Bluetooth: Add LE L2CAP flow control mode

The LE connection oriented channels have their own mode with its own
data transfer rules. In order to implement this properly we need to
distinguish L2CAP channels operating in this mode from other modes.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index 84b25202596e..063d786b0991 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -328,6 +328,12 @@ struct l2cap_conf_rfc {
 #define L2CAP_MODE_ERTM         0x03
 #define L2CAP_MODE_STREAMING    0x04
 
+/* Unlike the above this one doesn't actually map to anything that would
+ * ever be sent over the air. Therefore, use a value that's unlikely to
+ * ever be used in the BR/EDR configuration phase.
+ */
+#define L2CAP_MODE_LE_FLOWCTL   0x80
+
 struct l2cap_conf_efs {
         __u8    id;
         __u8    stype;
@@ -861,6 +867,7 @@ int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
 int l2cap_chan_check_security(struct l2cap_chan *chan);
 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
+void l2cap_le_flowctl_init(struct l2cap_chan *chan);
 int l2cap_ertm_init(struct l2cap_chan *chan);
 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);