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Bluetooth: Recalculate sched HCI blk/pkt flow ctrl 

Split HCI scheduling for block and packet flow control.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Andrei Emeltchenko 2012-02-03 16:27:54 +02:00 committed by Johan Hedberg
parent 261cc5aa9e
commit b71d385a18
1 changed files with 79 additions and 6 deletions
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85
net/bluetooth/hci_core.c
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@ -2384,18 +2384,19 @@ static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
} }
static inline void hci_sched_acl(struct hci_dev *hdev) static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
{
/* Calculate count of blocks used by this packet */
return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
}
static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
{ {
struct hci_chan *chan; struct hci_chan *chan;
struct sk_buff *skb; struct sk_buff *skb;
int quote; int quote;
unsigned int cnt; unsigned int cnt;
BT_DBG("%s", hdev->name);
if (!hci_conn_num(hdev, ACL_LINK))
return;
if (!test_bit(HCI_RAW, &hdev->flags)) { if (!test_bit(HCI_RAW, &hdev->flags)) {
/* ACL tx timeout must be longer than maximum /* ACL tx timeout must be longer than maximum
* link supervision timeout (40.9 seconds) */ * link supervision timeout (40.9 seconds) */
@ -2435,6 +2436,78 @@ static inline void hci_sched_acl(struct hci_dev *hdev)
hci_prio_recalculate(hdev, ACL_LINK); hci_prio_recalculate(hdev, ACL_LINK);
} }
static inline void hci_sched_acl_blk(struct hci_dev *hdev)
{
struct hci_chan *chan;
struct sk_buff *skb;
int quote;
unsigned int cnt;
if (!test_bit(HCI_RAW, &hdev->flags)) {
/* ACL tx timeout must be longer than maximum
* link supervision timeout (40.9 seconds) */
if (!hdev->block_cnt && time_after(jiffies, hdev->acl_last_tx +
msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
hci_link_tx_to(hdev, ACL_LINK);
}
cnt = hdev->block_cnt;
while (hdev->block_cnt > 0 &&
(chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
u32 priority = (skb_peek(&chan->data_q))->priority;
while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
int blocks;
BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
skb->len, skb->priority);
/* Stop if priority has changed */
if (skb->priority < priority)
break;
skb = skb_dequeue(&chan->data_q);
blocks = __get_blocks(hdev, skb);
if (blocks > hdev->block_cnt)
return;
hci_conn_enter_active_mode(chan->conn,
bt_cb(skb)->force_active);
hci_send_frame(skb);
hdev->acl_last_tx = jiffies;
hdev->block_cnt -= blocks;
quote -= blocks;
chan->sent += blocks;
chan->conn->sent += blocks;
}
}
if (cnt != hdev->block_cnt)
hci_prio_recalculate(hdev, ACL_LINK);
}
static inline void hci_sched_acl(struct hci_dev *hdev)
{
BT_DBG("%s", hdev->name);
if (!hci_conn_num(hdev, ACL_LINK))
return;
switch (hdev->flow_ctl_mode) {
case HCI_FLOW_CTL_MODE_PACKET_BASED:
hci_sched_acl_pkt(hdev);
break;
case HCI_FLOW_CTL_MODE_BLOCK_BASED:
hci_sched_acl_blk(hdev);
break;
}
}
/* Schedule SCO */ /* Schedule SCO */
static inline void hci_sched_sco(struct hci_dev *hdev) static inline void hci_sched_sco(struct hci_dev *hdev)
{ {