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dpaa2: make software VLANs usable on dpni

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dpni announces IFCAP_VLAN_MTU but internally does not increase the
maximum frame length.  Createing a vlan interface on top of a dpni
interface will result in full-sized frames not passing.
Extend the maximum frame length by ETHER_VLAN_ENCAP_LEN to allow at
least for one layer of (software) vlans for now

MFC after:	3 days
GH-Issue:	https://github.com/mcusim/freebsd-src/issues/22
Reviewed by:	dsl
Differential Revision: https://reviews.freebsd.org/D42645
This commit is contained in:
Bjoern A. Zeeb 2023-11-15 11:46:44 +00:00
parent 49a6fbe387
commit 0480dccd3f
1 changed files with 1 additions and 1 deletions
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2
sys/dev/dpaa2/dpaa2_ni.c
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@ -2556,7 +2556,7 @@ dpaa2_ni_ioctl(if_t ifp, u_long c, caddr_t data)
/* Update maximum frame length. */
error = DPAA2_CMD_NI_SET_MFL(dev, child, &cmd,
mtu + ETHER_HDR_LEN);
mtu + ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN);
if (error) {
device_printf(dev, "%s: failed to update maximum frame "
"length: error=%d\n", __func__, error);