1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /******************************************************************************
3  *
4  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
5  *****************************************************************************/
6 
7 #ifndef __iwl_agn_rs_h__
8 #define __iwl_agn_rs_h__
9 
10 #include <net/mac80211.h>
11 
12 #include "iwl-config.h"
13 
14 #include "commands.h"
15 
16 struct iwl_rate_info {
17 	u8 plcp;	/* uCode API:  IWL_RATE_6M_PLCP, etc. */
18 	u8 plcp_siso;	/* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
19 	u8 plcp_mimo2;	/* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
20 	u8 plcp_mimo3;  /* uCode API:  IWL_RATE_MIMO3_6M_PLCP, etc. */
21 	u8 ieee;	/* MAC header:  IWL_RATE_6M_IEEE, etc. */
22 	u8 prev_ieee;    /* previous rate in IEEE speeds */
23 	u8 next_ieee;    /* next rate in IEEE speeds */
24 	u8 prev_rs;      /* previous rate used in rs algo */
25 	u8 next_rs;      /* next rate used in rs algo */
26 	u8 prev_rs_tgg;  /* previous rate used in TGG rs algo */
27 	u8 next_rs_tgg;  /* next rate used in TGG rs algo */
28 };
29 
30 /*
31  * These serve as indexes into
32  * struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
33  */
34 enum {
35 	IWL_RATE_1M_INDEX = 0,
36 	IWL_RATE_2M_INDEX,
37 	IWL_RATE_5M_INDEX,
38 	IWL_RATE_11M_INDEX,
39 	IWL_RATE_6M_INDEX,
40 	IWL_RATE_9M_INDEX,
41 	IWL_RATE_12M_INDEX,
42 	IWL_RATE_18M_INDEX,
43 	IWL_RATE_24M_INDEX,
44 	IWL_RATE_36M_INDEX,
45 	IWL_RATE_48M_INDEX,
46 	IWL_RATE_54M_INDEX,
47 	IWL_RATE_60M_INDEX,
48 	IWL_RATE_COUNT, /*FIXME:RS:change to IWL_RATE_INDEX_COUNT,*/
49 	IWL_RATE_COUNT_LEGACY = IWL_RATE_COUNT - 1,	/* Excluding 60M */
50 	IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
51 	IWL_RATE_INVALID = IWL_RATE_COUNT,
52 };
53 
54 enum {
55 	IWL_RATE_6M_INDEX_TABLE = 0,
56 	IWL_RATE_9M_INDEX_TABLE,
57 	IWL_RATE_12M_INDEX_TABLE,
58 	IWL_RATE_18M_INDEX_TABLE,
59 	IWL_RATE_24M_INDEX_TABLE,
60 	IWL_RATE_36M_INDEX_TABLE,
61 	IWL_RATE_48M_INDEX_TABLE,
62 	IWL_RATE_54M_INDEX_TABLE,
63 	IWL_RATE_1M_INDEX_TABLE,
64 	IWL_RATE_2M_INDEX_TABLE,
65 	IWL_RATE_5M_INDEX_TABLE,
66 	IWL_RATE_11M_INDEX_TABLE,
67 	IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
68 };
69 
70 enum {
71 	IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
72 	IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
73 	IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
74 	IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
75 };
76 
77 /* #define vs. enum to keep from defaulting to 'large integer' */
78 #define	IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
79 #define	IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
80 #define	IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
81 #define	IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
82 #define	IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
83 #define	IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
84 #define	IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
85 #define	IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
86 #define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
87 #define	IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
88 #define	IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
89 #define	IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
90 #define	IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)
