@@ -966,6 +966,24 @@ static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
gpiod_set_value_cansleep(reset_gpio, 0);
}
+#define BT_USB_INTEL_ISODATA_HANDLE_BASE 0x900
+
+static u8 btusb_intel_classify_pkt_type(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ /*
+ * Distinguish ISO data packets form ACL data packets
+ * based on their conneciton handle value range.
+ */
+ if (hci_skb_pkt_type(skb) == HCI_ACLDATA_PKT) {
+ __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
+
+ if (hci_handle(handle) >= BT_USB_INTEL_ISODATA_HANDLE_BASE)
+ return HCI_ISODATA_PKT;
+ }
+
+ return hci_skb_pkt_type(skb);
+}
+
#define RTK_DEVCOREDUMP_CODE_MEMDUMP 0x01
#define RTK_DEVCOREDUMP_CODE_HW_ERR 0x02
#define RTK_DEVCOREDUMP_CODE_CMD_TIMEOUT 0x03
@@ -4451,6 +4469,7 @@ static int btusb_probe(struct usb_interface *intf,
/* Transport specific configuration */
hdev->send = btusb_send_frame_intel;
hdev->cmd_timeout = btusb_intel_cmd_timeout;
+ hdev->classify_pkt_type = btusb_intel_classify_pkt_type;
if (id->driver_info & BTUSB_INTEL_NO_WBS_SUPPORT)
btintel_set_flag(hdev, INTEL_ROM_LEGACY_NO_WBS_SUPPORT);
@@ -649,6 +649,7 @@ struct hci_dev {
int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
struct bt_codec *codec, __u8 *vnd_len,
__u8 **vnd_data);
+ u8 (*classify_pkt_type)(struct hci_dev *hdev, struct sk_buff *skb);
};
#define HCI_PHY_HANDLE(handle) (handle & 0xff)
@@ -2941,15 +2941,31 @@ int hci_reset_dev(struct hci_dev *hdev)
}
EXPORT_SYMBOL(hci_reset_dev);
+static u8 hci_dev_classify_pkt_type(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ if (hdev->classify_pkt_type)
+ return hdev->classify_pkt_type(hdev, skb);
+
+ return hci_skb_pkt_type(skb);
+}
+
/* Receive frame from HCI drivers */
int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
{
+ u8 dev_pkt_type;
+
if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
&& !test_bit(HCI_INIT, &hdev->flags))) {
kfree_skb(skb);
return -ENXIO;
}
+ /* Check if the driver agree with packet type classification */
+ dev_pkt_type = hci_dev_classify_pkt_type(hdev, skb);
+ if (hci_skb_pkt_type(skb) != dev_pkt_type) {
+ hci_skb_pkt_type(skb) = dev_pkt_type;
+ }
+
switch (hci_skb_pkt_type(skb)) {
case HCI_EVENT_PKT:
break;
When HCI raw sockets are opened, the Bluetooth kernel module doesn't track CIS/BIS connections. User-space applications have to identify ISO data by maintaining connection information and look up the mapping for each ACL data packet received. Besides, btsnoop log captured in kernel couldn't tell ISO data from ACL data in this case. To avoid additional lookups, this patch introduces vendor-specific packet classification for Intel BT controllers to distinguish ISO data packets from ACL data packets. Signed-off-by: Ying Hsu <yinghsu@chromium.org> --- Tested LE audio unicast recording on a ChromeOS device with Intel AX211 Changes in v2: - Adds vendor-specific packet classificaton in hci_dev. - Keeps reclassification in hci_recv_frame. drivers/bluetooth/btusb.c | 19 +++++++++++++++++++ include/net/bluetooth/hci_core.h | 1 + net/bluetooth/hci_core.c | 16 ++++++++++++++++ 3 files changed, 36 insertions(+)