wil6210: add support for adding and removing virtual interfaces

Add generic support in cfg80211 operations add_virtual_intf
and del_virtual_intf for adding/removing VIFs of any
interface type, and fix change_virtual_intf to allow changing
the interface type of a VIF. Previously these operations
only worked for the P2P_DEVICE interface which is not a real
VIF(it is management-only and shares radio with the main
interface).
Currently the interface combination is validated, the VIF is
added/removed in the firmware and the appropriate net/wireless
device is also added/removed.
Added minimal support for proper interface up/down and module
unload but most operations still work 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>

1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
index b151f1c7ce85..2926bd1ae713 100644
--- a/drivers/net/wireless/ath/wil6210/main.c
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -565,6 +565,7 @@ int wil_priv_init(struct wil6210_priv *wil)
 	wil->vring_idle_trsh = 16;
 
 	wil->reply_mid = U8_MAX;
+	wil->max_vifs = 1;
 
 	return 0;
 
@@ -1115,6 +1116,33 @@ static void wil_pre_fw_config(struct wil6210_priv *wil)
 	}
 }
 
+static int wil_restore_vifs(struct wil6210_priv *wil)
+{
+	struct wil6210_vif *vif;
+	struct net_device *ndev;
+	struct wireless_dev *wdev;
+	int i, rc;
+
+	for (i = 0; i < wil->max_vifs; i++) {
+		vif = wil->vifs[i];
+		if (!vif)
+			continue;
+		if (vif->mid) {
+			ndev = vif_to_ndev(vif);
+			wdev = vif_to_wdev(vif);
+			rc = wmi_port_allocate(wil, vif->mid, ndev->dev_addr,
+					       wdev->iftype);
+			if (rc) {
+				wil_err(wil, "fail to restore VIF %d type %d, rc %d\n",
+					i, wdev->iftype, rc);
+				return rc;
+			}
+		}
+	}
+
+	return 0;
+}
+
 /*
  * We reset all the structures, and we reset the UMAC.
  * After calling this routine, you're expected to reload
@@ -1277,6 +1305,12 @@ int wil_reset(struct wil6210_priv *wil, bool load_fw)
 			return rc;
 		}
 
+		rc = wil_restore_vifs(wil);
+		if (rc) {
+			wil_err(wil, "failed to restore vifs, rc %d\n", rc);
+			return rc;
+		}
+
 		wil_collect_fw_info(wil);
 
 		if (wil->ps_profile != WMI_PS_PROFILE_TYPE_DEFAULT)