[PATCH v4 03/13] Bluetooth: Implement Set PHY Confguration command

[Jaganath Kanakkassery <jaganath.k.os@gmail.com>]

This enables user to set phys which will be used in all subsequent
connections. Also host will use the same in LE scanning as well.

This patch also implements PHY Changed event which will be
triggered whenever default PHYs change.

This also adds PHY_CONFIGURATION to mgmt settings which set
in the supported settings if controller supports 2/3 slot
or 2M/#M in BREDR controller and 2M or CODED in case of LE
and set in current settings if any of them is selected

@ MGMT Command: Set PHY Configuration (0x0045) plen 4
        Selected PHYs: 0x7fff
          BR 1M 1SLOT
          BR 1M 3SLOT
          BR 1M 5SLOT
          EDR 2M 1SLOT
          EDR 2M 3SLOT
          EDR 2M 5SLOT
          EDR 3M 1SLOT
          EDR 3M 3SLOT
          EDR 3M 5SLOT
          LE 1M TX
          LE 1M RX
          LE 2M TX
          LE 2M RX
          LE CODED TX
          LE CODED RX
< HCI Command: LE Set Default PHY (0x08|0x0031) plen 3
        All PHYs preference: 0x00
        TX PHYs preference: 0x07
          LE 1M
          LE 2M
          LE Coded
        RX PHYs preference: 0x07
          LE 1M
          LE 2M
          LE Coded
> HCI Event: Command Complete (0x0e) plen 4
      LE Set Default PHY (0x08|0x0031) ncmd 1
        Status: Success (0x00)
@ MGMT Event: Command Complete (0x0001) plen 3
      Set PHY Configuration (0x0045) plen 0
        Status: Success (0x00)
@ MGMT Event: PHY Configuration Changed (0x0026) plen 4
        Selected PHYs: 0x7fff
          BR 1M 1SLOT
          BR 1M 3SLOT
          BR 1M 5SLOT
          EDR 2M 1SLOT
          EDR 2M 3SLOT
          EDR 2M 5SLOT
          EDR 3M 1SLOT
          EDR 3M 3SLOT
          EDR 3M 5SLOT
          LE 1M TX
          LE 1M RX
          LE 2M TX
          LE 2M RX
          LE CODED TX
          LE CODED RX

Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>
---
 include/net/bluetooth/hci.h      |   1 +
 include/net/bluetooth/hci_core.h |   1 +
 include/net/bluetooth/mgmt.h     |  25 +++++
 net/bluetooth/hci_core.c         |   4 +
 net/bluetooth/hci_event.c        |  26 +++++
 net/bluetooth/hci_sock.c         |   1 +
 net/bluetooth/mgmt.c             | 221 +++++++++++++++++++++++++++++++++++++++
 7 files changed, 279 insertions(+)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 89bf800..d0f7657 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -214,6 +214,7 @@ enum {
 	HCI_MGMT_DEV_CLASS_EVENTS,
 	HCI_MGMT_LOCAL_NAME_EVENTS,
 	HCI_MGMT_OOB_DATA_EVENTS,
+	HCI_MGMT_PHY_CHANGED_EVENTS,
 };
 
 /*
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index a64d13f..ab5d494 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1544,6 +1544,7 @@ void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
 			    u8 instance);
 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
 			      u8 instance);
+int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
 
 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
 		      u16 to_multiplier);
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 16dddb1..047e98d 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -101,6 +101,7 @@ struct mgmt_rp_read_index_list {
 #define MGMT_SETTING_PRIVACY		0x00002000
 #define MGMT_SETTING_CONFIGURATION	0x00004000
 #define MGMT_SETTING_STATIC_ADDRESS	0x00008000
+#define MGMT_SETTING_PHY_CONFIGURATION  0x00010000
 
 #define MGMT_OP_READ_INFO		0x0004
 #define MGMT_READ_INFO_SIZE		0
@@ -628,6 +629,25 @@ struct mgmt_rp_get_phy_confguration {
 #define MGMT_PHY_LE_CODED_TX	0x00002000
 #define MGMT_PHY_LE_CODED_RX	0x00004000
 
