mwifiex: add tdls channel switch status

This patch add new tdls status used for tdls channel switch.
Driver in turn would block cmd path and data path if tdls
channel switching. Data path to non tdls peer should be blocked
if tdls channel switch to off-channel.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

4 files changed, 77 insertions, 2 deletions

diff --git a/drivers/net/wireless/mwifiex/decl.h b/drivers/net/wireless/mwifiex/decl.h
index 51e344789ba2..098e1f14dc9a 100644
--- a/drivers/net/wireless/mwifiex/decl.h
+++ b/drivers/net/wireless/mwifiex/decl.h
@@ -141,6 +141,9 @@ enum mwifiex_tdls_status {
 	TDLS_SETUP_COMPLETE,
 	TDLS_SETUP_FAILURE,
 	TDLS_LINK_TEARDOWN,
+	TDLS_CHAN_SWITCHING,
+	TDLS_IN_BASE_CHAN,
+	TDLS_IN_OFF_CHAN,
 };
 
 enum mwifiex_tdls_error_code {
diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index 3ba4e0e04223..2a2e5dbab8dd 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -299,9 +299,15 @@ process_start:
 
 			if ((!adapter->scan_chan_gap_enabled &&
 			     adapter->scan_processing) || adapter->data_sent ||
+			     mwifiex_is_tdls_chan_switching
+			     (mwifiex_get_priv(adapter,
+					       MWIFIEX_BSS_ROLE_STA)) ||
 			    (mwifiex_wmm_lists_empty(adapter) &&
 			     skb_queue_empty(&adapter->tx_data_q))) {
 				if (adapter->cmd_sent || adapter->curr_cmd ||
+					!mwifiex_is_send_cmd_allowed
+						(mwifiex_get_priv(adapter,
+						MWIFIEX_BSS_ROLE_STA)) ||
 				    (!is_command_pending(adapter)))
 					break;
 			}
@@ -342,7 +348,9 @@ process_start:
 			continue;
 		}
 
-		if (!adapter->cmd_sent && !adapter->curr_cmd) {
+		if (!adapter->cmd_sent && !adapter->curr_cmd &&
+		    mwifiex_is_send_cmd_allowed
+		    (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
 			if (mwifiex_exec_next_cmd(adapter) == -1) {
 				ret = -1;
 				break;
@@ -365,7 +373,9 @@ process_start:
 
 		if ((adapter->scan_chan_gap_enabled ||
 		     !adapter->scan_processing) &&
-		    !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) {
+		    !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) &&
+		    !mwifiex_is_tdls_chan_switching
+			(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
 			mwifiex_wmm_process_tx(adapter);
 			if (adapter->hs_activated) {
 				adapter->is_hs_configured = false;
diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index 2106a5c24692..d27e6aa63446 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -1461,6 +1461,9 @@ struct mwifiex_sta_node *
 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac);
 struct mwifiex_sta_node *
 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac);
+u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv);
+u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv);
+u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv);
 int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv, const u8 *peer,
 				 u8 action_code, u8 dialog_token,
 				 u16 status_code, const u8 *extra_ies,
diff --git a/drivers/net/wireless/mwifiex/util.c b/drivers/net/wireless/mwifiex/util.c
index 790e61953abf..2504e422364a 100644
--- a/drivers/net/wireless/mwifiex/util.c
+++ b/drivers/net/wireless/mwifiex/util.c
@@ -531,6 +531,65 @@ mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
 	return NULL;
 }
 
+static struct mwifiex_sta_node *
+mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status)
+{
+	struct mwifiex_sta_node *node;
+
+	list_for_each_entry(node, &priv->sta_list, list) {
+		if (node->tdls_status == status)
+			return node;
+	}
+
+	return NULL;
+}
+
+/* If tdls channel switching is on-going, tx data traffic should be
+ * blocked until the switching stage completed.
+ */
+u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv)
+{
+	struct mwifiex_sta_node *sta_ptr;
+
+	if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
+		return false;
+
+	sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING);
+	if (sta_ptr)
+		return true;
+
+	return false;
+}
+
+u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv)
+{
+	struct mwifiex_sta_node *sta_ptr;
+
+	if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
+		return false;
+
+	sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN);
+	if (sta_ptr)
+		return true;
+
+	return false;
+}
+
+/* If tdls channel switching is on-going or tdls operate on off-channel,
+ * cmd path should be blocked until tdls switched to base-channel.
+ */
+u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv)
+{
+	if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
+		return true;
+
+	if (mwifiex_is_tdls_chan_switching(priv) ||
+	    mwifiex_is_tdls_off_chan(priv))
+		return false;
+
+	return true;
+}
+
 /* This function will add a sta_node entry to associated station list
  * table with the given mac address.
  * If entry exist already, existing entry is returned.