summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwlwifi/iwl-agn-rs.h
blob: 3b06c9da77e385739e22d1ac111501297efdd5c9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
/******************************************************************************
 *
 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

#ifndef __iwl_agn_rs_h__
#define __iwl_agn_rs_h__

#include "iwl-dev.h"

struct iwl_rate_info {
	u8 plcp;	/* uCode API:  IWL_RATE_6M_PLCP, etc. */
	u8 plcp_siso;	/* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
	u8 plcp_mimo2;	/* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
	u8 plcp_mimo3;  /* uCode API:  IWL_RATE_MIMO3_6M_PLCP, etc. */
	u8 ieee;	/* MAC header:  IWL_RATE_6M_IEEE, etc. */
	u8 prev_ieee;    /* previous rate in IEEE speeds */
	u8 next_ieee;    /* next rate in IEEE speeds */
	u8 prev_rs;      /* previous rate used in rs algo */
	u8 next_rs;      /* next rate used in rs algo */
	u8 prev_rs_tgg;  /* previous rate used in TGG rs algo */
	u8 next_rs_tgg;  /* next rate used in TGG rs algo */
};

/*
 * These serve as indexes into
 * struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
 */
enum {
	IWL_RATE_1M_INDEX = 0,
	IWL_RATE_2M_INDEX,
	IWL_RATE_5M_INDEX,
	IWL_RATE_11M_INDEX,
	IWL_RATE_6M_INDEX,
	IWL_RATE_9M_INDEX,
	IWL_RATE_12M_INDEX,
	IWL_RATE_18M_INDEX,
	IWL_RATE_24M_INDEX,
	IWL_RATE_36M_INDEX,
	IWL_RATE_48M_INDEX,
	IWL_RATE_54M_INDEX,
	IWL_RATE_60M_INDEX,
	IWL_RATE_COUNT, /*FIXME:RS:change to IWL_RATE_INDEX_COUNT,*/
	IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
	IWL_RATE_INVALID = IWL_RATE_COUNT,
};

enum {
	IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
	IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
	IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
	IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
};

/* #define vs. enum to keep from defaulting to 'large integer' */
#define	IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
#define	IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
#define	IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
#define	IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
#define	IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
#define	IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
#define	IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
#define	IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
#define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
#define	IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
#define	IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
#define	IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
#define	IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)

/* uCode API values for legacy bit rates, both OFDM and CCK */
enum {
	IWL_RATE_6M_PLCP  = 13,
	IWL_RATE_9M_PLCP  = 15,
	IWL_RATE_12M_PLCP = 5,
	IWL_RATE_18M_PLCP = 7,
	IWL_RATE_24M_PLCP = 9,
	IWL_RATE_36M_PLCP = 11,
	IWL_RATE_48M_PLCP = 1,
	IWL_RATE_54M_PLCP = 3,
	IWL_RATE_60M_PLCP = 3,/*FIXME:RS:should be removed*/
	IWL_RATE_1M_PLCP  = 10,
	IWL_RATE_2M_PLCP  = 20,
	IWL_RATE_5M_PLCP  = 55,
	IWL_RATE_11M_PLCP = 110,
	/*FIXME:RS:change to IWL_RATE_LEGACY_??M_PLCP */
	/*FIXME:RS:add IWL_RATE_LEGACY_INVM_PLCP = 0,*/
};

