZY |
1233 | break; |
1234 | } | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | return new_rate; | |
1239 | } | |
b481de9c | 1240 | |
77626355 | 1241 | /* |
584a0f00 | 1242 | * Set up search table for MIMO2 |
77626355 | 1243 | */ |
fde0db31 | 1244 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1245 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1246 | struct ieee80211_conf *conf, |
4b7679a5 | 1247 | struct ieee80211_sta *sta, |
e227ceac | 1248 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1249 | { |
b481de9c ZY |
1250 | u16 rate_mask; |
1251 | s32 rate; | |
c33104f0 | 1252 | s8 is_green = lq_sta->is_green; |
7e6a5886 | 1253 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 1254 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
b481de9c | 1255 | |
de27e64e | 1256 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1257 | return -1; |
1258 | ||
af0ed69b | 1259 | if (sta->smps_mode == IEEE80211_SMPS_STATIC) |
b481de9c ZY |
1260 | return -1; |
1261 | ||
77626355 | 1262 | /* Need both Tx chains/antennas to support MIMO */ |
9e295116 | 1263 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1264 | return -1; |
1265 | ||
e1623446 | 1266 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1267 | |
1268 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1269 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1270 | tbl->action = 0; |
d6e93399 | 1271 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 GC |
1272 | rate_mask = lq_sta->active_mimo2_rate; |
1273 | ||
e1a0c6b3 | 1274 | if (iwl_is_ht40_tx_allowed(priv, ctx, sta)) |
7aafef1c | 1275 | tbl->is_ht40 = 1; |
b481de9c | 1276 | else |
7aafef1c | 1277 | tbl->is_ht40 = 0; |
b481de9c | 1278 | |
eecd6e57 | 1279 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1280 | |
f935a6da | 1281 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1282 | |
e1623446 | 1283 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
584a0f00 WYG |
1284 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
1285 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", | |
1286 | rate, rate_mask); | |
1287 | return -1; | |
1288 | } | |
1289 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); | |
1290 | ||
1291 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", | |
1292 | tbl->current_rate, is_green); | |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | /* | |
1297 | * Set up search table for MIMO3 | |
1298 | */ | |
1299 | static int rs_switch_to_mimo3(struct iwl_priv *priv, | |
1300 | struct iwl_lq_sta *lq_sta, | |
1301 | struct ieee80211_conf *conf, | |
1302 | struct ieee80211_sta *sta, | |
1303 | struct iwl_scale_tbl_info *tbl, int index) | |
1304 | { | |
1305 | u16 rate_mask; | |
1306 | s32 rate; | |
1307 | s8 is_green = lq_sta->is_green; | |
7e6a5886 | 1308 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 1309 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
584a0f00 WYG |
1310 | |
1311 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1312 | return -1; | |
1313 | ||
af0ed69b | 1314 | if (sta->smps_mode == IEEE80211_SMPS_STATIC) |
584a0f00 WYG |
1315 | return -1; |
1316 | ||
1317 | /* Need both Tx chains/antennas to support MIMO */ | |
9e295116 | 1318 | if (priv->hw_params.tx_chains_num < 3) |
584a0f00 WYG |
1319 | return -1; |
1320 | ||
1321 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); | |
1322 | ||
1323 | tbl->lq_type = LQ_MIMO3; | |
1324 | tbl->is_dup = lq_sta->is_dup; | |
1325 | tbl->action = 0; | |
d6e93399 | 1326 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; |
584a0f00 WYG |
1327 | rate_mask = lq_sta->active_mimo3_rate; |
1328 | ||
e1a0c6b3 | 1329 | if (iwl_is_ht40_tx_allowed(priv, ctx, sta)) |
7aafef1c | 1330 | tbl->is_ht40 = 1; |
584a0f00 | 1331 | else |
7aafef1c | 1332 | tbl->is_ht40 = 0; |
39e88504 | 1333 | |
584a0f00 WYG |
1334 | rs_set_expected_tpt_table(lq_sta, tbl); |
1335 | ||
1336 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); | |
1337 | ||
1338 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n", | |
1339 | rate, rate_mask); | |
39e88504 | 1340 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1341 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
39e88504 | 1342 | rate, rate_mask); |
b481de9c | 1343 | return -1; |
39e88504 | 1344 | } |
978785a3 | 1345 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
b481de9c | 1346 | |
e1623446 | 1347 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1348 | tbl->current_rate, is_green); |
dc2453ae | 1349 | return 0; |
fde0db31 | 1350 | } |
b481de9c | 1351 | |
77626355 BC |
1352 | /* |
1353 | * Set up search table for SISO | |
1354 | */ | |
c79dd5b5 | 1355 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1356 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1357 | struct ieee80211_conf *conf, |
4b7679a5 | 1358 | struct ieee80211_sta *sta, |
e227ceac | 1359 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1360 | { |
b481de9c | 1361 | u16 rate_mask; |
c33104f0 | 1362 | u8 is_green = lq_sta->is_green; |
b481de9c | 1363 | s32 rate; |
7e6a5886 | 1364 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 1365 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
b481de9c | 1366 | |
de27e64e | 1367 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1368 | return -1; |
1369 | ||
e1623446 | 1370 | IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n"); |
39e88504 | 1371 | |
c33104f0 | 1372 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1373 | tbl->lq_type = LQ_SISO; |
1374 | tbl->action = 0; | |
d6e93399 | 1375 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 | 1376 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1377 | |
e1a0c6b3 | 1378 | if (iwl_is_ht40_tx_allowed(priv, ctx, sta)) |
7aafef1c | 1379 | tbl->is_ht40 = 1; |
b481de9c | 1380 | else |
7aafef1c | 1381 | tbl->is_ht40 = 0; |
b481de9c | 1382 | |
b481de9c | 1383 | if (is_green) |
39e88504 | 1384 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1385 | |
eecd6e57 | 1386 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1387 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1388 | |
e1623446 | 1389 | IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1390 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1391 | IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1392 | rate, rate_mask); |
1393 | return -1; | |
1394 | } | |
978785a3 | 1395 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
e1623446 | 1396 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1397 | tbl->current_rate, is_green); |
403ab56b | 1398 | return 0; |
b481de9c ZY |
1399 | } |
1400 | ||
77626355 BC |
1401 | /* |
1402 | * Try to switch to new modulation mode from legacy | |
1403 | */ | |
48ed7040 NK |
1404 | static void rs_move_legacy_other(struct iwl_priv *priv, |
1405 | struct iwl_lq_sta *lq_sta, | |
1406 | struct ieee80211_conf *conf, | |
1407 | struct ieee80211_sta *sta, | |
1408 | int index) | |
b481de9c | 1409 | { |
e227ceac TW |
1410 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1411 | struct iwl_scale_tbl_info *search_tbl = | |
1412 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1413 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1414 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1415 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b1a78858 | 1416 | u8 start_action; |
b7998c8b | 1417 | u8 valid_tx_ant = priv->nvm_data->valid_tx_ant; |
9e295116 | 1418 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1419 | int ret = 0; |
d6e93399 | 1420 | u8 update_search_tbl_counter = 0; |
b481de9c | 1421 | |
290f599c JB |
1422 | switch (priv->bt_traffic_load) { |
1423 | case IWL_BT_COEX_TRAFFIC_LOAD_NONE: | |
1424 | /* nothing */ | |
1425 | break; | |
1426 | case IWL_BT_COEX_TRAFFIC_LOAD_LOW: | |
1427 | /* avoid antenna B unless MIMO */ | |
1428 | if (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2) | |
383b0874 | 1429 | tbl->action = IWL_LEGACY_SWITCH_SISO; |
290f599c JB |
1430 | break; |
1431 | case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: | |
1432 | case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: | |
1433 | /* avoid antenna B and MIMO */ | |
d6189124 | 1434 | valid_tx_ant = |
b7998c8b | 1435 | first_antenna(priv->nvm_data->valid_tx_ant); |
290f599c JB |
1436 | if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2 && |
1437 | tbl->action != IWL_LEGACY_SWITCH_SISO) | |
da5dbb97 | 1438 | tbl->action = IWL_LEGACY_SWITCH_SISO; |
290f599c JB |
1439 | break; |
1440 | default: | |
3c6acb61 | 1441 | IWL_ERR(priv, "Invalid BT load %d\n", priv->bt_traffic_load); |
290f599c JB |
1442 | break; |
1443 | } | |
1444 | ||
46f9381a WYG |
1445 | if (!iwl_ht_enabled(priv)) |
1446 | /* stay in Legacy */ | |
1447 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
3ad3b92a | 1448 | else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1449 | tbl->action > IWL_LEGACY_SWITCH_SISO) |
1450 | tbl->action = IWL_LEGACY_SWITCH_SISO; | |
bee008b7 WYG |
1451 | |
1452 | /* configure as 1x1 if bt full concurrency */ | |
1453 | if (priv->bt_full_concurrent) { | |
1454 | if (!iwl_ht_enabled(priv)) | |
1455 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
1456 | else if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2) | |
1457 | tbl->action = IWL_LEGACY_SWITCH_SISO; | |
d6189124 | 1458 | valid_tx_ant = |
b7998c8b | 1459 | first_antenna(priv->nvm_data->valid_tx_ant); |
bee008b7 WYG |
1460 | } |
1461 | ||
b1a78858 | 1462 | start_action = tbl->action; |
b481de9c | 1463 | for (; ;) { |
d6e93399 | 1464 | lq_sta->action_counter++; |
b481de9c | 1465 | switch (tbl->action) { |
3110bef7 GC |
1466 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1467 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
e1623446 | 1468 | IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
b481de9c | 1469 | |
3110bef7 GC |
1470 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1471 | tx_chains_num <= 1) || | |
1472 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1473 | tx_chains_num <= 2)) | |
1474 | break; | |
1475 | ||
77626355 | 1476 | /* Don't change antenna if success has been great */ |
da5dbb97 WYG |
1477 | if (window->success_ratio >= IWL_RS_GOOD_RATIO && |
1478 | !priv->bt_full_concurrent && | |
1479 | priv->bt_traffic_load == | |
1480 | IWL_BT_COEX_TRAFFIC_LOAD_NONE) | |
b481de9c | 1481 | break; |
77626355 | 1482 | |
77626355 | 1483 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1484 | memcpy(search_tbl, tbl, sz); |
1485 | ||
aade00ce GC |
1486 | if (rs_toggle_antenna(valid_tx_ant, |
1487 | &search_tbl->current_rate, search_tbl)) { | |
d6e93399 | 1488 | update_search_tbl_counter = 1; |
3110bef7 | 1489 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1490 | goto out; |
1491 | } | |
a5e8b505 | 1492 | break; |
b481de9c | 1493 | case IWL_LEGACY_SWITCH_SISO: |
e1623446 | 1494 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
77626355 BC |
1495 | |
1496 | /* Set up search table to try SISO */ | |
b481de9c | 1497 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1498 | search_tbl->is_SGI = 0; |
