Bluetooth: Set le data length command and event

Sets the data length for the le data packet with in the
advised limits. MGMT command and event are added to handle
the setting of data length.

Change-Id: I3dbcbba83098e17f0e6da209753f8924ffb67678
Signed-off-by: Sudha Bheemanna <b.sudha@samsung.com>

5 files changed, 193 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 7843ada51bc7..f9d117c1bf14 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -465,6 +465,12 @@ struct hci_conn {
 	__u8		remote_id;
 
 	unsigned int	sent;
+#ifdef TIZEN_BT
+	__u16		tx_len;
+	__u16		tx_time;
+	__u16		rx_len;
+	__u16		rx_time;
+#endif
 
 	struct sk_buff_head data_q;
 	struct list_head chan_list;
@@ -515,6 +521,10 @@ struct hci_conn_params {
 	u16 conn_latency;
 	u16 supervision_timeout;
 
+#ifdef TIZEN_BT
+	u16 max_tx_octets;
+	u16 max_tx_time;
+#endif
 	enum {
 		HCI_AUTO_CONN_DISABLED,
 		HCI_AUTO_CONN_REPORT,
@@ -1558,6 +1568,10 @@ 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);
+void mgmt_le_data_length_change_complete(struct hci_dev *hdev,
+		bdaddr_t *bdaddr, u16 tx_octets, u16 tx_time,
+		u16 rx_octets, u16 rx_time);
+int hci_le_set_data_length(struct hci_conn *conn, u16 tx_octets, u16 tx_time);
 #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 022e51060713..cfb9d5064789 100644
--- a/include/net/bluetooth/mgmt_tizen.h
+++ b/include/net/bluetooth/mgmt_tizen.h
@@ -208,6 +208,20 @@ struct mgmt_rp_le_read_host_suggested_data_length {
 } __packed;
 #define MGMT_LE_READ_HOST_SUGGESTED_DATA_LENGTH_SIZE	0
 
+#define MGMT_OP_LE_SET_DATA_LENGTH		(TIZEN_OP_CODE_BASE + 0x18)
+struct mgmt_cp_le_set_data_length {
+	bdaddr_t	bdaddr;
+	__le16	max_tx_octets;
+	__le16	max_tx_time;
+} __packed;
+#define MGMT_LE_SET_DATA_LENGTH_SIZE		10
+
+struct mgmt_rp_le_set_data_length {
+	__u8	status;
+	__le16	handle;
+} __packed;
+#define MGMT_LE_SET_DATA_LENGTH_RSP_SIZE	3
+
 /* EVENTS */
 
 /* For device name update changes */
@@ -295,4 +309,14 @@ struct mgmt_ev_6lowpan_conn_state_changed {
 	__u8	connected;
 	__u8	ifname[16];
 } __packed;
+
+#define MGMT_EV_LE_DATA_LENGTH_CHANGED		(TIZEN_EV_BASE + 0x0d)
+struct mgmt_ev_le_data_length_changed {
+	struct	mgmt_addr_info addr;
+	__le16	max_tx_octets;
+	__le16	max_tx_time;
+	__le16	max_rx_octets;
+	__le16	max_rx_time;
+} __packed;
+
 #endif	/* __MGMT_TIZEN_H */
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 93a97c1d99d5..1848ff8e93da 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -1173,6 +1173,35 @@ int hci_conn_change_supervision_timeout(struct hci_conn *conn, __u16 timeout)
 
 	return 0;
 }
+
+int hci_le_set_data_length(struct hci_conn *conn, u16 tx_octets, u16 tx_time)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_conn_params *params;
+	struct hci_cp_le_set_data_len cp;
+
+	hci_dev_lock(hdev);
+
+	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
+	if (params) {
+		params->max_tx_octets = tx_octets;
+		params->max_tx_time = tx_time;
+	}
+
+	hci_dev_unlock(hdev);
+
+	memset(&cp, 0, sizeof(cp));
+	cp.handle = cpu_to_le16(conn->handle);
+	cp.tx_len = cpu_to_le16(tx_octets);
+	cp.tx_time = cpu_to_le16(tx_time);
+
+	hci_send_cmd(hdev, HCI_OP_LE_SET_DATA_LEN, sizeof(cp), &cp);
+
+	if (params)
+		return 0x01;
+
+	return 0x00;
+}
 #endif
 