91 
92 /* uCode API values for legacy bit rates, both OFDM and CCK */
93 enum {
94 	IWL_RATE_6M_PLCP  = 13,
95 	IWL_RATE_9M_PLCP  = 15,
96 	IWL_RATE_12M_PLCP = 5,
97 	IWL_RATE_18M_PLCP = 7,
98 	IWL_RATE_24M_PLCP = 9,
99 	IWL_RATE_36M_PLCP = 11,
100 	IWL_RATE_48M_PLCP = 1,
101 	IWL_RATE_54M_PLCP = 3,
102 	IWL_RATE_60M_PLCP = 3,/*FIXME:RS:should be removed*/
103 	IWL_RATE_1M_PLCP  = 10,
104 	IWL_RATE_2M_PLCP  = 20,
105 	IWL_RATE_5M_PLCP  = 55,
106 	IWL_RATE_11M_PLCP = 110,
107 	/*FIXME:RS:change to IWL_RATE_LEGACY_??M_PLCP */
108 	/*FIXME:RS:add IWL_RATE_LEGACY_INVM_PLCP = 0,*/
109 };
110 
111 /* uCode API values for OFDM high-throughput (HT) bit rates */
112 enum {
113 	IWL_RATE_SISO_6M_PLCP = 0,
114 	IWL_RATE_SISO_12M_PLCP = 1,
115 	IWL_RATE_SISO_18M_PLCP = 2,
116 	IWL_RATE_SISO_24M_PLCP = 3,
117 	IWL_RATE_SISO_36M_PLCP = 4,
118 	IWL_RATE_SISO_48M_PLCP = 5,
119 	IWL_RATE_SISO_54M_PLCP = 6,
120 	IWL_RATE_SISO_60M_PLCP = 7,
121 	IWL_RATE_MIMO2_6M_PLCP  = 0x8,
122 	IWL_RATE_MIMO2_12M_PLCP = 0x9,
123 	IWL_RATE_MIMO2_18M_PLCP = 0xa,
124 	IWL_RATE_MIMO2_24M_PLCP = 0xb,
125 	IWL_RATE_MIMO2_36M_PLCP = 0xc,
126 	IWL_RATE_MIMO2_48M_PLCP = 0xd,
127 	IWL_RATE_MIMO2_54M_PLCP = 0xe,
128 	IWL_RATE_MIMO2_60M_PLCP = 0xf,
129 	IWL_RATE_MIMO3_6M_PLCP  = 0x10,
130 	IWL_RATE_MIMO3_12M_PLCP = 0x11,
131 	IWL_RATE_MIMO3_18M_PLCP = 0x12,
132 	IWL_RATE_MIMO3_24M_PLCP = 0x13,
133 	IWL_RATE_MIMO3_36M_PLCP = 0x14,
134 	IWL_RATE_MIMO3_48M_PLCP = 0x15,
135 	IWL_RATE_MIMO3_54M_PLCP = 0x16,
136 	IWL_RATE_MIMO3_60M_PLCP = 0x17,
137 	IWL_RATE_SISO_INVM_PLCP,
138 	IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
139 	IWL_RATE_MIMO3_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
140 };
141 
142 /* MAC header values for bit rates */
143 enum {
144 	IWL_RATE_6M_IEEE  = 12,
145 	IWL_RATE_9M_IEEE  = 18,
146 	IWL_RATE_12M_IEEE = 24,
147 	IWL_RATE_18M_IEEE = 36,
148 	IWL_RATE_24M_IEEE = 48,
149 	IWL_RATE_36M_IEEE = 72,
150 	IWL_RATE_48M_IEEE = 96,
151 	IWL_RATE_54M_IEEE = 108,
152 	IWL_RATE_60M_IEEE = 120,
153 	IWL_RATE_1M_IEEE  = 2,
154 	IWL_RATE_2M_IEEE  = 4,
155 	IWL_RATE_5M_IEEE  = 11,
156 	IWL_RATE_11M_IEEE = 22,
157 };
158 
159 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
160 
161 #define IWL_INVALID_VALUE    -1
162 
163 #define IWL_MIN_RSSI_VAL                 -100
164 #define IWL_MAX_RSSI_VAL                    0
165 
166 /* These values specify how many Tx frame attempts before
167  * searching for a new modulation mode */
168 #define IWL_LEGACY_FAILURE_LIMIT	160
169 #define IWL_LEGACY_SUCCESS_LIMIT	480
170 #define IWL_LEGACY_TABLE_COUNT		160
171 
172 #define IWL_NONE_LEGACY_FAILURE_LIMIT	400
173 #define IWL_NONE_LEGACY_SUCCESS_LIMIT	4500
174 #define IWL_NONE_LEGACY_TABLE_COUNT	1500
175 
176 /* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
177 #define IWL_RS_GOOD_RATIO		12800	/* 100% */
178 #define IWL_RATE_SCALE_SWITCH		10880	/*  85% */
179 #define IWL_RATE_HIGH_TH		10880	/*  85% */
180 #define IWL_RATE_INCREASE_TH		6400	/*  50% */
181 #define IWL_RATE_DECREASE_TH		1920	/*  15% */
182 
183 /* possible actions when in legacy mode */
184 #define IWL_LEGACY_SWITCH_ANTENNA1      0
185 #define IWL_LEGACY_SWITCH_ANTENNA2      1
186 #define IWL_LEGACY_SWITCH_SISO          2
187 #define IWL_LEGACY_SWITCH_MIMO2_AB      3
188 #define IWL_LEGACY_SWITCH_MIMO2_AC      4
189 #define IWL_LEGACY_SWITCH_MIMO2_BC      5
190 #define IWL_LEGACY_SWITCH_MIMO3_ABC     6
191 