+#define MGMT_PHY_BREDR_MASK (MGMT_PHY_BR_1M_1SLOT | MGMT_PHY_BR_1M_3SLOT | \
+				MGMT_PHY_BR_1M_5SLOT | MGMT_PHY_EDR_2M_1SLOT | \
+				MGMT_PHY_EDR_2M_3SLOT | MGMT_PHY_EDR_2M_5SLOT | \
+				MGMT_PHY_EDR_3M_1SLOT | MGMT_PHY_EDR_3M_3SLOT | \
+				MGMT_PHY_EDR_3M_5SLOT)
+#define MGMT_PHY_LE_MASK (MGMT_PHY_LE_1M_TX | MGMT_PHY_LE_1M_RX | \
+				MGMT_PHY_LE_2M_TX | MGMT_PHY_LE_2M_RX | \
+				MGMT_PHY_LE_CODED_TX | MGMT_PHY_LE_CODED_RX)
+#define MGMT_PHY_LE_TX_MASK (MGMT_PHY_LE_1M_TX | MGMT_PHY_LE_2M_TX | \
+			     MGMT_PHY_LE_CODED_TX)
+#define MGMT_PHY_LE_RX_MASK (MGMT_PHY_LE_1M_RX | MGMT_PHY_LE_2M_RX | \
+			     MGMT_PHY_LE_CODED_RX)
+
+#define MGMT_OP_SET_PHY_CONFIGURATION	0x0045
+#define MGMT_SET_PHY_CONFIGURATION_SIZE		4
+struct mgmt_cp_set_phy_confguration {
+	__le32	selected_phys;
+} __packed;
+
 #define MGMT_EV_CMD_COMPLETE		0x0001
 struct mgmt_ev_cmd_complete {
 	__le16	opcode;
@@ -848,3 +868,8 @@ struct mgmt_ev_ext_info_changed {
 	__le16	eir_len;
 	__u8	eir[0];
 } __packed;
+
+#define MGMT_EV_PHY_CONFIGURATION_CHANGED	0x0026
+struct mgmt_ev_phy_configuration_changed {
+	__le32	selected_phys;
+} __packed;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 432f89f..0d88dc9 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1924,7 +1924,11 @@ int hci_dev_cmd(unsigned int cmd, void __user *arg)
 		break;
 
 	case HCISETPTYPE:
+		if (hdev->pkt_type == ((__u16) dr.dev_opt))
+			break;
+
 		hdev->pkt_type = (__u16) dr.dev_opt;
+		mgmt_phy_configuration_changed(hdev, NULL);
 		break;
 
 	case HCISETACLMTU:
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 6819215..6942315 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1042,6 +1042,28 @@ static void hci_cc_le_set_random_addr(struct hci_dev *hdev, struct sk_buff *skb)
 	hci_dev_unlock(hdev);
 }
 
+static void hci_cc_le_set_default_phy(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	__u8 status = *((__u8 *) skb->data);
+	struct hci_cp_le_set_default_phy *cp;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+	if (status)
+		return;
+
+	cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
+	if (!cp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	hdev->le_tx_def_phys = cp->tx_phys;
+	hdev->le_rx_def_phys = cp->rx_phys;
+
+	hci_dev_unlock(hdev);
+}
+
 static void hci_cc_le_set_adv_enable(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	__u8 *sent, status = *((__u8 *) skb->data);
@@ -3163,6 +3185,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
 		hci_cc_le_set_ext_scan_enable(hdev, skb);
 		break;
 
+	case HCI_OP_LE_SET_DEFAULT_PHY:
+		hci_cc_le_set_default_phy(hdev, skb);
+		break;
+
 	default:
 		BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
 		break;
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 1506e16..476916c 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -1328,6 +1328,7 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
 			hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
 			hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
 			hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_PHY_CHANGED_EVENTS);
 		}
 		break;
 	}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 4a31d4d..1c2ed42 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -737,6 +737,23 @@ static u32 get_configurable_phys(struct hci_dev *hdev)
 			~MGMT_PHY_LE_1M_TX & ~MGMT_PHY_LE_1M_RX);
 }
 
+static bool phys_configured(struct hci_dev *hdev)
+{
+	u32 selected_phys = get_selected_phys(hdev);
+	u32 supported_phys = get_supported_phys(hdev);
+
+	/* If any of BREDR supported PHYs are deselected or
+	 *  LE PHYs other than 1M are selected
+	 */
+	if (((supported_phys & MGMT_PHY_BREDR_MASK) !=
+		 (selected_phys & MGMT_PHY_BREDR_MASK)) ||
+		((selected_phys & MGMT_PHY_LE_MASK) &
+		  ~(MGMT_PHY_LE_1M_TX | MGMT_PHY_LE_1M_RX)))
+		return true;
+
+	return false;
+}
+
 static u32 get_supported_settings(struct hci_dev *hdev)
 {
 	u32 settings = 0;
@@ -3332,6 +3349,209 @@ static int get_phy_configuration(struct sock *sk, struct hci_dev *hdev,
 				 &rp, sizeof(rp));
 }
 