c33104f0 | 1499 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1500 | search_tbl, index); |
dc2453ae | 1501 | if (!ret) { |
c33104f0 | 1502 | lq_sta->action_counter = 0; |
b481de9c | 1503 | goto out; |
dc2453ae | 1504 | } |
b481de9c ZY |
1505 | |
1506 | break; | |
3110bef7 GC |
1507 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1508 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1509 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
e1623446 | 1510 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1511 | |
1512 | /* Set up search table to try MIMO */ | |
b481de9c | 1513 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1514 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1515 | |
1516 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1517 | search_tbl->ant_type = ANT_AB; | |
1518 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1519 | search_tbl->ant_type = ANT_AC; | |
1520 | else | |
1521 | search_tbl->ant_type = ANT_BC; | |
1522 | ||
1523 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1524 | break; | |
1525 | ||
fde0db31 | 1526 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1527 | search_tbl, index); |
dc2453ae | 1528 | if (!ret) { |
c33104f0 | 1529 | lq_sta->action_counter = 0; |
b481de9c | 1530 | goto out; |
dc2453ae | 1531 | } |
b481de9c | 1532 | break; |
584a0f00 WYG |
1533 | |
1534 | case IWL_LEGACY_SWITCH_MIMO3_ABC: | |
1535 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); | |
1536 | ||
1537 | /* Set up search table to try MIMO3 */ | |
1538 | memcpy(search_tbl, tbl, sz); | |
1539 | search_tbl->is_SGI = 0; | |
1540 | ||
1541 | search_tbl->ant_type = ANT_ABC; | |
1542 | ||
1543 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1544 | break; | |
1545 | ||
1546 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1547 | search_tbl, index); | |
1548 | if (!ret) { | |
1549 | lq_sta->action_counter = 0; | |
1550 | goto out; | |
1551 | } | |
1552 | break; | |
b481de9c ZY |
1553 | } |
1554 | tbl->action++; | |
584a0f00 | 1555 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1556 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
b481de9c ZY |
1557 | |
1558 | if (tbl->action == start_action) | |
1559 | break; | |
1560 | ||
1561 | } | |
3110bef7 | 1562 | search_tbl->lq_type = LQ_NONE; |
48ed7040 | 1563 | return; |
b481de9c | 1564 | |
3110bef7 GC |
1565 | out: |
1566 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1567 | tbl->action++; |
584a0f00 | 1568 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1569 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
d6e93399 MA |
1570 | if (update_search_tbl_counter) |
1571 | search_tbl->action = tbl->action; | |
b481de9c ZY |
1572 | } |
1573 | ||
77626355 BC |
1574 | /* |
1575 | * Try to switch to new modulation mode from SISO | |
1576 | */ | |
48ed7040 NK |
1577 | static void rs_move_siso_to_other(struct iwl_priv *priv, |
1578 | struct iwl_lq_sta *lq_sta, | |
1579 | struct ieee80211_conf *conf, | |
1580 | struct ieee80211_sta *sta, int index) | |
b481de9c | 1581 | { |
c33104f0 | 1582 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1583 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1584 | struct iwl_scale_tbl_info *search_tbl = | |
1585 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1586 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1587 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1588 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1589 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b1a78858 | 1590 | u8 start_action; |
b7998c8b | 1591 | u8 valid_tx_ant = priv->nvm_data->valid_tx_ant; |
9e295116 | 1592 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
d6e93399 | 1593 | u8 update_search_tbl_counter = 0; |
fde0db31 | 1594 | int ret; |
b481de9c | 1595 | |
290f599c JB |
1596 | switch (priv->bt_traffic_load) { |
1597 | case IWL_BT_COEX_TRAFFIC_LOAD_NONE: | |
1598 | /* nothing */ | |
1599 | break; | |
1600 | case IWL_BT_COEX_TRAFFIC_LOAD_LOW: | |
1601 | /* avoid antenna B unless MIMO */ | |
1602 | if (tbl->action == IWL_SISO_SWITCH_ANTENNA2) | |
383b0874 | 1603 | tbl->action = IWL_SISO_SWITCH_MIMO2_AB; |
290f599c JB |
1604 | break; |
1605 | case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: | |
1606 | case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: | |
1607 | /* avoid antenna B and MIMO */ | |
d6189124 | 1608 | valid_tx_ant = |
b7998c8b | 1609 | first_antenna(priv->nvm_data->valid_tx_ant); |
da5dbb97 | 1610 | if (tbl->action != IWL_SISO_SWITCH_ANTENNA1) |
290f599c JB |
1611 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
1612 | break; | |
1613 | default: | |
3c6acb61 | 1614 | IWL_ERR(priv, "Invalid BT load %d\n", priv->bt_traffic_load); |
290f599c JB |
1615 | break; |
1616 | } | |
1617 | ||
3ad3b92a | 1618 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1619 | tbl->action > IWL_SISO_SWITCH_ANTENNA2) { |
1620 | /* stay in SISO */ | |
1621 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; | |
1622 | } | |
bee008b7 WYG |
1623 | |
1624 | /* configure as 1x1 if bt full concurrency */ | |
da5dbb97 | 1625 | if (priv->bt_full_concurrent) { |
d6189124 | 1626 | valid_tx_ant = |
b7998c8b | 1627 | first_antenna(priv->nvm_data->valid_tx_ant); |
da5dbb97 WYG |
1628 | if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2) |
1629 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; | |
1630 | } | |
bee008b7 | 1631 | |
b1a78858 | 1632 | start_action = tbl->action; |
b481de9c | 1633 | for (;;) { |
c33104f0 | 1634 | lq_sta->action_counter++; |
b481de9c | 1635 | switch (tbl->action) { |
3110bef7 GC |
1636 | case IWL_SISO_SWITCH_ANTENNA1: |
1637 | case IWL_SISO_SWITCH_ANTENNA2: | |
e1623446 | 1638 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
3110bef7 | 1639 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && |
da5dbb97 | 1640 | tx_chains_num <= 1) || |
3110bef7 | 1641 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && |
da5dbb97 | 1642 | tx_chains_num <= 2)) |
3110bef7 GC |
1643 | break; |
1644 | ||
da5dbb97 WYG |
1645 | if (window->success_ratio >= IWL_RS_GOOD_RATIO && |
1646 | !priv->bt_full_concurrent && | |
1647 | priv->bt_traffic_load == | |
1648 | IWL_BT_COEX_TRAFFIC_LOAD_NONE) | |
b481de9c | 1649 | break; |
b481de9c ZY |
1650 | |
1651 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1652 | if (rs_toggle_antenna(valid_tx_ant, |
d6e93399 MA |
1653 | &search_tbl->current_rate, search_tbl)) { |
1654 | update_search_tbl_counter = 1; | |
aade00ce | 1655 | goto out; |
d6e93399 | 1656 | } |
a5e8b505 | 1657 | break; |
3110bef7 GC |
1658 | case IWL_SISO_SWITCH_MIMO2_AB: |
1659 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1660 | case IWL_SISO_SWITCH_MIMO2_BC: | |
e1623446 | 1661 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
b481de9c | 1662 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1663 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1664 | |
1665 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1666 | search_tbl->ant_type = ANT_AB; | |
1667 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1668 | search_tbl->ant_type = ANT_AC; | |
1669 | else | |
1670 | search_tbl->ant_type = ANT_BC; | |
1671 | ||
1672 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1673 | break; | |
1674 | ||
fde0db31 | 1675 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1676 | search_tbl, index); |
3110bef7 | 1677 | if (!ret) |
b481de9c ZY |
1678 | goto out; |
1679 | break; | |
1680 | case IWL_SISO_SWITCH_GI: | |
28e6f489 DH |
1681 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1682 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1683 | break; |
28e6f489 DH |
1684 | if (tbl->is_ht40 && !(ht_cap->cap & |
1685 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1686 | break; |
1687 | ||
e1623446 | 1688 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1689 | |
b481de9c | 1690 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1691 | if (is_green) { |
1692 | if (!tbl->is_SGI) | |
1693 | break; | |
1694 | else | |
15b1687c WT |
1695 | IWL_ERR(priv, |
1696 | "SGI was set in GF+SISO\n"); | |
b481de9c | 1697 | } |
39e88504 | 1698 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1699 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1700 | if (tbl->is_SGI) { |
1701 | s32 tpt = lq_sta->last_tpt / 100; | |
1702 | if (tpt >= search_tbl->expected_tpt[index]) | |
1703 | break; | |
1704 | } | |
978785a3 TW |
1705 | search_tbl->current_rate = |
1706 | rate_n_flags_from_tbl(priv, search_tbl, | |
1707 | index, is_green); | |
d6e93399 | 1708 | update_search_tbl_counter = 1; |
b481de9c | 1709 | goto out; |
584a0f00 WYG |
1710 | case IWL_SISO_SWITCH_MIMO3_ABC: |
1711 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); | |
1712 | memcpy(search_tbl, tbl, sz); | |
1713 | search_tbl->is_SGI = 0; | |
1714 | search_tbl->ant_type = ANT_ABC; | |
1715 | ||
1716 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1717 | break; | |
1718 | ||
1719 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1720 | search_tbl, index); | |
1721 | if (!ret) | |
1722 | goto out; | |
1723 | break; | |
b481de9c ZY |
1724 | } |
1725 | tbl->action++; | |
584a0f00 | 1726 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1727 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1728 | |
1729 | if (tbl->action == start_action) | |
1730 | break; | |
1731 | } | |
3110bef7 | 1732 | search_tbl->lq_type = LQ_NONE; |
48ed7040 | 1733 | return; |
b481de9c ZY |
1734 | |
1735 | out: | |
3110bef7 | 1736 | lq_sta->search_better_tbl = 1; |
b481de9c | 1737 | tbl->action++; |
584a0f00 | 1738 | if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC) |
3110bef7 | 1739 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
d6e93399 MA |
1740 | if (update_search_tbl_counter) |
1741 | search_tbl->action = tbl->action; | |
b481de9c ZY |
1742 | } |
1743 | ||
77626355 | 1744 | /* |
584a0f00 | 1745 | * Try to switch to new modulation mode from MIMO2 |
77626355 | 1746 | */ |
48ed7040 NK |
1747 | static void rs_move_mimo2_to_other(struct iwl_priv *priv, |
1748 | struct iwl_lq_sta *lq_sta, | |
1749 | struct ieee80211_conf *conf, | |
1750 | struct ieee80211_sta *sta, int index) | |
b481de9c | 1751 | { |
c33104f0 | 1752 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1753 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1754 | struct iwl_scale_tbl_info *search_tbl = | |
1755 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1756 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
28e6f489 | 1757 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1758 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1759 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b1a78858 | 1760 | u8 start_action; |
b7998c8b | 1761 | u8 valid_tx_ant = priv->nvm_data->valid_tx_ant; |
9e295116 | 1762 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
d6e93399 | 1763 | u8 update_search_tbl_counter = 0; |
aade00ce | 1764 | int ret; |
b481de9c | 1765 | |
290f599c JB |
1766 | switch (priv->bt_traffic_load) { |
1767 | case IWL_BT_COEX_TRAFFIC_LOAD_NONE: | |
1768 | /* nothing */ | |
1769 | break; | |
