1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 *****************************************************************************/
26
27 #ifndef __iwl_legacy_rs_h__
28 #define __iwl_legacy_rs_h__
29
30 struct iwl_rate_info {
31 u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */
32 u8 plcp_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */
33 u8 plcp_mimo2; /* uCode API: IWL_RATE_MIMO2_6M_PLCP, etc. */
34 u8 ieee; /* MAC header: IWL_RATE_6M_IEEE, etc. */
35 u8 prev_ieee; /* previous rate in IEEE speeds */
36 u8 next_ieee; /* next rate in IEEE speeds */
37 u8 prev_rs; /* previous rate used in rs algo */
38 u8 next_rs; /* next rate used in rs algo */
39 u8 prev_rs_tgg; /* previous rate used in TGG rs algo */
40 u8 next_rs_tgg; /* next rate used in TGG rs algo */
41 };
42
43 struct iwl3945_rate_info {
44 u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */
45 u8 ieee; /* MAC header: IWL_RATE_6M_IEEE, etc. */
46 u8 prev_ieee; /* previous rate in IEEE speeds */
47 u8 next_ieee; /* next rate in IEEE speeds */
48 u8 prev_rs; /* previous rate used in rs algo */
49 u8 next_rs; /* next rate used in rs algo */
50 u8 prev_rs_tgg; /* previous rate used in TGG rs algo */
51 u8 next_rs_tgg; /* next rate used in TGG rs algo */
52 u8 table_rs_index; /* index in rate scale table cmd */
53 u8 prev_table_rs; /* prev in rate table cmd */
54 };
55
56
57 /*
58 * These serve as indexes into
59 * struct iwl_rate_info iwlegacy_rates[IWL_RATE_COUNT];
60 */
61 enum {
62 IWL_RATE_1M_INDEX = 0,
63 IWL_RATE_2M_INDEX,
64 IWL_RATE_5M_INDEX,
65 IWL_RATE_11M_INDEX,
66 IWL_RATE_6M_INDEX,
67 IWL_RATE_9M_INDEX,
68 IWL_RATE_12M_INDEX,
69 IWL_RATE_18M_INDEX,
70 IWL_RATE_24M_INDEX,
71 IWL_RATE_36M_INDEX,
72 IWL_RATE_48M_INDEX,
73 IWL_RATE_54M_INDEX,
74 IWL_RATE_60M_INDEX,
75 IWL_RATE_COUNT,
76 IWL_RATE_COUNT_LEGACY = IWL_RATE_COUNT - 1, /* Excluding 60M */
77 IWL_RATE_COUNT_3945 = IWL_RATE_COUNT - 1,
78 IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
79 IWL_RATE_INVALID = IWL_RATE_COUNT,
80 };
81
82 enum {
83 IWL_RATE_6M_INDEX_TABLE = 0,
84 IWL_RATE_9M_INDEX_TABLE,
85 IWL_RATE_12M_INDEX_TABLE,
86 IWL_RATE_18M_INDEX_TABLE,
87 IWL_RATE_24M_INDEX_TABLE,
88 IWL_RATE_36M_INDEX_TABLE,
89 IWL_RATE_48M_INDEX_TABLE,
90 IWL_RATE_54M_INDEX_TABLE,
91 IWL_RATE_1M_INDEX_TABLE,
92 IWL_RATE_2M_INDEX_TABLE,
93 IWL_RATE_5M_INDEX_TABLE,
94 IWL_RATE_11M_INDEX_TABLE,
95 IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
96 };
97
98 enum {
99 IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
100 IWL39_LAST_OFDM_RATE = IWL_RATE_54M_INDEX,
101 IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
102 IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
103 IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
104 };