+int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip)
+{
+	struct mgmt_ev_phy_configuration_changed ev;
+
+	memset(&ev, 0, sizeof(ev));
+
+	ev.selected_phys = cpu_to_le32(get_selected_phys(hdev));
+
+	return mgmt_limited_event(MGMT_EV_PHY_CONFIGURATION_CHANGED, hdev, &ev,
+				  sizeof(ev), HCI_MGMT_PHY_CHANGED_EVENTS,
+				  skip);
+}
+
+static void set_default_phy_complete(struct hci_dev *hdev, u8 status,
+				     u16 opcode, struct sk_buff *skb)
+{
+	struct mgmt_cp_set_phy_confguration *cp;
+	struct mgmt_pending_cmd *cmd;
+
+	BT_DBG("status 0x%02x", status);
+
+	hci_dev_lock(hdev);
+
+	cmd = pending_find(MGMT_OP_SET_PHY_CONFIGURATION, hdev);
+	if (!cmd)
+		goto unlock;
+
+	cp = cmd->param;
+
+	if (status) {
+		mgmt_cmd_status(cmd->sk, hdev->id,
+				MGMT_OP_SET_PHY_CONFIGURATION,
+				mgmt_status(status));
+	} else {
+		mgmt_cmd_complete(cmd->sk, hdev->id,
+				  MGMT_OP_SET_PHY_CONFIGURATION, 0,
+				  NULL, 0);
+
+		mgmt_phy_configuration_changed(hdev, cmd->sk);
+		new_settings(hdev, cmd->sk);
+	}
+
+	mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+}
+
+static int set_phy_configuration(struct sock *sk, struct hci_dev *hdev,
+				 void *data, u16 len)
+{
+	struct mgmt_cp_set_phy_confguration *cp = data;
+	struct hci_cp_le_set_default_phy cp_phy;
+	struct mgmt_pending_cmd *cmd;
+	struct hci_request req;
+	u32 selected_phys, configurable_phys, supported_phys, unconfigure_phys;
+	u16 pkt_type = (HCI_DH1 | HCI_DM1);
+	bool changed = false;
+	int err;
+
+	BT_DBG("sock %p %s", sk, hdev->name);
+
+	configurable_phys = get_configurable_phys(hdev);
+	supported_phys = get_supported_phys(hdev);
+	selected_phys = __le32_to_cpu(cp->selected_phys);
+
+	if (selected_phys & ~supported_phys)
+		return mgmt_cmd_status(sk, hdev->id,
+				       MGMT_OP_SET_PHY_CONFIGURATION,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	unconfigure_phys = supported_phys & ~configurable_phys;
+
+	if ((selected_phys & unconfigure_phys) != unconfigure_phys)
+		return mgmt_cmd_status(sk, hdev->id,
+				       MGMT_OP_SET_PHY_CONFIGURATION,
+				       MGMT_STATUS_INVALID_PARAMS);
+
+	if (selected_phys == get_selected_phys(hdev))
+		return mgmt_cmd_complete(sk, hdev->id,
+					 MGMT_OP_SET_PHY_CONFIGURATION,
+					 0, NULL, 0);
+
+	hci_dev_lock(hdev);
+
+	if (!hdev_is_powered(hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_SET_PHY_CONFIGURATION,
+				      MGMT_STATUS_REJECTED);
+		goto unlock;
+	}
+
+	if (pending_find(MGMT_OP_SET_PHY_CONFIGURATION, hdev)) {
+		err = mgmt_cmd_status(sk, hdev->id,
+				      MGMT_OP_SET_PHY_CONFIGURATION,
+				      MGMT_STATUS_BUSY);
+		goto unlock;
+	}
+
+	if (selected_phys & MGMT_PHY_BR_1M_3SLOT)
+		pkt_type |= (HCI_DH3 | HCI_DM3);
+	else
+		pkt_type &= ~(HCI_DH3 | HCI_DM3);