1770 | case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: | |
1771 | case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: | |
1772 | /* avoid antenna B and MIMO */ | |
da5dbb97 WYG |
1773 | if (tbl->action != IWL_MIMO2_SWITCH_SISO_A) |
1774 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1775 | break; | |
290f599c JB |
1776 | case IWL_BT_COEX_TRAFFIC_LOAD_LOW: |
1777 | /* avoid antenna B unless MIMO */ | |
da5dbb97 WYG |
1778 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_B || |
1779 | tbl->action == IWL_MIMO2_SWITCH_SISO_C) | |
290f599c JB |
1780 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; |
1781 | break; | |
1782 | default: | |
3c6acb61 | 1783 | IWL_ERR(priv, "Invalid BT load %d\n", priv->bt_traffic_load); |
290f599c JB |
1784 | break; |
1785 | } | |
1786 | ||
3ad3b92a | 1787 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1788 | (tbl->action < IWL_MIMO2_SWITCH_SISO_A || |
1789 | tbl->action > IWL_MIMO2_SWITCH_SISO_C)) { | |
1790 | /* switch in SISO */ | |
1791 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1792 | } | |
bee008b7 WYG |
1793 | |
1794 | /* configure as 1x1 if bt full concurrency */ | |
1795 | if (priv->bt_full_concurrent && | |
1796 | (tbl->action < IWL_MIMO2_SWITCH_SISO_A || | |
1797 | tbl->action > IWL_MIMO2_SWITCH_SISO_C)) | |
1798 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1799 | ||
b1a78858 | 1800 | start_action = tbl->action; |
b481de9c | 1801 | for (;;) { |
c33104f0 | 1802 | lq_sta->action_counter++; |
b481de9c | 1803 | switch (tbl->action) { |
3110bef7 GC |
1804 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1805 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
584a0f00 | 1806 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); |
3110bef7 GC |
1807 | |
1808 | if (tx_chains_num <= 2) | |
1809 | break; | |
1810 | ||
1811 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1812 | break; | |
1813 | ||
1814 | memcpy(search_tbl, tbl, sz); | |
1815 | if (rs_toggle_antenna(valid_tx_ant, | |
d6e93399 MA |
1816 | &search_tbl->current_rate, search_tbl)) { |
1817 | update_search_tbl_counter = 1; | |
3110bef7 | 1818 | goto out; |
d6e93399 | 1819 | } |
3110bef7 GC |
1820 | break; |
1821 | case IWL_MIMO2_SWITCH_SISO_A: | |
1822 | case IWL_MIMO2_SWITCH_SISO_B: | |
1823 | case IWL_MIMO2_SWITCH_SISO_C: | |
e1623446 | 1824 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1825 | |
77626355 | 1826 | /* Set up new search table for SISO */ |
b481de9c | 1827 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1828 | |
3110bef7 | 1829 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1830 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1831 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1832 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1833 | else |
1834 | search_tbl->ant_type = ANT_C; | |
1835 | ||
1836 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1837 | break; | |
b481de9c | 1838 | |
c33104f0 | 1839 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1840 | search_tbl, index); |
3110bef7 | 1841 | if (!ret) |
b481de9c | 1842 | goto out; |
3110bef7 | 1843 | |
b481de9c ZY |
1844 | break; |
1845 | ||
3110bef7 | 1846 | case IWL_MIMO2_SWITCH_GI: |
28e6f489 DH |
1847 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1848 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1849 | break; |
28e6f489 DH |
1850 | if (tbl->is_ht40 && !(ht_cap->cap & |
1851 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1852 | break; |
1853 | ||
584a0f00 | 1854 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); |
77626355 | 1855 | |
584a0f00 | 1856 | /* Set up new search table for MIMO2 */ |
b481de9c | 1857 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1858 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1859 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1860 | /* |
1861 | * If active table already uses the fastest possible | |
1862 | * modulation (dual stream with short guard interval), | |
1863 | * and it's working well, there's no need to look | |
1864 | * for a better type of modulation! | |
1865 | */ | |
39e88504 | 1866 | if (tbl->is_SGI) { |
c33104f0 | 1867 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1868 | if (tpt >= search_tbl->expected_tpt[index]) |
1869 | break; | |
b481de9c | 1870 | } |
978785a3 TW |
1871 | search_tbl->current_rate = |
1872 | rate_n_flags_from_tbl(priv, search_tbl, | |
1873 | index, is_green); | |
d6e93399 | 1874 | update_search_tbl_counter = 1; |
b481de9c ZY |
1875 | goto out; |
1876 | ||
584a0f00 WYG |
1877 | case IWL_MIMO2_SWITCH_MIMO3_ABC: |
1878 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); | |
1879 | memcpy(search_tbl, tbl, sz); | |
1880 | search_tbl->is_SGI = 0; | |
1881 | search_tbl->ant_type = ANT_ABC; | |
1882 | ||
1883 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1884 | break; | |
1885 | ||
1886 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1887 | search_tbl, index); | |
1888 | if (!ret) | |
1889 | goto out; | |
1890 | ||
1891 | break; | |
b481de9c ZY |
1892 | } |
1893 | tbl->action++; | |
584a0f00 | 1894 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1895 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
b481de9c ZY |
1896 | |
1897 | if (tbl->action == start_action) | |
1898 | break; | |
1899 | } | |
3110bef7 | 1900 | search_tbl->lq_type = LQ_NONE; |
48ed7040 | 1901 | return; |
b481de9c | 1902 | out: |
3110bef7 | 1903 | lq_sta->search_better_tbl = 1; |
b481de9c | 1904 | tbl->action++; |
584a0f00 | 1905 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1906 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
d6e93399 MA |
1907 | if (update_search_tbl_counter) |
1908 | search_tbl->action = tbl->action; | |
1909 | ||
b481de9c ZY |
1910 | } |
1911 | ||
584a0f00 WYG |
1912 | /* |
1913 | * Try to switch to new modulation mode from MIMO3 | |
1914 | */ | |
48ed7040 NK |
1915 | static void rs_move_mimo3_to_other(struct iwl_priv *priv, |
1916 | struct iwl_lq_sta *lq_sta, | |
1917 | struct ieee80211_conf *conf, | |
1918 | struct ieee80211_sta *sta, int index) | |
584a0f00 WYG |
1919 | { |
1920 | s8 is_green = lq_sta->is_green; | |
1921 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1922 | struct iwl_scale_tbl_info *search_tbl = | |
1923 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1924 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1925 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
584a0f00 WYG |
1926 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1927 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b1a78858 | 1928 | u8 start_action; |
b7998c8b | 1929 | u8 valid_tx_ant = priv->nvm_data->valid_tx_ant; |
9e295116 | 1930 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
584a0f00 | 1931 | int ret; |
d6e93399 | 1932 | u8 update_search_tbl_counter = 0; |
584a0f00 | 1933 | |
290f599c JB |
1934 | switch (priv->bt_traffic_load) { |
1935 | case IWL_BT_COEX_TRAFFIC_LOAD_NONE: | |
1936 | /* nothing */ | |
1937 | break; | |
1938 | case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: | |
1939 | case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: | |
1940 | /* avoid antenna B and MIMO */ | |
da5dbb97 | 1941 | if (tbl->action != IWL_MIMO3_SWITCH_SISO_A) |
290f599c | 1942 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; |
da5dbb97 | 1943 | break; |
290f599c JB |
1944 | case IWL_BT_COEX_TRAFFIC_LOAD_LOW: |
1945 | /* avoid antenna B unless MIMO */ | |
da5dbb97 WYG |
1946 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_B || |
1947 | tbl->action == IWL_MIMO3_SWITCH_SISO_C) | |
290f599c | 1948 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; |
290f599c JB |
1949 | break; |
1950 | default: | |
3c6acb61 | 1951 | IWL_ERR(priv, "Invalid BT load %d\n", priv->bt_traffic_load); |
290f599c JB |
1952 | break; |
1953 | } | |
1954 | ||
3ad3b92a | 1955 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1956 | (tbl->action < IWL_MIMO3_SWITCH_SISO_A || |
1957 | tbl->action > IWL_MIMO3_SWITCH_SISO_C)) { | |
1958 | /* switch in SISO */ | |
1959 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; | |
1960 | } | |
bee008b7 WYG |
1961 | |
1962 | /* configure as 1x1 if bt full concurrency */ | |
1963 | if (priv->bt_full_concurrent && | |
1964 | (tbl->action < IWL_MIMO3_SWITCH_SISO_A || | |
1965 | tbl->action > IWL_MIMO3_SWITCH_SISO_C)) | |
1966 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; | |
1967 | ||
b1a78858 | 1968 | start_action = tbl->action; |
584a0f00 WYG |
1969 | for (;;) { |
1970 | lq_sta->action_counter++; | |
1971 | switch (tbl->action) { | |
1972 | case IWL_MIMO3_SWITCH_ANTENNA1: | |
1973 | case IWL_MIMO3_SWITCH_ANTENNA2: | |
1974 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); | |
1975 | ||
1976 | if (tx_chains_num <= 3) | |
1977 | break; | |
1978 | ||
1979 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1980 | break; | |
1981 | ||
1982 | memcpy(search_tbl, tbl, sz); | |
1983 | if (rs_toggle_antenna(valid_tx_ant, | |
1984 | &search_tbl->current_rate, search_tbl)) | |
1985 | goto out; | |
1986 | break; | |
1987 | case IWL_MIMO3_SWITCH_SISO_A: | |
1988 | case IWL_MIMO3_SWITCH_SISO_B: | |
1989 | case IWL_MIMO3_SWITCH_SISO_C: | |
1990 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); | |
1991 | ||
1992 | /* Set up new search table for SISO */ | |
1993 | memcpy(search_tbl, tbl, sz); | |
1994 | ||
1995 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) | |
1996 | search_tbl->ant_type = ANT_A; | |
1997 | else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) | |
1998 | search_tbl->ant_type = ANT_B; | |
1999 | else | |
2000 | search_tbl->ant_type = ANT_C; | |
2001 | ||
2002 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
2003 | break; | |
2004 | ||
2005 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, | |
2006 | search_tbl, index); | |
2007 | if (!ret) | |
2008 | goto out; | |
2009 | ||
2010 | break; | |
2011 | ||
2012 | case IWL_MIMO3_SWITCH_MIMO2_AB: | |
2013 | case IWL_MIMO3_SWITCH_MIMO2_AC: | |
2014 | case IWL_MIMO3_SWITCH_MIMO2_BC: | |
2015 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); | |
2016 | ||
2017 | memcpy(search_tbl, tbl, sz); | |
2018 | search_tbl->is_SGI = 0; | |
2019 | if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) | |
2020 | search_tbl->ant_type = ANT_AB; | |
2021 | else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) | |
2022 | search_tbl->ant_type = ANT_AC; | |
2023 | else | |
2024 | search_tbl->ant_type = ANT_BC; | |
2025 | ||
2026 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
2027 | break; | |
2028 | ||
2029 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
2030 | search_tbl, index); | |
2031 | if (!ret) | |
2032 | goto out; | |
2033 | ||
2034 | break; | |
2035 | ||
2036 | case IWL_MIMO3_SWITCH_GI: | |
28e6f489 DH |
2037 | if (!tbl->is_ht40 && !(ht_cap->cap & |
2038 | IEEE80211_HT_CAP_SGI_20)) | |
584a0f00 | 2039 | break; |
28e6f489 DH |
2040 | if (tbl->is_ht40 && !(ht_cap->cap & |
2041 | IEEE80211_HT_CAP_SGI_40)) | |
584a0f00 WYG |
2042 | break; |
2043 | ||
2044 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); | |