105
106 /* #define vs. enum to keep from defaulting to 'large integer' */
107 #define IWL_RATE_6M_MASK (1 << IWL_RATE_6M_INDEX)
108 #define IWL_RATE_9M_MASK (1 << IWL_RATE_9M_INDEX)
109 #define IWL_RATE_12M_MASK (1 << IWL_RATE_12M_INDEX)
110 #define IWL_RATE_18M_MASK (1 << IWL_RATE_18M_INDEX)
111 #define IWL_RATE_24M_MASK (1 << IWL_RATE_24M_INDEX)
112 #define IWL_RATE_36M_MASK (1 << IWL_RATE_36M_INDEX)
113 #define IWL_RATE_48M_MASK (1 << IWL_RATE_48M_INDEX)
114 #define IWL_RATE_54M_MASK (1 << IWL_RATE_54M_INDEX)
115 #define IWL_RATE_60M_MASK (1 << IWL_RATE_60M_INDEX)
116 #define IWL_RATE_1M_MASK (1 << IWL_RATE_1M_INDEX)
117 #define IWL_RATE_2M_MASK (1 << IWL_RATE_2M_INDEX)
118 #define IWL_RATE_5M_MASK (1 << IWL_RATE_5M_INDEX)
119 #define IWL_RATE_11M_MASK (1 << IWL_RATE_11M_INDEX)
120
121 /* uCode API values for legacy bit rates, both OFDM and CCK */
122 enum {
123 IWL_RATE_6M_PLCP = 13,
124 IWL_RATE_9M_PLCP = 15,
125 IWL_RATE_12M_PLCP = 5,
126 IWL_RATE_18M_PLCP = 7,
127 IWL_RATE_24M_PLCP = 9,
128 IWL_RATE_36M_PLCP = 11,
129 IWL_RATE_48M_PLCP = 1,
130 IWL_RATE_54M_PLCP = 3,
131 IWL_RATE_60M_PLCP = 3,/*FIXME:RS:should be removed*/
132 IWL_RATE_1M_PLCP = 10,
133 IWL_RATE_2M_PLCP = 20,
134 IWL_RATE_5M_PLCP = 55,
135 IWL_RATE_11M_PLCP = 110,
136 /*FIXME:RS:add IWL_RATE_LEGACY_INVM_PLCP = 0,*/
137 };
138
139 /* uCode API values for OFDM high-throughput (HT) bit rates */
140 enum {
141 IWL_RATE_SISO_6M_PLCP = 0,
142 IWL_RATE_SISO_12M_PLCP = 1,
143 IWL_RATE_SISO_18M_PLCP = 2,
144 IWL_RATE_SISO_24M_PLCP = 3,
145 IWL_RATE_SISO_36M_PLCP = 4,
146 IWL_RATE_SISO_48M_PLCP = 5,
147 IWL_RATE_SISO_54M_PLCP = 6,
148 IWL_RATE_SISO_60M_PLCP = 7,
149 IWL_RATE_MIMO2_6M_PLCP = 0x8,
150 IWL_RATE_MIMO2_12M_PLCP = 0x9,
151 IWL_RATE_MIMO2_18M_PLCP = 0xa,
152 IWL_RATE_MIMO2_24M_PLCP = 0xb,
153 IWL_RATE_MIMO2_36M_PLCP = 0xc,
154 IWL_RATE_MIMO2_48M_PLCP = 0xd,
155 IWL_RATE_MIMO2_54M_PLCP = 0xe,
156 IWL_RATE_MIMO2_60M_PLCP = 0xf,
157 IWL_RATE_SISO_INVM_PLCP,
158 IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
159 };
160
161 /* MAC header values for bit rates */
162 enum {
163 IWL_RATE_6M_IEEE = 12,
164 IWL_RATE_9M_IEEE = 18,
165 IWL_RATE_12M_IEEE = 24,
166 IWL_RATE_18M_IEEE = 36,
167 IWL_RATE_24M_IEEE = 48,
168 IWL_RATE_36M_IEEE = 72,
169 IWL_RATE_48M_IEEE = 96,
170 IWL_RATE_54M_IEEE = 108,
171 IWL_RATE_60M_IEEE = 120,
172 IWL_RATE_1M_IEEE = 2,
173 IWL_RATE_2M_IEEE = 4,
174 IWL_RATE_5M_IEEE = 11,
175 IWL_RATE_11M_IEEE = 22,
176 };
177
178 #define IWL_CCK_BASIC_RATES_MASK \
179 (IWL_RATE_1M_MASK | \
180 IWL_RATE_2M_MASK)
181
182 #define IWL_CCK_RATES_MASK \
183 (IWL_CCK_BASIC_RATES_MASK | \
184 IWL_RATE_5M_MASK | \
185 IWL_RATE_11M_MASK)
186
187 #define IWL_OFDM_BASIC_RATES_MASK \
188 (IWL_RATE_6M_MASK | \
