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ieee80211_phy.h (193072) ieee80211_phy.h (252727)
1/*-
2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 8 unchanged lines hidden (view full) ---

17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
1/*-
2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 8 unchanged lines hidden (view full) ---

17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $FreeBSD: head/sys/net80211/ieee80211_phy.h 193072 2009-05-29 23:39:16Z sam $
25 * $FreeBSD: head/sys/net80211/ieee80211_phy.h 252727 2013-07-04 21:16:49Z adrian $
26 */
27
28#ifndef _NET80211_IEEE80211_PHY_H_
29#define _NET80211_IEEE80211_PHY_H_
30
31#ifdef _KERNEL
32/*
33 * IEEE 802.11 PHY-related definitions.

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55
56/*
57 * DIFS (microseconds).
58 */
59#define IEEE80211_DUR_DIFS(sifs, slot) ((sifs) + 2 * (slot))
60
61struct ieee80211_channel;
62
26 */
27
28#ifndef _NET80211_IEEE80211_PHY_H_
29#define _NET80211_IEEE80211_PHY_H_
30
31#ifdef _KERNEL
32/*
33 * IEEE 802.11 PHY-related definitions.

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55
56/*
57 * DIFS (microseconds).
58 */
59#define IEEE80211_DUR_DIFS(sifs, slot) ((sifs) + 2 * (slot))
60
61struct ieee80211_channel;
62
63#define IEEE80211_RATE_TABLE_SIZE 128
64
63struct ieee80211_rate_table {
64 int rateCount; /* NB: for proper padding */
65 uint8_t rateCodeToIndex[256]; /* back mapping */
66 struct {
67 uint8_t phy; /* CCK/OFDM/TURBO */
68 uint32_t rateKbps; /* transfer rate in kbs */
69 uint8_t shortPreamble; /* mask for enabling short
70 * preamble in CCK rate code */
71 uint8_t dot11Rate; /* value for supported rates
72 * info element of MLME */
73 uint8_t ctlRateIndex; /* index of next lower basic
74 * rate; used for dur. calcs */
75 uint16_t lpAckDuration; /* long preamble ACK dur. */
76 uint16_t spAckDuration; /* short preamble ACK dur. */
65struct ieee80211_rate_table {
66 int rateCount; /* NB: for proper padding */
67 uint8_t rateCodeToIndex[256]; /* back mapping */
68 struct {
69 uint8_t phy; /* CCK/OFDM/TURBO */
70 uint32_t rateKbps; /* transfer rate in kbs */
71 uint8_t shortPreamble; /* mask for enabling short
72 * preamble in CCK rate code */
73 uint8_t dot11Rate; /* value for supported rates
74 * info element of MLME */
75 uint8_t ctlRateIndex; /* index of next lower basic
76 * rate; used for dur. calcs */
77 uint16_t lpAckDuration; /* long preamble ACK dur. */
78 uint16_t spAckDuration; /* short preamble ACK dur. */
77 } info[32];
79 } info[IEEE80211_RATE_TABLE_SIZE];
78};
79
80const struct ieee80211_rate_table *ieee80211_get_ratetable(
81 struct ieee80211_channel *);
82
83static __inline__ uint8_t
84ieee80211_ack_rate(const struct ieee80211_rate_table *rt, uint8_t rate)
85{
80};
81
82const struct ieee80211_rate_table *ieee80211_get_ratetable(
83 struct ieee80211_channel *);
84
85static __inline__ uint8_t
86ieee80211_ack_rate(const struct ieee80211_rate_table *rt, uint8_t rate)
87{
86 uint8_t cix = rt->info[rt->rateCodeToIndex[rate]].ctlRateIndex;
88 /*
89 * XXX Assert this is for a legacy rate; not for an MCS rate.
90 * If the caller wishes to use it for a basic rate, they should
91 * clear the high bit first.
92 */
93 KASSERT(! (rate & 0x80), ("rate %d is basic/mcs?", rate));
94
95 uint8_t cix = rt->info[rt->rateCodeToIndex[rate & IEEE80211_RATE_VAL]].ctlRateIndex;
87 KASSERT(cix != (uint8_t)-1, ("rate %d has no info", rate));
88 return rt->info[cix].dot11Rate;
89}
90
91static __inline__ uint8_t
92ieee80211_ctl_rate(const struct ieee80211_rate_table *rt, uint8_t rate)
93{
96 KASSERT(cix != (uint8_t)-1, ("rate %d has no info", rate));
97 return rt->info[cix].dot11Rate;
98}
99
100static __inline__ uint8_t
101ieee80211_ctl_rate(const struct ieee80211_rate_table *rt, uint8_t rate)
102{
94 uint8_t cix = rt->info[rt->rateCodeToIndex[rate]].ctlRateIndex;
103 /*
104 * XXX Assert this is for a legacy rate; not for an MCS rate.
105 * If the caller wishes to use it for a basic rate, they should
106 * clear the high bit first.
107 */
108 KASSERT(! (rate & 0x80), ("rate %d is basic/mcs?", rate));
109
110 uint8_t cix = rt->info[rt->rateCodeToIndex[rate & IEEE80211_RATE_VAL]].ctlRateIndex;
95 KASSERT(cix != (uint8_t)-1, ("rate %d has no info", rate));
96 return rt->info[cix].dot11Rate;
97}
98
99static __inline__ enum ieee80211_phytype
100ieee80211_rate2phytype(const struct ieee80211_rate_table *rt, uint8_t rate)
101{
111 KASSERT(cix != (uint8_t)-1, ("rate %d has no info", rate));
112 return rt->info[cix].dot11Rate;
113}
114
115static __inline__ enum ieee80211_phytype
116ieee80211_rate2phytype(const struct ieee80211_rate_table *rt, uint8_t rate)
117{
102 uint8_t rix = rt->rateCodeToIndex[rate];
118 /*
119 * XXX Assert this is for a legacy rate; not for an MCS rate.
120 * If the caller wishes to use it for a basic rate, they should
121 * clear the high bit first.
122 */
123 KASSERT(! (rate & 0x80), ("rate %d is basic/mcs?", rate));
124
125 uint8_t rix = rt->rateCodeToIndex[rate & IEEE80211_RATE_VAL];
103 KASSERT(rix != (uint8_t)-1, ("rate %d has no info", rate));
104 return rt->info[rix].phy;
105}
106
107static __inline__ int
108ieee80211_isratevalid(const struct ieee80211_rate_table *rt, uint8_t rate)
109{
126 KASSERT(rix != (uint8_t)-1, ("rate %d has no info", rate));
127 return rt->info[rix].phy;
128}
129
130static __inline__ int
131ieee80211_isratevalid(const struct ieee80211_rate_table *rt, uint8_t rate)
132{
133 /*
134 * XXX Assert this is for a legacy rate; not for an MCS rate.
135 * If the caller wishes to use it for a basic rate, they should
136 * clear the high bit first.
137 */
138 KASSERT(! (rate & 0x80), ("rate %d is basic/mcs?", rate));
139
110 return rt->rateCodeToIndex[rate] != (uint8_t)-1;
111}
112
113/*
114 * Calculate ACK field for
115 * o non-fragment data frames
116 * o management frames
117 * sent using rate, phy and short preamble setting.

