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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * IEEE 802.11 HT definitions
4 *
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6 * <jkmaline@cc.hut.fi>
7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
8 * Copyright (c) 2005, Devicescape Software, Inc.
9 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
10 * Copyright (c) 2013 - 2014 Intel Mobile Communications GmbH
11 * Copyright (c) 2016 - 2017 Intel Deutschland GmbH
12 * Copyright (c) 2018 - 2025 Intel Corporation
13 */
14
15#ifndef LINUX_IEEE80211_HT_H
16#define LINUX_IEEE80211_HT_H
17
18#include <linux/types.h>
19#include <linux/if_ether.h>
20
21/* Maximal size of an A-MSDU that can be transported in a HT BA session */
22#define IEEE80211_MAX_MPDU_LEN_HT_BA 4095
23
24/* Maximal size of an A-MSDU */
25#define IEEE80211_MAX_MPDU_LEN_HT_3839 3839
26#define IEEE80211_MAX_MPDU_LEN_HT_7935 7935
27
28#define IEEE80211_HT_CTL_LEN 4
29
30enum ieee80211_ht_chanwidth_values {
31 IEEE80211_HT_CHANWIDTH_20MHZ = 0,
32 IEEE80211_HT_CHANWIDTH_ANY = 1,
33};
34
35/**
36 * struct ieee80211_bar - Block Ack Request frame format
37 * @frame_control: Frame Control
38 * @duration: Duration
39 * @ra: RA
40 * @ta: TA
41 * @control: BAR Control
42 * @start_seq_num: Starting Sequence Number (see Figure 9-37)
43 *
44 * This structure represents the "BlockAckReq frame format"
45 * as described in IEEE Std 802.11-2020 section 9.3.1.7.
46*/
47struct ieee80211_bar {
48 __le16 frame_control;
49 __le16 duration;
50 __u8 ra[ETH_ALEN];
51 __u8 ta[ETH_ALEN];
52 __le16 control;
53 __le16 start_seq_num;
54} __packed;
55
56/* 802.11 BAR control masks */
57#define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL 0x0000
58#define IEEE80211_BAR_CTRL_MULTI_TID 0x0002
59#define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA 0x0004
60#define IEEE80211_BAR_CTRL_TID_INFO_MASK 0xf000
61#define IEEE80211_BAR_CTRL_TID_INFO_SHIFT 12
62
63#define IEEE80211_HT_MCS_MASK_LEN 10
64
65/**
66 * struct ieee80211_mcs_info - Supported MCS Set field
67 * @rx_mask: RX mask
68 * @rx_highest: highest supported RX rate. If set represents
69 * the highest supported RX data rate in units of 1 Mbps.
70 * If this field is 0 this value should not be used to
71 * consider the highest RX data rate supported.
72 * @tx_params: TX parameters
73 * @reserved: Reserved bits
74 *
75 * This structure represents the "Supported MCS Set field" as
76 * described in IEEE Std 802.11-2020 section 9.4.2.55.4.
77 */
78struct ieee80211_mcs_info {
79 u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
80 __le16 rx_highest;
81 u8 tx_params;
82 u8 reserved[3];
83} __packed;
84
85/* 802.11n HT capability MSC set */
86#define IEEE80211_HT_MCS_RX_HIGHEST_MASK 0x3ff
87#define IEEE80211_HT_MCS_TX_DEFINED 0x01
88#define IEEE80211_HT_MCS_TX_RX_DIFF 0x02
89/* value 0 == 1 stream etc */
90#define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK 0x0C
91#define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT 2
92#define IEEE80211_HT_MCS_TX_MAX_STREAMS 4
93#define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION 0x10
94
95#define IEEE80211_HT_MCS_CHAINS(mcs) ((mcs) == 32 ? 1 : (1 + ((mcs) >> 3)))
96
97/*
98 * 802.11n D5.0 20.3.5 / 20.6 says:
99 * - indices 0 to 7 and 32 are single spatial stream
100 * - 8 to 31 are multiple spatial streams using equal modulation
101 * [8..15 for two streams, 16..23 for three and 24..31 for four]
102 * - remainder are multiple spatial streams using unequal modulation
103 */
104#define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33
105#define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \
106 (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8)
107
108/**
109 * struct ieee80211_ht_cap - HT capabilities element
110 * @cap_info: HT Capability Information
111 * @ampdu_params_info: A-MPDU Parameters
112 * @mcs: Supported MCS Set
113 * @extended_ht_cap_info: HT Extended Capabilities
114 * @tx_BF_cap_info: Transmit Beamforming Capabilities
115 * @antenna_selection_info: ASEL Capability
116 *
117 * This structure represents the payload of the "HT Capabilities
118 * element" as described in IEEE Std 802.11-2020 section 9.4.2.55.