189 IWL_RATE_12M_MASK | \
190 IWL_RATE_24M_MASK)
191
192 #define IWL_OFDM_RATES_MASK \
193 (IWL_OFDM_BASIC_RATES_MASK | \
194 IWL_RATE_9M_MASK | \
195 IWL_RATE_18M_MASK | \
196 IWL_RATE_36M_MASK | \
197 IWL_RATE_48M_MASK | \
198 IWL_RATE_54M_MASK)
199
200 #define IWL_BASIC_RATES_MASK \
201 (IWL_OFDM_BASIC_RATES_MASK | \
202 IWL_CCK_BASIC_RATES_MASK)
203
204 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
205 #define IWL_RATES_MASK_3945 ((1 << IWL_RATE_COUNT_3945) - 1)
206
207 #define IWL_INVALID_VALUE -1
208
209 #define IWL_MIN_RSSI_VAL -100
210 #define IWL_MAX_RSSI_VAL 0
211
212 /* These values specify how many Tx frame attempts before
213 * searching for a new modulation mode */
214 #define IWL_LEGACY_FAILURE_LIMIT 160
215 #define IWL_LEGACY_SUCCESS_LIMIT 480
216 #define IWL_LEGACY_TABLE_COUNT 160
217
218 #define IWL_NONE_LEGACY_FAILURE_LIMIT 400
219 #define IWL_NONE_LEGACY_SUCCESS_LIMIT 4500
220 #define IWL_NONE_LEGACY_TABLE_COUNT 1500
221
222 /* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
223 #define IWL_RS_GOOD_RATIO 12800 /* 100% */
224 #define IWL_RATE_SCALE_SWITCH 10880 /* 85% */
225 #define IWL_RATE_HIGH_TH 10880 /* 85% */
226 #define IWL_RATE_INCREASE_TH 6400 /* 50% */
227 #define IWL_RATE_DECREASE_TH 1920 /* 15% */
228
229 /* possible actions when in legacy mode */
230 #define IWL_LEGACY_SWITCH_ANTENNA1 0
231 #define IWL_LEGACY_SWITCH_ANTENNA2 1
232 #define IWL_LEGACY_SWITCH_SISO 2
233 #define IWL_LEGACY_SWITCH_MIMO2_AB 3
234 #define IWL_LEGACY_SWITCH_MIMO2_AC 4
235 #define IWL_LEGACY_SWITCH_MIMO2_BC 5
236
237 /* possible actions when in siso mode */
238 #define IWL_SISO_SWITCH_ANTENNA1 0
239 #define IWL_SISO_SWITCH_ANTENNA2 1
240 #define IWL_SISO_SWITCH_MIMO2_AB 2
241 #define IWL_SISO_SWITCH_MIMO2_AC 3
242 #define IWL_SISO_SWITCH_MIMO2_BC 4
243 #define IWL_SISO_SWITCH_GI 5
244
245 /* possible actions when in mimo mode */
246 #define IWL_MIMO2_SWITCH_ANTENNA1 0
247 #define IWL_MIMO2_SWITCH_ANTENNA2 1
248 #define IWL_MIMO2_SWITCH_SISO_A 2
249 #define IWL_MIMO2_SWITCH_SISO_B 3
250 #define IWL_MIMO2_SWITCH_SISO_C 4
251 #define IWL_MIMO2_SWITCH_GI 5
252
253 #define IWL_MAX_SEARCH IWL_MIMO2_SWITCH_GI
254
255 #define IWL_ACTION_LIMIT 3 /* # possible actions */
256
257 #define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */
258
259 /* load per tid defines for A-MPDU activation */
260 #define IWL_AGG_TPT_THREHOLD 0
261 #define IWL_AGG_LOAD_THRESHOLD 10
262 #define IWL_AGG_ALL_TID 0xff
263 #define TID_QUEUE_CELL_SPACING 50 /*mS */
264 #define TID_QUEUE_MAX_SIZE 20
265 #define TID_ROUND_VALUE 5 /* mS */
266 #define TID_MAX_LOAD_COUNT 8
267
268 #define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
269 #define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))