2045 | ||
2046 | /* Set up new search table for MIMO */ | |
2047 | memcpy(search_tbl, tbl, sz); | |
2048 | search_tbl->is_SGI = !tbl->is_SGI; | |
2049 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
2050 | /* | |
2051 | * If active table already uses the fastest possible | |
2052 | * modulation (dual stream with short guard interval), | |
2053 | * and it's working well, there's no need to look | |
2054 | * for a better type of modulation! | |
2055 | */ | |
2056 | if (tbl->is_SGI) { | |
2057 | s32 tpt = lq_sta->last_tpt / 100; | |
2058 | if (tpt >= search_tbl->expected_tpt[index]) | |
2059 | break; | |
2060 | } | |
2061 | search_tbl->current_rate = | |
2062 | rate_n_flags_from_tbl(priv, search_tbl, | |
2063 | index, is_green); | |
d6e93399 | 2064 | update_search_tbl_counter = 1; |
584a0f00 WYG |
2065 | goto out; |
2066 | } | |
2067 | tbl->action++; | |
2068 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
2069 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
2070 | ||
2071 | if (tbl->action == start_action) | |
2072 | break; | |
2073 | } | |
2074 | search_tbl->lq_type = LQ_NONE; | |
48ed7040 | 2075 | return; |
584a0f00 WYG |
2076 | out: |
2077 | lq_sta->search_better_tbl = 1; | |
2078 | tbl->action++; | |
2079 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
2080 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
d6e93399 MA |
2081 | if (update_search_tbl_counter) |
2082 | search_tbl->action = tbl->action; | |
584a0f00 WYG |
2083 | } |
2084 | ||
77626355 BC |
2085 | /* |
2086 | * Check whether we should continue using same modulation mode, or | |
2087 | * begin search for a new mode, based on: | |
2088 | * 1) # tx successes or failures while using this mode | |
2089 | * 2) # times calling this function | |
2090 | * 3) elapsed time in this mode (not used, for now) | |
2091 | */ | |
da5dbb97 | 2092 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) |
b481de9c | 2093 | { |
e227ceac | 2094 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
2095 | int i; |
2096 | int active_tbl; | |
2097 | int flush_interval_passed = 0; | |
bf403db8 | 2098 | struct iwl_priv *priv; |
b481de9c | 2099 | |
bf403db8 | 2100 | priv = lq_sta->drv; |
c33104f0 | 2101 | active_tbl = lq_sta->active_tbl; |
b481de9c | 2102 | |
c33104f0 | 2103 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 2104 | |
77626355 | 2105 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 2106 | if (lq_sta->stay_in_tbl) { |
b481de9c | 2107 | |
77626355 | 2108 | /* Elapsed time using current modulation mode */ |
c33104f0 | 2109 | if (lq_sta->flush_timer) |
b481de9c | 2110 | flush_interval_passed = |
447fee70 MA |
2111 | time_after(jiffies, |
2112 | (unsigned long)(lq_sta->flush_timer + | |
b481de9c ZY |
2113 | IWL_RATE_SCALE_FLUSH_INTVL)); |
2114 | ||
77626355 BC |
2115 | /* |
2116 | * Check if we should allow search for new modulation mode. | |
2117 | * If many frames have failed or succeeded, or we've used | |
2118 | * this same modulation for a long time, allow search, and | |
2119 | * reset history stats that keep track of whether we should | |
2120 | * allow a new search. Also (below) reset all bitmaps and | |
2121 | * stats in active history. | |
2122 | */ | |
da5dbb97 WYG |
2123 | if (force_search || |
2124 | (lq_sta->total_failed > lq_sta->max_failure_limit) || | |
c33104f0 TW |
2125 | (lq_sta->total_success > lq_sta->max_success_limit) || |
2126 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 2127 | && (flush_interval_passed))) { |
0ca24daf | 2128 | IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n", |
c33104f0 TW |
2129 | lq_sta->total_failed, |
2130 | lq_sta->total_success, | |
b481de9c | 2131 | flush_interval_passed); |
77626355 BC |
2132 | |
2133 | /* Allow search for new mode */ | |
c33104f0 TW |
2134 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
2135 | lq_sta->total_failed = 0; | |
2136 | lq_sta->total_success = 0; | |
2137 | lq_sta->flush_timer = 0; | |
77626355 BC |
2138 | |
2139 | /* | |
2140 | * Else if we've used this modulation mode enough repetitions | |
2141 | * (regardless of elapsed time or success/failure), reset | |
2142 | * history bitmaps and rate-specific stats for all rates in | |
2143 | * active table. | |
2144 | */ | |
403ab56b | 2145 | } else { |
c33104f0 TW |
2146 | lq_sta->table_count++; |
2147 | if (lq_sta->table_count >= | |
2148 | lq_sta->table_count_limit) { | |
2149 | lq_sta->table_count = 0; | |
b481de9c | 2150 | |
e1623446 | 2151 | IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
b481de9c ZY |
2152 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2153 | rs_rate_scale_clear_window( | |
2154 | &(tbl->win[i])); | |
2155 | } | |
2156 | } | |
2157 | ||
77626355 BC |
2158 | /* If transitioning to allow "search", reset all history |
2159 | * bitmaps and stats in active table (this will become the new | |
2160 | * "search" table). */ | |
c33104f0 | 2161 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
2162 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2163 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2164 | } | |
2165 | } | |
2166 | } | |
2167 | ||
e3139fe7 WYG |
2168 | /* |
2169 | * setup rate table in uCode | |
e3139fe7 | 2170 | */ |
70817b5e JB |
2171 | static void rs_update_rate_tbl(struct iwl_priv *priv, |
2172 | struct iwl_rxon_context *ctx, | |
2173 | struct iwl_lq_sta *lq_sta, | |
2174 | struct iwl_scale_tbl_info *tbl, | |
2175 | int index, u8 is_green) | |
e3139fe7 WYG |
2176 | { |
2177 | u32 rate; | |
2178 | ||
2179 | /* Update uCode's rate table. */ | |
2180 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); | |
2181 | rs_fill_link_cmd(priv, lq_sta, rate); | |
7e6a5886 | 2182 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
e3139fe7 WYG |
2183 | } |
2184 | ||
77626355 BC |
2185 | /* |
2186 | * Do rate scaling and search for new modulation mode. | |
2187 | */ | |
c79dd5b5 | 2188 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 2189 | struct sk_buff *skb, |
4b7679a5 JB |
2190 | struct ieee80211_sta *sta, |
2191 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2192 | { |
4b7679a5 | 2193 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 2194 | struct ieee80211_conf *conf = &hw->conf; |
514d65c1 GS |
2195 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2196 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
b481de9c ZY |
2197 | int low = IWL_RATE_INVALID; |
2198 | int high = IWL_RATE_INVALID; | |
2199 | int index; | |
2200 | int i; | |
e227ceac | 2201 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
2202 | int current_tpt = IWL_INVALID_VALUE; |
2203 | int low_tpt = IWL_INVALID_VALUE; | |
2204 | int high_tpt = IWL_INVALID_VALUE; | |
2205 | u32 fail_count; | |
2206 | s8 scale_action = 0; | |
fd7c8a40 | 2207 | u16 rate_mask; |
b481de9c | 2208 | u8 update_lq = 0; |
e227ceac | 2209 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 2210 | u16 rate_scale_index_msk = 0; |
b481de9c ZY |
2211 | u8 is_green = 0; |
2212 | u8 active_tbl = 0; | |
2213 | u8 done_search = 0; | |
2214 | u16 high_low; | |
a5e8b505 | 2215 | s32 sr; |
5f85a789 | 2216 | u8 tid = IWL_MAX_TID_COUNT; |
86b4766b | 2217 | struct iwl_tid_data *tid_data; |
7e6a5886 | 2218 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
c6892906 | 2219 | struct iwl_rxon_context *ctx = sta_priv->ctx; |
b481de9c | 2220 | |
e1623446 | 2221 | IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2222 | |
514d65c1 | 2223 | /* Send management frames and NO_ACK data using lowest rate. */ |
417f114b TW |
2224 | /* TODO: this could probably be improved.. */ |
2225 | if (!ieee80211_is_data(hdr->frame_control) || | |
514d65c1 | 2226 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c | 2227 | return; |
b481de9c | 2228 | |
4b7679a5 | 2229 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 2230 | |
faa29718 | 2231 | tid = rs_tl_add_packet(lq_sta, hdr); |
5f85a789 EG |
2232 | if ((tid != IWL_MAX_TID_COUNT) && |
2233 | (lq_sta->tx_agg_tid_en & (1 << tid))) { | |
04cf6824 | 2234 | tid_data = &priv->tid_data[lq_sta->lq.sta_id][tid]; |
e3949d62 DH |
2235 | if (tid_data->agg.state == IWL_AGG_OFF) |
2236 | lq_sta->is_agg = 0; | |
2237 | else | |
2238 | lq_sta->is_agg = 1; | |
2239 | } else | |
2240 | lq_sta->is_agg = 0; | |
faa29718 | 2241 | |
77626355 BC |
2242 | /* |
2243 | * Select rate-scale / modulation-mode table to work with in | |
2244 | * the rest of this function: "search" if searching for better | |
2245 | * modulation mode, or "active" if doing rate scaling within a mode. | |
2246 | */ | |
c33104f0 TW |
2247 | if (!lq_sta->search_better_tbl) |
2248 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2249 | else |
c33104f0 | 2250 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2251 | |
c33104f0 | 2252 | tbl = &(lq_sta->lq_info[active_tbl]); |
2681b20b WYG |
2253 | if (is_legacy(tbl->lq_type)) |
2254 | lq_sta->is_green = 0; | |
2255 | else | |
7e6a5886 | 2256 | lq_sta->is_green = rs_use_green(sta); |
c33104f0 | 2257 | is_green = lq_sta->is_green; |
b481de9c | 2258 | |
77626355 | 2259 | /* current tx rate */ |
b7e35008 | 2260 | index = lq_sta->last_txrate_idx; |
b481de9c | 2261 | |
e1623446 | 2262 | IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
b481de9c ZY |
2263 | tbl->lq_type); |
2264 | ||
77626355 | 2265 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 2266 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c | 2267 | |
91dd6c27 | 2268 | IWL_DEBUG_RATE(priv, "mask 0x%04X\n", rate_mask); |
b481de9c ZY |
2269 | |
2270 | /* mask with station rate restriction */ | |
2271 | if (is_legacy(tbl->lq_type)) { | |
57fbcce3 | 2272 | if (lq_sta->band == NL80211_BAND_5GHZ) |
77626355 | 2273 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 2274 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 2275 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
2276 | else |
2277 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 2278 | lq_sta->supp_rates); |
b481de9c ZY |
2279 | |
2280 | } else | |
2281 | rate_scale_index_msk = rate_mask; | |
2282 | ||
2283 | if (!rate_scale_index_msk) | |
2284 | rate_scale_index_msk = rate_mask; | |
2285 | ||
07bc28ed | 2286 | if (!((1 << index) & rate_scale_index_msk)) { |
15b1687c | 2287 | IWL_ERR(priv, "Current Rate is not valid\n"); |
e3139fe7 WYG |
2288 | if (lq_sta->search_better_tbl) { |
2289 | /* revert to active table if search table is not valid*/ | |
2290 | tbl->lq_type = LQ_NONE; | |
2291 | lq_sta->search_better_tbl = 0; | |
2292 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2293 | /* get "active" rate info */ | |
2294 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); | |
70817b5e JB |
2295 | rs_update_rate_tbl(priv, ctx, lq_sta, tbl, |
2296 | index, is_green); | |
e3139fe7 | 2297 | } |
07bc28ed | 2298 | return; |
b481de9c ZY |
2299 | } |
2300 | ||
77626355 | 2301 | /* Get expected throughput table and history window for current rate */ |
07bc28ed | 2302 | if (!tbl->expected_tpt) { |
15b1687c | 2303 | IWL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
07bc28ed GC |
2304 | return; |