119 */
120struct ieee80211_ht_cap {
121 __le16 cap_info;
122 u8 ampdu_params_info;
123
124 /* 16 bytes MCS information */
125 struct ieee80211_mcs_info mcs;
126
127 __le16 extended_ht_cap_info;
128 __le32 tx_BF_cap_info;
129 u8 antenna_selection_info;
130} __packed;
131
132/* 802.11n HT capabilities masks (for cap_info) */
133#define IEEE80211_HT_CAP_LDPC_CODING 0x0001
134#define IEEE80211_HT_CAP_SUP_WIDTH_20_40 0x0002
135#define IEEE80211_HT_CAP_SM_PS 0x000C
136#define IEEE80211_HT_CAP_SM_PS_SHIFT 2
137#define IEEE80211_HT_CAP_GRN_FLD 0x0010
138#define IEEE80211_HT_CAP_SGI_20 0x0020
139#define IEEE80211_HT_CAP_SGI_40 0x0040
140#define IEEE80211_HT_CAP_TX_STBC 0x0080
141#define IEEE80211_HT_CAP_RX_STBC 0x0300
142#define IEEE80211_HT_CAP_RX_STBC_SHIFT 8
143#define IEEE80211_HT_CAP_DELAY_BA 0x0400
144#define IEEE80211_HT_CAP_MAX_AMSDU 0x0800
145#define IEEE80211_HT_CAP_DSSSCCK40 0x1000
146#define IEEE80211_HT_CAP_RESERVED 0x2000
147#define IEEE80211_HT_CAP_40MHZ_INTOLERANT 0x4000
148#define IEEE80211_HT_CAP_LSIG_TXOP_PROT 0x8000
149
150/* 802.11n HT extended capabilities masks (for extended_ht_cap_info) */
151#define IEEE80211_HT_EXT_CAP_PCO 0x0001
152#define IEEE80211_HT_EXT_CAP_PCO_TIME 0x0006
153#define IEEE80211_HT_EXT_CAP_PCO_TIME_SHIFT 1
154#define IEEE80211_HT_EXT_CAP_MCS_FB 0x0300
155#define IEEE80211_HT_EXT_CAP_MCS_FB_SHIFT 8
156#define IEEE80211_HT_EXT_CAP_HTC_SUP 0x0400
157#define IEEE80211_HT_EXT_CAP_RD_RESPONDER 0x0800
158
159/* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
160#define IEEE80211_HT_AMPDU_PARM_FACTOR 0x03
161#define IEEE80211_HT_AMPDU_PARM_DENSITY 0x1C
162#define IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT 2
163
164/*
165 * Maximum length of AMPDU that the STA can receive in high-throughput (HT).
166 * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
167 */
168enum ieee80211_max_ampdu_length_exp {
169 IEEE80211_HT_MAX_AMPDU_8K = 0,
170 IEEE80211_HT_MAX_AMPDU_16K = 1,
171 IEEE80211_HT_MAX_AMPDU_32K = 2,
172 IEEE80211_HT_MAX_AMPDU_64K = 3
173};
174
175#define IEEE80211_HT_MAX_AMPDU_FACTOR 13
176
177/* Minimum MPDU start spacing */
178enum ieee80211_min_mpdu_spacing {
179 IEEE80211_HT_MPDU_DENSITY_NONE = 0, /* No restriction */
180 IEEE80211_HT_MPDU_DENSITY_0_25 = 1, /* 1/4 usec */
181 IEEE80211_HT_MPDU_DENSITY_0_5 = 2, /* 1/2 usec */
182 IEEE80211_HT_MPDU_DENSITY_1 = 3, /* 1 usec */
183 IEEE80211_HT_MPDU_DENSITY_2 = 4, /* 2 usec */
184 IEEE80211_HT_MPDU_DENSITY_4 = 5, /* 4 usec */
185 IEEE80211_HT_MPDU_DENSITY_8 = 6, /* 8 usec */
186 IEEE80211_HT_MPDU_DENSITY_16 = 7 /* 16 usec */
187};
188
189/**
190 * struct ieee80211_ht_operation - HT operation IE
191 * @primary_chan: Primary Channel
192 * @ht_param: HT Operation Information parameters
193 * @operation_mode: HT Operation Information operation mode
194 * @stbc_param: HT Operation Information STBC params
195 * @basic_set: Basic HT-MCS Set
196 *
197 * This structure represents the payload of the "HT Operation
198 * element" as described in IEEE Std 802.11-2020 section 9.4.2.56.