270
271 extern const struct iwl_rate_info iwlegacy_rates[IWL_RATE_COUNT];
272
273 enum iwl_table_type {
274 LQ_NONE,
275 LQ_G, /* legacy types */
276 LQ_A,
277 LQ_SISO, /* high-throughput types */
278 LQ_MIMO2,
279 LQ_MAX,
280 };
281
282 #define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
283 #define is_siso(tbl) ((tbl) == LQ_SISO)
284 #define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
285 #define is_mimo(tbl) (is_mimo2(tbl))
286 #define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
287 #define is_a_band(tbl) ((tbl) == LQ_A)
288 #define is_g_and(tbl) ((tbl) == LQ_G)
289
290 #define ANT_NONE 0x0
291 #define ANT_A BIT(0)
292 #define ANT_B BIT(1)
293 #define ANT_AB (ANT_A | ANT_B)
294 #define ANT_C BIT(2)
295 #define ANT_AC (ANT_A | ANT_C)
296 #define ANT_BC (ANT_B | ANT_C)
297 #define ANT_ABC (ANT_AB | ANT_C)
298
299 #define IWL_MAX_MCS_DISPLAY_SIZE 12
300
301 struct iwl_rate_mcs_info {
302 char mbps[IWL_MAX_MCS_DISPLAY_SIZE];
303 char mcs[IWL_MAX_MCS_DISPLAY_SIZE];
304 };
305
306 /**
307 * struct iwl_rate_scale_data -- tx success history for one rate
308 */
309 struct iwl_rate_scale_data {
310 u64 data; /* bitmap of successful frames */
311 s32 success_counter; /* number of frames successful */
312 s32 success_ratio; /* per-cent * 128 */
313 s32 counter; /* number of frames attempted */
314 s32 average_tpt; /* success ratio * expected throughput */
315 unsigned long stamp;
316 };
317
318 /**
319 * struct iwl_scale_tbl_info -- tx params and success history for all rates
320 *
321 * There are two of these in struct iwl_lq_sta,
322 * one for "active", and one for "search".
323 */
324 struct iwl_scale_tbl_info {
325 enum iwl_table_type lq_type;
326 u8 ant_type;
327 u8 is_SGI; /* 1 = short guard interval */
328 u8 is_ht40; /* 1 = 40 MHz channel width */
329 u8 is_dup; /* 1 = duplicated data streams */
330 u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
331 u8 max_search; /* maximun number of tables we can search */
332 s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */
333 u32 current_rate; /* rate_n_flags, uCode API format */
334 struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
335 };
336
337 struct iwl_traffic_load {
338 unsigned long time_stamp; /* age of the oldest statistics */
339 u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time
340 * slice */
341 u32 total; /* total num of packets during the
342 * last TID_MAX_TIME_DIFF */
343 u8 queue_count; /* number of queues that has
344 * been used since the last cleanup */
345 u8 head; /* start of the circular buffer */
346 };
347
348 /**
349 * struct iwl_lq_sta -- driver's rate scaling private structure
350 *
351 * Pointer to this gets passed back and forth between driver and mac80211.
