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Bluetooth: Add debugfs controls for LE CoC MPS and Credits

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This patch adds entries to debugfs to control the values used for the
MPS and Credits for LE Flow Control Mode.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2013-12-03 15:08:25 +02:00 committed by Marcel Holtmann
parent 4946096d43
commit f15b8ecf98
1 changed files with 12 additions and 4 deletions
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16
net/bluetooth/l2cap_core.c
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@ -49,6 +49,9 @@ static u8 l2cap_fixed_chan[8] = { L2CAP_FC_L2CAP | L2CAP_FC_CONNLESS, };
static LIST_HEAD(chan_list);
static DEFINE_RWLOCK(chan_list_lock);
static u16 le_max_credits = L2CAP_LE_MAX_CREDITS;
static u16 le_default_mps = L2CAP_LE_DEFAULT_MPS;
static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
u8 code, u8 ident, u16 dlen, void *data);
static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
@ -501,7 +504,7 @@ void l2cap_le_flowctl_init(struct l2cap_chan *chan)
chan->omtu = L2CAP_LE_MIN_MTU;
chan->mode = L2CAP_MODE_LE_FLOWCTL;
chan->tx_credits = 0;
chan->rx_credits = L2CAP_LE_MAX_CREDITS;
chan->rx_credits = le_max_credits;
if (chan->imtu < L2CAP_LE_DEFAULT_MPS)
chan->mps = chan->imtu;
@ -1214,7 +1217,7 @@ static void l2cap_le_flowctl_start(struct l2cap_chan *chan)
if (chan->imtu < L2CAP_LE_DEFAULT_MPS)
chan->mps = chan->imtu;
else
chan->mps = L2CAP_LE_DEFAULT_MPS;
chan->mps = le_default_mps;
skb_queue_head_init(&chan->tx_q);
@ -6831,10 +6834,10 @@ static void l2cap_chan_le_send_credits(struct l2cap_chan *chan)
/* We return more credits to the sender only after the amount of
* credits falls below half of the initial amount.
*/
if (chan->rx_credits >= (L2CAP_LE_MAX_CREDITS + 1) / 2)
if (chan->rx_credits >= (le_max_credits + 1) / 2)
return;
return_credits = L2CAP_LE_MAX_CREDITS - chan->rx_credits;
return_credits = le_max_credits - chan->rx_credits;
BT_DBG("chan %p returning %u credits to sender", chan, return_credits);
@ -7448,6 +7451,11 @@ int __init l2cap_init(void)
l2cap_debugfs = debugfs_create_file("l2cap", 0444, bt_debugfs,
NULL, &l2cap_debugfs_fops);
debugfs_create_u16("l2cap_le_max_credits", 0466, bt_debugfs,
&le_max_credits);
debugfs_create_u16("l2cap_le_default_mps", 0466, bt_debugfs,
&le_default_mps);
return 0;
}