Bluetooth: Read LE Max data length command

This patch adds the MGMT command and code to support reading
the maximum data length supported command for LE.

Change-Id: I4dc0041f2070de2ccb6a4164c8823612863c941e
Signed-off-by: Sudha Bheemanna <b.sudha@samsung.com>

4 files changed, 99 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 0df3493056c3..b1ae6e3fd214 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1552,6 +1552,8 @@ void mgmt_multi_adv_state_change_evt(struct hci_dev *hdev, u8 adv_instance,
 		u8 state_change_reason, u16 connection_handle);
 void mgmt_6lowpan_conn_changed(struct hci_dev *hdev, char if_name[16],
 		bdaddr_t *bdaddr, u8 addr_type, bool connected);
+void mgmt_le_read_maximum_data_length_complete(struct hci_dev *hdev,
+		u8 status);
 #endif
 
 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
diff --git a/include/net/bluetooth/mgmt_tizen.h b/include/net/bluetooth/mgmt_tizen.h
index 03a4d63ce84b..212afd95b9fc 100644
--- a/include/net/bluetooth/mgmt_tizen.h
+++ b/include/net/bluetooth/mgmt_tizen.h
@@ -185,6 +185,15 @@ struct mgmt_cp_disconnect_6lowpan {
 } __packed;
 #define MGMT_DISCONNECT_6LOWPAN_SIZE		7
 
+#define MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH	(TIZEN_OP_CODE_BASE + 0x15)
+struct mgmt_rp_le_read_maximum_data_length {
+	__le16	max_tx_octets;
+	__le16	max_tx_time;
+	__le16	max_rx_octets;
+	__le16	max_rx_time;
+} __packed;
+#define MGMT_LE_READ_MAXIMUM_DATA_LENGTH_SIZE	0
+
 /* EVENTS */
 
 /* For device name update changes */
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index f1308d5ab07a..d907b138b079 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1368,13 +1368,22 @@ static void hci_cc_le_read_max_data_len(struct hci_dev *hdev,
 
 	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 
+#ifndef TIZEN_BT
 	if (rp->status)
 		return;
+#else
+	hci_dev_lock(hdev);
+#endif
 
 	hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
 	hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
 	hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
 	hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
+
+#ifdef TIZEN_BT
+	mgmt_le_read_maximum_data_length_complete(hdev, rp->status);
+	hci_dev_unlock(hdev);
+#endif
 }
 
 static void hci_cc_write_le_host_supported(struct hci_dev *hdev,
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 0d005e563410..fc087d12b826 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -7474,6 +7474,83 @@ void mgmt_6lowpan_conn_changed(struct hci_dev *hdev, char if_name[16],
 
 	mgmt_event(MGMT_EV_6LOWPAN_CONN_STATE_CHANGED, hdev, ev, ev_size, NULL);
 }
+
+void mgmt_le_read_maximum_data_length_complete(struct hci_dev *hdev, u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct mgmt_rp_le_read_maximum_data_length rp;
+
+	BT_DBG("%s status %u", hdev->name, status);
+
+	cmd = pending_find(MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH, hdev);
+	if (!cmd)
+		return;
+
+	if (status)
+		mgmt_cmd_status(cmd->sk, hdev->id,
+				MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH,
+				mgmt_status(status));
+
+	memset(&rp, 0, sizeof(rp));
+
+	rp.max_tx_octets = cpu_to_le16(hdev->le_max_tx_len);
+	rp.max_tx_time = cpu_to_le16(hdev->le_max_tx_time);
+	rp.max_rx_octets = cpu_to_le16(hdev->le_max_rx_len);
+	rp.max_rx_time = cpu_to_le16(hdev->le_max_rx_time);
+
+	mgmt_cmd_complete(cmd->sk, hdev->id,
+			  MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH, 0,
+			  &rp, sizeof(rp));
+
+	mgmt_pending_remove(cmd);
+}
+
+static int read_maximum_le_data_length(struct sock *sk,
+		struct hci_dev *hdev, void *data, u16 len)
+{
+	struct mgmt_pending_cmd *cmd;
+	int err;
+
+	BT_DBG("read_maximum_le_data_length  %s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH,
+				      MGMT_STATUS_NOT_POWERED);
+		goto unlock;
+	}
+
+	if (!lmp_le_capable(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH,
+				      MGMT_STATUS_NOT_SUPPORTED);
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_LE_READ_MAXIMUM_DATA_LENGTH,
+			       hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	err = hci_send_cmd(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+	return err;
+}
 #endif /* TIZEN_BT */
 
 static bool ltk_is_valid(struct mgmt_ltk_info *key)
@@ -9367,6 +9444,8 @@ static const struct hci_mgmt_handler tizen_mgmt_handlers[] = {
 	{ enable_bt_6lowpan,       MGMT_ENABLE_BT_6LOWPAN_SIZE },
 	{ connect_bt_6lowpan,      MGMT_CONNECT_6LOWPAN_SIZE },
 	{ disconnect_bt_6lowpan,   MGMT_DISCONNECT_6LOWPAN_SIZE },
+	{ read_maximum_le_data_length,
+				   MGMT_LE_READ_MAXIMUM_DATA_LENGTH_SIZE },
 };
 #endif