From:   gregory.greenman@intel.com
To:     johannes@sipsolutions.net
Cc:     linux-wireless@vger.kernel.org,
        Krishnanand Prabhu <krishnanand.prabhu@intel.com>,
        Gregory Greenman <gregory.greenman@intel.com>
Subject: [PATCH 04/18] wifi: iwlwifi: mvm: add support for timing measurement
Date:   Mon, 20 Mar 2023 12:33:05 +0200
Message-Id: <20230320122330.001d2b459ece.I15ab8fc214edc35f1f362006a9e1a22b89e7ed8e@changeid>
In-Reply-To: <20230320103319.1309442-1-gregory.greenman@intel.com>
References: <20230320103319.1309442-1-gregory.greenman@intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Krishnanand Prabhu <krishnanand.prabhu@intel.com>

Add support for timing measurement in extended capabilities, used for
time synchronization.

Signed-off-by: Krishnanand Prabhu <krishnanand.prabhu@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
---
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 44 +++++++++++++++++--
 1 file changed, 41 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 93ca92e8eb98..7ee8d24606a2 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -222,19 +222,39 @@ int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 	return ret;
 }
 
+/* Each capability added here should also be add to tm_if_types_ext_capa_sta */
 static const u8 he_if_types_ext_capa_sta[] = {
 	 [0] = WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING,
 	 [2] = WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT,
 	 [7] = WLAN_EXT_CAPA8_OPMODE_NOTIF,
 };
 
-static const struct wiphy_iftype_ext_capab he_iftypes_ext_capa[] = {
+static const u8 tm_if_types_ext_capa_sta[] = {
+	 [0] = WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING,
+	 [2] = WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT |
+	       WLAN_EXT_CAPA3_TIMING_MEASUREMENT_SUPPORT,
+	 [7] = WLAN_EXT_CAPA8_OPMODE_NOTIF,
+	 [9] = WLAN_EXT_CAPA10_TWT_REQUESTER_SUPPORT,
+};
+
+/* Additional interface types for which extended capabilities are
+ * specified separately
+ */
+static const struct wiphy_iftype_ext_capab add_iftypes_ext_capa[] = {
 	{
 		.iftype = NL80211_IFTYPE_STATION,
 		.extended_capabilities = he_if_types_ext_capa_sta,
 		.extended_capabilities_mask = he_if_types_ext_capa_sta,
 		.extended_capabilities_len = sizeof(he_if_types_ext_capa_sta),
 	},
+	{
+		.iftype = NL80211_IFTYPE_STATION,
+		.extended_capabilities = tm_if_types_ext_capa_sta,
+		.extended_capabilities_mask = tm_if_types_ext_capa_sta,
+		.extended_capabilities_len = sizeof(tm_if_types_ext_capa_sta),
+		/* relevant only if EHT is supported */
+		.eml_capabilities = IEEE80211_EML_CAP_EMLSR_SUPP,
+	},
 };
 
 static int
@@ -562,16 +582,34 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 					      NL80211_EXT_FEATURE_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION);
 	}
 
+	hw->wiphy->iftype_ext_capab = NULL;
+	hw->wiphy->num_iftype_ext_capab = 0;
+
 	if (mvm->nvm_data->sku_cap_11ax_enable &&
 	    !iwlwifi_mod_params.disable_11ax) {
-		hw->wiphy->iftype_ext_capab = he_iftypes_ext_capa;
+		hw->wiphy->iftype_ext_capab = add_iftypes_ext_capa;
 		hw->wiphy->num_iftype_ext_capab =
-			ARRAY_SIZE(he_iftypes_ext_capa);
+			ARRAY_SIZE(add_iftypes_ext_capa) - 1;
 
 		ieee80211_hw_set(hw, SUPPORTS_MULTI_BSSID);
 		ieee80211_hw_set(hw, SUPPORTS_ONLY_HE_MULTI_BSSID);
 	}
 
+	if (iwl_fw_lookup_cmd_ver(mvm->fw,
+				  WIDE_ID(DATA_PATH_GROUP,
+					  WNM_80211V_TIMING_MEASUREMENT_CONFIG_CMD),
+				  IWL_FW_CMD_VER_UNKNOWN) >= 1) {
+		IWL_DEBUG_INFO(mvm->trans, "Timing measurement supported\n");
+
+		if (!hw->wiphy->iftype_ext_capab) {
+			hw->wiphy->num_iftype_ext_capab = 1;
+			hw->wiphy->iftype_ext_capab = add_iftypes_ext_capa +
+				ARRAY_SIZE(add_iftypes_ext_capa) - 1;
+		} else {
+			hw->wiphy->iftype_ext_capab = add_iftypes_ext_capa + 1;
+		}
+	}
+
 	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 
 #ifdef CONFIG_PM_SLEEP
-- 
2.38.1