Bluetooth: AMP: Physical link struct and helpers

Define physical link structures. Physical links are represented by
hci_conn structure. For BR/EDR we use type ACL_LINK and for AMP
we use AMP_LINK.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

4 files changed, 34 insertions, 0 deletions

diff --git a/include/net/bluetooth/amp.h b/include/net/bluetooth/amp.h
index e8616751bc81..3414dfdc404c 100644
--- a/include/net/bluetooth/amp.h
+++ b/include/net/bluetooth/amp.h
@@ -14,6 +14,9 @@
 #ifndef __AMP_H
 #define __AMP_H
 
+struct hci_conn *phylink_add(struct hci_dev *hdev, struct amp_mgr *mgr,
+                             u8 remote_id);
+
 void amp_read_loc_info(struct hci_dev *hdev, struct amp_mgr *mgr);
 void amp_read_loc_assoc_frag(struct hci_dev *hdev, u8 phy_handle);
 void amp_read_loc_assoc(struct hci_dev *hdev, struct amp_mgr *mgr);
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index ccc08e57c107..77b6a197a6f6 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -207,6 +207,7 @@ enum {
 #define ESCO_LINK       0x02
 /* Low Energy links do not have defined link type. Use invented one */
 #define LE_LINK         0x80
+#define AMP_LINK        0x81
 
 /* LMP features */
 #define LMP_3SLOT       0x01
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index b1c7d0607244..464eae340419 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -318,6 +318,7 @@ struct hci_conn {
 
         __u8            remote_cap;
         __u8            remote_auth;
+        __u8            remote_id;
         bool            flush_key;
 
         unsigned int    sent;
diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c
index 2d4e79ee06a5..50a7b2fb8bf3 100644
--- a/net/bluetooth/amp.c
+++ b/net/bluetooth/amp.c
@@ -17,6 +17,35 @@
 #include <net/bluetooth/a2mp.h>
 #include <net/bluetooth/amp.h>
 
+/* Physical Link interface */
+static u8 __next_handle(struct amp_mgr *mgr)
+{
+        if (++mgr->handle == 0)
+                mgr->handle = 1;
+
+        return mgr->handle;
+}
+
+struct hci_conn *phylink_add(struct hci_dev *hdev, struct amp_mgr *mgr,
+                             u8 remote_id)
+{
+        bdaddr_t *dst = mgr->l2cap_conn->dst;
+        struct hci_conn *hcon;
+
+        hcon = hci_conn_add(hdev, AMP_LINK, dst);
+        if (!hcon)
+                return NULL;
+
+        hcon->state = BT_CONNECT;
+        hcon->out = true;
+        hcon->attempt++;
+        hcon->handle = __next_handle(mgr);
+        hcon->remote_id = remote_id;
+        hcon->amp_mgr = mgr;
+
+        return hcon;
+}
+
 void amp_read_loc_assoc_frag(struct hci_dev *hdev, u8 phy_handle)
 {
         struct hci_cp_read_local_amp_assoc cp;