diff options
| author | Andrei Emeltchenko <andrei.emeltchenko@intel.com> | 2012-02-03 16:27:54 +0200 |
|---|---|---|
| committer | Johan Hedberg <johan.hedberg@intel.com> | 2012-02-13 17:01:33 +0200 |
| commit | b71d385a18cd4516c62d0198c9ec37e658112f75 (patch) | |
| tree | e949e47dcf5bed04b0846433e095f857ac5758fd | |
| parent | 261cc5aa9e54aac633dcc3b6469739cb6e23e21a (diff) | |
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>
| -rw-r--r-- | net/bluetooth/hci_core.c | 85 |
1 files changed, 79 insertions, 6 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 76dc1538e321..9a56a4084482 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -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 sk_buff *skb; int quote; unsigned int cnt; - BT_DBG("%s", hdev->name); - - if (!hci_conn_num(hdev, ACL_LINK)) - return; - if (!test_bit(HCI_RAW, &hdev->flags)) { /* ACL tx timeout must be longer than maximum * 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); } +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, "e))) { + 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 */ static inline void hci_sched_sco(struct hci_dev *hdev) { |