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 IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU,
41 IEEE80211_HW_BEACON_TX_STATUS,
42 IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR,
43 IEEE80211_HW_SUPPORTS_REORDERING_BUFFER,
44 IEEE80211_HW_USES_RSS,
45 IEEE80211_HW_TX_AMSDU,
46 IEEE80211_HW_TX_FRAG_LIST,
47 IEEE80211_HW_REPORTS_LOW_ACK,
48 IEEE80211_HW_SUPPORTS_TX_FRAG,
49 NUM_IEEE80211_HW_FLAGS
50 };
51
53 IEEE80211_HW_HAS_RATE_CONTROL
54 The hardware or firmware includes rate control, and cannot be
55 controlled by the stack. As such, no rate control algorithm should
56 be instantiated, and the TX rate reported to userspace will be
57 taken from the TX status instead of the rate control algorithm.
58 Note that this requires that the driver implement a number of
59 callbacks so it has the correct information, it needs to have the
60 set_rts_threshold callback and must look at the BSS config
61 use_cts_prot for G/N protection, use_short_slot for slot timing in
62 2.4 GHz and use_short_preamble for preambles for CCK frames.
63 IEEE80211_HW_RX_INCLUDES_FCS
65 Indicates that received frames passed to the stack include the FCS
66 at the end.
67 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
69 Some wireless LAN chipsets buffer broadcast/multicast frames for
70 power saving stations in the hardware/firmware and others rely on
71 the host system for such buffering. This option is used to
72 configure the IEEE 802.11 upper layer to buffer broadcast and
73 multicast frames when there are power saving stations so that the
74 driver can fetch them with ieee80211_get_buffered_bc.
75 IEEE80211_HW_SIGNAL_UNSPEC
77 Hardware can provide signal values but we don't know its units. We
78 expect values between 0 and max_signal. If possible please provide
79 dB or dBm instead.
80 IEEE80211_HW_SIGNAL_DBM
82 Hardware gives signal values in dBm, decibel difference from one
83 milliwatt. This is the preferred method since it is standardized
84 between different devices. max_signal does not need to be set.
85 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
87 This device needs to get data from beacon before association (i.e.
88 dtim_period).
89 IEEE80211_HW_SPECTRUM_MGMT
91 Hardware supports spectrum management defined in 802.11h
92 Measurement, Channel Switch, Quieting, TPC
93 IEEE80211_HW_AMPDU_AGGREGATION
95 Hardware supports 11n A-MPDU aggregation.
96 IEEE80211_HW_SUPPORTS_PS
98 Hardware has power save support (i.e. can go to sleep).
99 IEEE80211_HW_PS_NULLFUNC_STACK
101 Hardware requires nullfunc frame handling in stack, implies stack
102 support for dynamic PS.
103 IEEE80211_HW_SUPPORTS_DYNAMIC_PS
105 Hardware has support for dynamic PS.
106 IEEE80211_HW_MFP_CAPABLE
108 Hardware supports management frame protection (MFP, IEEE 802.11w).
109 IEEE80211_HW_WANT_MONITOR_VIF
111 The driver would like to be informed of a virtual monitor interface
112 when monitor interfaces are the only active interfaces.
113 IEEE80211_HW_NO_AUTO_VIF
115 The driver would like for no wlanX to be created. It is expected
116 user-space will create vifs as desired (and thus have them named as
117 desired).
118 IEEE80211_HW_SW_CRYPTO_CONTROL
120 The driver wants to control which of the crypto algorithms can be
121 done in software - so don't automatically try to fall back to it if
122 hardware crypto fails, but do so only if the driver returns 1. This
123 also forces the driver to advertise its supported cipher suites.
124 IEEE80211_HW_SUPPORT_FAST_XMIT
126 The driver/hardware supports fast-xmit, this currently requires
127 only the ability to calculate the duration for frames.
128 IEEE80211_HW_REPORTS_TX_ACK_STATUS
130 Hardware can provide ack status reports of Tx frames to the stack.
131 IEEE80211_HW_CONNECTION_MONITOR
133 The hardware performs its own connection monitoring, including
134 periodic keep-alives to the AP and probing the AP on beacon loss.
135 IEEE80211_HW_QUEUE_CONTROL
137 The driver wants to control per-interface queue mapping in order to
138 use different queues (not just one per AC) for different virtual
139 interfaces. See the doc section on HW queue control for more
140 details.
