ath6kl: Implement add_virtual_intf() and del_virtual_intf()

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

4 files changed, 133 insertions, 6 deletions

diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 893bd2c30720..87ede6265788 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -293,6 +293,57 @@ static int ath6kl_set_assoc_req_ies(struct ath6kl_vif *vif, const u8 *ies,
         return ret;
 }
 
+static int ath6kl_nliftype_to_drv_iftype(enum nl80211_iftype type, u8 *nw_type)
+{
+        switch (type) {
+        case NL80211_IFTYPE_STATION:
+                *nw_type = INFRA_NETWORK;
+                break;
+        case NL80211_IFTYPE_ADHOC:
+                *nw_type = ADHOC_NETWORK;
+                break;
+        case NL80211_IFTYPE_AP:
+                *nw_type = AP_NETWORK;
+                break;
+        case NL80211_IFTYPE_P2P_CLIENT:
+                *nw_type = INFRA_NETWORK;
+                break;
+        case NL80211_IFTYPE_P2P_GO:
+                *nw_type = AP_NETWORK;
+                break;
+        default:
+                ath6kl_err("invalid interface type %u\n", type);
+                return -ENOTSUPP;
+        }
+
+        return 0;
+}
+
+static bool ath6kl_is_valid_iftype(struct ath6kl *ar, enum nl80211_iftype type,
+                                   u8 *if_idx, u8 *nw_type)
+{
+        int i;
+
+        if (ath6kl_nliftype_to_drv_iftype(type, nw_type))
+                return false;
+
+        if (ar->ibss_if_active || ((type == NL80211_IFTYPE_ADHOC) &&
+            ar->num_vif))
+                return false;
+
+        if (type == NL80211_IFTYPE_STATION ||
+            type == NL80211_IFTYPE_AP || type == NL80211_IFTYPE_ADHOC) {
+                for (i = 0; i < MAX_NUM_VIF; i++) {
+                        if ((ar->avail_idx_map >> i) & BIT(0)) {
+                                *if_idx = i;
+                                return true;
+                        }
+                }
+        }
+
+        return false;
+}
+
 static int ath6kl_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
                                    struct cfg80211_connect_params *sme)
 {
@@ -1206,6 +1257,52 @@ static int ath6kl_cfg80211_set_power_mgmt(struct wiphy *wiphy,
         return 0;
 }
 
+static struct net_device *ath6kl_cfg80211_add_iface(struct wiphy *wiphy,
+                                                    char *name,
+                                                    enum nl80211_iftype type,
+                                                    u32 *flags,
+                                                    struct vif_params *params)
+{
+        struct ath6kl *ar = wiphy_priv(wiphy);
+        struct net_device *ndev;
+        u8 if_idx, nw_type;
+
+        if (ar->num_vif == MAX_NUM_VIF) {
+                ath6kl_err("Reached maximum number of supported vif\n");
+                return ERR_PTR(-EINVAL);
+        }
+
+        if (!ath6kl_is_valid_iftype(ar, type, &if_idx, &nw_type)) {
+                ath6kl_err("Not a supported interface type\n");
+                return ERR_PTR(-EINVAL);
+        }
+
+        ndev = ath6kl_interface_add(ar, name, type, if_idx, nw_type);
+        if (!ndev)
+                return ERR_PTR(-ENOMEM);
+
+        ar->num_vif++;
+
+        return ndev;
+}
+
+static int ath6kl_cfg80211_del_iface(struct wiphy *wiphy,
+                                     struct net_device *ndev)
+{
+        struct ath6kl *ar = wiphy_priv(wiphy);
+        struct ath6kl_vif *vif = netdev_priv(ndev);
+
+        spin_lock(&ar->list_lock);
+        list_del(&vif->list);
+        spin_unlock(&ar->list_lock);
+
+        ath6kl_cleanup_vif(vif, test_bit(WMI_READY, &ar->flag));
+
+        ath6kl_deinit_if_data(vif);
+
+        return 0;
+}
+
 static int ath6kl_cfg80211_change_iface(struct wiphy *wiphy,
                                         struct net_device *ndev,
                                         enum nl80211_iftype type, u32 *flags,
@@ -1947,6 +2044,8 @@ ath6kl_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 };
 
 static struct cfg80211_ops ath6kl_cfg80211_ops = {
+        .add_virtual_intf = ath6kl_cfg80211_add_iface,
+        .del_virtual_intf = ath6kl_cfg80211_del_iface,
         .change_virtual_intf = ath6kl_cfg80211_change_iface,
         .scan = ath6kl_cfg80211_scan,
         .connect = ath6kl_cfg80211_connect,
@@ -2097,18 +2196,28 @@ static int ath6kl_init_if_data(struct ath6kl_vif *vif)
 
 void ath6kl_deinit_if_data(struct ath6kl_vif *vif)
 {
+        struct ath6kl *ar = vif->ar;
+
         aggr_module_destroy(vif->aggr_cntxt);
 
+        ar->avail_idx_map |= BIT(vif->fw_vif_idx);
+
+        if (vif->nw_type == ADHOC_NETWORK)
+                ar->ibss_if_active = false;
+
         unregister_netdevice(vif->ndev);
+
+        ar->num_vif--;
 }
 
 struct net_device *ath6kl_interface_add(struct ath6kl *ar, char *name,
-                                        enum nl80211_iftype type, u8 fw_vif_idx)
+                                        enum nl80211_iftype type, u8 fw_vif_idx,
+                                        u8 nw_type)
 {
         struct net_device *ndev;
         struct ath6kl_vif *vif;
 