192 /* possible actions when in siso mode */
193 #define IWL_SISO_SWITCH_ANTENNA1        0
194 #define IWL_SISO_SWITCH_ANTENNA2        1
195 #define IWL_SISO_SWITCH_MIMO2_AB        2
196 #define IWL_SISO_SWITCH_MIMO2_AC        3
197 #define IWL_SISO_SWITCH_MIMO2_BC        4
198 #define IWL_SISO_SWITCH_GI              5
199 #define IWL_SISO_SWITCH_MIMO3_ABC       6
200 
201 
202 /* possible actions when in mimo mode */
203 #define IWL_MIMO2_SWITCH_ANTENNA1       0
204 #define IWL_MIMO2_SWITCH_ANTENNA2       1
205 #define IWL_MIMO2_SWITCH_SISO_A         2
206 #define IWL_MIMO2_SWITCH_SISO_B         3
207 #define IWL_MIMO2_SWITCH_SISO_C         4
208 #define IWL_MIMO2_SWITCH_GI             5
209 #define IWL_MIMO2_SWITCH_MIMO3_ABC      6
210 
211 
212 /* possible actions when in mimo3 mode */
213 #define IWL_MIMO3_SWITCH_ANTENNA1       0
214 #define IWL_MIMO3_SWITCH_ANTENNA2       1
215 #define IWL_MIMO3_SWITCH_SISO_A         2
216 #define IWL_MIMO3_SWITCH_SISO_B         3
217 #define IWL_MIMO3_SWITCH_SISO_C         4
218 #define IWL_MIMO3_SWITCH_MIMO2_AB       5
219 #define IWL_MIMO3_SWITCH_MIMO2_AC       6
220 #define IWL_MIMO3_SWITCH_MIMO2_BC       7
221 #define IWL_MIMO3_SWITCH_GI             8
222 
223 
224 #define IWL_MAX_11N_MIMO3_SEARCH IWL_MIMO3_SWITCH_GI
225 #define IWL_MAX_SEARCH IWL_MIMO2_SWITCH_MIMO3_ABC
226 
227 /*FIXME:RS:add possible actions for MIMO3*/
228 
229 #define IWL_ACTION_LIMIT		3	/* # possible actions */
230 
231 #define LQ_SIZE		2	/* 2 mode tables:  "Active" and "Search" */
232 
233 /* load per tid defines for A-MPDU activation */
234 #define IWL_AGG_TPT_THREHOLD	0
235 #define IWL_AGG_LOAD_THRESHOLD	10
236 #define IWL_AGG_ALL_TID		0xff
237 #define TID_QUEUE_CELL_SPACING	50	/*mS */
238 #define TID_QUEUE_MAX_SIZE	20
239 #define TID_ROUND_VALUE		5	/* mS */
240 
241 #define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
242 #define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))
243 
244 extern const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
245 
246 enum iwl_table_type {
247 	LQ_NONE,
248 	LQ_G,		/* legacy types */
249 	LQ_A,
250 	LQ_SISO,	/* high-throughput types */
251 	LQ_MIMO2,
252 	LQ_MIMO3,
253 	LQ_MAX,
254 };
255 
256 #define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
257 #define is_siso(tbl) ((tbl) == LQ_SISO)
258 #define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
259 #define is_mimo3(tbl) ((tbl) == LQ_MIMO3)
260 #define is_mimo(tbl) (is_mimo2(tbl) || is_mimo3(tbl))
261 #define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
262 #define is_a_band(tbl) ((tbl) == LQ_A)
263 #define is_g_and(tbl) ((tbl) == LQ_G)
264 
265 #define IWL_MAX_MCS_DISPLAY_SIZE	12
266 
267 struct iwl_rate_mcs_info {
268 	char	mbps[IWL_MAX_MCS_DISPLAY_SIZE];
269 	char	mcs[IWL_MAX_MCS_DISPLAY_SIZE];
270 };
271 
272 /**
273  * struct iwl_rate_scale_data -- tx success history for one rate
274  */
275 struct iwl_rate_scale_data {
276 	u64 data;		/* bitmap of successful frames */
277 	s32 success_counter;	/* number of frames successful */
278 	s32 success_ratio;	/* per-cent * 128  */
279 	s32 counter;		/* number of frames attempted */
280 	s32 average_tpt;	/* success ratio * expected throughput */
281 	unsigned long stamp;
282 };
283 
284 /**
285  * struct iwl_scale_tbl_info -- tx params and success history for all rates
286  *
287  * There are two of these in struct iwl_lq_sta,
288  * one for "active", and one for "search".
