Author: mav
Date: Sat Jul 9 11:58:59 2016
New Revision: 302494
URL: https://svnweb.freebsd.org/changeset/base/302494
Log:
Synchronize MTU code with Linux.
It is mandatory for transport compatibility.
Modified:
head/sys/dev/ntb/if_ntb/if_ntb.c
head/sys/dev/ntb/ntb_transport.c
Modified: head/sys/dev/ntb/if_ntb/if_ntb.c
==============================================================================
--- head/sys/dev/ntb/if_ntb/if_ntb.c Sat Jul 9 11:57:21 2016
(r302493)
+++ head/sys/dev/ntb/if_ntb/if_ntb.c Sat Jul 9 11:58:59 2016
(r302494)
@@ -125,8 +125,7 @@ ntb_net_attach(device_t dev)
ether_ifattach(ifp, sc->eaddr);
ifp->if_capabilities = IFCAP_HWCSUM | IFCAP_JUMBO_MTU;
ifp->if_capenable = ifp->if_capabilities;
- ifp->if_mtu = ntb_transport_max_size(sc->qp) - ETHER_HDR_LEN -
- ETHER_CRC_LEN;
+ ifp->if_mtu = ntb_transport_max_size(sc->qp) - ETHER_HDR_LEN;
ntb_transport_link_up(sc->qp);
return (0);
@@ -177,7 +176,7 @@ ntb_ioctl(struct ifnet *ifp, u_long comm
case SIOCSIFMTU:
{
if (ifr->ifr_mtu > ntb_transport_max_size(sc->qp) -
- ETHER_HDR_LEN - ETHER_CRC_LEN) {
+ ETHER_HDR_LEN) {
error = EINVAL;
break;
}
Modified: head/sys/dev/ntb/ntb_transport.c
==============================================================================
--- head/sys/dev/ntb/ntb_transport.c Sat Jul 9 11:57:21 2016
(r302493)
+++ head/sys/dev/ntb/ntb_transport.c Sat Jul 9 11:58:59 2016
(r302494)
@@ -489,8 +489,7 @@ ntb_transport_init_queue(struct ntb_tran
qp->rx_info = (void *)(qp->tx_mw + tx_size);
/* Due to house-keeping, there must be at least 2 buffs */
- qp->tx_max_frame = qmin(tx_size / 2,
- transport_mtu + sizeof(struct ntb_payload_header));
+ qp->tx_max_frame = qmin(transport_mtu, tx_size / 2);
qp->tx_max_entry = tx_size / qp->tx_max_frame;
callout_init(&qp->link_work, 0);
@@ -1170,8 +1169,7 @@ ntb_transport_setup_qp_mw(struct ntb_tra
qp->remote_rx_info = (void*)(qp->rx_buff + rx_size);
/* Due to house-keeping, there must be at least 2 buffs */
- qp->rx_max_frame = qmin(rx_size / 2,
- transport_mtu + sizeof(struct ntb_payload_header));
+ qp->rx_max_frame = qmin(transport_mtu, rx_size / 2);
qp->rx_max_entry = rx_size / qp->rx_max_frame;
qp->rx_index = 0;
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