-        ndev = alloc_netdev(sizeof(*vif), "wlan%d", ether_setup);
+        ndev = alloc_netdev(sizeof(*vif), name, ether_setup);
         if (!ndev)
                 return NULL;
 
@@ -2121,8 +2230,14 @@ struct net_device *ath6kl_interface_add(struct ath6kl *ar, char *name,
         vif->wdev.netdev = ndev;
         vif->wdev.iftype = type;
         vif->fw_vif_idx = fw_vif_idx;
+        vif->nw_type = vif->next_mode = nw_type;
         ar->wdev = &vif->wdev;
 
+        memcpy(ndev->dev_addr, ar->mac_addr, ETH_ALEN);
+        if (fw_vif_idx != 0)
+                ndev->dev_addr[0] = (ndev->dev_addr[0] ^ (1 << fw_vif_idx)) |
+                                     0x2;
+
         init_netdev(ndev);
 
         ath6kl_init_control_info(vif);
@@ -2134,11 +2249,15 @@ struct net_device *ath6kl_interface_add(struct ath6kl *ar, char *name,
         if (register_netdevice(ndev))
                 goto err;
 
+        ar->avail_idx_map &= ~BIT(fw_vif_idx);
         vif->sme_state = SME_DISCONNECTED;
         set_bit(WLAN_ENABLED, &vif->flags);
         ar->wlan_pwr_state = WLAN_POWER_STATE_ON;
         set_bit(NETDEV_REGISTERED, &vif->flags);
 
+        if (type == NL80211_IFTYPE_ADHOC)
+                ar->ibss_if_active = true;
+
         spin_lock(&ar->list_lock);
         list_add_tail(&vif->list, &ar->vif_list);
         spin_unlock(&ar->list_lock);
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.h b/drivers/net/wireless/ath/ath6kl/cfg80211.h
index 66042f2e7adb..d1a0216d7cf9 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.h
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.h
@@ -19,7 +19,7 @@
 
 struct net_device *ath6kl_interface_add(struct ath6kl *ar, char *name,
                                         enum nl80211_iftype type,
-                                        u8 fw_vif_idx);
+                                        u8 fw_vif_idx, u8 nw_type);
 int ath6kl_register_ieee80211_hw(struct ath6kl *ar);
 struct ath6kl *ath6kl_core_alloc(struct device *dev);
 void ath6kl_deinit_ieee80211_hw(struct ath6kl *ar);
diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index 29bb2357a5cc..6933fb62ac46 100644
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -460,6 +460,8 @@ struct ath6kl {
         struct list_head vif_list;
         /* Lock to avoid race in vif_list entries among add/del/traverse */
         spinlock_t list_lock;
+        u8 num_vif;
+        u8 avail_idx_map;
         spinlock_t lock;
         struct semaphore sem;
         u16 listen_intvl_b;
@@ -470,6 +472,7 @@ struct ath6kl {
         u8 tx_pwr;
         struct ath6kl_node_mapping node_map[MAX_NODE_NUM];
         u8 ibss_ps_enable;
+        bool ibss_if_active;
         u8 node_num;
         u8 next_ep_id;
         struct ath6kl_cookie *cookie_list;
@@ -666,4 +669,5 @@ void ath6kl_init_control_info(struct ath6kl_vif *vif);
 void ath6kl_deinit_if_data(struct ath6kl_vif *vif);
 void ath6kl_core_free(struct ath6kl *ar);
 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar);
+void ath6kl_cleanup_vif(struct ath6kl_vif *vif, bool wmi_ready);
 #endif /* CORE_H */
diff --git a/drivers/net/wireless/ath/ath6kl/init.c b/drivers/net/wireless/ath/ath6kl/init.c
index 60dbf721eb87..ce34fff605ad 100644
--- a/drivers/net/wireless/ath/ath6kl/init.c
+++ b/drivers/net/wireless/ath/ath6kl/init.c
@@ -88,7 +88,6 @@ void ath6kl_init_profile_info(struct ath6kl_vif *vif)
         memset(vif->req_bssid, 0, sizeof(vif->req_bssid));
         memset(vif->bssid, 0, sizeof(vif->bssid));
         vif->bss_ch = 0;
-        vif->nw_type = vif->next_mode = INFRA_NETWORK;
 }
 
 static int ath6kl_set_host_app_area(struct ath6kl *ar)
@@ -1414,6 +1413,7 @@ static int ath6kl_init(struct ath6kl *ar)
         int status = 0;
         s32 timeleft;
         struct net_device *ndev;
+        int i;
 
         if (!ar)
                 return -EIO;
@@ -1445,10 +1445,14 @@ static int ath6kl_init(struct ath6kl *ar)
                 goto err_node_cleanup;
         }
 
+        for (i = 0; i < MAX_NUM_VIF; i++)
+                ar->avail_idx_map |= BIT(i);
+
         rtnl_lock();
 
         /* Add an initial station interface */
-        ndev = ath6kl_interface_add(ar, "wlan%d", NL80211_IFTYPE_STATION, 0);
+        ndev = ath6kl_interface_add(ar, "wlan%d", NL80211_IFTYPE_STATION, 0,
+                                    INFRA_NETWORK);
 
         rtnl_unlock();
 
@@ -1632,7 +1636,7 @@ err_wq:
         return ret;
 }
 
-static void ath6kl_cleanup_vif(struct ath6kl_vif *vif, bool wmi_ready)
+void ath6kl_cleanup_vif(struct ath6kl_vif *vif, bool wmi_ready)
 {
         static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
         bool discon_issued;