352 */
353 struct iwl_lq_sta {
354 u8 active_tbl; /* index of active table, range 0-1 */
355 u8 enable_counter; /* indicates HT mode */
356 u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */
357 u8 search_better_tbl; /* 1: currently trying alternate mode */
358 s32 last_tpt;
359
360 /* The following determine when to search for a new mode */
361 u32 table_count_limit;
362 u32 max_failure_limit; /* # failed frames before new search */
363 u32 max_success_limit; /* # successful frames before new search */
364 u32 table_count;
365 u32 total_failed; /* total failed frames, any/all rates */
366 u32 total_success; /* total successful frames, any/all rates */
367 u64 flush_timer; /* time staying in mode before new search */
368
369 u8 action_counter; /* # mode-switch actions tried */
370 u8 is_green;
371 u8 is_dup;
372 enum ieee80211_band band;
373
374 /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
375 u32 supp_rates;
376 u16 active_legacy_rate;
377 u16 active_siso_rate;
378 u16 active_mimo2_rate;
379 s8 max_rate_idx; /* Max rate set by user */
380 u8 missed_rate_counter;
381
382 struct iwl_link_quality_cmd lq;
383 struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
384 struct iwl_traffic_load load[TID_MAX_LOAD_COUNT];
385 u8 tx_agg_tid_en;
386 #ifdef CONFIG_MAC80211_DEBUGFS
387 struct dentry *rs_sta_dbgfs_scale_table_file;
388 struct dentry *rs_sta_dbgfs_stats_table_file;
389 struct dentry *rs_sta_dbgfs_rate_scale_data_file;
390 struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
391 u32 dbg_fixed_rate;
392 #endif
393 struct iwl_priv *drv;
394
395 /* used to be in sta_info */
396 int last_txrate_idx;
397 /* last tx rate_n_flags */
398 u32 last_rate_n_flags;
399 /* packets destined for this STA are aggregated */
400 u8 is_agg;
401 };
402
iwl4965_num_of_ant(u8 mask)403 static inline u8 iwl4965_num_of_ant(u8 mask)
404 {
405 return !!((mask) & ANT_A) +
406 !!((mask) & ANT_B) +
407 !!((mask) & ANT_C);
408 }
409
iwl4965_first_antenna(u8 mask)410 static inline u8 iwl4965_first_antenna(u8 mask)
411 {
412 if (mask & ANT_A)
413 return ANT_A;
414 if (mask & ANT_B)
415 return ANT_B;
416 return ANT_C;
417 }
418
419
420 /**
421 * iwl3945_rate_scale_init - Initialize the rate scale table based on assoc info
422 *
423 * The specific throughput table used is based on the type of network
424 * the associated with, including A, B, G, and G w/ TGG protection
425 */
426 extern void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id);
427
428 /* Initialize station's rate scaling information after adding station */
429 extern void iwl4965_rs_rate_init(struct iwl_priv *priv,
430 struct ieee80211_sta *sta, u8 sta_id);
431 extern void iwl3945_rs_rate_init(struct iwl_priv *priv,
432 struct ieee80211_sta *sta, u8 sta_id);
433
434 /**
435 * iwl_rate_control_register - Register the rate control algorithm callbacks
436 *
437 * Since the rate control algorithm is hardware specific, there is no need
438 * or reason to place it as a stand alone module. The driver can call
439 * iwl_rate_control_register in order to register the rate control callbacks
440 * with the mac80211 subsystem. This should be performed prior to calling
441 * ieee80211_register_hw
442 *
443 */
444 extern int iwl4965_rate_control_register(void);
445 extern int iwl3945_rate_control_register(void);
446
447 /**
448 * iwl_rate_control_unregister - Unregister the rate control callbacks
449 *
450 * This should be called after calling ieee80211_unregister_hw, but before
451 * the driver is unloaded.
452 */
453 extern void iwl4965_rate_control_unregister(void);
454 extern void iwl3945_rate_control_unregister(void);
455
456 #endif /* __iwl_legacy_rs__ */
457