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nl80211: add feature for BSS selection support

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Introducing a new feature that the driver can use to
indicate the driver/firmware supports configuration of BSS
selection criteria upon CONNECT command. This can be useful
when multiple BSS-es are found belonging to the same ESS,
ie. Infra-BSS with same SSID. The criteria can then be used to
offload selection of a preferred BSS.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Lei Zhang <leizh@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
[move wiphy support check into parse_bss_select()]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arend van Spriel
2016-03-02 20:37:18 +01:00
committed by Johannes Berg
parent f59374eb42
commit 38de03d2a2
4 changed files with 204 additions and 0 deletions
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34
include/net/cfg80211.h
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@@ -1858,6 +1858,33 @@ 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 ieee80211_band band;
s8 delta;
};
/**
* struct cfg80211_bss_selection - connection parameters for BSS selection.
*
* @behaviour: requested BSS selection behaviour.
* @param: parameters for requestion behaviour.
* @band_pref: preferred band for %NL80211_BSS_SELECT_ATTR_BAND_PREF.
* @adjust: parameters for %NL80211_BSS_SELECT_ATTR_RSSI_ADJUST.
*/
struct cfg80211_bss_selection {
enum nl80211_bss_select_attr behaviour;
union {
enum ieee80211_band band_pref;
struct cfg80211_bss_select_adjust adjust;
} param;
};
/**
* struct cfg80211_connect_params - Connection parameters
*
@@ -1895,6 +1922,7 @@ struct cfg80211_ibss_params {
* @vht_capa_mask: The bits of vht_capa which are to be used.
* @pbss: if set, connect to a PCP instead of AP. Valid for DMG
* networks.
* @bss_select: criteria to be used for BSS selection.
*/
struct cfg80211_connect_params {
struct ieee80211_channel *channel;
@@ -1918,6 +1946,7 @@ struct cfg80211_connect_params {
struct ieee80211_vht_cap vht_capa;
struct ieee80211_vht_cap vht_capa_mask;
bool pbss;
struct cfg80211_bss_selection bss_select;
};
/**
@@ -3186,6 +3215,9 @@ struct wiphy_vendor_command {
* low rssi when a frame is heard on different channel, then it should set
* this variable to the maximal offset for which it can compensate.
* This value should be set in MHz.
* @bss_select_support: bitmask indicating the BSS selection criteria supported
* by the driver in the .connect() callback. The bit position maps to the
* attribute indices defined in &enum nl80211_bss_select_attr.
*/
struct wiphy {
/* assign these fields before you register the wiphy */
@@ -3308,6 +3340,8 @@ struct wiphy {
u8 max_num_csa_counters;
u8 max_adj_channel_rssi_comp;
u32 bss_select_support;
char priv[0] __aligned(NETDEV_ALIGN);
};