Cache the codec information in the driver and this data can
be exposed to user space audio modules via getsockopt
Signed-off-by: Kiran K <kiran.k@xxxxxxxxx>
Signed-off-by: Chethan T N <chethan.tumkur.narayan@xxxxxxxxx>
Signed-off-by: Srivatsa Ravishankar <ravishankar.srivatsa@xxxxxxxxx>
---
* changes in v3
remove unwanted log
* changes in v2
add skb length check before accessing data
include/net/bluetooth/hci.h | 11 +++++++++++
include/net/bluetooth/hci_core.h | 13 +++++++++++++
net/bluetooth/hci_core.c | 31 +++++++++++++++++++++++++++++++
net/bluetooth/hci_event.c | 32 ++++++++++++++++++++++++++++++++
4 files changed, 87 insertions(+)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 34eb9f4b027f..6b4344639ff7 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1323,6 +1323,17 @@ struct hci_op_read_local_codec_caps {
__u8 direction;
} __packed;
+struct hci_codec_caps {
+ __u8 len;
+ __u8 caps[];
+} __packed;
+
+struct hci_rp_read_local_codec_caps {
+ __u8 status;
+ __u8 num_caps;
+ struct hci_codec_caps caps[];
+} __packed;
+
#define HCI_OP_READ_PAGE_SCAN_ACTIVITY 0x0c1b
struct hci_rp_read_page_scan_activity {
__u8 status;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 2c19b02a805d..b40c7ed38d18 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -131,6 +131,14 @@ struct bdaddr_list {
u8 bdaddr_type;
};
+struct codec_list {
+ struct list_head list;
+ u8 transport;
+ u8 codec_id[5];
+ u8 num_caps;
+ struct hci_codec_caps caps[];
+};
+
struct bdaddr_list_with_irk {
struct list_head list;
bdaddr_t bdaddr;
@@ -534,6 +542,7 @@ struct hci_dev {
struct list_head pend_le_conns;
struct list_head pend_le_reports;
struct list_head blocked_keys;
+ struct list_head local_codecs;
struct hci_dev_stats stat;
@@ -1843,6 +1852,10 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
u8 *bdaddr_type);
+int hci_codec_list_add(struct list_head *list, struct hci_rp_read_local_codec_caps *rp,
+ __u32 len,
+ struct hci_op_read_local_codec_caps *sent);
+void hci_codec_list_clear(struct list_head *codec_list);
#define SCO_AIRMODE_MASK 0x0003
#define SCO_AIRMODE_CVSD 0x0000
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index fda7077d0d47..17dc342f4486 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3569,6 +3569,35 @@ void hci_conn_params_clear_disabled(struct hci_dev *hdev)
BT_DBG("All LE disabled connection parameters were removed");
}
+int hci_codec_list_add(struct list_head *list, struct hci_rp_read_local_codec_caps *rp,
+ __u32 len,
+ struct hci_op_read_local_codec_caps *sent)
+{
+ struct codec_list *entry;
+
+ entry = kzalloc(sizeof(*entry) + len, GFP_KERNEL);
+ if (!entry)
+ return -ENOMEM;
+
+ memcpy(entry->codec_id, sent->codec_id, 5);
+ entry->transport = sent->transport;
+ entry->num_caps = rp->num_caps;
+ if (rp->num_caps)
+ memcpy(entry->caps, rp->caps, len);
+ list_add(&entry->list, list);
+
+ return 0;
+}
+
+void hci_codec_list_clear(struct list_head *codec_list)
+{
+ struct codec_list *c, *n;
+
+ list_for_each_entry_safe(c, n, codec_list, list) {
+ list_del(&c->list);
+ kfree(c);
+ }
+}
/* This function requires the caller holds hdev->lock */
static void hci_conn_params_clear_all(struct hci_dev *hdev)
{
@@ -3828,6 +3857,7 @@ struct hci_dev *hci_alloc_dev(void)
INIT_LIST_HEAD(&hdev->conn_hash.list);
INIT_LIST_HEAD(&hdev->adv_instances);
INIT_LIST_HEAD(&hdev->blocked_keys);
+ INIT_LIST_HEAD(&hdev->local_codecs);
INIT_WORK(&hdev->rx_work, hci_rx_work);
INIT_WORK(&hdev->cmd_work, hci_cmd_work);
@@ -4046,6 +4076,7 @@ void hci_unregister_dev(struct hci_dev *hdev)
hci_conn_params_clear_all(hdev);
hci_discovery_filter_clear(hdev);
hci_blocked_keys_clear(hdev);
+ hci_codec_list_clear(&hdev->local_codecs);
hci_dev_unlock(hdev);
hci_dev_put(hdev);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 7ca3535f30de..b55cd02abd02 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1057,6 +1057,34 @@ static void hci_cc_read_local_codecs_v2(struct hci_dev *hdev,
}
}
+static void hci_cc_read_local_codec_caps(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ struct hci_op_read_local_codec_caps *sent;
+ struct hci_rp_read_local_codec_caps *rp;
+
+ if (skb->len < sizeof(*rp))
+ return;
+
+ rp = (void *)skb->data;
+
+ bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
+
+ if (rp->status)
+ return;
+
+ sent = hci_sent_cmd_data(hdev, HCI_OP_READ_LOCAL_CODEC_CAPS);
+
+ if (!sent)
+ return;
+
+ hci_dev_lock(hdev);
+
+ hci_codec_list_add(&hdev->local_codecs, rp, skb->len - 2, sent);
+
+ hci_dev_unlock(hdev);
+}
+
static void hci_cc_read_clock(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_rp_read_clock *rp = (void *) skb->data;
@@ -3615,6 +3643,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
hci_cc_read_local_codecs_v2(hdev, skb);
break;
+ case HCI_OP_READ_LOCAL_CODEC_CAPS:
+ hci_cc_read_local_codec_caps(hdev, skb);
+ break;
+
case HCI_OP_READ_FLOW_CONTROL_MODE:
hci_cc_read_flow_control_mode(hdev, skb);
break;
--
2.17.1
