wil6210: multiple VIFs support for start/stop AP

Add support for multiple VIFs in the cfg80211 operations start_ap,
stop_ap and change_beacon. This change allows starting multiple APs
using virtual interfaces.
The data path and most other operations are still working only
on the main interface.

Signed-off-by: Lior David <liord@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/wil6210/cfg80211.c

@@ -544,8 +544,9 @@ out:
 	return ERR_PTR(rc);
 }
 
-int wil_vif_prepare_stop(struct wil6210_priv *wil, struct wil6210_vif *vif)
+int wil_vif_prepare_stop(struct wil6210_vif *vif)
 {
+	struct wil6210_priv *wil = vif_to_wil(vif);
 	struct wireless_dev *wdev = vif_to_wdev(vif);
 	struct net_device *ndev;
 	int rc;
@@ -561,6 +562,7 @@ int wil_vif_prepare_stop(struct wil6210_priv *wil, struct wil6210_vif *vif)
 				 rc);
 			/* continue */
 		}
+		wil_bcast_fini(vif);
 		netif_carrier_off(ndev);
 	}
 
@@ -593,7 +595,7 @@ static int wil_cfg80211_del_iface(struct wiphy *wiphy,
 		return -EINVAL;
 	}
 
-	rc = wil_vif_prepare_stop(wil, vif);
+	rc = wil_vif_prepare_stop(vif);
 	if (rc)
 		goto out;
 
@@ -614,6 +616,7 @@ static int wil_cfg80211_change_iface(struct wiphy *wiphy,
 	struct wil6210_vif *vif = ndev_to_vif(ndev);
 	struct wireless_dev *wdev = vif_to_wdev(vif);
 	int rc;
+	bool fw_reset = false;
 
 	wil_dbg_misc(wil, "change_iface: type=%d\n", type);
 
@@ -628,7 +631,7 @@ static int wil_cfg80211_change_iface(struct wiphy *wiphy,
 	/* do not reset FW when there are active VIFs,
 	 * because it can cause significant disruption
 	 */
-	if (!wil_has_other_up_ifaces(wil, ndev) &&
+	if (!wil_has_other_active_ifaces(wil, ndev, true, false) &&
 	    netif_running(ndev) && !wil_is_recovery_blocked(wil)) {
 		wil_dbg_misc(wil, "interface is up. resetting...\n");
 		mutex_lock(&wil->mutex);
@@ -638,6 +641,7 @@ static int wil_cfg80211_change_iface(struct wiphy *wiphy,
 
 		if (rc)
 			return rc;
+		fw_reset = true;
 	}
 
 	switch (type) {
@@ -654,8 +658,9 @@ static int wil_cfg80211_change_iface(struct wiphy *wiphy,
 		return -EOPNOTSUPP;
 	}
 
-	if (vif->mid != 0 && wil_has_up_ifaces(wil)) {
-		wil_vif_prepare_stop(wil, vif);
+	if (vif->mid != 0 && wil_has_active_ifaces(wil, true, false)) {
+		if (!fw_reset)
+			wil_vif_prepare_stop(vif);
 		rc = wmi_port_delete(wil, vif->mid);
 		if (rc)
 			return rc;
@@ -1530,10 +1535,12 @@ static int _wil_cfg80211_start_ap(struct wiphy *wiphy,
 
 	mutex_lock(&wil->mutex);
 
-	__wil_down(wil);
-	rc = __wil_up(wil);
-	if (rc)
-		goto out;
+	if (!wil_has_other_active_ifaces(wil, ndev, true, false)) {
+		__wil_down(wil);
+		rc = __wil_up(wil);
+		if (rc)
+			goto out;
+	}
 
 	rc = wmi_set_ssid(vif, ssid_len, ssid);
 	if (rc)
@@ -1549,7 +1556,8 @@ static int _wil_cfg80211_start_ap(struct wiphy *wiphy,
 	vif->pbss = pbss;
 
 	netif_carrier_on(ndev);
-	wil6210_bus_request(wil, WIL_MAX_BUS_REQUEST_KBPS);
+	if (!wil_has_other_active_ifaces(wil, ndev, false, true))
+		wil6210_bus_request(wil, WIL_MAX_BUS_REQUEST_KBPS);
 
 	rc = wmi_pcp_start(vif, bi, wmi_nettype, chan, hidden_ssid, is_go);
 	if (rc)
@@ -1565,7 +1573,8 @@ err_bcast:
 	wmi_pcp_stop(vif);
 err_pcp_start:
 	netif_carrier_off(ndev);
-	wil6210_bus_request(wil, WIL_DEFAULT_BUS_REQUEST_KBPS);
+	if (!wil_has_other_active_ifaces(wil, ndev, false, true))
+		wil6210_bus_request(wil, WIL_DEFAULT_BUS_REQUEST_KBPS);
 out:
 	mutex_unlock(&wil->mutex);
 	return rc;
@@ -1670,20 +1679,26 @@ static int wil_cfg80211_stop_ap(struct wiphy *wiphy,
 {
 	struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 	struct wil6210_vif *vif = ndev_to_vif(ndev);
+	bool last;
 