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129 return rt->info[rix].spAckDuration;
130 } else {
131 KASSERT(rt->info[rix].lpAckDuration != 0,
132 ("lgpreamble ack dur is not computed!\n"));
133 return rt->info[rix].lpAckDuration;
134 }
135}
136
140 return rt->rateCodeToIndex[rate] != (uint8_t)-1;
141}
142
143/*
144 * Calculate ACK field for
145 * o non-fragment data frames
146 * o management frames
147 * sent using rate, phy and short preamble setting.

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159 return rt->info[rix].spAckDuration;
160 } else {
161 KASSERT(rt->info[rix].lpAckDuration != 0,
162 ("lgpreamble ack dur is not computed!\n"));
163 return rt->info[rix].lpAckDuration;
164 }
165}
166
167static __inline__ uint8_t
168ieee80211_legacy_rate_lookup(const struct ieee80211_rate_table *rt,
169 uint8_t rate)
170{
171
172 return (rt->rateCodeToIndex[rate & IEEE80211_RATE_VAL]);
173}
174
137/*
138 * Compute the time to transmit a frame of length frameLen bytes
139 * using the specified 802.11 rate code, phy, and short preamble
140 * setting.
141 *
142 * NB: SIFS is included.
143 */
144uint16_t ieee80211_compute_duration(const struct ieee80211_rate_table *,
145 uint32_t frameLen, uint16_t rate, int isShortPreamble);
146/*
147 * Convert PLCP signal/rate field to 802.11 rate code (.5Mbits/s)
148 */
149uint8_t ieee80211_plcp2rate(uint8_t, enum ieee80211_phytype);
150/*
151 * Convert 802.11 rate code to PLCP signal.
152 */
153uint8_t ieee80211_rate2plcp(int, enum ieee80211_phytype);
175/*
176 * Compute the time to transmit a frame of length frameLen bytes
177 * using the specified 802.11 rate code, phy, and short preamble
178 * setting.
179 *
180 * NB: SIFS is included.
181 */
182uint16_t ieee80211_compute_duration(const struct ieee80211_rate_table *,
183 uint32_t frameLen, uint16_t rate, int isShortPreamble);
184/*
185 * Convert PLCP signal/rate field to 802.11 rate code (.5Mbits/s)
186 */
187uint8_t ieee80211_plcp2rate(uint8_t, enum ieee80211_phytype);
188/*
189 * Convert 802.11 rate code to PLCP signal.
190 */
191uint8_t ieee80211_rate2plcp(int, enum ieee80211_phytype);
192
193uint32_t ieee80211_compute_duration_ht(uint32_t frameLen,
194 uint16_t rate, int streams, int isht40,
195 int isShortGI);
196
154#endif /* _KERNEL */
155#endif /* !_NET80211_IEEE80211_PHY_H_ */
197#endif /* _KERNEL */
198#endif /* !_NET80211_IEEE80211_PHY_H_ */