Bluetooth: Read host suggested default le data length

This patch adds MGMT command and code for supporting reading
default le data length value set at the controller.

Change-Id: I2b81982dc26ed5af4a8f8a3d3913db5d64625260
Signed-off-by: Sudha Bheemanna <b.sudha@samsung.com>
Signed-off-by: Amit Purwar <amit.purwar@samsung.com>

4 files changed, 100 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index b4cf0728b872..cdb4b7d929da 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1718,6 +1718,8 @@ void mgmt_le_read_maximum_data_length_complete(struct hci_dev *hdev,
 		u8 status);
 void mgmt_le_write_host_suggested_data_length_complete(struct hci_dev *hdev,
 		u8 status);
+void mgmt_le_read_host_suggested_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 0f36ecdcad2b..2d11d5bf4f0b 100644
--- a/include/net/bluetooth/mgmt_tizen.h
+++ b/include/net/bluetooth/mgmt_tizen.h
@@ -201,6 +201,13 @@ struct mgmt_cp_le_write_host_suggested_data_length {
 } __packed;
 #define MGMT_LE_WRITE_HOST_SUGGESTED_DATA_LENGTH_SIZE	4
 
+#define MGMT_OP_LE_READ_HOST_SUGGESTED_DATA_LENGTH	(TIZEN_OP_CODE_BASE + 0x17)
+struct mgmt_rp_le_read_host_suggested_data_length {
+	__le16	def_tx_octets;
+	__le16	def_tx_time;
+} __packed;
+#define MGMT_LE_READ_HOST_SUGGESTED_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 10b63f6b12bf..82bcc68a65d3 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1449,11 +1449,21 @@ static void hci_cc_le_read_def_data_len(struct hci_dev *hdev,
 
 	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
 
+#ifdef TIZEN_BT
+	hci_dev_lock(hdev);
+#else
 	if (rp->status)
 		return;
+#endif
 
 	hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
 	hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
+
+#ifdef TIZEN_BT
+	mgmt_le_read_host_suggested_data_length_complete(hdev, rp->status);
+
+	hci_dev_unlock(hdev);
+#endif
 }
 
 static void hci_cc_le_write_def_data_len(struct hci_dev *hdev,
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 693c0148df27..a449faf8322d 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -7208,6 +7208,85 @@ unlock:
 
 	return err;
 }
+
+void mgmt_le_read_host_suggested_data_length_complete(struct hci_dev *hdev,
+		u8 status)
+{
+	struct mgmt_pending_cmd *cmd;
+	struct mgmt_rp_le_read_host_suggested_data_length rp;
+
+	BT_DBG("%s status %u", hdev->name, status);
+
+	cmd = pending_find(MGMT_OP_LE_READ_HOST_SUGGESTED_DATA_LENGTH, hdev);
+	if (!cmd) {
+		BT_ERR("cmd not found in the pending list");
+		return;
+	}
+
+	if (status)
+		mgmt_cmd_status(cmd->sk, hdev->id,
+			MGMT_OP_LE_READ_HOST_SUGGESTED_DATA_LENGTH,
+			mgmt_status(status));
+
+	memset(&rp, 0, sizeof(rp));
+
+	rp.def_tx_octets = cpu_to_le16(hdev->le_def_tx_len);
+	rp.def_tx_time = cpu_to_le16(hdev->le_def_tx_time);
+
+	mgmt_cmd_complete(cmd->sk, hdev->id,
+			  MGMT_OP_LE_READ_HOST_SUGGESTED_DATA_LENGTH, 0,
+			  &rp, sizeof(rp));
+
+	mgmt_pending_remove(cmd);
+}
+
+static int read_host_suggested_data_length(struct sock *sk,
+		struct hci_dev *hdev, void *data, u16 len)
+{
+	struct mgmt_pending_cmd *cmd;
+	int err;
+
+	BT_DBG("read_host_suggested_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_HOST_SUGGESTED_DATA_LENGTH,
+				MGMT_STATUS_NOT_POWERED);
+		goto unlock;
+	}
+
+	if (!lmp_le_capable(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				MGMT_OP_LE_READ_HOST_SUGGESTED_DATA_LENGTH,
+				MGMT_STATUS_NOT_SUPPORTED);
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_LE_READ_HOST_SUGGESTED_DATA_LENGTH, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				MGMT_OP_LE_READ_HOST_SUGGESTED_DATA_LENGTH,
+				MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_LE_READ_HOST_SUGGESTED_DATA_LENGTH,
+			       hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	err = hci_send_cmd(hdev, HCI_OP_LE_READ_DEF_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)
@@ -9187,6 +9266,8 @@ static const struct hci_mgmt_handler tizen_mgmt_handlers[] = {
 				   MGMT_LE_READ_MAXIMUM_DATA_LENGTH_SIZE },
 	{ write_host_suggested_le_data_length,
 				   MGMT_LE_WRITE_HOST_SUGGESTED_DATA_LENGTH_SIZE },
+	{ read_host_suggested_data_length,
+				   MGMT_LE_READ_HOST_SUGGESTED_DATA_LENGTH_SIZE },
 };
 #endif