2305 | } | |
b481de9c | 2306 | |
c6ec7a9b AM |
2307 | /* force user max rate if set by user */ |
2308 | if ((lq_sta->max_rate_idx != -1) && | |
2309 | (lq_sta->max_rate_idx < index)) { | |
2310 | index = lq_sta->max_rate_idx; | |
2311 | update_lq = 1; | |
2312 | window = &(tbl->win[index]); | |
2313 | goto lq_update; | |
2314 | } | |
2315 | ||
b481de9c ZY |
2316 | window = &(tbl->win[index]); |
2317 | ||
77626355 BC |
2318 | /* |
2319 | * If there is not enough history to calculate actual average | |
2320 | * throughput, keep analyzing results of more tx frames, without | |
2321 | * changing rate or mode (bypass most of the rest of this function). | |
2322 | * Set up new rate table in uCode only if old rate is not supported | |
2323 | * in current association (use new rate found above). | |
2324 | */ | |
b481de9c | 2325 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
2326 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
2327 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
e1623446 | 2328 | IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
b481de9c ZY |
2329 | "for index %d\n", |
2330 | window->success_counter, window->counter, index); | |
77626355 BC |
2331 | |
2332 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 2333 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
2334 | |
2335 | /* Should we stay with this modulation mode, | |
2336 | * or search for a new one? */ | |
da5dbb97 | 2337 | rs_stay_in_table(lq_sta, false); |
77626355 | 2338 | |
b481de9c | 2339 | goto out; |
3110bef7 | 2340 | } |
77626355 BC |
2341 | /* Else we have enough samples; calculate estimate of |
2342 | * actual average throughput */ | |
3d79b2a9 RC |
2343 | if (window->average_tpt != ((window->success_ratio * |
2344 | tbl->expected_tpt[index] + 64) / 128)) { | |
2345 | IWL_ERR(priv, "expected_tpt should have been calculated by now\n"); | |
2346 | window->average_tpt = ((window->success_ratio * | |
2347 | tbl->expected_tpt[index] + 64) / 128); | |
2348 | } | |
b481de9c | 2349 | |
77626355 | 2350 | /* If we are searching for better modulation mode, check success. */ |
46f9381a | 2351 | if (lq_sta->search_better_tbl && |
3ad3b92a | 2352 | (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) { |
77626355 BC |
2353 | /* If good success, continue using the "search" mode; |
2354 | * no need to send new link quality command, since we're | |
2355 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
2356 | if (window->average_tpt > lq_sta->last_tpt) { |
2357 | ||
e1623446 | 2358 | IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
2359 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2360 | window->success_ratio, | |
2361 | window->average_tpt, | |
2362 | lq_sta->last_tpt); | |
2363 | ||
2364 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 2365 | lq_sta->enable_counter = 1; |
07bc28ed | 2366 | |
77626355 | 2367 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 2368 | lq_sta->active_tbl = active_tbl; |
b481de9c | 2369 | current_tpt = window->average_tpt; |
77626355 BC |
2370 | |
2371 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 2372 | } else { |
07bc28ed | 2373 | |
e1623446 | 2374 | IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
07bc28ed GC |
2375 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2376 | window->success_ratio, | |
2377 | window->average_tpt, | |
2378 | lq_sta->last_tpt); | |
2379 | ||
77626355 | 2380 | /* Nullify "search" table */ |
b481de9c | 2381 | tbl->lq_type = LQ_NONE; |
77626355 BC |
2382 | |
2383 | /* Revert to "active" table */ | |
c33104f0 TW |
2384 | active_tbl = lq_sta->active_tbl; |
2385 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 2386 | |
77626355 | 2387 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 2388 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 2389 | current_tpt = lq_sta->last_tpt; |
b481de9c | 2390 | |
77626355 | 2391 | /* Need to set up a new rate table in uCode */ |
b481de9c | 2392 | update_lq = 1; |
b481de9c | 2393 | } |
77626355 BC |
2394 | |
2395 | /* Either way, we've made a decision; modulation mode | |
2396 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 2397 | lq_sta->search_better_tbl = 0; |
77626355 | 2398 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
2399 | goto lq_update; |
2400 | } | |
2401 | ||
77626355 BC |
2402 | /* (Else) not in search of better modulation mode, try for better |
2403 | * starting rate, while staying in this mode. */ | |
bf403db8 | 2404 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
2405 | tbl->lq_type); |
2406 | low = high_low & 0xff; | |
2407 | high = (high_low >> 8) & 0xff; | |
2408 | ||
c6ec7a9b AM |
2409 | /* If user set max rate, dont allow higher than user constrain */ |
2410 | if ((lq_sta->max_rate_idx != -1) && | |
2411 | (lq_sta->max_rate_idx < high)) | |
2412 | high = IWL_RATE_INVALID; | |
2413 | ||
a5e8b505 GC |
2414 | sr = window->success_ratio; |
2415 | ||
77626355 | 2416 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 2417 | current_tpt = window->average_tpt; |
b481de9c ZY |
2418 | if (low != IWL_RATE_INVALID) |
2419 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
2420 | if (high != IWL_RATE_INVALID) |
2421 | high_tpt = tbl->win[high].average_tpt; | |
2422 | ||
a5e8b505 | 2423 | scale_action = 0; |
b481de9c | 2424 | |
77626355 | 2425 | /* Too many failures, decrease rate */ |
a5e8b505 | 2426 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
e1623446 | 2427 | IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
b481de9c | 2428 | scale_action = -1; |
77626355 BC |
2429 | |
2430 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 2431 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
2432 | (high_tpt == IWL_INVALID_VALUE)) { |
2433 | ||
2434 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
2435 | scale_action = 1; | |
2436 | else if (low != IWL_RATE_INVALID) | |
8fe72311 | 2437 | scale_action = 0; |
a5e8b505 | 2438 | } |
77626355 BC |
2439 | |
2440 | /* Both adjacent throughputs are measured, but neither one has better | |
2441 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
2442 | else if ((low_tpt != IWL_INVALID_VALUE) && |
2443 | (high_tpt != IWL_INVALID_VALUE) && | |
2444 | (low_tpt < current_tpt) && | |
2445 | (high_tpt < current_tpt)) | |
2446 | scale_action = 0; | |
77626355 BC |
2447 | |
2448 | /* At least one adjacent rate's throughput is measured, | |
2449 | * and may have better performance. */ | |
b481de9c | 2450 | else { |
77626355 | 2451 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 2452 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 2453 | /* Higher rate has better throughput */ |
a5e8b505 GC |
2454 | if (high_tpt > current_tpt && |
2455 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 2456 | scale_action = 1; |
a5e8b505 | 2457 | } else { |
8fe72311 | 2458 | scale_action = 0; |
b481de9c | 2459 | } |
77626355 BC |
2460 | |
2461 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 2462 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 2463 | /* Lower rate has better throughput */ |
b481de9c | 2464 | if (low_tpt > current_tpt) { |
e1623446 TW |
2465 | IWL_DEBUG_RATE(priv, |
2466 | "decrease rate because of low tpt\n"); | |
b481de9c | 2467 | scale_action = -1; |
a5e8b505 | 2468 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 2469 | scale_action = 1; |
a5e8b505 | 2470 | } |
b481de9c ZY |
2471 | } |
2472 | } | |
2473 | ||
77626355 BC |
2474 | /* Sanity check; asked for decrease, but success rate or throughput |
2475 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
2476 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
2477 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 2478 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c | 2479 | scale_action = 0; |
46f9381a WYG |
2480 | if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type)) |
2481 | scale_action = -1; | |
3ad3b92a | 2482 | if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI && |
46f9381a WYG |
2483 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) |
2484 | scale_action = -1; | |
290f599c | 2485 | |
da5dbb97 WYG |
2486 | if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) && |
2487 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) { | |
2488 | if (lq_sta->last_bt_traffic > priv->bt_traffic_load) { | |
2489 | /* | |
2490 | * don't set scale_action, don't want to scale up if | |
2491 | * the rate scale doesn't otherwise think that is a | |
2492 | * good idea. | |
2493 | */ | |
2494 | } else if (lq_sta->last_bt_traffic <= priv->bt_traffic_load) { | |
2495 | scale_action = -1; | |
2496 | } | |
2497 | } | |
2498 | lq_sta->last_bt_traffic = priv->bt_traffic_load; | |
2499 | ||
2500 | if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) && | |
2501 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) { | |
2502 | /* search for a new modulation */ | |
2503 | rs_stay_in_table(lq_sta, true); | |
2504 | goto lq_update; | |
290f599c JB |
2505 | } |
2506 | ||
b481de9c ZY |
2507 | switch (scale_action) { |
2508 | case -1: | |
77626355 | 2509 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
2510 | if (low != IWL_RATE_INVALID) { |
2511 | update_lq = 1; | |
2512 | index = low; | |
2513 | } | |
447fee70 | 2514 | |
b481de9c ZY |
2515 | break; |
2516 | case 1: | |
77626355 | 2517 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
2518 | if (high != IWL_RATE_INVALID) { |
2519 | update_lq = 1; | |
2520 | index = high; | |
2521 | } | |
2522 | ||
2523 | break; | |
2524 | case 0: | |
77626355 | 2525 | /* No change */ |
b481de9c ZY |
2526 | default: |
2527 | break; | |
2528 | } | |
2529 | ||
e1623446 | 2530 | IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
b481de9c ZY |
2531 | "high %d type %d\n", |
2532 | index, scale_action, low, high, tbl->lq_type); | |
2533 | ||
a5e8b505 | 2534 | lq_update: |
77626355 | 2535 | /* Replace uCode's rate table for the destination station. */ |
e3139fe7 | 2536 | if (update_lq) |
70817b5e | 2537 | rs_update_rate_tbl(priv, ctx, lq_sta, tbl, index, is_green); |
77626355 | 2538 | |
3ad3b92a | 2539 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) { |
46f9381a WYG |
2540 | /* Should we stay with this modulation mode, |
2541 | * or search for a new one? */ | |
da5dbb97 | 2542 | rs_stay_in_table(lq_sta, false); |
46f9381a | 2543 | } |
77626355 BC |
2544 | /* |
2545 | * Search for new modulation mode if we're: | |
2546 | * 1) Not changing rates right now | |
2547 | * 2) Not just finishing up a search | |
2548 | * 3) Allowing a new search | |
2549 | */ | |
47cfd463 | 2550 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 2551 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 2552 | lq_sta->last_tpt = current_tpt; |
b481de9c | 2553 | |
77626355 BC |
2554 | /* Select a new "search" modulation mode to try. |
2555 | * If one is found, set up the new "search" table. */ | |
b481de9c | 2556 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 2557 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2558 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 2559 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
