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cfg80211: Add support to sched scan to report better BSSs

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Enhance sched scan to support option of finding a better BSS while in
connected state. Firmware scans the medium and reports when it finds a
known BSS which has better RSSI than the current connected BSS. New
attributes to specify the relative RSSI (compared to the current BSS)
are added to the sched scan to implement this.

Signed-off-by: vamsi krishna <vamsin@qti.qualcomm.com>
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
vamsi krishna
2017-01-13 01:12:20 +02:00
committed by Johannes Berg
parent ab5bb2d51b
commit bf95ecdba9
3 changed files with 99 additions and 11 deletions
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36
include/net/cfg80211.h
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@@ -1619,6 +1619,17 @@ struct cfg80211_sched_scan_plan {
u32 iterations;
};
/**
* struct cfg80211_bss_select_adjust - BSS selection with RSSI adjustment.
*
* @band: band of BSS which should match for RSSI level adjustment.
* @delta: value of RSSI level adjustment.
*/
struct cfg80211_bss_select_adjust {
enum nl80211_band band;
s8 delta;
};
/**
* struct cfg80211_sched_scan_request - scheduled scan request description
*
@@ -1654,6 +1665,16 @@ struct cfg80211_sched_scan_plan {
* cycle. The driver may ignore this parameter and start
* immediately (or at any other time), if this feature is not
* supported.
* @relative_rssi_set: Indicates whether @relative_rssi is set or not.
* @relative_rssi: Relative RSSI threshold in dB to restrict scan result
* reporting in connected state to cases where a matching BSS is determined
* to have better or slightly worse RSSI than the current connected BSS.
* The relative RSSI threshold values are ignored in disconnected state.
* @rssi_adjust: delta dB of RSSI preference to be given to the BSSs that belong
* to the specified band while deciding whether a better BSS is reported
* using @relative_rssi. If delta is a negative number, the BSSs that
* belong to the specified band will be penalized by delta dB in relative
* comparisions.
*/
struct cfg80211_sched_scan_request {
struct cfg80211_ssid *ssids;
@@ -1673,6 +1694,10 @@ struct cfg80211_sched_scan_request {
u8 mac_addr[ETH_ALEN] __aligned(2);
u8 mac_addr_mask[ETH_ALEN] __aligned(2);
bool relative_rssi_set;
s8 relative_rssi;
struct cfg80211_bss_select_adjust rssi_adjust;
/* internal */
struct wiphy *wiphy;
struct net_device *dev;
@@ -1980,17 +2005,6 @@ struct cfg80211_ibss_params {
struct ieee80211_ht_cap ht_capa_mask;
};
/**
* struct cfg80211_bss_select_adjust - BSS selection with RSSI adjustment.
*
* @band: band of BSS which should match for RSSI level adjustment.
* @delta: value of RSSI level adjustment.
*/
struct cfg80211_bss_select_adjust {
enum nl80211_band band;
s8 delta;
};
/**
* struct cfg80211_bss_selection - connection parameters for BSS selection.
*