141 IEEE80211_HW_SUPPORTS_PER_STA_GTK
143 The device's crypto engine supports per-station GTKs as used by
144 IBSS RSN or during fast transition. If the device doesn't support
145 per-station GTKs, but can be asked not to decrypt group addressed
146 frames, then IBSS RSN support is still possible but software crypto
147 will be used. Advertise the wiphy flag only in that case.
148 IEEE80211_HW_AP_LINK_PS
150 When operating in AP mode the device autonomously manages the PS
151 status of connected stations. When this flag is set mac80211 will
152 not trigger PS mode for connected stations based on the PM bit of
153 incoming frames. Use ieee80211_start_ps/ieee8021_end_ps to manually
154 configure the PS mode of connected stations.
155 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
157 The device handles TX A-MPDU session setup strictly in HW. mac80211
158 should not attempt to do this in software.
159 IEEE80211_HW_SUPPORTS_RC_TABLE
161 The driver supports using a rate selection table provided by the
162 rate control algorithm.
163 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
165 Use the P2P Device address for any P2P Interface. This will be
166 honoured even if more than one interface is supported.
167 IEEE80211_HW_TIMING_BEACON_ONLY
169 Use sync timing from beacon frames only, to allow getting TBTT of a
170 DTIM beacon.
171 IEEE80211_HW_SUPPORTS_HT_CCK_RATES
173 Hardware supports mixing HT/CCK rates and can cope with CCK rates
174 in an aggregation session (e.g. by not using aggregation for such
175 frames.)
176 IEEE80211_HW_CHANCTX_STA_CSA
178 Support 802.11h based channel-switch (CSA) for a single active
179 channel while using channel contexts. When support is not enabled
180 the default action is to disconnect when getting the CSA frame.
181 IEEE80211_HW_SUPPORTS_CLONED_SKBS
183 The driver will never modify the payload or tailroom of TX skbs
184 without copying them first.
185 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS
187 The HW supports scanning on all bands in one command, mac80211
188 doesn't have to run separate scans per band.
189 IEEE80211_HW_TDLS_WIDER_BW
191 The device/driver supports wider bandwidth than then BSS bandwidth
192 for a TDLS link on the base channel.
193 IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU
195 The driver supports receiving A-MSDUs within A-MPDU.
196 IEEE80211_HW_BEACON_TX_STATUS
198 The device/driver provides TX status for sent beacons.
199 IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR
201 Hardware (or driver) requires that each station has a unique
202 address, i.e. each station entry can be identified by just its MAC
203 address; this prevents, for example, the same station from
204 connecting to two virtual AP interfaces at the same time.
205 IEEE80211_HW_SUPPORTS_REORDERING_BUFFER
207 Hardware (or driver) manages the reordering buffer internally,
208 guaranteeing mac80211 receives frames in order and does not need to
209 manage its own reorder buffer or BA session timeout.
210 IEEE80211_HW_USES_RSS
212 The device uses RSS and thus requires parallel RX, which implies
213 using per-CPU station statistics.
214 IEEE80211_HW_TX_AMSDU
216 Hardware (or driver) supports software aggregated A-MSDU frames.
217 Requires software tx queueing and fast-xmit support. When not using
218 minstrel/minstrel_ht rate control, the driver must limit the
219 maximum A-MSDU size based on the current tx rate by setting
220 max_rc_amsdu_len in struct ieee80211_sta.
221 IEEE80211_HW_TX_FRAG_LIST
223 Hardware (or driver) supports sending frag_list skbs, needed for
224 zero-copy software A-MSDU.
225 IEEE80211_HW_REPORTS_LOW_ACK
227 The driver (or firmware) reports low ack event by
228 ieee80211_report_low_ack based on its own algorithm. For such
229 drivers, mac80211 packet loss mechanism will not be triggered and
230 driver is completely depending on firmware event for station
231 kickout.
232 IEEE80211_HW_SUPPORTS_TX_FRAG
234 Hardware does fragmentation by itself. The stack will not do
235 fragmentation. The callback for set_frag_threshold should be set as
236 well.
237 NUM_IEEE80211_HW_FLAGS
239 number of hardware flags, used for sizing arrays
240
242 These flags are used to indicate hardware capabilities to the stack.
243 Generally, flags here should have their meaning done in a way that the
244 simplest hardware doesn't need setting any particular flags. There are
245 some exceptions to this rule, however, so you are advised to review
246 these flags carefully.
247
249 Johannes Berg <johannes@sipsolutions.net>
250 Author.
251
253Kernel Hackers Manual 3.10 June 2019 ENUM IEEE80211_HW_FL(9)