584a0f00 WYG |
2560 | else if (is_mimo2(tbl->lq_type)) |
2561 | rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); | |
b481de9c | 2562 | else |
584a0f00 | 2563 | rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2564 | |
77626355 | 2565 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2566 | if (lq_sta->search_better_tbl) { |
77626355 | 2567 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2568 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2569 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2570 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2571 | ||
77626355 | 2572 | /* Use new "search" start rate */ |
e7d326ac | 2573 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2574 | |
e1623446 | 2575 | IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
39e88504 | 2576 | tbl->current_rate, index); |
07bc28ed | 2577 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
7e6a5886 | 2578 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
447fee70 MA |
2579 | } else |
2580 | done_search = 1; | |
2581 | } | |
b481de9c | 2582 | |
447fee70 | 2583 | if (done_search && !lq_sta->stay_in_tbl) { |
77626355 BC |
2584 | /* If the "active" (non-search) mode was legacy, |
2585 | * and we've tried switching antennas, | |
2586 | * but we haven't been able to try HT modes (not available), | |
2587 | * stay with best antenna legacy modulation for a while | |
2588 | * before next round of mode comparisons. */ | |
c33104f0 | 2589 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
de27e64e | 2590 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && |
d6e93399 | 2591 | lq_sta->action_counter > tbl1->max_search) { |
e1623446 | 2592 | IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
bf403db8 | 2593 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2594 | } |
2595 | ||
77626355 BC |
2596 | /* If we're in an HT mode, and all 3 mode switch actions |
2597 | * have been tried and compared, stay in this best modulation | |
2598 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 | 2599 | if (lq_sta->enable_counter && |
46f9381a WYG |
2600 | (lq_sta->action_counter >= tbl1->max_search) && |
2601 | iwl_ht_enabled(priv)) { | |
0c11b4de RR |
2602 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2603 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
5f85a789 EG |
2604 | (tid != IWL_MAX_TID_COUNT)) { |
2605 | u8 sta_id = lq_sta->lq.sta_id; | |
04cf6824 | 2606 | tid_data = &priv->tid_data[sta_id][tid]; |
86b4766b WYG |
2607 | if (tid_data->agg.state == IWL_AGG_OFF) { |
2608 | IWL_DEBUG_RATE(priv, | |
2609 | "try to aggregate tid %d\n", | |
2610 | tid); | |
2611 | rs_tl_turn_on_agg(priv, tid, | |
2612 | lq_sta, sta); | |
2613 | } | |
b481de9c | 2614 | } |
bf403db8 | 2615 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2616 | } |
b481de9c ZY |
2617 | } |
2618 | ||
2619 | out: | |
978785a3 | 2620 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
c3322b30 | 2621 | lq_sta->last_txrate_idx = index; |
b481de9c ZY |
2622 | } |
2623 | ||
fe6b23dd RC |
2624 | /** |
2625 | * rs_initialize_lq - Initialize a station's hardware rate table | |
2626 | * | |
2627 | * The uCode's station table contains a table of fallback rates | |
2628 | * for automatic fallback during transmission. | |
2629 | * | |
2630 | * NOTE: This sets up a default set of values. These will be replaced later | |
2631 | * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of | |
2632 | * rc80211_simple. | |
2633 | * | |
2634 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2635 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2636 | * which requires station table entry to exist). | |
2637 | */ | |
c79dd5b5 | 2638 | static void rs_initialize_lq(struct iwl_priv *priv, |
4b7679a5 JB |
2639 | struct ieee80211_sta *sta, |
2640 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2641 | { |
e227ceac | 2642 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2643 | int rate_idx; |
aade00ce | 2644 | int i; |
39e88504 | 2645 | u32 rate; |
7e6a5886 | 2646 | u8 use_green = rs_use_green(sta); |
aade00ce GC |
2647 | u8 active_tbl = 0; |
2648 | u8 valid_tx_ant; | |
7e6a5886 JB |
2649 | struct iwl_station_priv *sta_priv; |
2650 | struct iwl_rxon_context *ctx; | |
b481de9c | 2651 | |
4b7679a5 | 2652 | if (!sta || !lq_sta) |
7e6a5886 JB |
2653 | return; |
2654 | ||
2655 | sta_priv = (void *)sta->drv_priv; | |
c6892906 | 2656 | ctx = sta_priv->ctx; |
b481de9c | 2657 | |
b7e35008 | 2658 | i = lq_sta->last_txrate_idx; |
b481de9c | 2659 | |
b7998c8b | 2660 | valid_tx_ant = priv->nvm_data->valid_tx_ant; |
aade00ce | 2661 | |
c33104f0 TW |
2662 | if (!lq_sta->search_better_tbl) |
2663 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2664 | else |
c33104f0 | 2665 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2666 | |
c33104f0 | 2667 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2668 | |
2669 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2670 | i = 0; | |
2671 | ||
1826dcc0 | 2672 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2673 | tbl->ant_type = first_antenna(valid_tx_ant); |
2674 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2675 | |
2676 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2677 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2678 | |
39e88504 | 2679 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2680 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2681 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2682 | |
978785a3 | 2683 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2684 | tbl->current_rate = rate; |
eecd6e57 | 2685 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2686 | rs_fill_link_cmd(NULL, lq_sta, rate); |
fe6b23dd | 2687 | priv->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
a1022927 | 2688 | iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, 0, true); |
b481de9c ZY |
2689 | } |
2690 | ||
e6a9854b JB |
2691 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2692 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2693 | { |
2694 | ||
e6a9854b JB |
2695 | struct sk_buff *skb = txrc->skb; |
2696 | struct ieee80211_supported_band *sband = txrc->sband; | |
d0f76d68 EG |
2697 | struct iwl_op_mode *op_mode __maybe_unused = |
2698 | (struct iwl_op_mode *)priv_r; | |
2699 | struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode); | |
e6a9854b | 2700 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2701 | struct iwl_lq_sta *lq_sta = priv_sta; |
2702 | int rate_idx; | |
b481de9c | 2703 | |
e1623446 | 2704 | IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2705 | |
c6ec7a9b AM |
2706 | /* Get max rate if user set max rate */ |
2707 | if (lq_sta) { | |
ce1d834f | 2708 | lq_sta->max_rate_idx = fls(txrc->rate_idx_mask) - 1; |
57fbcce3 | 2709 | if ((sband->band == NL80211_BAND_5GHZ) && |
c6ec7a9b AM |
2710 | (lq_sta->max_rate_idx != -1)) |
2711 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2712 | if ((lq_sta->max_rate_idx < 0) || | |
2713 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2714 | lq_sta->max_rate_idx = -1; | |
2715 | } | |
2716 | ||
fe6b23dd RC |
2717 | /* Treat uninitialized rate scaling data same as non-existing. */ |
2718 | if (lq_sta && !lq_sta->drv) { | |
2719 | IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); | |
2720 | priv_sta = NULL; | |
2721 | } | |
2722 | ||
417f114b | 2723 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2724 | |
a9c146b3 | 2725 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { |
417f114b | 2726 | rate_idx -= IWL_FIRST_OFDM_RATE; |
a9c146b3 WYG |
2727 | /* 6M and 9M shared same MCS index */ |
2728 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; | |
2729 | if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2730 | IWL_RATE_MIMO3_6M_PLCP) | |
2731 | rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM); | |
2732 | else if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2733 | IWL_RATE_MIMO2_6M_PLCP) | |
2734 | rate_idx = rate_idx + MCS_INDEX_PER_STREAM; | |
2735 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; | |
2736 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2737 | info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI; | |
2738 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) | |
2739 | info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA; | |
7aafef1c | 2740 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
a9c146b3 WYG |
2741 | info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2742 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) | |
2743 | info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
2744 | } else { | |
5027309b DH |
2745 | /* Check for invalid rates */ |
2746 | if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) || | |
57fbcce3 | 2747 | ((sband->band == NL80211_BAND_5GHZ) && |
5027309b | 2748 | (rate_idx < IWL_FIRST_OFDM_RATE))) |
a9c146b3 | 2749 | rate_idx = rate_lowest_index(sband, sta); |
5027309b | 2750 | /* On valid 5 GHz rate, adjust index */ |
57fbcce3 | 2751 | else if (sband->band == NL80211_BAND_5GHZ) |
a9c146b3 | 2752 | rate_idx -= IWL_FIRST_OFDM_RATE; |
7ebaeff8 | 2753 | info->control.rates[0].flags = 0; |
a9c146b3 | 2754 | } |
417f114b | 2755 | info->control.rates[0].idx = rate_idx; |
622ebe99 | 2756 | info->control.rates[0].count = 1; |
b481de9c ZY |
2757 | } |
2758 | ||
4b7679a5 JB |
2759 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2760 | gfp_t gfp) | |
b481de9c | 2761 | { |
8d9698b3 | 2762 | struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv; |
d0f76d68 EG |
2763 | struct iwl_op_mode *op_mode __maybe_unused = |
2764 | (struct iwl_op_mode *)priv_rate; | |
2765 | struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode); | |
b481de9c | 2766 | |
e1623446 | 2767 | IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
b481de9c | 2768 | |
08960dea | 2769 | return &sta_priv->lq_sta; |
b481de9c ZY |
2770 | } |
2771 | ||
fe6b23dd RC |
2772 | /* |
2773 | * Called after adding a new station to initialize rate scaling | |
2774 | */ | |
2775 | void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_id) | |
b481de9c ZY |
2776 | { |
2777 | int i, j; | |
fe6b23dd | 2778 | struct ieee80211_hw *hw = priv->hw; |
4b7679a5 | 2779 | struct ieee80211_conf *conf = &priv->hw->conf; |
7869b0ea | 2780 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
fe6b23dd RC |
2781 | struct iwl_station_priv *sta_priv; |
2782 | struct iwl_lq_sta *lq_sta; | |
2783 | struct ieee80211_supported_band *sband; | |
3ac40eda | 2784 | unsigned long supp; /* must be unsigned long for for_each_set_bit */ |
fe6b23dd RC |
2785 | |
2786 | sta_priv = (struct iwl_station_priv *) sta->drv_priv; | |
2787 | lq_sta = &sta_priv->lq_sta; | |
675a0b04 | 2788 | sband = hw->wiphy->bands[conf->chandef.chan->band]; |
b481de9c | 2789 | |
fe6b23dd RC |
2790 | |
2791 | lq_sta->lq.sta_id = sta_id; | |
5ad13f8c RC |
2792 | |
2793 | for (j = 0; j < LQ_SIZE; j++) | |
2794 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
2795 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); | |
