From f15b8ecf9895941ef50134ff604be8bd2c6b1b78 Mon Sep 17 00:00:00 2001 From: Johan Hedberg Date: Tue, 3 Dec 2013 15:08:25 +0200 Subject: [PATCH] Bluetooth: Add debugfs controls for LE CoC MPS and Credits 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 Signed-off-by: Marcel Holtmann --- net/bluetooth/l2cap_core.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 5941c65728b2..8e9e883874ce 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -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; } -- 2.30.2