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| author | Andrew Zaborowski <andrew.zaborowski@intel.com> | 2017-02-10 12:02:31 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2017-03-06 11:21:38 +0300 |
| commit | 4a4b8169501b18c3450ac735a7e277b24886a651 (patch) | |
| tree | 0d2f2eadbb3894c25642935db9c497ae0a3ec377 /include/uapi/linux/nl80211.h | |
| parent | 3eb0928fc3e4b4702462164b399acddb7f0f09fd (diff) | |
| download | linux-4a4b8169501b18c3450ac735a7e277b24886a651.tar.xz | |
cfg80211: Accept multiple RSSI thresholds for CQM
Change the SET CQM command's RSSI threshold attribute to accept any
number of thresholds as a sorted array. The API should be backwards
compatible so that if one s32 threshold value is passed, the old
mechanism is enabled. The netlink event generated is the same in both
cases.
cfg80211 handles an arbitrary number of RSSI thresholds but drivers have
to provide a method (set_cqm_rssi_range_config) that configures a range
set by a high and a low value. Drivers have to call back when the RSSI
goes out of that range and there's no additional event for each time the
range is reconfigured as there was with the current one-threshold API.
This method doesn't have a hysteresis parameter because there's no
benefit to the cfg80211 code from having the hysteresis be handled by
hardware/driver in terms of the number of wakeups. At the same time
it would likely be less consistent between drivers if offloaded or
done in the drivers.
Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/uapi/linux/nl80211.h')
| -rw-r--r-- | include/uapi/linux/nl80211.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 5ed257c4cd4e..9a499b15cfbc 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -3942,7 +3942,10 @@ enum nl80211_ps_state { * @__NL80211_ATTR_CQM_INVALID: invalid * @NL80211_ATTR_CQM_RSSI_THOLD: RSSI threshold in dBm. This value specifies * the threshold for the RSSI level at which an event will be sent. Zero - * to disable. + * to disable. Alternatively, if %NL80211_EXT_FEATURE_CQM_RSSI_LIST is + * set, multiple values can be supplied as a low-to-high sorted array of + * threshold values in dBm. Events will be sent when the RSSI value + * crosses any of the thresholds. * @NL80211_ATTR_CQM_RSSI_HYST: RSSI hysteresis in dBm. This value specifies * the minimum amount the RSSI level must change after an event before a * new event may be issued (to reduce effects of RSSI oscillation). @@ -4753,6 +4756,9 @@ enum nl80211_feature_flags { * @NL80211_EXT_FEATURE_SCHED_SCAN_RELATIVE_RSSI: The driver supports sched_scan * for reporting BSSs with better RSSI than the current connected BSS * (%NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI). + * @NL80211_EXT_FEATURE_CQM_RSSI_LIST: With this driver the + * %NL80211_ATTR_CQM_RSSI_THOLD attribute accepts a list of zero or more + * RSSI threshold values to monitor rather than exactly one threshold. * * @NUM_NL80211_EXT_FEATURES: number of extended features. * @MAX_NL80211_EXT_FEATURES: highest extended feature index. @@ -4771,6 +4777,7 @@ enum nl80211_ext_feature_index { NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA, NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED, NL80211_EXT_FEATURE_SCHED_SCAN_RELATIVE_RSSI, + NL80211_EXT_FEATURE_CQM_RSSI_LIST, /* add new features before the definition below */ NUM_NL80211_EXT_FEATURES, |