-	wil_dbg_misc(wil, "stop_ap\n");
+	wil_dbg_misc(wil, "stop_ap, mid=%d\n", vif->mid);
 
 	netif_carrier_off(ndev);
-	wil6210_bus_request(wil, WIL_DEFAULT_BUS_REQUEST_KBPS);
-	wil_set_recovery_state(wil, fw_recovery_idle);
-
-	set_bit(wil_status_resetting, wil->status);
+	last = !wil_has_other_active_ifaces(wil, ndev, false, true);
+	if (last) {
+		wil6210_bus_request(wil, WIL_DEFAULT_BUS_REQUEST_KBPS);
+		wil_set_recovery_state(wil, fw_recovery_idle);
+		set_bit(wil_status_resetting, wil->status);
+	}
 
 	mutex_lock(&wil->mutex);
 
 	wmi_pcp_stop(vif);
 
-	__wil_down(wil);
+	if (last)
+		__wil_down(wil);
+	else
+		wil_bcast_fini(vif);
 
 	mutex_unlock(&wil->mutex);
 

drivers/net/wireless/ath/wil6210/main.c

@@ -508,6 +508,18 @@ void wil_bcast_fini(struct wil6210_vif *vif)
 	wil_vring_fini_tx(wil, ri);
 }
 
+void wil_bcast_fini_all(struct wil6210_priv *wil)
+{
+	int i;
+	struct wil6210_vif *vif;
+
+	for (i = 0; i < wil->max_vifs; i++) {
+		vif = wil->vifs[i];
+		if (vif)
+			wil_bcast_fini(vif);
+	}
+}
+
 int wil_priv_init(struct wil6210_priv *wil)
 {
 	uint i;
@@ -1204,7 +1216,7 @@ int wil_reset(struct wil6210_priv *wil, bool load_fw)
 
 	cancel_work_sync(&vif->disconnect_worker);
 	wil6210_disconnect(vif, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
-	wil_bcast_fini(vif);
+	wil_bcast_fini_all(wil);
 
 	/* Disable device led before reset*/
 	wmi_led_cfg(wil, false);

drivers/net/wireless/ath/wil6210/netdev.c

@@ -20,8 +20,8 @@
 #include "wil6210.h"
 #include "txrx.h"
 
-bool wil_has_other_up_ifaces(struct wil6210_priv *wil,
-			     struct net_device *ndev)
+bool wil_has_other_active_ifaces(struct wil6210_priv *wil,
+				 struct net_device *ndev, bool up, bool ok)
 {
 	int i;
 	struct wil6210_vif *vif;
@@ -31,17 +31,19 @@ bool wil_has_other_up_ifaces(struct wil6210_priv *wil,
 		vif = wil->vifs[i];
 		if (vif) {
 			ndev_i = vif_to_ndev(vif);
-			if (ndev_i != ndev && ndev_i->flags & IFF_UP)
-				return true;
+			if (ndev_i != ndev)
+				if ((up && (ndev_i->flags & IFF_UP)) ||
+				    (ok && netif_carrier_ok(ndev_i)))
+					return true;
 		}
 	}
 
 	return false;
 }
 
-bool wil_has_up_ifaces(struct wil6210_priv *wil)
+bool wil_has_active_ifaces(struct wil6210_priv *wil, bool up, bool ok)
 {
-	return wil_has_other_up_ifaces(wil, NULL);
+	return wil_has_other_active_ifaces(wil, NULL, up, ok);
 }
 
 static int wil_open(struct net_device *ndev)
@@ -57,7 +59,7 @@ static int wil_open(struct net_device *ndev)
 		return -EINVAL;
 	}
 
-	if (!wil_has_other_up_ifaces(wil, ndev)) {
+	if (!wil_has_other_active_ifaces(wil, ndev, true, false)) {
 		wil_dbg_misc(wil, "open, first iface\n");
 		rc = wil_pm_runtime_get(wil);
 		if (rc < 0)
@@ -78,7 +80,7 @@ static int wil_stop(struct net_device *ndev)
 
 	wil_dbg_misc(wil, "stop\n");
 