 /* Enter active mode */
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index e72f98150d02..f49d81e5ba95 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1567,6 +1567,31 @@ static void hci_vendor_specific_evt(struct hci_dev *hdev, struct sk_buff *skb)
 		break;
 	}
 }
+
+static void hci_le_data_length_changed_complete_evt(struct hci_dev *hdev,
+		struct sk_buff *skb)
+{
+	struct hci_ev_le_data_len_change *ev = (void *)skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
+	if (conn) {
+		conn->tx_len = le16_to_cpu(ev->tx_len);
+		conn->tx_time = le16_to_cpu(ev->tx_time);
+		conn->rx_len = le16_to_cpu(ev->rx_len);
+		conn->rx_time = le16_to_cpu(ev->rx_time);
+	}
+
+	mgmt_le_data_length_change_complete(hdev, &conn->dst,
+					    conn->tx_len, conn->tx_time,
+					    conn->rx_len, conn->rx_time);
+
+	hci_dev_unlock(hdev);
+}
 #endif
 
 static void hci_cc_read_rssi(struct hci_dev *hdev, struct sk_buff *skb)
@@ -5386,6 +5411,12 @@ static void hci_le_meta_evt(struct hci_dev *hdev, struct sk_buff *skb)
 		hci_le_direct_adv_report_evt(hdev, skb);
 		break;
 
+#ifdef TIZEN_BT
+	case HCI_EV_LE_DATA_LEN_CHANGE:
+		hci_le_data_length_changed_complete_evt(hdev, skb);
+		break;
+#endif
+
 	default:
 		break;
 	}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 53896298e379..565b4400663b 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -7716,6 +7716,99 @@ unlock:
 
 	return err;
 }
+
+static int set_le_data_length_params(struct sock *sk, struct hci_dev *hdev,
+		void *data, u16 len)
+{
+	struct mgmt_cp_le_set_data_length *cp = data;
+	struct mgmt_rp_le_set_data_length *rp;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_conn *conn;
+	int err = 0;
+	u16 max_tx_octets, max_tx_time;
+	size_t rp_len;
+
+	BT_INFO("Set Data length for the device %s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	rp_len = sizeof(*rp);
+	rp = kmalloc(rp_len, GFP_KERNEL);
+	if (!rp) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_LE_SET_DATA_LENGTH,
+				      MGMT_STATUS_NOT_POWERED);
+		goto unlock;
+	}
+
+	if (!lmp_le_capable(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_LE_SET_DATA_LENGTH,
+				      MGMT_STATUS_NOT_SUPPORTED);
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_LE_SET_DATA_LENGTH, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_LE_SET_DATA_LENGTH,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_LE_SET_DATA_LENGTH, hdev, data, len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	max_tx_octets = __le16_to_cpu(cp->max_tx_octets);
+	max_tx_time = __le16_to_cpu(cp->max_tx_time);
+
+	BT_DBG("max_tx_octets 0x%4.4x max_tx_time 0x%4.4x latency",
+	       max_tx_octets, max_tx_time);
+
+	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, &cp->bdaddr);
+	if (!conn) {
+		mgmt_cmd_status(sk, hdev->id, MGMT_OP_LE_SET_DATA_LENGTH,
+				MGMT_STATUS_NOT_CONNECTED);
+		goto unlock;
+	}
+
+	hci_dev_unlock(hdev);
+
+	err = hci_le_set_data_length(conn, max_tx_octets, max_tx_time);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+	rp->handle = conn->handle;
+	rp->status = 0;
+
+	hci_dev_lock(hdev);
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_LE_SET_DATA_LENGTH, 0,
+				rp, rp_len);
+unlock:
+	kfree(rp);
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
+void mgmt_le_data_length_change_complete(struct hci_dev *hdev,
+		bdaddr_t *bdaddr, u16 tx_octets, u16 tx_time,
+		u16 rx_octets, u16 rx_time)
+{
+	struct mgmt_ev_le_data_length_changed ev;
+
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.max_tx_octets = tx_octets;
+	ev.max_tx_time = tx_time;
+	ev.max_rx_octets = rx_octets;
+	ev.max_rx_time = rx_time;
+
+	mgmt_event(MGMT_EV_LE_DATA_LENGTH_CHANGED, hdev, &ev, sizeof(ev), NULL);
+}
 #endif /* TIZEN_BT */
 
 static bool ltk_is_valid(struct mgmt_ltk_info *key)
@@ -9615,6 +9708,8 @@ static const struct hci_mgmt_handler tizen_mgmt_handlers[] = {
 				   MGMT_LE_WRITE_HOST_SUGGESTED_DATA_LENGTH_SIZE },
 	{ read_host_suggested_data_length,
 				   MGMT_LE_READ_HOST_SUGGESTED_DATA_LENGTH_SIZE },
+	{ set_le_data_length_params,
+				   MGMT_LE_SET_DATA_LENGTH_SIZE },
 };
 #endif