1ENUM IEEE80211_HW_FL(9) The basic mac80211 driver inte ENUM IEEE80211_HW_FL(9)
2
6 enum_ieee80211_hw_flags - hardware flags
7
9 enum ieee80211_hw_flags {
10 IEEE80211_HW_HAS_RATE_CONTROL,
11 IEEE80211_HW_RX_INCLUDES_FCS,
12 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING,
13 IEEE80211_HW_SIGNAL_UNSPEC,
14 IEEE80211_HW_SIGNAL_DBM,
15 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC,
16 IEEE80211_HW_SPECTRUM_MGMT,
17 IEEE80211_HW_AMPDU_AGGREGATION,
18 IEEE80211_HW_SUPPORTS_PS,
19 IEEE80211_HW_PS_NULLFUNC_STACK,
20 IEEE80211_HW_SUPPORTS_DYNAMIC_PS,
21 IEEE80211_HW_MFP_CAPABLE,
22 IEEE80211_HW_WANT_MONITOR_VIF,
23 IEEE80211_HW_NO_AUTO_VIF,
24 IEEE80211_HW_SW_CRYPTO_CONTROL,
25 IEEE80211_HW_SUPPORT_FAST_XMIT,
26 IEEE80211_HW_REPORTS_TX_ACK_STATUS,
27 IEEE80211_HW_CONNECTION_MONITOR,
28 IEEE80211_HW_QUEUE_CONTROL,
29 IEEE80211_HW_SUPPORTS_PER_STA_GTK,
30 IEEE80211_HW_AP_LINK_PS,
31 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW,
32 IEEE80211_HW_SUPPORTS_RC_TABLE,
33 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF,
34 IEEE80211_HW_TIMING_BEACON_ONLY,
35 IEEE80211_HW_SUPPORTS_HT_CCK_RATES,
36 IEEE80211_HW_CHANCTX_STA_CSA,
37 IEEE80211_HW_SUPPORTS_CLONED_SKBS,
38 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS,
39 IEEE80211_HW_TDLS_WIDER_BW,
40 NUM_IEEE80211_HW_FLAGS
41 };
42
44 IEEE80211_HW_HAS_RATE_CONTROL
45 The hardware or firmware includes rate control, and cannot be
46 controlled by the stack. As such, no rate control algorithm should
47 be instantiated, and the TX rate reported to userspace will be
48 taken from the TX status instead of the rate control algorithm.
49 Note that this requires that the driver implement a number of
50 callbacks so it has the correct information, it needs to have the
51 set_rts_threshold callback and must look at the BSS config
52 use_cts_prot for G/N protection, use_short_slot for slot timing in
53 2.4 GHz and use_short_preamble for preambles for CCK frames.
54 IEEE80211_HW_RX_INCLUDES_FCS
56 Indicates that received frames passed to the stack include the FCS
57 at the end.
58 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
60 Some wireless LAN chipsets buffer broadcast/multicast frames for
61 power saving stations in the hardware/firmware and others rely on
62 the host system for such buffering. This option is used to
63 configure the IEEE 802.11 upper layer to buffer broadcast and
64 multicast frames when there are power saving stations so that the
65 driver can fetch them with ieee80211_get_buffered_bc.
66 IEEE80211_HW_SIGNAL_UNSPEC
68 Hardware can provide signal values but we don´t know its units. We
69 expect values between 0 and max_signal. If possible please provide
70 dB or dBm instead.
71 IEEE80211_HW_SIGNAL_DBM
73 Hardware gives signal values in dBm, decibel difference from one
74 milliwatt. This is the preferred method since it is standardized
75 between different devices. max_signal does not need to be set.
76 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
78 This device needs to get data from beacon before association (i.e.
79 dtim_period).
80 IEEE80211_HW_SPECTRUM_MGMT
82 Hardware supports spectrum management defined in 802.11h
83 Measurement, Channel Switch, Quieting, TPC
84 IEEE80211_HW_AMPDU_AGGREGATION
86 Hardware supports 11n A-MPDU aggregation.
87 IEEE80211_HW_SUPPORTS_PS
89 Hardware has power save support (i.e. can go to sleep).
90 IEEE80211_HW_PS_NULLFUNC_STACK
92 Hardware requires nullfunc frame handling in stack, implies stack
93 support for dynamic PS.