+
+	if (selected_phys & MGMT_PHY_BR_1M_5SLOT)
+		pkt_type |= (HCI_DH5 | HCI_DM5);
+	else
+		pkt_type &= ~(HCI_DH5 | HCI_DM5);
+
+	if (selected_phys & MGMT_PHY_EDR_2M_1SLOT)
+		pkt_type &= ~HCI_2DH1;
+	else
+		pkt_type |= HCI_2DH1;
+
+	if (selected_phys & MGMT_PHY_EDR_2M_3SLOT)
+		pkt_type &= ~HCI_2DH3;
+	else
+		pkt_type |= HCI_2DH3;
+
+	if (selected_phys & MGMT_PHY_EDR_2M_5SLOT)
+		pkt_type &= ~HCI_2DH5;
+	else
+		pkt_type |= HCI_2DH5;
+
+	if (selected_phys & MGMT_PHY_EDR_3M_1SLOT)
+		pkt_type &= ~HCI_3DH1;
+	else
+		pkt_type |= HCI_3DH1;
+
+	if (selected_phys & MGMT_PHY_EDR_3M_3SLOT)
+		pkt_type &= ~HCI_3DH3;
+	else
+		pkt_type |= HCI_3DH3;
+
+	if (selected_phys & MGMT_PHY_EDR_3M_5SLOT)
+		pkt_type &= ~HCI_3DH5;
+	else
+		pkt_type |= HCI_3DH5;
+
+	if (pkt_type != hdev->pkt_type) {
+		hdev->pkt_type = pkt_type;
+		changed = true;
+	}
+
+	if ((selected_phys & MGMT_PHY_LE_MASK) ==
+		(get_selected_phys(hdev) & MGMT_PHY_LE_MASK)) {
+		if (changed)
+			mgmt_phy_configuration_changed(hdev, sk);
+
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_SET_PHY_CONFIGURATION,
+					0, NULL, 0);
+
+		goto unlock;
+	}
+
+	cmd = mgmt_pending_add(sk, MGMT_OP_SET_PHY_CONFIGURATION, hdev, data,
+			       len);
+	if (!cmd) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	hci_req_init(&req, hdev);
+
+	memset(&cp_phy, 0, sizeof(cp_phy));
+
+	if (!(selected_phys & MGMT_PHY_LE_TX_MASK))
+		cp_phy.all_phys |= 0x01;
+
+	if (!(selected_phys & MGMT_PHY_LE_RX_MASK))
+		cp_phy.all_phys |= 0x02;
+
+	if (selected_phys & MGMT_PHY_LE_1M_TX)
+		cp_phy.tx_phys |= HCI_LE_SET_PHY_1M;
+
+	if (selected_phys & MGMT_PHY_LE_2M_TX)
+		cp_phy.tx_phys |= HCI_LE_SET_PHY_2M;
+
+	if (selected_phys & MGMT_PHY_LE_CODED_TX)
+		cp_phy.tx_phys |= HCI_LE_SET_PHY_CODED;
+
+	if (selected_phys & MGMT_PHY_LE_1M_RX)
+		cp_phy.rx_phys |= HCI_LE_SET_PHY_1M;
+
+	if (selected_phys & MGMT_PHY_LE_2M_RX)
+		cp_phy.rx_phys |= HCI_LE_SET_PHY_2M;
+
+	if (selected_phys & MGMT_PHY_LE_CODED_RX)
+		cp_phy.rx_phys |= HCI_LE_SET_PHY_CODED;
+
+	hci_req_add(&req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp_phy), &cp_phy);
+
+	err = hci_req_run_skb(&req, set_default_phy_complete);
+	if (err < 0)
+		mgmt_pending_remove(cmd);
+
+unlock:
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
 static void read_local_oob_data_complete(struct hci_dev *hdev, u8 status,
 				         u16 opcode, struct sk_buff *skb)
 {
@@ -6693,6 +6913,7 @@ static const struct hci_mgmt_handler mgmt_handlers[] = {
 						HCI_MGMT_UNTRUSTED },
 	{ set_appearance,	   MGMT_SET_APPEARANCE_SIZE },
 	{ get_phy_configuration,   MGMT_GET_PHY_CONFIGURATION_SIZE },
+	{ set_phy_configuration,   MGMT_SET_PHY_CONFIGURATION_SIZE },
 };
 
 void mgmt_index_added(struct hci_dev *hdev)
-- 
2.7.4