/* uCode API values for OFDM high-throughput (HT) bit rates */
enum {
	IWL_RATE_SISO_6M_PLCP = 0,
	IWL_RATE_SISO_12M_PLCP = 1,
	IWL_RATE_SISO_18M_PLCP = 2,
	IWL_RATE_SISO_24M_PLCP = 3,
	IWL_RATE_SISO_36M_PLCP = 4,
	IWL_RATE_SISO_48M_PLCP = 5,
	IWL_RATE_SISO_54M_PLCP = 6,
	IWL_RATE_SISO_60M_PLCP = 7,
	IWL_RATE_MIMO2_6M_PLCP  = 0x8,
	IWL_RATE_MIMO2_12M_PLCP = 0x9,
	IWL_RATE_MIMO2_18M_PLCP = 0xa,
	IWL_RATE_MIMO2_24M_PLCP = 0xb,
	IWL_RATE_MIMO2_36M_PLCP = 0xc,
	IWL_RATE_MIMO2_48M_PLCP = 0xd,
	IWL_RATE_MIMO2_54M_PLCP = 0xe,
	IWL_RATE_MIMO2_60M_PLCP = 0xf,
	IWL_RATE_MIMO3_6M_PLCP  = 0x10,
	IWL_RATE_MIMO3_12M_PLCP = 0x11,
	IWL_RATE_MIMO3_18M_PLCP = 0x12,
	IWL_RATE_MIMO3_24M_PLCP = 0x13,
	IWL_RATE_MIMO3_36M_PLCP = 0x14,
	IWL_RATE_MIMO3_48M_PLCP = 0x15,
	IWL_RATE_MIMO3_54M_PLCP = 0x16,
	IWL_RATE_MIMO3_60M_PLCP = 0x17,
	IWL_RATE_SISO_INVM_PLCP,
	IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
	IWL_RATE_MIMO3_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
};

/* MAC header values for bit rates */
enum {
	IWL_RATE_6M_IEEE  = 12,
	IWL_RATE_9M_IEEE  = 18,
	IWL_RATE_12M_IEEE = 24,
	IWL_RATE_18M_IEEE = 36,
	IWL_RATE_24M_IEEE = 48,
	IWL_RATE_36M_IEEE = 72,
	IWL_RATE_48M_IEEE = 96,
	IWL_RATE_54M_IEEE = 108,
	IWL_RATE_60M_IEEE = 120,
	IWL_RATE_1M_IEEE  = 2,
	IWL_RATE_2M_IEEE  = 4,
	IWL_RATE_5M_IEEE  = 11,
	IWL_RATE_11M_IEEE = 22,
};

#define IWL_CCK_BASIC_RATES_MASK    \
       (IWL_RATE_1M_MASK          | \
	IWL_RATE_2M_MASK)

#define IWL_CCK_RATES_MASK          \
       (IWL_BASIC_RATES_MASK      | \
	IWL_RATE_5M_MASK          | \
	IWL_RATE_11M_MASK)

#define IWL_OFDM_BASIC_RATES_MASK   \
	(IWL_RATE_6M_MASK         | \
	IWL_RATE_12M_MASK         | \
	IWL_RATE_24M_MASK)

#define IWL_OFDM_RATES_MASK         \
       (IWL_OFDM_BASIC_RATES_MASK | \
	IWL_RATE_9M_MASK          | \
	IWL_RATE_18M_MASK         | \
	IWL_RATE_36M_MASK         | \
	IWL_RATE_48M_MASK         | \
	IWL_RATE_54M_MASK)

#define IWL_BASIC_RATES_MASK         \
	(IWL_OFDM_BASIC_RATES_MASK | \
	 IWL_CCK_BASIC_RATES_MASK)

#define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)

#define IWL_INVALID_VALUE    -1

#define IWL_MIN_RSSI_VAL                 -100
#define IWL_MAX_RSSI_VAL                    0

/* These values specify how many Tx frame attempts before
 * searching for a new modulation mode */
#define IWL_LEGACY_FAILURE_LIMIT	160
#define IWL_LEGACY_SUCCESS_LIMIT	480
#define IWL_LEGACY_TABLE_COUNT		160

#define IWL_NONE_LEGACY_FAILURE_LIMIT	400
#define IWL_NONE_LEGACY_SUCCESS_LIMIT	4500
#define IWL_NONE_LEGACY_TABLE_COUNT	1500

/* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
#define IWL_RS_GOOD_RATIO		12800	/* 100% */
#define IWL_RATE_SCALE_SWITCH		10880	/*  85% */
#define IWL_RATE_HIGH_TH		10880	/*  85% */
#define IWL_RATE_INCREASE_TH            8960	/*  70% */
#define IWL_RATE_DECREASE_TH		1920	/*  15% */