199 */
200struct ieee80211_ht_operation {
201 u8 primary_chan;
202 u8 ht_param;
203 __le16 operation_mode;
204 __le16 stbc_param;
205 u8 basic_set[16];
206} __packed;
207
208/* for ht_param */
209#define IEEE80211_HT_PARAM_CHA_SEC_OFFSET 0x03
210#define IEEE80211_HT_PARAM_CHA_SEC_NONE 0x00
211#define IEEE80211_HT_PARAM_CHA_SEC_ABOVE 0x01
212#define IEEE80211_HT_PARAM_CHA_SEC_BELOW 0x03
213#define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY 0x04
214#define IEEE80211_HT_PARAM_RIFS_MODE 0x08
215
216/* for operation_mode */
217#define IEEE80211_HT_OP_MODE_PROTECTION 0x0003
218#define IEEE80211_HT_OP_MODE_PROTECTION_NONE 0
219#define IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER 1
220#define IEEE80211_HT_OP_MODE_PROTECTION_20MHZ 2
221#define IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED 3
222#define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT 0x0004
223#define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT 0x0010
224#define IEEE80211_HT_OP_MODE_CCFS2_SHIFT 5
225#define IEEE80211_HT_OP_MODE_CCFS2_MASK 0x1fe0
226
227/* for stbc_param */
228#define IEEE80211_HT_STBC_PARAM_DUAL_BEACON 0x0040
229#define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT 0x0080
230#define IEEE80211_HT_STBC_PARAM_STBC_BEACON 0x0100
231#define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT 0x0200
232#define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE 0x0400
233#define IEEE80211_HT_STBC_PARAM_PCO_PHASE 0x0800
234
235
236/* block-ack parameters */
237#define IEEE80211_ADDBA_PARAM_AMSDU_MASK 0x0001
238#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
239#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
240#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFC0
241#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
242#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
243
244/*
245 * A-MPDU buffer sizes
246 * According to HT size varies from 8 to 64 frames
247 * HE adds the ability to have up to 256 frames.
248 * EHT adds the ability to have up to 1K frames.
249 */
250#define IEEE80211_MIN_AMPDU_BUF 0x8
251#define IEEE80211_MAX_AMPDU_BUF_HT 0x40
252#define IEEE80211_MAX_AMPDU_BUF_HE 0x100
253#define IEEE80211_MAX_AMPDU_BUF_EHT 0x400
254
255
256/* Spatial Multiplexing Power Save Modes (for capability) */
257#define WLAN_HT_CAP_SM_PS_STATIC 0
258#define WLAN_HT_CAP_SM_PS_DYNAMIC 1
259#define WLAN_HT_CAP_SM_PS_INVALID 2
260#define WLAN_HT_CAP_SM_PS_DISABLED 3
261
262/* for SM power control field lower two bits */
263#define WLAN_HT_SMPS_CONTROL_DISABLED 0
264#define WLAN_HT_SMPS_CONTROL_STATIC 1
265#define WLAN_HT_SMPS_CONTROL_DYNAMIC 3
266
267/* HT action codes */
268enum ieee80211_ht_actioncode {
269 WLAN_HT_ACTION_NOTIFY_CHANWIDTH = 0,
270 WLAN_HT_ACTION_SMPS = 1,
271 WLAN_HT_ACTION_PSMP = 2,
272 WLAN_HT_ACTION_PCO_PHASE = 3,
273 WLAN_HT_ACTION_CSI = 4,
274 WLAN_HT_ACTION_NONCOMPRESSED_BF = 5,
275 WLAN_HT_ACTION_COMPRESSED_BF = 6,
276 WLAN_HT_ACTION_ASEL_IDX_FEEDBACK = 7,
277};
278
279/* BACK action code */
280enum ieee80211_back_actioncode {
281 WLAN_ACTION_ADDBA_REQ = 0,
282 WLAN_ACTION_ADDBA_RESP = 1,
283 WLAN_ACTION_DELBA = 2,
284};
285
286/* BACK (block-ack) parties */
287enum ieee80211_back_parties {
288 WLAN_BACK_RECIPIENT = 0,
289 WLAN_BACK_INITIATOR = 1,
290};
291
292#endif /* LINUX_IEEE80211_HT_H */