2796 | ||
c33104f0 | 2797 | lq_sta->flush_timer = 0; |
4b7679a5 | 2798 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c | 2799 | |
fe6b23dd RC |
2800 | IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init for station %d ***\n", |
2801 | sta_id); | |
b481de9c ZY |
2802 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2803 | * the lowest or the highest rate.. Could consider using RSSI from | |
2804 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2805 | * after assoc.. */ | |
2806 | ||
c33104f0 | 2807 | lq_sta->is_dup = 0; |
c6ec7a9b | 2808 | lq_sta->max_rate_idx = -1; |
7d049e5a | 2809 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; |
7e6a5886 | 2810 | lq_sta->is_green = rs_use_green(sta); |
3ac40eda JB |
2811 | lq_sta->band = sband->band; |
2812 | /* | |
2813 | * active legacy rates as per supported rates bitmap | |
2814 | */ | |
2815 | supp = sta->supp_rates[sband->band]; | |
2816 | lq_sta->active_legacy_rate = 0; | |
2817 | for_each_set_bit(i, &supp, BITS_PER_LONG) | |
2818 | lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value); | |
2819 | ||
77626355 BC |
2820 | /* |
2821 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2822 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2823 | */ | |
7869b0ea DH |
2824 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; |
2825 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2826 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2827 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2828 | |
77626355 | 2829 | /* Same here */ |
7869b0ea DH |
2830 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; |
2831 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2832 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2833 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2834 | ||
7869b0ea DH |
2835 | lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1; |
2836 | lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2837 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2838 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2839 | ||
e1623446 | 2840 | IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2841 | lq_sta->active_siso_rate, |
fde0db31 GC |
2842 | lq_sta->active_mimo2_rate, |
2843 | lq_sta->active_mimo3_rate); | |
2844 | ||
a96a27f9 | 2845 | /* These values will be overridden later */ |
3a23d695 | 2846 | lq_sta->lq.general_params.single_stream_ant_msk = |
b7998c8b | 2847 | first_antenna(priv->nvm_data->valid_tx_ant); |
3a23d695 | 2848 | lq_sta->lq.general_params.dual_stream_ant_msk = |
b7998c8b EL |
2849 | priv->nvm_data->valid_tx_ant & |
2850 | ~first_antenna(priv->nvm_data->valid_tx_ant); | |
3a23d695 WYG |
2851 | if (!lq_sta->lq.general_params.dual_stream_ant_msk) { |
2852 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
b7998c8b | 2853 | } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) { |
3a23d695 | 2854 | lq_sta->lq.general_params.dual_stream_ant_msk = |
b7998c8b | 2855 | priv->nvm_data->valid_tx_ant; |
3a23d695 | 2856 | } |
07bc28ed | 2857 | |
0c11b4de RR |
2858 | /* as default allow aggregation for all tids */ |
2859 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2860 | lq_sta->drv = priv; |
b481de9c | 2861 | |
5027309b DH |
2862 | /* Set last_txrate_idx to lowest rate */ |
2863 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
57fbcce3 | 2864 | if (sband->band == NL80211_BAND_5GHZ) |
5027309b | 2865 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; |
e3949d62 | 2866 | lq_sta->is_agg = 0; |
7d5f01ad | 2867 | #ifdef CONFIG_MAC80211_DEBUGFS |
a1da077b | 2868 | lq_sta->dbg_fixed_rate = 0; |
7d5f01ad | 2869 | #endif |
a1da077b | 2870 | |
9b6ca448 | 2871 | rs_initialize_lq(priv, sta, lq_sta); |
b481de9c ZY |
2872 | } |
2873 | ||
46f9381a | 2874 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 2875 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2876 | { |
e227ceac | 2877 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2878 | int index = 0; |
b481de9c | 2879 | int rate_idx; |
1b696de2 | 2880 | int repeat_rate = 0; |
aade00ce | 2881 | u8 ant_toggle_cnt = 0; |
b481de9c | 2882 | u8 use_ht_possible = 1; |
aade00ce | 2883 | u8 valid_tx_ant = 0; |
7b090687 JB |
2884 | struct iwl_station_priv *sta_priv = |
2885 | container_of(lq_sta, struct iwl_station_priv, lq_sta); | |
07bc28ed | 2886 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2887 | |
77626355 | 2888 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2889 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2890 | |
39e88504 GC |
2891 | /* Interpret new_rate (rate_n_flags) */ |
2892 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, | |
b481de9c ZY |
2893 | &tbl_type, &rate_idx); |
2894 | ||
da5dbb97 WYG |
2895 | if (priv && priv->bt_full_concurrent) { |
2896 | /* 1x1 only */ | |
2897 | tbl_type.ant_type = | |
b7998c8b | 2898 | first_antenna(priv->nvm_data->valid_tx_ant); |
da5dbb97 WYG |
2899 | } |
2900 | ||
77626355 | 2901 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2902 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2903 | ant_toggle_cnt = 1; |
1b696de2 | 2904 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2905 | } else { |
374920cb DH |
2906 | repeat_rate = min(IWL_HT_NUMBER_TRY, |
2907 | LINK_QUAL_AGG_DISABLE_START_DEF - 1); | |
aade00ce | 2908 | } |
b481de9c ZY |
2909 | |
2910 | lq_cmd->general_params.mimo_delimiter = | |
2911 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2912 | |
2913 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2914 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2915 | |
07bc28ed GC |
2916 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2917 | lq_cmd->general_params.single_stream_ant_msk = | |
2918 | tbl_type.ant_type; | |
2919 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2920 | lq_cmd->general_params.dual_stream_ant_msk = | |
2921 | tbl_type.ant_type; | |
2922 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2923 | |
2924 | index++; | |
1b696de2 | 2925 | repeat_rate--; |
bee008b7 WYG |
2926 | if (priv) { |
2927 | if (priv->bt_full_concurrent) | |
2928 | valid_tx_ant = ANT_A; | |
2929 | else | |
b7998c8b | 2930 | valid_tx_ant = priv->nvm_data->valid_tx_ant; |
bee008b7 | 2931 | } |
aade00ce | 2932 | |
77626355 | 2933 | /* Fill rest of rate table */ |
b481de9c | 2934 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2935 | /* Repeat initial/next rate. |
2936 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2937 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2938 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2939 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2940 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2941 | ant_toggle_cnt++; | |
2942 | else if (priv && | |
2943 | rs_toggle_antenna(valid_tx_ant, | |
2944 | &new_rate, &tbl_type)) | |
2945 | ant_toggle_cnt = 1; | |
da5dbb97 | 2946 | } |
98d7e09a | 2947 | |
77626355 | 2948 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2949 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2950 | |
2951 | /* Fill next table entry */ | |
b481de9c | 2952 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2953 | cpu_to_le32(new_rate); |
1b696de2 | 2954 | repeat_rate--; |
b481de9c ZY |
2955 | index++; |
2956 | } | |
2957 | ||
39e88504 | 2958 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2959 | &rate_idx); |
2960 | ||
da5dbb97 WYG |
2961 | if (priv && priv->bt_full_concurrent) { |
2962 | /* 1x1 only */ | |
2963 | tbl_type.ant_type = | |
b7998c8b | 2964 | first_antenna(priv->nvm_data->valid_tx_ant); |
da5dbb97 WYG |
2965 | } |
2966 | ||
77626355 BC |
2967 | /* Indicate to uCode which entries might be MIMO. |
2968 | * If initial rate was MIMO, this will finally end up | |
2969 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2970 | if (is_mimo(tbl_type.lq_type)) |
2971 | lq_cmd->general_params.mimo_delimiter = index; | |
2972 | ||
77626355 | 2973 | /* Get next rate */ |
39e88504 GC |
2974 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2975 | use_ht_possible); | |
b481de9c | 2976 | |
77626355 | 2977 | /* How many times should we repeat the next rate? */ |
b481de9c | 2978 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2979 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2980 | ant_toggle_cnt++; | |
2981 | else if (priv && | |
2982 | rs_toggle_antenna(valid_tx_ant, | |
2983 | &new_rate, &tbl_type)) | |
2984 | ant_toggle_cnt = 1; | |
2985 | ||
1b696de2 | 2986 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2987 | } else { |
1b696de2 | 2988 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2989 | } |
b481de9c | 2990 | |
77626355 BC |
2991 | /* Don't allow HT rates after next pass. |
2992 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2993 | use_ht_possible = 0; |
2994 | ||
77626355 | 2995 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2996 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2997 | |
2998 | /* Fill next table entry */ | |
39e88504 | 2999 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
3000 | |
3001 | index++; | |
1b696de2 | 3002 | repeat_rate--; |
b481de9c ZY |
3003 | } |
3004 | ||
7b090687 JB |
3005 | lq_cmd->agg_params.agg_frame_cnt_limit = |
3006 | sta_priv->max_agg_bufsize ?: LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
13c33a09 | 3007 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; |
7469701e | 3008 | |
13c33a09 WYG |
3009 | lq_cmd->agg_params.agg_time_limit = |
3010 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
7469701e WYG |
3011 | /* |
3012 | * overwrite if needed, pass aggregation time limit | |
3013 | * to uCode in uSec | |
3014 | */ | |
0d8877a1 JB |
3015 | if (priv && priv->lib->bt_params && |
3016 | priv->lib->bt_params->agg_time_limit && | |
66e863a5 | 3017 | priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) |
7469701e | 3018 | lq_cmd->agg_params.agg_time_limit = |
0d8877a1 | 3019 | cpu_to_le16(priv->lib->bt_params->agg_time_limit); |
b481de9c ZY |
3020 | } |
3021 | ||
6cb5f3ea | 3022 | static void *rs_alloc(struct ieee80211_hw *hw) |
b481de9c | 3023 | { |
4b7679a5 | 3024 | return hw->priv; |
b481de9c ZY |
3025 | } |
3026 | /* rate scale requires free function to be implemented */ | |
3027 | static void rs_free(void *priv_rate) | |
3028 | { | |
3029 | return; | |
3030 | } | |
3031 | ||
4b7679a5 JB |
3032 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
3033 | void *priv_sta) | |
b481de9c | 3034 | { |
d0f76d68 EG |
3035 | struct iwl_op_mode *op_mode __maybe_unused = priv_r; |
3036 | struct iwl_priv *priv __maybe_unused = IWL_OP_MODE_GET_DVM(op_mode); | |
b481de9c | 3037 | |
e1623446 | 3038 | IWL_DEBUG_RATE(priv, "enter\n"); |
e1623446 | 3039 | IWL_DEBUG_RATE(priv, "leave\n"); |
b481de9c ZY |
3040 | } |
3041 | ||
93dc646a | 3042 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
3043 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
3044 | u32 *rate_n_flags, int index) | |
98d7e09a | 3045 | { |
bf403db8 | 3046 | struct iwl_priv *priv; |
3c4955f8 WYG |
3047 | u8 valid_tx_ant; |
3048 | u8 ant_sel_tx; | |