289  */
290 struct iwl_scale_tbl_info {
291 	enum iwl_table_type lq_type;
292 	u8 ant_type;
293 	u8 is_SGI;	/* 1 = short guard interval */
294 	u8 is_ht40;	/* 1 = 40 MHz channel width */
295 	u8 is_dup;	/* 1 = duplicated data streams */
296 	u8 action;	/* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
297 	u8 max_search;	/* maximun number of tables we can search */
298 	const u16 *expected_tpt;	/* throughput metrics; expected_tpt_G, etc. */
299 	u32 current_rate;  /* rate_n_flags, uCode API format */
300 	struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
301 };
302 
303 struct iwl_traffic_load {
304 	unsigned long time_stamp;	/* age of the oldest statistics */
305 	u32 packet_count[TID_QUEUE_MAX_SIZE];   /* packet count in this time
306 						 * slice */
307 	u32 total;			/* total num of packets during the
308 					 * last TID_MAX_TIME_DIFF */
309 	u8 queue_count;			/* number of queues that has
310 					 * been used since the last cleanup */
311 	u8 head;			/* start of the circular buffer */
312 };
313 
314 /**
315  * struct iwl_lq_sta -- driver's rate scaling private structure
316  *
317  * Pointer to this gets passed back and forth between driver and mac80211.
318  */
319 struct iwl_lq_sta {
320 	u8 active_tbl;		/* index of active table, range 0-1 */
321 	u8 enable_counter;	/* indicates HT mode */
322 	u8 stay_in_tbl;		/* 1: disallow, 0: allow search for new mode */
323 	u8 search_better_tbl;	/* 1: currently trying alternate mode */
324 	s32 last_tpt;
325 
326 	/* The following determine when to search for a new mode */
327 	u32 table_count_limit;
328 	u32 max_failure_limit;	/* # failed frames before new search */
329 	u32 max_success_limit;	/* # successful frames before new search */
330 	u32 table_count;
331 	u32 total_failed;	/* total failed frames, any/all rates */
332 	u32 total_success;	/* total successful frames, any/all rates */
333 	u64 flush_timer;	/* time staying in mode before new search */
334 
335 	u8 action_counter;	/* # mode-switch actions tried */
336 	u8 is_green;
337 	u8 is_dup;
338 	enum nl80211_band band;
339 
340 	/* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
341 	u32 supp_rates;
342 	u16 active_legacy_rate;
343 	u16 active_siso_rate;
344 	u16 active_mimo2_rate;
345 	u16 active_mimo3_rate;
346 	s8 max_rate_idx;     /* Max rate set by user */
347 	u8 missed_rate_counter;
348 
349 	struct iwl_link_quality_cmd lq;
350 	struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
351 	struct iwl_traffic_load load[IWL_MAX_TID_COUNT];
352 	u8 tx_agg_tid_en;
353 #ifdef CONFIG_MAC80211_DEBUGFS
354 	u32 dbg_fixed_rate;
355 #endif
356 	struct iwl_priv *drv;
357 
358 	/* used to be in sta_info */
359 	int last_txrate_idx;
360 	/* last tx rate_n_flags */
361 	u32 last_rate_n_flags;
362 	/* packets destined for this STA are aggregated */
363 	u8 is_agg;
364 	/* BT traffic this sta was last updated in */
365 	u8 last_bt_traffic;
366 };
367 
first_antenna(u8 mask)368 static inline u8 first_antenna(u8 mask)
369 {
370 	if (mask & ANT_A)
371 		return ANT_A;
372 	if (mask & ANT_B)
373 		return ANT_B;
374 	return ANT_C;
375 }
376 
377 
378 /* Initialize station's rate scaling information after adding station */
379 void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta,
380 		      u8 sta_id);
381 
382 /**
383  * iwl_rate_control_register - Register the rate control algorithm callbacks
384  *
385  * Since the rate control algorithm is hardware specific, there is no need
386  * or reason to place it as a stand alone module.  The driver can call
387  * iwl_rate_control_register in order to register the rate control callbacks
388  * with the mac80211 subsystem.  This should be performed prior to calling
389  * ieee80211_register_hw
390  *
391  */
392 int iwlagn_rate_control_register(void);
393 
394 /**
395  * iwl_rate_control_unregister - Unregister the rate control callbacks
396  *
397  * This should be called after calling ieee80211_unregister_hw, but before
398  * the driver is unloaded.
399  */
400 void iwlagn_rate_control_unregister(void);
401 
402 #endif /* __iwl_agn__rs__ */
403