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Bluetooth: Make Kconfig buffer sizes follow MTU sizes

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It's more intuitive to specify needed MTU sizes instead of raw buffer
sizes. The exact buffer size calculations can instead be made
internally in the code (using the BT_L2CAP_BUF_SIZE helper macro).

Change-Id: I0637340a7d99e04020f57f49ecd8e6dcfcc4bcf4
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2015-11-06 12:19:26 +02:00 • committed by Anas Nashif
commit 8167ababe0
6 changed files with 26 additions and 28 deletions
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7
net/bluetooth/att.c
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@ -83,7 +83,8 @@ static struct bt_att bt_att_pool[CONFIG_BLUETOOTH_MAX_CONN];
/* Pool for outgoing ATT packets, default MTU is 23 */
static struct nano_fifo att_buf;
static NET_BUF_POOL(att_pool, CONFIG_BLUETOOTH_MAX_CONN,
BT_L2CAP_BUF_SIZE(23), &att_buf, NULL, 0);
BT_L2CAP_BUF_SIZE(CONFIG_BLUETOOTH_ATT_MTU),
&att_buf, NULL, 0);
static const struct bt_uuid primary_uuid = {
.type = BT_UUID_16,
@ -156,7 +157,7 @@ static uint8_t att_mtu_req(struct bt_att *att, struct net_buf *buf)
return BT_ATT_ERR_UNLIKELY;
}
mtu_server = BT_ATT_MAX_LE_MTU;
mtu_server = CONFIG_BLUETOOTH_ATT_MTU;
BT_DBG("Server MTU %u\n", mtu_server);
@ -217,7 +218,7 @@ static uint8_t att_mtu_rsp(struct bt_att *att, struct net_buf *buf)
return att_handle_rsp(att, NULL, 0, BT_ATT_ERR_INVALID_PDU);
}
att->chan.rx.mtu = min(mtu, BT_ATT_MAX_LE_MTU);
att->chan.rx.mtu = min(mtu, CONFIG_BLUETOOTH_ATT_MTU);
/* BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part F] page 484:
*