When doing scan through mgmt api, some controllers can do both le and
classic scan at same time. They can be distinguished by
HCI_QUIRK_SIMULTANEOUS_DISCOVERY set.
This patch enables them to use this feature when doing dual mode scan.
Instead of doing le, then classic scan, both scans are run at once.
Signed-off-by: Jakub Pawlowski <jpawlowski@xxxxxxxxxx>
---
net/bluetooth/hci_core.c | 24 +++++++++++++++++++-----
net/bluetooth/hci_event.c | 22 ++++++++++++++++++++--
net/bluetooth/mgmt.c | 36 ++++++++++++++++++++++++++++++++----
3 files changed, 71 insertions(+), 11 deletions(-)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 750d344..773f216 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2902,12 +2902,26 @@ static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status,
hci_dev_lock(hdev);
- hci_inquiry_cache_flush(hdev);
+ if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
+ &hdev->quirks)) {
+ /* If we were running LE only scan, change discovery
+ * state. If we were running both LE and BR/EDR inquiry
+ * simultaneously, and BR/EDR inquiry is already
+ * finished, stop discovery, otherwise BR/EDR inquiry
+ * will stop discovery when finished.
+ */
+ if (!test_bit(HCI_INQUIRY, &hdev->flags))
+ hci_discovery_set_state(hdev,
+ DISCOVERY_STOPPED);
+ } else {
+ hci_inquiry_cache_flush(hdev);
- err = hci_req_run(&req, inquiry_complete);
- if (err) {
- BT_ERR("Inquiry request failed: err %d", err);
- hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+ err = hci_req_run(&req, inquiry_complete);
+ if (err) {
+ BT_ERR("Inquiry request failed: err %d", err);
+ hci_discovery_set_state(hdev,
+ DISCOVERY_STOPPED);
+ }
}
hci_dev_unlock(hdev);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index d800f0c..62f92a5 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2126,7 +2126,16 @@ static void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
goto unlock;
if (list_empty(&discov->resolve)) {
- hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+ /* When BR/EDR inquiry is active and no LE scanning is in
+ * progress, then change discovery state to indicate completion.
+ *
+ * When running LE scanning and BR/EDR inquiry simultaneously
+ * and the LE scan already finished, then change the discovery
+ * state to indicate completion.
+ */
+ if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
+ !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
+ hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
goto unlock;
}
@@ -2135,7 +2144,16 @@ static void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
e->name_state = NAME_PENDING;
hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
} else {
- hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+ /* When BR/EDR inquiry is active and no LE scanning is in
+ * progress, then change discovery state to indicate completion.
+ *
+ * When running LE scanning and BR/EDR inquiry simultaneously
+ * and the LE scan already finished, then change the discovery
+ * state to indicate completion.
+ */
+ if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
+ !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
+ hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
}
unlock:
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 84234b4..5257347 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1400,9 +1400,10 @@ static bool hci_stop_discovery(struct hci_request *req)
switch (hdev->discovery.state) {
case DISCOVERY_FINDING:
- if (test_bit(HCI_INQUIRY, &hdev->flags)) {
+ if (test_bit(HCI_INQUIRY, &hdev->flags))
hci_req_add(req, HCI_OP_INQUIRY_CANCEL, 0, NULL);
- } else {
+
+ if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
cancel_delayed_work(&hdev->le_scan_disable);
hci_req_add_le_scan_disable(req);
}
@@ -4012,6 +4013,23 @@ static bool trigger_discovery(struct hci_request *req, u8 *status)
break;
case DISCOV_TYPE_INTERLEAVED:
+ if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
+ &hdev->quirks)) {
+ /* During simultaneous discovery, we double LE scan
+ * interval. We must leave some time for the controller
+ * to do BR/EDR inquiry.
+ */
+ if (!trigger_le_scan(req,
+ cpu_to_le16(DISCOV_LE_SCAN_INT * 2),
+ status))
+ return false;
+
+ if (!trigger_bredr_inquiry(req, status))
+ return false;
+
+ return true;
+ }
+
if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
*status = MGMT_STATUS_NOT_SUPPORTED;
return false;
@@ -4021,7 +4039,6 @@ static bool trigger_discovery(struct hci_request *req, u8 *status)
case DISCOV_TYPE_LE:
if (!trigger_le_scan(req, cpu_to_le16(DISCOV_LE_SCAN_INT),
status))
- return false;
break;
default:
@@ -4066,7 +4083,18 @@ static void start_discovery_complete(struct hci_dev *hdev, u8 status,
timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
break;
case DISCOV_TYPE_INTERLEAVED:
- timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
+ /* When running simultaneous discovery, the LE scanning time
+ * should occupy the whole discovery time sine BR/EDR inquiry
+ * and LE scanning are scheduled by the controller.
+ *
+ * For interleaving discovery in comparison, BR/EDR inquiry
+ * and LE scanning are done sequentially with separate
+ * timeouts.
+ */
+ if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
+ timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
+ else
+ timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
break;
case DISCOV_TYPE_BREDR:
timeout = 0;
--
2.2.0.rc0.207.ga3a616c
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