-	if (!wil_has_other_up_ifaces(wil, ndev)) {
+	if (!wil_has_other_active_ifaces(wil, ndev, true, false)) {
 		wil_dbg_misc(wil, "stop, last iface\n");
 		rc = wil_down(wil);
 		if (!rc)
@@ -359,7 +361,7 @@ int wil_vif_add(struct wil6210_priv *wil, struct wil6210_vif *vif)
 {
 	struct net_device *ndev = vif_to_ndev(vif);
 	struct wireless_dev *wdev = vif_to_wdev(vif);
-	bool any_active = wil_has_up_ifaces(wil);
+	bool any_active = wil_has_active_ifaces(wil, true, false);
 	int rc;
 
 	ASSERT_RTNL();
@@ -428,7 +430,7 @@ void wil_vif_remove(struct wil6210_priv *wil, u8 mid)
 {
 	struct wil6210_vif *vif;
 	struct net_device *ndev;
-	bool any_active = wil_has_up_ifaces(wil);
+	bool any_active = wil_has_active_ifaces(wil, true, false);
 
 	ASSERT_RTNL();
 	if (mid >= wil->max_vifs) {

drivers/net/wireless/ath/wil6210/pcie_bus.c

@@ -145,7 +145,7 @@ static void wil_remove_all_additional_vifs(struct wil6210_priv *wil)
 	for (i = 1; i < wil->max_vifs; i++) {
 		vif = wil->vifs[i];
 		if (vif) {
-			wil_vif_prepare_stop(wil, vif);
+			wil_vif_prepare_stop(vif);
 			wil_vif_remove(wil, vif->mid);
 		}
 	}

drivers/net/wireless/ath/wil6210/wil6210.h

@@ -944,9 +944,9 @@ wil_vif_alloc(struct wil6210_priv *wil, const char *name,
 	      unsigned char name_assign_type, enum nl80211_iftype iftype);
 void wil_vif_free(struct wil6210_vif *vif);
 void *wil_if_alloc(struct device *dev);
-bool wil_has_other_up_ifaces(struct wil6210_priv *wil,
-			     struct net_device *ndev);
-bool wil_has_up_ifaces(struct wil6210_priv *wil);
+bool wil_has_other_active_ifaces(struct wil6210_priv *wil,
+				 struct net_device *ndev, bool up, bool ok);
+bool wil_has_active_ifaces(struct wil6210_priv *wil, bool up, bool ok);
 void wil_if_free(struct wil6210_priv *wil);
 int wil_vif_add(struct wil6210_priv *wil, struct wil6210_vif *vif);
 int wil_if_add(struct wil6210_priv *wil);
@@ -1053,7 +1053,7 @@ int wil_cfg80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
 int wil_cfg80211_iface_combinations_from_fw(
 	struct wil6210_priv *wil,
 	const struct wil_fw_record_concurrency *conc);
-int wil_vif_prepare_stop(struct wil6210_priv *wil, struct wil6210_vif *vif);
+int wil_vif_prepare_stop(struct wil6210_vif *vif);
 
 #if defined(CONFIG_WIL6210_DEBUGFS)
 int wil6210_debugfs_init(struct wil6210_priv *wil);
@@ -1095,6 +1095,7 @@ int wil_tx_init(struct wil6210_vif *vif, int cid);
 int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size);
 int wil_bcast_init(struct wil6210_vif *vif);
 void wil_bcast_fini(struct wil6210_vif *vif);
+void wil_bcast_fini_all(struct wil6210_priv *wil);
 
 void wil_update_net_queues(struct wil6210_priv *wil, struct vring *vring,
 			   bool should_stop);

drivers/net/wireless/ath/wil6210/wmi.c

@@ -341,6 +341,10 @@ static const char *cmdid2name(u16 cmdid)
 		return "WMI_GET_PCP_CHANNEL_CMD";
 	case WMI_P2P_CFG_CMDID:
 		return "WMI_P2P_CFG_CMD";
+	case WMI_PORT_ALLOCATE_CMDID:
+		return "WMI_PORT_ALLOCATE_CMD";
+	case WMI_PORT_DELETE_CMDID:
+		return "WMI_PORT_DELETE_CMD";
 	case WMI_START_LISTEN_CMDID:
 		return "WMI_START_LISTEN_CMD";
 	case WMI_START_SEARCH_CMDID:
@@ -479,6 +483,10 @@ static const char *eventid2name(u16 eventid)
 		return "WMI_GET_PCP_CHANNEL_EVENT";
 	case WMI_P2P_CFG_DONE_EVENTID:
 		return "WMI_P2P_CFG_DONE_EVENT";
+	case WMI_PORT_ALLOCATED_EVENTID:
+		return "WMI_PORT_ALLOCATED_EVENT";
+	case WMI_PORT_DELETED_EVENTID:
+		return "WMI_PORT_DELETED_EVENT";
 	case WMI_LISTEN_STARTED_EVENTID:
 		return "WMI_LISTEN_STARTED_EVENT";
 	case WMI_SEARCH_STARTED_EVENTID: