iwlwifi: mvm: add support for oce

Add support for Optimized Connectivity Experience (OCE).  Get
capabilities from the fw, expose them with nl80211, and enable them in
UMAC scan if the relevant nl80211 flags are set by the userspace.

Signed-off-by: Roee Zamir <[email protected]>
Signed-off-by: Luca Coelho <[email protected]>

Author: Zamir, Roee

drivers/net/wireless/intel/iwlwifi/fw/api/scan.h

@@ -579,8 +579,14 @@ enum iwl_umac_scan_general_flags {
 	IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED		= BIT(8),
 	IWL_UMAC_SCAN_GEN_FLAGS_MATCH			= BIT(9),
 	IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL		= BIT(10),
+	/* Extended dwell is obselete when adaptive dwell is used, making this
+	 * bit reusable. Hence, probe request defer is used only when adaptive
+	 * dwell is supported. */
+	IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP	= BIT(10),
 	IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED	= BIT(11),
 	IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL		= BIT(13),
+	IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME		= BIT(14),
+	IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE	= BIT(15),
 };
 
 /**

drivers/net/wireless/intel/iwlwifi/fw/file.h

@@ -265,6 +265,7 @@ enum iwl_ucode_tlv_api {
 	IWL_UCODE_TLV_API_NAN2_VER2		= (__force iwl_ucode_tlv_api_t)31,
 	/* API Set 1 */
 	IWL_UCODE_TLV_API_ADAPTIVE_DWELL	= (__force iwl_ucode_tlv_api_t)32,
+	IWL_UCODE_TLV_API_OCE			= (__force iwl_ucode_tlv_api_t)33,
 	IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE	= (__force iwl_ucode_tlv_api_t)34,
 	IWL_UCODE_TLV_API_NEW_RX_STATS		= (__force iwl_ucode_tlv_api_t)35,
 	IWL_UCODE_TLV_API_QUOTA_LOW_LATENCY	= (__force iwl_ucode_tlv_api_t)38,

drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

@@ -661,6 +661,17 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 				      NL80211_EXT_FEATURE_SET_SCAN_DWELL);
 	}
 
+	if (iwl_mvm_is_oce_supported(mvm)) {
+		wiphy_ext_feature_set(hw->wiphy,
+			NL80211_EXT_FEATURE_ACCEPT_BCAST_PROBE_RESP);
+		wiphy_ext_feature_set(hw->wiphy,
+			NL80211_EXT_FEATURE_FILS_MAX_CHANNEL_TIME);
+		wiphy_ext_feature_set(hw->wiphy,
+			NL80211_EXT_FEATURE_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION);
+		wiphy_ext_feature_set(hw->wiphy,
+			NL80211_EXT_FEATURE_OCE_PROBE_REQ_HIGH_TX_RATE);
+	}
+
 	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 
 #ifdef CONFIG_PM_SLEEP

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -1155,6 +1155,12 @@ static inline bool iwl_mvm_is_adaptive_dwell_supported(struct iwl_mvm *mvm)
 			  IWL_UCODE_TLV_API_ADAPTIVE_DWELL);
 }
 
+static inline bool iwl_mvm_is_oce_supported(struct iwl_mvm *mvm)
+{
+	/* OCE should never be enabled for LMAC scan FWs */
+	return fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_OCE);
+}
+
 static inline bool iwl_mvm_enter_d0i3_on_suspend(struct iwl_mvm *mvm)
 {
 	/* For now we only use this mode to differentiate between

drivers/net/wireless/intel/iwlwifi/mvm/scan.c

@@ -1268,9 +1268,28 @@ static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
 	 */
 	if (iwl_mvm_is_regular_scan(params) &&
 	    vif->type != NL80211_IFTYPE_P2P_DEVICE &&
-	    params->type != IWL_SCAN_TYPE_FRAGMENTED)
+	    params->type != IWL_SCAN_TYPE_FRAGMENTED &&
+	    !iwl_mvm_is_adaptive_dwell_supported(mvm) &&
+	    !iwl_mvm_is_oce_supported(mvm))
 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
 
+	if (iwl_mvm_is_oce_supported(mvm)) {
+		if ((params->flags &
+		     NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
+			flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
+		/* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
+		 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
+		 * the same bit, we need to make sure that we use this bit here
+		 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
+		 * used. */
+		if ((params->flags &
+		     NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
+		     !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
+			flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
+		if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
+			flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
+	}
+
 	return flags;
 }