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Bluetooth: Use LE buffers for LE traffic

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Bluetooth chips may have separate buffers for LE traffic.
This patch add support to use LE buffers provided by the chip.

Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Ville Tervo
2011-02-10 22:38:48 -03:00
committed by Gustavo F. Padovan
parent fcd89c09a5
commit 6ed58ec520
4 changed files with 113 additions and 4 deletions
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74
net/bluetooth/hci_core.c
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@@ -263,6 +263,14 @@ static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
}
static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
{
BT_DBG("%s", hdev->name);
/* Read LE buffer size */
hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
}
static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
{
__u8 scan = opt;
@@ -529,6 +537,10 @@ int hci_dev_open(__u16 dev)
ret = __hci_request(hdev, hci_init_req, 0,
msecs_to_jiffies(HCI_INIT_TIMEOUT));
if (lmp_le_capable(hdev))
ret = __hci_request(hdev, hci_le_init_req, 0,
msecs_to_jiffies(HCI_INIT_TIMEOUT));
clear_bit(HCI_INIT, &hdev->flags);
}
@@ -671,7 +683,7 @@ int hci_dev_reset(__u16 dev)
hdev->flush(hdev);
atomic_set(&hdev->cmd_cnt, 1);
hdev->acl_cnt = 0; hdev->sco_cnt = 0;
hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
if (!test_bit(HCI_RAW, &hdev->flags))
ret = __hci_request(hdev, hci_reset_req, 0,
@@ -1672,8 +1684,25 @@ static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int
}
if (conn) {
int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt);
int q = cnt / num;
int cnt, q;
switch (conn->type) {
case ACL_LINK:
cnt = hdev->acl_cnt;
break;
case SCO_LINK:
case ESCO_LINK:
cnt = hdev->sco_cnt;
break;
case LE_LINK:
cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
break;
default:
cnt = 0;
BT_ERR("Unknown link type");
}
q = cnt / num;
*quote = q ? q : 1;
} else
*quote = 0;
@@ -1772,6 +1801,40 @@ static inline void hci_sched_esco(struct hci_dev *hdev)
}
}
static inline void hci_sched_le(struct hci_dev *hdev)
{
struct hci_conn *conn;
struct sk_buff *skb;
int quote, cnt;
BT_DBG("%s", hdev->name);
if (!test_bit(HCI_RAW, &hdev->flags)) {
/* LE tx timeout must be longer than maximum
* link supervision timeout (40.9 seconds) */
if (!hdev->le_cnt &&
time_after(jiffies, hdev->le_last_tx + HZ * 45))
hci_acl_tx_to(hdev);
}
cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
while (cnt && (conn = hci_low_sent(hdev, LE_LINK, &quote))) {
while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
BT_DBG("skb %p len %d", skb, skb->len);
hci_send_frame(skb);
hdev->le_last_tx = jiffies;
cnt--;
conn->sent++;
}
}
if (hdev->le_pkts)
hdev->le_cnt = cnt;
else
hdev->acl_cnt = cnt;
}
static void hci_tx_task(unsigned long arg)
{
struct hci_dev *hdev = (struct hci_dev *) arg;
@@ -1779,7 +1842,8 @@ static void hci_tx_task(unsigned long arg)
read_lock(&hci_task_lock);
BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt);
BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
hdev->sco_cnt, hdev->le_cnt);
/* Schedule queues and send stuff to HCI driver */
@@ -1789,6 +1853,8 @@ static void hci_tx_task(unsigned long arg)
hci_sched_esco(hdev);
hci_sched_le(hdev);
/* Send next queued raw (unknown type) packet */
while ((skb = skb_dequeue(&hdev->raw_q)))
hci_send_frame(skb);