bf403db8 EK |
3049 | |
3050 | priv = lq_sta->drv; | |
b7998c8b | 3051 | valid_tx_ant = priv->nvm_data->valid_tx_ant; |
39e88504 | 3052 | if (lq_sta->dbg_fixed_rate) { |
3c4955f8 WYG |
3053 | ant_sel_tx = |
3054 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
3055 | >> RATE_MCS_ANT_POS); | |
3056 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
39e88504 | 3057 | *rate_n_flags = lq_sta->dbg_fixed_rate; |
3c4955f8 | 3058 | IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
39e88504 | 3059 | } else { |
3c4955f8 WYG |
3060 | lq_sta->dbg_fixed_rate = 0; |
3061 | IWL_ERR(priv, | |
3062 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
3063 | ant_sel_tx, valid_tx_ant); | |
3064 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); | |
39e88504 | 3065 | } |
39e88504 | 3066 | } else { |
e1623446 | 3067 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
98d7e09a | 3068 | } |
98d7e09a | 3069 | } |
5ae212c9 | 3070 | |
98d7e09a ZY |
3071 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
3072 | const char __user *user_buf, size_t count, loff_t *ppos) | |
3073 | { | |
e227ceac | 3074 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 3075 | struct iwl_priv *priv; |
98d7e09a | 3076 | char buf[64]; |
805d7d23 | 3077 | size_t buf_size; |
98d7e09a | 3078 | u32 parsed_rate; |
6489854b | 3079 | |
98d7e09a | 3080 | |
bf403db8 | 3081 | priv = lq_sta->drv; |
98d7e09a ZY |
3082 | memset(buf, 0, sizeof(buf)); |
3083 | buf_size = min(count, sizeof(buf) - 1); | |
3084 | if (copy_from_user(buf, user_buf, buf_size)) | |
3085 | return -EFAULT; | |
3086 | ||
3087 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
4e308119 | 3088 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 3089 | else |
4e308119 | 3090 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 3091 | |
6489854b | 3092 | rs_program_fix_rate(priv, lq_sta); |
98d7e09a ZY |
3093 | |
3094 | return count; | |
3095 | } | |
0209dc11 | 3096 | |
5ae212c9 ZY |
3097 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
3098 | char __user *user_buf, size_t count, loff_t *ppos) | |
3099 | { | |
a412c804 | 3100 | char *buff; |
5ae212c9 ZY |
3101 | int desc = 0; |
3102 | int i = 0; | |
12b96817 | 3103 | int index = 0; |
a412c804 | 3104 | ssize_t ret; |
5ae212c9 | 3105 | |
e227ceac | 3106 | struct iwl_lq_sta *lq_sta = file->private_data; |
d8ae4f52 | 3107 | struct iwl_priv *priv; |
adb7b5e6 | 3108 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
5ae212c9 | 3109 | |
d8ae4f52 | 3110 | priv = lq_sta->drv; |
a412c804 FS |
3111 | buff = kmalloc(1024, GFP_KERNEL); |
3112 | if (!buff) | |
3113 | return -ENOMEM; | |
3114 | ||
c33104f0 | 3115 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 3116 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 3117 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 3118 | lq_sta->active_legacy_rate); |
98d7e09a | 3119 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
4e308119 | 3120 | lq_sta->dbg_fixed_rate); |
d8ae4f52 | 3121 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
b7998c8b EL |
3122 | (priv->nvm_data->valid_tx_ant & ANT_A) ? "ANT_A," : "", |
3123 | (priv->nvm_data->valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
3124 | (priv->nvm_data->valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
adb7b5e6 WYG |
3125 | desc += sprintf(buff+desc, "lq type %s\n", |
3126 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
3127 | if (is_Ht(tbl->lq_type)) { | |
e70fe7eb | 3128 | desc += sprintf(buff + desc, " %s", |
adb7b5e6 WYG |
3129 | (is_siso(tbl->lq_type)) ? "SISO" : |
3130 | ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); | |
e70fe7eb | 3131 | desc += sprintf(buff + desc, " %s", |
7aafef1c | 3132 | (tbl->is_ht40) ? "40MHz" : "20MHz"); |
e70fe7eb EG |
3133 | desc += sprintf(buff + desc, " %s %s %s\n", |
3134 | (tbl->is_SGI) ? "SGI" : "", | |
e3949d62 DH |
3135 | (lq_sta->is_green) ? "GF enabled" : "", |
3136 | (lq_sta->is_agg) ? "AGG on" : ""); | |
adb7b5e6 | 3137 | } |
12b96817 WYG |
3138 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", |
3139 | lq_sta->last_rate_n_flags); | |
5ae212c9 ZY |
3140 | desc += sprintf(buff+desc, "general:" |
3141 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
3142 | lq_sta->lq.general_params.flags, |
3143 | lq_sta->lq.general_params.mimo_delimiter, | |
3144 | lq_sta->lq.general_params.single_stream_ant_msk, | |
3145 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
3146 | |
3147 | desc += sprintf(buff+desc, "agg:" | |
3148 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
3149 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
3150 | lq_sta->lq.agg_params.agg_dis_start_th, | |
3151 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
3152 | |
3153 | desc += sprintf(buff+desc, | |
3154 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
3155 | lq_sta->lq.general_params.start_rate_index[0], |
3156 | lq_sta->lq.general_params.start_rate_index[1], | |
3157 | lq_sta->lq.general_params.start_rate_index[2], | |
3158 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 | 3159 | |
12b96817 WYG |
3160 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
3161 | index = iwl_hwrate_to_plcp_idx( | |
3162 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); | |
3163 | if (is_legacy(tbl->lq_type)) { | |
3164 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
3165 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
3166 | iwl_rate_mcs[index].mbps); | |
3167 | } else { | |
3168 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", | |
3169 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
3170 | iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); | |
3171 | } | |
3172 | } | |
5ae212c9 | 3173 | |
a412c804 FS |
3174 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
3175 | kfree(buff); | |
3176 | return ret; | |
5ae212c9 ZY |
3177 | } |
3178 | ||
3179 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 3180 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 | 3181 | .read = rs_sta_dbgfs_scale_table_read, |
234e3405 | 3182 | .open = simple_open, |
6038f373 | 3183 | .llseek = default_llseek, |
5ae212c9 | 3184 | }; |
0209dc11 ZY |
3185 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
3186 | char __user *user_buf, size_t count, loff_t *ppos) | |
3187 | { | |
a412c804 | 3188 | char *buff; |
0209dc11 ZY |
3189 | int desc = 0; |
3190 | int i, j; | |
a412c804 | 3191 | ssize_t ret; |
0209dc11 | 3192 | |
e227ceac | 3193 | struct iwl_lq_sta *lq_sta = file->private_data; |
a412c804 FS |
3194 | |
3195 | buff = kmalloc(1024, GFP_KERNEL); | |
3196 | if (!buff) | |
3197 | return -ENOMEM; | |
3198 | ||
0209dc11 | 3199 | for (i = 0; i < LQ_SIZE; i++) { |
7aafef1c WYG |
3200 | desc += sprintf(buff+desc, |
3201 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
0209dc11 | 3202 | "rate=0x%X\n", |
c3056065 | 3203 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
3204 | lq_sta->lq_info[i].lq_type, |
3205 | lq_sta->lq_info[i].is_SGI, | |
7aafef1c | 3206 | lq_sta->lq_info[i].is_ht40, |
c33104f0 | 3207 | lq_sta->lq_info[i].is_dup, |
2681b20b | 3208 | lq_sta->is_green, |
39e88504 | 3209 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
3210 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
3211 | desc += sprintf(buff+desc, | |
c33104f0 TW |
3212 | "counter=%d success=%d %%=%d\n", |
3213 | lq_sta->lq_info[i].win[j].counter, | |
3214 | lq_sta->lq_info[i].win[j].success_counter, | |
3215 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
3216 | } |
3217 | } | |
a412c804 FS |
3218 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
3219 | kfree(buff); | |
3220 | return ret; | |
0209dc11 ZY |
3221 | } |
3222 | ||
3223 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
3224 | .read = rs_sta_dbgfs_stats_table_read, | |
234e3405 | 3225 | .open = simple_open, |
6038f373 | 3226 | .llseek = default_llseek, |
0209dc11 | 3227 | }; |
5ae212c9 | 3228 | |
38167459 WYG |
3229 | static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
3230 | char __user *user_buf, size_t count, loff_t *ppos) | |
3231 | { | |
38167459 | 3232 | struct iwl_lq_sta *lq_sta = file->private_data; |
38167459 | 3233 | struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; |
70817b5e JB |
3234 | char buff[120]; |
3235 | int desc = 0; | |
38167459 WYG |
3236 | |
3237 | if (is_Ht(tbl->lq_type)) | |
3238 | desc += sprintf(buff+desc, | |
3239 | "Bit Rate= %d Mb/s\n", | |
3240 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
3241 | else | |
3242 | desc += sprintf(buff+desc, | |
3243 | "Bit Rate= %d Mb/s\n", | |
3244 | iwl_rates[lq_sta->last_txrate_idx].ieee >> 1); | |
38167459 | 3245 | |
08960dea | 3246 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
38167459 WYG |
3247 | } |
3248 | ||
3249 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
3250 | .read = rs_sta_dbgfs_rate_scale_data_read, | |
234e3405 | 3251 | .open = simple_open, |
6038f373 | 3252 | .llseek = default_llseek, |
38167459 WYG |
3253 | }; |
3254 | ||
93dc646a ZY |
3255 | static void rs_add_debugfs(void *priv, void *priv_sta, |
3256 | struct dentry *dir) | |
3257 | { | |
e227ceac | 3258 | struct iwl_lq_sta *lq_sta = priv_sta; |
0c11b4de | 3259 | |
49175fe6 GKH |
3260 | debugfs_create_file("rate_scale_table", 0600, dir, lq_sta, |
3261 | &rs_sta_dbgfs_scale_table_ops); | |
3262 | debugfs_create_file("rate_stats_table", 0400, dir, lq_sta, | |
3263 | &rs_sta_dbgfs_stats_table_ops); | |
3264 | debugfs_create_file("rate_scale_data", 0400, dir, lq_sta, | |
3265 | &rs_sta_dbgfs_rate_scale_data_ops); | |
3266 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
3267 | &lq_sta->tx_agg_tid_en); | |
93dc646a | 3268 | |
93dc646a ZY |
3269 | } |
3270 | #endif | |
3271 | ||
fe6b23dd RC |
3272 | /* |
3273 | * Initialization of rate scaling information is done by driver after | |
3274 | * the station is added. Since mac80211 calls this function before a | |
3275 | * station is added we ignore it. | |
3276 | */ | |
3277 | static void rs_rate_init_stub(void *priv_r, struct ieee80211_supported_band *sband, | |
3de805cf SW |
3278 | struct cfg80211_chan_def *chandef, |
3279 | struct ieee80211_sta *sta, void *priv_sta) | |
fe6b23dd RC |
3280 | { |
3281 | } | |
631ad703 JB |
3282 | |
3283 | static const struct rate_control_ops rs_ops = { | |
b481de9c ZY |
3284 | .name = RS_NAME, |
3285 | .tx_status = rs_tx_status, | |
3286 | .get_rate = rs_get_rate, | |
fe6b23dd | 3287 | .rate_init = rs_rate_init_stub, |
b481de9c ZY |
3288 | .alloc = rs_alloc, |
3289 | .free = rs_free, | |
3290 | .alloc_sta = rs_alloc_sta, | |
3291 | .free_sta = rs_free_sta, | |
93dc646a ZY |
3292 | #ifdef CONFIG_MAC80211_DEBUGFS |
3293 | .add_sta_debugfs = rs_add_debugfs, | |
93dc646a | 3294 | #endif |
b481de9c ZY |
3295 | }; |
3296 | ||
e227ceac | 3297 | int iwlagn_rate_control_register(void) |
b481de9c | 3298 | { |
897e1cf2 | 3299 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
3300 | } |
3301 | ||
e227ceac | 3302 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
3303 | { |
3304 | ieee80211_rate_control_unregister(&rs_ops); | |
3305 | } | |
3306 |