/* possible actions when in legacy mode */
#define IWL_LEGACY_SWITCH_ANTENNA	0
#define IWL_LEGACY_SWITCH_SISO		1
#define IWL_LEGACY_SWITCH_MIMO2		2

/* possible actions when in siso mode */
#define IWL_SISO_SWITCH_ANTENNA		0
#define IWL_SISO_SWITCH_MIMO2		1
#define IWL_SISO_SWITCH_GI		2

/* possible actions when in mimo mode */
#define IWL_MIMO_SWITCH_ANTENNA_A	0
#define IWL_MIMO_SWITCH_ANTENNA_B	1
#define IWL_MIMO_SWITCH_GI		2

/*FIXME:RS:separate MIMO2/3 transitions*/

/*FIXME:RS:add posible acctions for MIMO3*/

#define IWL_ACTION_LIMIT		3	/* # possible actions */

#define LQ_SIZE		2	/* 2 mode tables:  "Active" and "Search" */

/* load per tid defines for A-MPDU activation */
#define IWL_AGG_TPT_THREHOLD	0
#define IWL_AGG_LOAD_THRESHOLD	10
#define IWL_AGG_ALL_TID		0xff
#define TID_QUEUE_CELL_SPACING	50	/*mS */
#define TID_QUEUE_MAX_SIZE	20
#define TID_ROUND_VALUE		5	/* mS */
#define TID_MAX_LOAD_COUNT	8

#define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
#define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))

extern const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];

enum iwl_table_type {
	LQ_NONE,
	LQ_G,		/* legacy types */
	LQ_A,
	LQ_SISO,	/* high-throughput types */
	LQ_MIMO2,
	LQ_MIMO3,
	LQ_MAX,
};

#define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
#define is_siso(tbl) ((tbl) == LQ_SISO)
#define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
#define is_mimo3(tbl) ((tbl) == LQ_MIMO3)
#define is_mimo(tbl) (is_mimo2(tbl) || is_mimo3(tbl))
#define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
#define is_a_band(tbl) ((tbl) == LQ_A)
#define is_g_and(tbl) ((tbl) == LQ_G)

#define	ANT_NONE	0x0
#define	ANT_A		BIT(0)
#define	ANT_B		BIT(1)
#define	ANT_AB		(ANT_A | ANT_B)
#define ANT_C		BIT(2)
#define	ANT_AC		(ANT_A | ANT_C)
#define ANT_BC		(ANT_B | ANT_C)
#define ANT_ABC		(ANT_AB | ANT_C)

static inline u8 num_of_ant(u8 mask)
{
	return  !!((mask) & ANT_A) +
		!!((mask) & ANT_B) +
		!!((mask) & ANT_C);
}

static inline u8 iwl4965_get_prev_ieee_rate(u8 rate_index)
{
	u8 rate = iwl_rates[rate_index].prev_ieee;

	if (rate == IWL_RATE_INVALID)
		rate = rate_index;
	return rate;
}

/**
 * iwl4965_fill_rs_info - Fill an output text buffer with the rate representation
 *
 * NOTE:  This is provided as a quick mechanism for a user to visualize
 * the performance of the rate control algorithm and is not meant to be
 * parsed software.
 */
extern int iwl4965_fill_rs_info(struct ieee80211_hw *, char *buf, u8 sta_id);

/**
 * iwl4965_rate_control_register - Register the rate control algorithm callbacks
 *
 * Since the rate control algorithm is hardware specific, there is no need
 * or reason to place it as a stand alone module.  The driver can call
 * iwl4965_rate_control_register in order to register the rate control callbacks
 * with the mac80211 subsystem.  This should be performed prior to calling
 * ieee80211_register_hw
 *
 */
extern int iwlagn_rate_control_register(void);

/**
 * iwl4965_rate_control_unregister - Unregister the rate control callbacks
 *
 * This should be called after calling ieee80211_unregister_hw, but before
 * the driver is unloaded.
 */
extern void iwlagn_rate_control_unregister(void);

#endif /* __iwl_agn__rs__ */