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Bluetooth: hci_raw: Add support for specifying buffer headroom

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The HCI transport implemented by an application using the HCI raw
interface may have its own buffer headroom requirements. Currently the
available headroom gets completely determined by the selected HCI
driver. E.g. most of the time this is the native controller driver
which doesn't reserve any headroom at all.

To cover for the needs of HCI raw users, add a new Kconfig variable
for the apps to set to whatever they need. Correspondingly, use the
maximum of the HCI driver and HCI raw headroom requirements for the
buffer pool definitions and the headroom initializations.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2019-11-12 17:02:13 +02:00 • committed by Carles Cufí
commit d67416321e
9 changed files with 28 additions and 14 deletions
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2
subsys/bluetooth/host/conn.c
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@ -2326,7 +2326,7 @@ struct net_buf *bt_conn_create_pdu_timeout(struct net_buf_pool *pool,
return NULL;
}
reserve += sizeof(struct bt_hci_acl_hdr) + CONFIG_BT_HCI_RESERVE;
reserve += sizeof(struct bt_hci_acl_hdr) + BT_BUF_RESERVE;
net_buf_reserve(buf, reserve);
return buf;