94 IEEE80211_HW_SUPPORTS_DYNAMIC_PS
96 Hardware has support for dynamic PS.
97 IEEE80211_HW_MFP_CAPABLE
99 Hardware supports management frame protection (MFP, IEEE 802.11w).
100 IEEE80211_HW_WANT_MONITOR_VIF
102 The driver would like to be informed of a virtual monitor interface
103 when monitor interfaces are the only active interfaces.
104 IEEE80211_HW_NO_AUTO_VIF
106 The driver would like for no wlanX to be created. It is expected
107 user-space will create vifs as desired (and thus have them named as
108 desired).
109 IEEE80211_HW_SW_CRYPTO_CONTROL
111 The driver wants to control which of the crypto algorithms can be
112 done in software - so don´t automatically try to fall back to it if
113 hardware crypto fails, but do so only if the driver returns 1. This
114 also forces the driver to advertise its supported cipher suites.
115 IEEE80211_HW_SUPPORT_FAST_XMIT
117 The driver/hardware supports fast-xmit, this currently requires
118 only the ability to calculate the duration for frames.
119 IEEE80211_HW_REPORTS_TX_ACK_STATUS
121 Hardware can provide ack status reports of Tx frames to the stack.
122 IEEE80211_HW_CONNECTION_MONITOR
124 The hardware performs its own connection monitoring, including
125 periodic keep-alives to the AP and probing the AP on beacon loss.
126 IEEE80211_HW_QUEUE_CONTROL
128 The driver wants to control per-interface queue mapping in order to
129 use different queues (not just one per AC) for different virtual
130 interfaces. See the doc section on HW queue control for more
131 details.
132 IEEE80211_HW_SUPPORTS_PER_STA_GTK
134 The device´s crypto engine supports per-station GTKs as used by
135 IBSS RSN or during fast transition. If the device doesn´t support
136 per-station GTKs, but can be asked not to decrypt group addressed
137 frames, then IBSS RSN support is still possible but software crypto
138 will be used. Advertise the wiphy flag only in that case.
139 IEEE80211_HW_AP_LINK_PS
141 When operating in AP mode the device autonomously manages the PS
142 status of connected stations. When this flag is set mac80211 will
143 not trigger PS mode for connected stations based on the PM bit of
144 incoming frames. Use ieee80211_start_ps/ieee8021_end_ps to manually
145 configure the PS mode of connected stations.
146 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
148 The device handles TX A-MPDU session setup strictly in HW. mac80211
149 should not attempt to do this in software.
150 IEEE80211_HW_SUPPORTS_RC_TABLE
152 The driver supports using a rate selection table provided by the
153 rate control algorithm.
154 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
156 Use the P2P Device address for any P2P Interface. This will be
157 honoured even if more than one interface is supported.
158 IEEE80211_HW_TIMING_BEACON_ONLY
160 Use sync timing from beacon frames only, to allow getting TBTT of a
161 DTIM beacon.
162 IEEE80211_HW_SUPPORTS_HT_CCK_RATES
164 Hardware supports mixing HT/CCK rates and can cope with CCK rates
165 in an aggregation session (e.g. by not using aggregation for such
166 frames.)
167 IEEE80211_HW_CHANCTX_STA_CSA
169 Support 802.11h based channel-switch (CSA) for a single active
170 channel while using channel contexts. When support is not enabled
171 the default action is to disconnect when getting the CSA frame.
172 IEEE80211_HW_SUPPORTS_CLONED_SKBS
174 The driver will never modify the payload or tailroom of TX skbs
175 without copying them first.
176 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS
178 The HW supports scanning on all bands in one command, mac80211
179 doesn´t have to run separate scans per band.
180 IEEE80211_HW_TDLS_WIDER_BW
182 The device/driver supports wider bandwidth than then BSS bandwidth
183 for a TDLS link on the base channel.
184 NUM_IEEE80211_HW_FLAGS
186 number of hardware flags, used for sizing arrays
187
189 These flags are used to indicate hardware capabilities to the stack.
190 Generally, flags here should have their meaning done in a way that the
191 simplest hardware doesn´t need setting any particular flags. There are
192 some exceptions to this rule, however, so you are advised to review
193 these flags carefully.
194
196 Johannes Berg <johannes@sipsolutions.net>
197 Author.
198
200Kernel Hackers Manual 2.6. June 2019 ENUM IEEE80211_HW_FL(9)