by Jaganath K

[permalink] [raw]

Subject: [PATCH v1 01/11] Bluetooth: Introduce helpers for LE set scan start and complete

Introduce a helper hci_req_start_scan() which starts an LE
scan and call it from passive_Scan() and active_scan().
There is not functionality change in this patch.

This is basically done to enable extended scanning if the
controller supports which will be done in the subsequent
patch

Signed-off-by: Jaganath Kanakkassery <[email protected]>
---
net/bluetooth/hci_event.c | 37 ++++++++++++++++-------------
net/bluetooth/hci_request.c | 58 +++++++++++++++++++--------------------------
2 files changed, 46 insertions(+), 49 deletions(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index cd3bbb7..e034ced 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1126,24 +1126,11 @@ static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
d->last_adv_data_len = len;
}

-static void hci_cc_le_set_scan_enable(struct hci_dev *hdev,
- struct sk_buff *skb)
+static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
{
- struct hci_cp_le_set_scan_enable *cp;
- __u8 status = *((__u8 *) skb->data);
-
- BT_DBG("%s status 0x%2.2x", hdev->name, status);
-
- if (status)
- return;
-
- cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
- if (!cp)
- return;
-
hci_dev_lock(hdev);

- switch (cp->enable) {
+ switch (enable) {
case LE_SCAN_ENABLE:
hci_dev_set_flag(hdev, HCI_LE_SCAN);
if (hdev->le_scan_type == LE_SCAN_ACTIVE)
@@ -1189,13 +1176,31 @@ static void hci_cc_le_set_scan_enable(struct hci_dev *hdev,

default:
bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
- cp->enable);
+ enable);
break;
}

hci_dev_unlock(hdev);
}

+static void hci_cc_le_set_scan_enable(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ struct hci_cp_le_set_scan_enable *cp;
+ __u8 status = *((__u8 *) skb->data);
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+ if (status)
+ return;
+
+ cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
+ if (!cp)
+ return;
+
+ le_set_scan_enable_complete(hdev, cp->enable);
+}
+
static void hci_cc_le_read_white_list_size(struct hci_dev *hdev,
struct sk_buff *skb)
{
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 66c0781..d9d07c4 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -783,10 +783,30 @@ static bool scan_use_rpa(struct hci_dev *hdev)
return hci_dev_test_flag(hdev, HCI_PRIVACY);
}

-void hci_req_add_le_passive_scan(struct hci_request *req)
+static void hci_req_start_scan(struct hci_request *req, u8 type, u16 interval,
+ u16 window, u8 own_addr_type, u8 filter_policy)
{
struct hci_cp_le_set_scan_param param_cp;
struct hci_cp_le_set_scan_enable enable_cp;
+
+ memset(&param_cp, 0, sizeof(param_cp));
+ param_cp.type = type;
+ param_cp.interval = cpu_to_le16(interval);
+ param_cp.window = cpu_to_le16(window);
+ param_cp.own_address_type = own_addr_type;
+ param_cp.filter_policy = filter_policy;
+ hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
+ &param_cp);
+
+ memset(&enable_cp, 0, sizeof(enable_cp));
+ enable_cp.enable = LE_SCAN_ENABLE;
+ enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
+ hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
+ &enable_cp);
+}
+
+void hci_req_add_le_passive_scan(struct hci_request *req)
+{
struct hci_dev *hdev = req->hdev;
u8 own_addr_type;
u8 filter_policy;
@@ -820,20 +840,8 @@ void hci_req_add_le_passive_scan(struct hci_request *req)
(hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
filter_policy |= 0x02;

- memset(&param_cp, 0, sizeof(param_cp));
- param_cp.type = LE_SCAN_PASSIVE;
- param_cp.interval = cpu_to_le16(hdev->le_scan_interval);
- param_cp.window = cpu_to_le16(hdev->le_scan_window);
- param_cp.own_address_type = own_addr_type;
- param_cp.filter_policy = filter_policy;
- hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
- &param_cp);
-
- memset(&enable_cp, 0, sizeof(enable_cp));
- enable_cp.enable = LE_SCAN_ENABLE;
- enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
- hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
- &enable_cp);
+ hci_req_start_scan(req, LE_SCAN_PASSIVE, hdev->le_scan_interval,
+ hdev->le_scan_window, own_addr_type, filter_policy);
}

static u8 get_cur_adv_instance_scan_rsp_len(struct hci_dev *hdev)
@@ -2026,8 +2034,6 @@ static int active_scan(struct hci_request *req, unsigned long opt)
{
uint16_t interval = opt;
struct hci_dev *hdev = req->hdev;
- struct hci_cp_le_set_scan_param param_cp;
- struct hci_cp_le_set_scan_enable enable_cp;
u8 own_addr_type;
int err;

@@ -2066,22 +2072,8 @@ static int active_scan(struct hci_request *req, unsigned long opt)
if (err < 0)
own_addr_type = ADDR_LE_DEV_PUBLIC;

- memset(&param_cp, 0, sizeof(param_cp));
- param_cp.type = LE_SCAN_ACTIVE;
- param_cp.interval = cpu_to_le16(interval);
- param_cp.window = cpu_to_le16(DISCOV_LE_SCAN_WIN);
- param_cp.own_address_type = own_addr_type;
-
- hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
- &param_cp);
-
- memset(&enable_cp, 0, sizeof(enable_cp));
- enable_cp.enable = LE_SCAN_ENABLE;
- enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
-
- hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
- &enable_cp);
-
+ hci_req_start_scan(req, LE_SCAN_ACTIVE, interval, DISCOV_LE_SCAN_WIN,
+ own_addr_type, 0);
return 0;
}

--
2.7.4