carl9170: advertise interface combinations

In order to provide multiple interfaces for a single device,
the driver will be required to advertise all possible
interface configurations to the stack.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/carl9170/carl9170.h

@@ -286,6 +286,10 @@ struct ar9170 {
 		unsigned int tx_seq_table;
 	} fw;
 
+	/* interface configuration combinations */
+	struct ieee80211_iface_limit if_comb_limits[1];
+	struct ieee80211_iface_combination if_combs[1];
+
 	/* reset / stuck frames/queue detection */
 	struct work_struct restart_work;
 	struct work_struct ping_work;

drivers/net/wireless/ath/carl9170/fw.c

@@ -151,6 +151,7 @@ static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
 	const struct carl9170fw_chk_desc *chk_desc;
 	const struct carl9170fw_last_desc *last_desc;
 	const struct carl9170fw_txsq_desc *txsq_desc;
+	u16 if_comb_types;
 
 	last_desc = carl9170_fw_find_desc(ar, LAST_MAGIC,
 		sizeof(*last_desc), CARL9170FW_LAST_DESC_CUR_VER);
@@ -268,6 +269,9 @@ static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
 	if (SUPP(CARL9170FW_WOL))
 		device_set_wakeup_enable(&ar->udev->dev, true);
 
+	if_comb_types = BIT(NL80211_IFTYPE_STATION) |
+			BIT(NL80211_IFTYPE_P2P_CLIENT);
+
 	ar->fw.vif_num = otus_desc->vif_num;
 	ar->fw.cmd_bufs = otus_desc->cmd_bufs;
 	ar->fw.address = le32_to_cpu(otus_desc->fw_address);
@@ -294,12 +298,25 @@ static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len)
 		ar->hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_ADHOC);
 
 		if (SUPP(CARL9170FW_WLANTX_CAB)) {
-			ar->hw->wiphy->interface_modes |=
+			if_comb_types |=
 				BIT(NL80211_IFTYPE_AP) |
 				BIT(NL80211_IFTYPE_P2P_GO);
 		}
 	}
 
+	ar->if_comb_limits[0].max = ar->fw.vif_num;
+	ar->if_comb_limits[0].types = if_comb_types;
+
+	ar->if_combs[0].num_different_channels = 1;
+	ar->if_combs[0].max_interfaces = ar->fw.vif_num;
+	ar->if_combs[0].limits = ar->if_comb_limits;
+	ar->if_combs[0].n_limits = ARRAY_SIZE(ar->if_comb_limits);
+
+	ar->hw->wiphy->iface_combinations = ar->if_combs;
+	ar->hw->wiphy->n_iface_combinations = ARRAY_SIZE(ar->if_combs);
+
+	ar->hw->wiphy->interface_modes |= if_comb_types;
+
 	txsq_desc = carl9170_fw_find_desc(ar, TXSQ_MAGIC,
 		sizeof(*txsq_desc), CARL9170FW_TXSQ_DESC_CUR_VER);
 

drivers/net/wireless/ath/carl9170/main.c

@@ -1570,14 +1570,8 @@ void *carl9170_alloc(size_t priv_size)
 	INIT_LIST_HEAD(&ar->vif_list);
 	init_completion(&ar->tx_flush);
 
-	/*
-	 * Note:
-	 * IBSS/ADHOC and AP mode are only enabled, if the firmware
-	 * supports these modes. The code which will add the
-	 * additional interface_modes is in fw.c.
-	 */
-	hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
-				     BIT(NL80211_IFTYPE_P2P_CLIENT);
+	/* firmware decides which modes we support */
+	hw->wiphy->interface_modes = 0;
 
 	hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
 		     IEEE80211_HW_REPORTS_TX_ACK_STATUS |