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cfg80211/nl80211: add DFS offload flag

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Add wiphy EXT_FEATURE flag to indicate that HW or driver does
all DFS actions by itself.
User-space functionality already implemented in hostapd using
vendor-specific (QCA) OUI to advertise DFS offload support.
Need to introduce generic flag to inform about DFS offload support.
For devices with DFS_OFFLOAD flag set user-space will no longer
need to issue CAC or do any actions in response to
"radar detected" events. HW will do everything by itself and send
events to user-space to indicate that CAC was started/finished, etc.

Signed-off-by: Dmitrii Lebed <dlebed@quantenna.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Dmitry Lebed
2018-03-01 12:39:15 +03:00
committed by Johannes Berg
parent 2cb021f5de
commit 13cf6dec93
2 changed files with 15 additions and 4 deletions
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7
include/uapi/linux/nl80211.h
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@@ -4999,6 +4999,12 @@ enum nl80211_feature_flags {
* @NL80211_EXT_FEATURE_LOW_SPAN_SCAN: Driver supports low span scan.
* @NL80211_EXT_FEATURE_LOW_POWER_SCAN: Driver supports low power scan.
* @NL80211_EXT_FEATURE_HIGH_ACCURACY_SCAN: Driver supports high accuracy scan.
* @NL80211_EXT_FEATURE_DFS_OFFLOAD: HW/driver will offload DFS actions.
* Device or driver will do all DFS-related actions by itself,
* informing user-space about CAC progress, radar detection event,
* channel change triggered by radar detection event.
* No need to start CAC from user-space, no need to react to
* "radar detected" event.
*
* @NUM_NL80211_EXT_FEATURES: number of extended features.
* @MAX_NL80211_EXT_FEATURES: highest extended feature index.
@@ -5029,6 +5035,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_LOW_SPAN_SCAN,
NL80211_EXT_FEATURE_LOW_POWER_SCAN,
NL80211_EXT_FEATURE_HIGH_ACCURACY_SCAN,
NL80211_EXT_FEATURE_DFS_OFFLOAD,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,