1/*
2 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#ifndef __RC_MINSTREL_HT_H
10#define __RC_MINSTREL_HT_H
11
12/*
13 * The number of streams can be changed to 2 to reduce code
14 * size and memory footprint.
15 */
16#define MINSTREL_MAX_STREAMS		3
17#define MINSTREL_HT_STREAM_GROUPS	4 /* BW(=2) * SGI(=2) */
18#ifdef CONFIG_MAC80211_RC_MINSTREL_VHT
19#define MINSTREL_VHT_STREAM_GROUPS	6 /* BW(=3) * SGI(=2) */
20#else
21#define MINSTREL_VHT_STREAM_GROUPS	0
22#endif
23
24#define MINSTREL_HT_GROUPS_NB	(MINSTREL_MAX_STREAMS *		\
25				 MINSTREL_HT_STREAM_GROUPS)
26#define MINSTREL_VHT_GROUPS_NB	(MINSTREL_MAX_STREAMS *		\
27				 MINSTREL_VHT_STREAM_GROUPS)
28#define MINSTREL_CCK_GROUPS_NB	1
29#define MINSTREL_GROUPS_NB	(MINSTREL_HT_GROUPS_NB +	\
30				 MINSTREL_VHT_GROUPS_NB +	\
31				 MINSTREL_CCK_GROUPS_NB)
32
33#define MINSTREL_HT_GROUP_0	0
34#define MINSTREL_CCK_GROUP	(MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB)
35#define MINSTREL_VHT_GROUP_0	(MINSTREL_CCK_GROUP + 1)
36
37#ifdef CONFIG_MAC80211_RC_MINSTREL_VHT
38#define MCS_GROUP_RATES		10
39#else
40#define MCS_GROUP_RATES		8
41#endif
42
43struct mcs_group {
44	u32 flags;
45	unsigned int streams;
46	unsigned int duration[MCS_GROUP_RATES];
47};
48
49extern const struct mcs_group minstrel_mcs_groups[];
50
51struct minstrel_mcs_group_data {
52	u8 index;
53	u8 column;
54
55	/* bitfield of supported MCS rates of this group */
56	u16 supported;
57
58	/* sorted rate set within a MCS group*/
59	u16 max_group_tp_rate[MAX_THR_RATES];
60	u16 max_group_prob_rate;
61
62	/* MCS rate statistics */
63	struct minstrel_rate_stats rates[MCS_GROUP_RATES];
64};
65
66struct minstrel_ht_sta {
67	struct ieee80211_sta *sta;
68
69	/* ampdu length (average, per sampling interval) */
70	unsigned int ampdu_len;
71	unsigned int ampdu_packets;
72
73	/* ampdu length (EWMA) */
74	unsigned int avg_ampdu_len;
75
76	/* overall sorted rate set */
77	u16 max_tp_rate[MAX_THR_RATES];
78	u16 max_prob_rate;
79
80	/* time of last status update */
81	unsigned long last_stats_update;
82
83	/* overhead time in usec for each frame */
84	unsigned int overhead;
85	unsigned int overhead_rtscts;
86
87	unsigned int total_packets;
88	unsigned int sample_packets;
89
90	/* tx flags to add for frames for this sta */
91	u32 tx_flags;
92
93	u8 sample_wait;
94	u8 sample_tries;
95	u8 sample_count;
96	u8 sample_slow;
97
98	/* current MCS group to be sampled */
99	u8 sample_group;
100
101	u8 cck_supported;
102	u8 cck_supported_short;
103
104	/* MCS rate group info and statistics */
105	struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
106};
107
108struct minstrel_ht_sta_priv {
109	union {
110		struct minstrel_ht_sta ht;
111		struct minstrel_sta_info legacy;
112	};
113#ifdef CONFIG_MAC80211_DEBUGFS
114	struct dentry *dbg_stats;
115	struct dentry *dbg_stats_csv;
116#endif
117	void *ratelist;
118	void *sample_table;
119	bool is_ht;
120};
121
122void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
123void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
124int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
125			   int prob_ewma);
126
127#endif
128